/src/git/wt-status.c

Source
#define USE_THE_REPOSITORY_VARIABLE
#define DISABLE_SIGN_COMPARE_WARNINGS

#include "git-compat-util.h"
#include "advice.h"
#include "wt-status.h"
#include "object.h"
#include "dir.h"
#include "commit.h"
#include "diff.h"
#include "environment.h"
#include "gettext.h"
#include "hash.h"
#include "hex.h"
#include "object-name.h"
#include "path.h"
#include "revision.h"
#include "diffcore.h"
#include "quote.h"
#include "repository.h"
#include "run-command.h"
#include "strvec.h"
#include "remote.h"
#include "refs.h"
#include "submodule.h"
#include "column.h"
#include "read-cache.h"
#include "setup.h"
#include "strbuf.h"
#include "trace.h"
#include "trace2.h"
#include "tree.h"
#include "utf8.h"
#include "worktree.h"
#include "lockfile.h"
#include "sequencer.h"
#include "fsmonitor-settings.h"

#define AB_DELAY_WARNING_IN_MS (2 * 1000)
#define UF_DELAY_WARNING_IN_MS (2 * 1000)

static const char cut_line[] =
"------------------------ >8 ------------------------\n";

static char default_wt_status_colors[][COLOR_MAXLEN] = {
  GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
  GIT_COLOR_GREEN,  /* WT_STATUS_UPDATED */
  GIT_COLOR_RED,    /* WT_STATUS_CHANGED */
  GIT_COLOR_RED,    /* WT_STATUS_UNTRACKED */
  GIT_COLOR_RED,    /* WT_STATUS_NOBRANCH */
  GIT_COLOR_RED,    /* WT_STATUS_UNMERGED */
  GIT_COLOR_GREEN,  /* WT_STATUS_LOCAL_BRANCH */
  GIT_COLOR_RED,    /* WT_STATUS_REMOTE_BRANCH */
  GIT_COLOR_NIL,    /* WT_STATUS_ONBRANCH */
};

static const char *color(int slot, struct wt_status *s)
{
  const char *c = "";
  if (want_color(s->use_color))
    c = s->color_palette[slot];
  if (slot == WT_STATUS_ONBRANCH && color_is_nil(c))
    c = s->color_palette[WT_STATUS_HEADER];
  return c;
}

static void status_vprintf(struct wt_status *s, int at_bol, const char *color,
    const char *fmt, va_list ap, const char *trail)
{
  struct strbuf sb = STRBUF_INIT;
  struct strbuf linebuf = STRBUF_INIT;
  const char *line, *eol;

  strbuf_vaddf(&sb, fmt, ap);
  if (!sb.len) {
    if (s->display_comment_prefix) {
      strbuf_addstr(&sb, comment_line_str);
      if (!trail)
        strbuf_addch(&sb, ' ');
    }
    color_print_strbuf(s->fp, color, &sb);
    if (trail)
      fprintf(s->fp, "%s", trail);
    strbuf_release(&sb);
    return;
  }
  for (line = sb.buf; *line; line = eol + 1) {
    eol = strchr(line, '\n');

    strbuf_reset(&linebuf);
    if (at_bol && s->display_comment_prefix) {
      strbuf_addstr(&linebuf, comment_line_str);
      if (*line != '\n' && *line != '\t')
        strbuf_addch(&linebuf, ' ');
    }
    if (eol)
      strbuf_add(&linebuf, line, eol - line);
    else
      strbuf_addstr(&linebuf, line);
    color_print_strbuf(s->fp, color, &linebuf);
    if (eol)
      fprintf(s->fp, "\n");
    else
      break;
    at_bol = 1;
  }
  if (trail)
    fprintf(s->fp, "%s", trail);
  strbuf_release(&linebuf);
  strbuf_release(&sb);
}

void status_printf_ln(struct wt_status *s, const char *color,
      const char *fmt, ...)
{
  va_list ap;

  va_start(ap, fmt);
  status_vprintf(s, 1, color, fmt, ap, "\n");
  va_end(ap);
}

void status_printf(struct wt_status *s, const char *color,
      const char *fmt, ...)
{
  va_list ap;

  va_start(ap, fmt);
  status_vprintf(s, 1, color, fmt, ap, NULL);
  va_end(ap);
}

__attribute__((format (printf, 3, 4)))
static void status_printf_more(struct wt_status *s, const char *color,
             const char *fmt, ...)
{
  va_list ap;

  va_start(ap, fmt);
  status_vprintf(s, 0, color, fmt, ap, NULL);
  va_end(ap);
}

void wt_status_prepare(struct repository *r, struct wt_status *s)
{
  memset(s, 0, sizeof(*s));
  s->repo = r;
  memcpy(s->color_palette, default_wt_status_colors,
         sizeof(default_wt_status_colors));
  s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
  s->use_color = GIT_COLOR_UNKNOWN;
  s->relative_paths = 1;
  s->branch = refs_resolve_refdup(get_main_ref_store(r),
          "HEAD", 0, NULL, NULL);
  s->reference = "HEAD";
  s->fp = stdout;
  s->index_file = repo_get_index_file(r);
  s->change.strdup_strings = 1;
  s->untracked.strdup_strings = 1;
  s->ignored.strdup_strings = 1;
  s->show_branch = -1;  /* unspecified */
  s->show_stash = 0;
  s->ahead_behind_flags = AHEAD_BEHIND_UNSPECIFIED;
  s->display_comment_prefix = 0;
  s->detect_rename = -1;
  s->rename_score = -1;
  s->rename_limit = -1;
}

static void wt_longstatus_print_unmerged_header(struct wt_status *s)
{
  int i;
  int del_mod_conflict = 0;
  int both_deleted = 0;
  int not_deleted = 0;
  const char *c = color(WT_STATUS_HEADER, s);

  status_printf_ln(s, c, _("Unmerged paths:"));

  for (i = 0; i < s->change.nr; i++) {
    struct string_list_item *it = &(s->change.items[i]);
    struct wt_status_change_data *d = it->util;

    switch (d->stagemask) {
    case 0:
      break;
    case 1:
      both_deleted = 1;
      break;
    case 3:
    case 5:
      del_mod_conflict = 1;
      break;
    default:
      not_deleted = 1;
      break;
    }
  }

  if (!s->hints)
    return;
  if (s->whence != FROM_COMMIT)
    ;
  else if (!s->is_initial) {
    if (!strcmp(s->reference, "HEAD"))
      status_printf_ln(s, c,
           _("  (use \"git restore --staged <file>...\" to unstage)"));
    else
      status_printf_ln(s, c,
           _("  (use \"git restore --source=%s --staged <file>...\" to unstage)"),
           s->reference);
  } else
    status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));

  if (!both_deleted) {
    if (!del_mod_conflict)
      status_printf_ln(s, c, _("  (use \"git add <file>...\" to mark resolution)"));
    else
      status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
  } else if (!del_mod_conflict && !not_deleted) {
    status_printf_ln(s, c, _("  (use \"git rm <file>...\" to mark resolution)"));
  } else {
    status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
  }
}

static void wt_longstatus_print_cached_header(struct wt_status *s)
{
  const char *c = color(WT_STATUS_HEADER, s);

  status_printf_ln(s, c, _("Changes to be committed:"));
  if (!s->hints)
    return;
  if (s->whence != FROM_COMMIT)
    ; /* NEEDSWORK: use "git reset --unresolve"??? */
  else if (!s->is_initial) {
    if (!strcmp(s->reference, "HEAD"))
      status_printf_ln(s, c
           , _("  (use \"git restore --staged <file>...\" to unstage)"));
    else
      status_printf_ln(s, c,
           _("  (use \"git restore --source=%s --staged <file>...\" to unstage)"),
           s->reference);
  } else
    status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
}

static void wt_longstatus_print_dirty_header(struct wt_status *s,
               int has_deleted,
               int has_dirty_submodules)
{
  const char *c = color(WT_STATUS_HEADER, s);

  status_printf_ln(s, c, _("Changes not staged for commit:"));
  if (!s->hints)
    return;
  if (!has_deleted)
    status_printf_ln(s, c, _("  (use \"git add <file>...\" to update what will be committed)"));
  else
    status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" to update what will be committed)"));
  status_printf_ln(s, c, _("  (use \"git restore <file>...\" to discard changes in working directory)"));
  if (has_dirty_submodules)
    status_printf_ln(s, c, _("  (commit or discard the untracked or modified content in submodules)"));
}

static void wt_longstatus_print_other_header(struct wt_status *s,
               const char *what,
               const char *how)
{
  const char *c = color(WT_STATUS_HEADER, s);
  status_printf_ln(s, c, "%s:", what);
  if (!s->hints)
    return;
  status_printf_ln(s, c, _("  (use \"git %s <file>...\" to include in what will be committed)"), how);
}

static void wt_longstatus_print_trailer(struct wt_status *s)
{
  status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
}

static const char *wt_status_unmerged_status_string(int stagemask)
{
  switch (stagemask) {
  case 1:
    return _("both deleted:");
  case 2:
    return _("added by us:");
  case 3:
    return _("deleted by them:");
  case 4:
    return _("added by them:");
  case 5:
    return _("deleted by us:");
  case 6:
    return _("both added:");
  case 7:
    return _("both modified:");
  default:
    BUG("unhandled unmerged status %x", stagemask);
  }
}

static const char *wt_status_diff_status_string(int status)
{
  switch (status) {
  case DIFF_STATUS_ADDED:
    return _("new file:");
  case DIFF_STATUS_COPIED:
    return _("copied:");
  case DIFF_STATUS_DELETED:
    return _("deleted:");
  case DIFF_STATUS_MODIFIED:
    return _("modified:");
  case DIFF_STATUS_RENAMED:
    return _("renamed:");
  case DIFF_STATUS_TYPE_CHANGED:
    return _("typechange:");
  case DIFF_STATUS_UNKNOWN:
    return _("unknown:");
  case DIFF_STATUS_UNMERGED:
    return _("unmerged:");
  default:
    return NULL;
  }
}

static int maxwidth(const char *(*label)(int), int minval, int maxval)
{
  int result = 0, i;

  for (i = minval; i <= maxval; i++) {
    const char *s = label(i);
    int len = s ? utf8_strwidth(s) : 0;
    if (len > result)
      result = len;
  }
  return result;
}

static void wt_longstatus_print_unmerged_data(struct wt_status *s,
                struct string_list_item *it)
{
  const char *c = color(WT_STATUS_UNMERGED, s);
  struct wt_status_change_data *d = it->util;
  struct strbuf onebuf = STRBUF_INIT;
  static char *padding;
  static int label_width;
  const char *one, *how;
  int len;

  if (!padding) {
    label_width = maxwidth(wt_status_unmerged_status_string, 1, 7);
    label_width += strlen(" ");
    padding = xmallocz(label_width);
    memset(padding, ' ', label_width);
  }

  one = quote_path(it->string, s->prefix, &onebuf, 0);
  status_printf(s, color(WT_STATUS_HEADER, s), "\t");

  how = wt_status_unmerged_status_string(d->stagemask);
  len = label_width - utf8_strwidth(how);
  status_printf_more(s, c, "%s%.*s%s\n", how, len, padding, one);
  strbuf_release(&onebuf);
}

static void wt_longstatus_print_change_data(struct wt_status *s,
              int change_type,
              struct string_list_item *it)
{
  struct wt_status_change_data *d = it->util;
  const char *c = color(change_type, s);
  int status;
  char *one_name;
  char *two_name;
  const char *one, *two;
  struct strbuf onebuf = STRBUF_INIT, twobuf = STRBUF_INIT;
  struct strbuf extra = STRBUF_INIT;
  static char *padding;
  static int label_width;
  const char *what;
  int len;

  if (!padding) {
    /* If DIFF_STATUS_* uses outside the range [A..Z], we're in trouble */
    label_width = maxwidth(wt_status_diff_status_string, 'A', 'Z');
    label_width += strlen(" ");
    padding = xmallocz(label_width);
    memset(padding, ' ', label_width);
  }

  one_name = two_name = it->string;
  switch (change_type) {
  case WT_STATUS_UPDATED:
    status = d->index_status;
    break;
  case WT_STATUS_CHANGED:
    if (d->new_submodule_commits || d->dirty_submodule) {
      strbuf_addstr(&extra, " (");
      if (d->new_submodule_commits)
        strbuf_addstr(&extra, _("new commits, "));
      if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
        strbuf_addstr(&extra, _("modified content, "));
      if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
        strbuf_addstr(&extra, _("untracked content, "));
      strbuf_setlen(&extra, extra.len - 2);
      strbuf_addch(&extra, ')');
    }
    status = d->worktree_status;
    break;
  default:
    BUG("unhandled change_type %d in wt_longstatus_print_change_data",
        change_type);
  }

  /*
   * Only pick up the rename it's relevant. If the rename is for
   * the changed section and we're printing the updated section,
   * ignore it.
   */
  if (d->rename_status == status)
    one_name = d->rename_source;

  one = quote_path(one_name, s->prefix, &onebuf, 0);
  two = quote_path(two_name, s->prefix, &twobuf, 0);

  status_printf(s, color(WT_STATUS_HEADER, s), "\t");
  what = wt_status_diff_status_string(status);
  if (!what)
    BUG("unhandled diff status %c", status);
  len = label_width - utf8_strwidth(what);
  assert(len >= 0);
  if (one_name != two_name)
    status_printf_more(s, c, "%s%.*s%s -> %s",
           what, len, padding, one, two);
  else
    status_printf_more(s, c, "%s%.*s%s",
           what, len, padding, one);
  if (extra.len) {
    status_printf_more(s, color(WT_STATUS_HEADER, s), "%s", extra.buf);
    strbuf_release(&extra);
  }
  status_printf_more(s, GIT_COLOR_NORMAL, "\n");
  strbuf_release(&onebuf);
  strbuf_release(&twobuf);
}

static char short_submodule_status(struct wt_status_change_data *d)
{
  if (d->new_submodule_commits)
    return 'M';
  if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
    return 'm';
  if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
    return '?';
  return d->worktree_status;
}

static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
           struct diff_options *options UNUSED,
           void *data)
{
  struct wt_status *s = data;
  int i;

  if (!q->nr)
    return;
  s->workdir_dirty = 1;
  for (i = 0; i < q->nr; i++) {
    struct diff_filepair *p;
    struct string_list_item *it;
    struct wt_status_change_data *d;

    p = q->queue[i];
    it = string_list_insert(&s->change, p->two->path);
    d = it->util;
    if (!d) {
      CALLOC_ARRAY(d, 1);
      it->util = d;
    }
    if (!d->worktree_status)
      d->worktree_status = p->status;
    if (S_ISGITLINK(p->two->mode)) {
      d->dirty_submodule = p->two->dirty_submodule;
      d->new_submodule_commits = !oideq(&p->one->oid,
                &p->two->oid);
      if (s->status_format == STATUS_FORMAT_SHORT)
        d->worktree_status = short_submodule_status(d);
    }

    switch (p->status) {
    case DIFF_STATUS_ADDED:
      d->mode_worktree = p->two->mode;
      break;

    case DIFF_STATUS_DELETED:
      d->mode_index = p->one->mode;
      oidcpy(&d->oid_index, &p->one->oid);
      /* mode_worktree is zero for a delete. */
      break;

    case DIFF_STATUS_COPIED:
    case DIFF_STATUS_RENAMED:
      if (d->rename_status)
        BUG("multiple renames on the same target? how?");
      d->rename_source = xstrdup(p->one->path);
      d->rename_score = p->score * 100 / MAX_SCORE;
      d->rename_status = p->status;
      /* fallthru */
    case DIFF_STATUS_MODIFIED:
    case DIFF_STATUS_TYPE_CHANGED:
    case DIFF_STATUS_UNMERGED:
      d->mode_index = p->one->mode;
      d->mode_worktree = p->two->mode;
      oidcpy(&d->oid_index, &p->one->oid);
      break;

    default:
      BUG("unhandled diff-files status '%c'", p->status);
      break;
    }

  }
}

static int unmerged_mask(struct index_state *istate, const char *path)
{
  int pos, mask;
  const struct cache_entry *ce;

  pos = index_name_pos(istate, path, strlen(path));
  if (0 <= pos)
    return 0;

  mask = 0;
  pos = -pos-1;
  while (pos < istate->cache_nr) {
    ce = istate->cache[pos++];
    if (strcmp(ce->name, path) || !ce_stage(ce))
      break;
    mask |= (1 << (ce_stage(ce) - 1));
  }
  return mask;
}

static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
           struct diff_options *options UNUSED,
           void *data)
{
  struct wt_status *s = data;
  int i;

  for (i = 0; i < q->nr; i++) {
    struct diff_filepair *p;
    struct string_list_item *it;
    struct wt_status_change_data *d;

    p = q->queue[i];
    it = string_list_insert(&s->change, p->two->path);
    d = it->util;
    if (!d) {
      CALLOC_ARRAY(d, 1);
      it->util = d;
    }
    if (!d->index_status)
      d->index_status = p->status;
    switch (p->status) {
    case DIFF_STATUS_ADDED:
      /* Leave {mode,oid}_head zero for an add. */
      d->mode_index = p->two->mode;
      oidcpy(&d->oid_index, &p->two->oid);
      s->committable = 1;
      break;
    case DIFF_STATUS_DELETED:
      d->mode_head = p->one->mode;
      oidcpy(&d->oid_head, &p->one->oid);
      s->committable = 1;
      /* Leave {mode,oid}_index zero for a delete. */
      break;

    case DIFF_STATUS_COPIED:
    case DIFF_STATUS_RENAMED:
      if (d->rename_status)
        BUG("multiple renames on the same target? how?");
      d->rename_source = xstrdup(p->one->path);
      d->rename_score = p->score * 100 / MAX_SCORE;
      d->rename_status = p->status;
      /* fallthru */
    case DIFF_STATUS_MODIFIED:
    case DIFF_STATUS_TYPE_CHANGED:
      d->mode_head = p->one->mode;
      d->mode_index = p->two->mode;
      oidcpy(&d->oid_head, &p->one->oid);
      oidcpy(&d->oid_index, &p->two->oid);
      s->committable = 1;
      break;
    case DIFF_STATUS_UNMERGED:
      d->stagemask = unmerged_mask(s->repo->index,
                 p->two->path);
      /*
       * Don't bother setting {mode,oid}_{head,index} since the print
       * code will output the stage values directly and not use the
       * values in these fields.
       */
      break;

    default:
      BUG("unhandled diff-index status '%c'", p->status);
      break;
    }
  }
}

void wt_status_collect_changes_trees(struct wt_status *s,
             const struct object_id *old_treeish,
             const struct object_id *new_treeish)
{
  struct diff_options opts = { 0 };

  repo_diff_setup(s->repo, &opts);
  opts.output_format = DIFF_FORMAT_CALLBACK;
  opts.format_callback = wt_status_collect_updated_cb;
  opts.format_callback_data = s;
  opts.detect_rename = s->detect_rename >= 0 ? s->detect_rename : opts.detect_rename;
  opts.rename_limit = s->rename_limit >= 0 ? s->rename_limit : opts.rename_limit;
  opts.rename_score = s->rename_score >= 0 ? s->rename_score : opts.rename_score;
  opts.flags.recursive = 1;
  diff_setup_done(&opts);

  diff_tree_oid(old_treeish, new_treeish, "", &opts);
  diffcore_std(&opts);
  diff_flush(&opts);
  wt_status_get_state(s->repo, &s->state, 0);

  diff_free(&opts);
}

static void wt_status_collect_changes_worktree(struct wt_status *s)
{
  struct rev_info rev;

  repo_init_revisions(s->repo, &rev, NULL);
  setup_revisions(0, NULL, &rev, NULL);
  rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
  rev.diffopt.flags.dirty_submodules = 1;
  rev.diffopt.ita_invisible_in_index = 1;
  if (!s->show_untracked_files)
    rev.diffopt.flags.ignore_untracked_in_submodules = 1;
  if (s->ignore_submodule_arg) {
    rev.diffopt.flags.override_submodule_config = 1;
    handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
  } else if (!rev.diffopt.flags.ignore_submodule_set &&
      s->show_untracked_files != SHOW_NO_UNTRACKED_FILES)
    handle_ignore_submodules_arg(&rev.diffopt, "none");
  rev.diffopt.format_callback = wt_status_collect_changed_cb;
  rev.diffopt.format_callback_data = s;
  rev.diffopt.detect_rename = s->detect_rename >= 0 ? s->detect_rename : rev.diffopt.detect_rename;
  rev.diffopt.rename_limit = s->rename_limit >= 0 ? s->rename_limit : rev.diffopt.rename_limit;
  rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
  copy_pathspec(&rev.prune_data, &s->pathspec);
  run_diff_files(&rev, 0);
  release_revisions(&rev);
}

static void wt_status_collect_changes_index(struct wt_status *s)
{
  struct rev_info rev;
  struct setup_revision_opt opt;

  repo_init_revisions(s->repo, &rev, NULL);
  memset(&opt, 0, sizeof(opt));
  opt.def = s->is_initial ? empty_tree_oid_hex(s->repo->hash_algo) : s->reference;
  setup_revisions(0, NULL, &rev, &opt);

  rev.diffopt.flags.override_submodule_config = 1;
  rev.diffopt.ita_invisible_in_index = 1;
  if (s->ignore_submodule_arg) {
    handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
  } else {
    /*
     * Unless the user did explicitly request a submodule ignore
     * mode by passing a command line option we do not ignore any
     * changed submodule SHA-1s when comparing index and HEAD, no
     * matter what is configured. Otherwise the user won't be
     * shown any submodules manually added (and which are
     * staged to be committed), which would be really confusing.
     */
    handle_ignore_submodules_arg(&rev.diffopt, "dirty");
  }

  rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
  rev.diffopt.format_callback = wt_status_collect_updated_cb;
  rev.diffopt.format_callback_data = s;
  rev.diffopt.detect_rename = s->detect_rename >= 0 ? s->detect_rename : rev.diffopt.detect_rename;
  rev.diffopt.rename_limit = s->rename_limit >= 0 ? s->rename_limit : rev.diffopt.rename_limit;
  rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;

  /*
   * The `recursive` option must be enabled to allow the diff to recurse
   * into subdirectories of sparse directory index entries. If it is not
   * enabled, a subdirectory containing file(s) with changes is reported
   * as "modified", rather than the modified files themselves.
   */
  rev.diffopt.flags.recursive = 1;

  copy_pathspec(&rev.prune_data, &s->pathspec);
  run_diff_index(&rev, DIFF_INDEX_CACHED);
  release_revisions(&rev);
}

static int add_file_to_list(const struct object_id *oid,
          struct strbuf *base, const char *path,
          unsigned int mode, void *context)
{
  struct string_list_item *it;
  struct wt_status_change_data *d;
  struct wt_status *s = context;
  struct strbuf full_name = STRBUF_INIT;

  if (S_ISDIR(mode))
    return READ_TREE_RECURSIVE;

  strbuf_add(&full_name, base->buf, base->len);
  strbuf_addstr(&full_name, path);
  it = string_list_insert(&s->change, full_name.buf);
  d = it->util;
  if (!d) {
    CALLOC_ARRAY(d, 1);
    it->util = d;
  }

  d->index_status = DIFF_STATUS_ADDED;
  /* Leave {mode,oid}_head zero for adds. */
  d->mode_index = mode;
  oidcpy(&d->oid_index, oid);
  s->committable = 1;
  strbuf_release(&full_name);
  return 0;
}

static void wt_status_collect_changes_initial(struct wt_status *s)
{
  struct index_state *istate = s->repo->index;
  struct strbuf base = STRBUF_INIT;
  int i;

  for (i = 0; i < istate->cache_nr; i++) {
    struct string_list_item *it;
    struct wt_status_change_data *d;
    const struct cache_entry *ce = istate->cache[i];

    if (!ce_path_match(istate, ce, &s->pathspec, NULL))
      continue;
    if (ce_intent_to_add(ce))
      continue;
    if (S_ISSPARSEDIR(ce->ce_mode)) {
      /*
       * This is a sparse directory entry, so we want to collect all
       * of the added files within the tree. This requires recursively
       * expanding the trees to find the elements that are new in this
       * tree and marking them with DIFF_STATUS_ADDED.
       */
      struct pathspec ps = { 0 };
      struct tree *tree = lookup_tree(istate->repo, &ce->oid);

      ps.recursive = 1;
      ps.has_wildcard = 1;
      ps.max_depth = -1;

      strbuf_reset(&base);
      strbuf_add(&base, ce->name, ce->ce_namelen);
      read_tree_at(istate->repo, tree, &base, 0, &ps,
             add_file_to_list, s);

      continue;
    }

    it = string_list_insert(&s->change, ce->name);
    d = it->util;
    if (!d) {
      CALLOC_ARRAY(d, 1);
      it->util = d;
    }
    if (ce_stage(ce)) {
      d->index_status = DIFF_STATUS_UNMERGED;
      d->stagemask |= (1 << (ce_stage(ce) - 1));
      /*
       * Don't bother setting {mode,oid}_{head,index} since the print
       * code will output the stage values directly and not use the
       * values in these fields.
       */
      s->committable = 1;
    } else {
      d->index_status = DIFF_STATUS_ADDED;
      /* Leave {mode,oid}_head zero for adds. */
      d->mode_index = ce->ce_mode;
      oidcpy(&d->oid_index, &ce->oid);
      s->committable = 1;
    }
  }

  strbuf_release(&base);
}

static void wt_status_collect_untracked(struct wt_status *s)
{
  int i;
  struct dir_struct dir = DIR_INIT;
  uint64_t t_begin = getnanotime();
  struct index_state *istate = s->repo->index;

  if (!s->show_untracked_files)
    return;

  if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
    dir.flags |=
      DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
  if (s->show_ignored_mode) {
    dir.flags |= DIR_SHOW_IGNORED_TOO;

    if (s->show_ignored_mode == SHOW_MATCHING_IGNORED)
      dir.flags |= DIR_SHOW_IGNORED_TOO_MODE_MATCHING;
  } else {
    dir.untracked = istate->untracked;
  }

  setup_standard_excludes(&dir);

  fill_directory(&dir, istate, &s->pathspec);

  for (i = 0; i < dir.nr; i++) {
    struct dir_entry *ent = dir.entries[i];
    if (index_name_is_other(istate, ent->name, ent->len))
      string_list_append(&s->untracked, ent->name);
  }
  string_list_sort_u(&s->untracked, 0);

  for (i = 0; i < dir.ignored_nr; i++) {
    struct dir_entry *ent = dir.ignored[i];
    if (index_name_is_other(istate, ent->name, ent->len))
      string_list_append(&s->ignored, ent->name);
  }
  string_list_sort_u(&s->ignored, 0);

  dir_clear(&dir);

  if (advice_enabled(ADVICE_STATUS_U_OPTION))
    s->untracked_in_ms = (getnanotime() - t_begin) / 1000000;
}

static int has_unmerged(struct wt_status *s)
{
  int i;

  for (i = 0; i < s->change.nr; i++) {
    struct wt_status_change_data *d;
    d = s->change.items[i].util;
    if (d->stagemask)
      return 1;
  }
  return 0;
}

void wt_status_collect(struct wt_status *s)
{
  trace2_region_enter("status", "worktrees", s->repo);
  wt_status_collect_changes_worktree(s);
  trace2_region_leave("status", "worktrees", s->repo);

  if (s->is_initial) {
    trace2_region_enter("status", "initial", s->repo);
    wt_status_collect_changes_initial(s);
    trace2_region_leave("status", "initial", s->repo);
  } else {
    trace2_region_enter("status", "index", s->repo);
    wt_status_collect_changes_index(s);
    trace2_region_leave("status", "index", s->repo);
  }

  trace2_region_enter("status", "untracked", s->repo);
  wt_status_collect_untracked(s);
  trace2_region_leave("status", "untracked", s->repo);

  wt_status_get_state(s->repo, &s->state, s->branch && !strcmp(s->branch, "HEAD"));
  if (s->state.merge_in_progress && !has_unmerged(s))
    s->committable = 1;
}

void wt_status_collect_free_buffers(struct wt_status *s)
{
  wt_status_state_free_buffers(&s->state);
}

void wt_status_state_free_buffers(struct wt_status_state *state)
{
  FREE_AND_NULL(state->branch);
  FREE_AND_NULL(state->onto);
  FREE_AND_NULL(state->detached_from);
  FREE_AND_NULL(state->bisecting_from);
}

static void wt_longstatus_print_unmerged(struct wt_status *s)
{
  int shown_header = 0;
  int i;

  for (i = 0; i < s->change.nr; i++) {
    struct wt_status_change_data *d;
    struct string_list_item *it;
    it = &(s->change.items[i]);
    d = it->util;
    if (!d->stagemask)
      continue;
    if (!shown_header) {
      wt_longstatus_print_unmerged_header(s);
      shown_header = 1;
    }
    wt_longstatus_print_unmerged_data(s, it);
  }
  if (shown_header)
    wt_longstatus_print_trailer(s);

}

static void wt_longstatus_print_updated(struct wt_status *s)
{
  int shown_header = 0;
  int i;

  for (i = 0; i < s->change.nr; i++) {
    struct wt_status_change_data *d;
    struct string_list_item *it;
    it = &(s->change.items[i]);
    d = it->util;
    if (!d->index_status ||
        d->index_status == DIFF_STATUS_UNMERGED)
      continue;
    if (!shown_header) {
      wt_longstatus_print_cached_header(s);
      shown_header = 1;
    }
    wt_longstatus_print_change_data(s, WT_STATUS_UPDATED, it);
  }
  if (shown_header)
    wt_longstatus_print_trailer(s);
}

/*
 * -1 : has delete
 *  0 : no change
 *  1 : some change but no delete
 */
static int wt_status_check_worktree_changes(struct wt_status *s,
               int *dirty_submodules)
{
  int i;
  int changes = 0;

  *dirty_submodules = 0;

  for (i = 0; i < s->change.nr; i++) {
    struct wt_status_change_data *d;
    d = s->change.items[i].util;
    if (!d->worktree_status ||
        d->worktree_status == DIFF_STATUS_UNMERGED)
      continue;
    if (!changes)
      changes = 1;
    if (d->dirty_submodule)
      *dirty_submodules = 1;
    if (d->worktree_status == DIFF_STATUS_DELETED)
      changes = -1;
  }
  return changes;
}

static void wt_longstatus_print_changed(struct wt_status *s)
{
  int i, dirty_submodules;
  int worktree_changes = wt_status_check_worktree_changes(s, &dirty_submodules);

  if (!worktree_changes)
    return;

  wt_longstatus_print_dirty_header(s, worktree_changes < 0, dirty_submodules);

  for (i = 0; i < s->change.nr; i++) {
    struct wt_status_change_data *d;
    struct string_list_item *it;
    it = &(s->change.items[i]);
    d = it->util;
    if (!d->worktree_status ||
        d->worktree_status == DIFF_STATUS_UNMERGED)
      continue;
    wt_longstatus_print_change_data(s, WT_STATUS_CHANGED, it);
  }
  wt_longstatus_print_trailer(s);
}

static int stash_count_refs(const char *refname UNUSED,
          struct object_id *ooid UNUSED,
          struct object_id *noid UNUSED,
          const char *email UNUSED,
          timestamp_t timestamp UNUSED, int tz UNUSED,
          const char *message UNUSED, void *cb_data)
{
  int *c = cb_data;
  (*c)++;
  return 0;
}

static int count_stash_entries(struct repository *r)
{
  int n = 0;
  refs_for_each_reflog_ent(get_main_ref_store(r),
         "refs/stash", stash_count_refs, &n);
  return n;
}

static void wt_longstatus_print_stash_summary(struct wt_status *s)
{
  int stash_count = count_stash_entries(s->repo);

  if (stash_count > 0)
    status_printf_ln(s, GIT_COLOR_NORMAL,
         Q_("Your stash currently has %d entry",
            "Your stash currently has %d entries", stash_count),
         stash_count);
}

static void wt_longstatus_print_submodule_summary(struct wt_status *s, int uncommitted)
{
  struct child_process sm_summary = CHILD_PROCESS_INIT;
  struct strbuf cmd_stdout = STRBUF_INIT;
  struct strbuf summary = STRBUF_INIT;
  char *summary_content;

  strvec_pushf(&sm_summary.env, "GIT_INDEX_FILE=%s", s->index_file);

  strvec_push(&sm_summary.args, "submodule");
  strvec_push(&sm_summary.args, "summary");
  strvec_push(&sm_summary.args, uncommitted ? "--files" : "--cached");
  strvec_push(&sm_summary.args, "--for-status");
  strvec_push(&sm_summary.args, "--summary-limit");
  strvec_pushf(&sm_summary.args, "%d", s->submodule_summary);
  if (!uncommitted)
    strvec_push(&sm_summary.args, s->amend ? "HEAD^" : "HEAD");

  sm_summary.git_cmd = 1;
  sm_summary.no_stdin = 1;

  capture_command(&sm_summary, &cmd_stdout, 1024);

  /* prepend header, only if there's an actual output */
  if (cmd_stdout.len) {
    if (uncommitted)
      strbuf_addstr(&summary, _("Submodules changed but not updated:"));
    else
      strbuf_addstr(&summary, _("Submodule changes to be committed:"));
    strbuf_addstr(&summary, "\n\n");
  }
  strbuf_addbuf(&summary, &cmd_stdout);
  strbuf_release(&cmd_stdout);

  if (s->display_comment_prefix) {
    size_t len;
    summary_content = strbuf_detach(&summary, &len);
    strbuf_add_commented_lines(&summary, summary_content, len, comment_line_str);
    free(summary_content);
  }

  fputs(summary.buf, s->fp);
  strbuf_release(&summary);
}

static void wt_longstatus_print_other(struct wt_status *s,
              struct string_list *l,
              const char *what,
              const char *how)
{
  int i;
  struct strbuf buf = STRBUF_INIT;
  static struct string_list output = STRING_LIST_INIT_DUP;
  struct column_options copts;

  if (!l->nr)
    return;

  wt_longstatus_print_other_header(s, what, how);

  for (i = 0; i < l->nr; i++) {
    struct string_list_item *it;
    const char *path;
    it = &(l->items[i]);
    path = quote_path(it->string, s->prefix, &buf, 0);
    if (column_active(s->colopts)) {
      string_list_append(&output, path);
      continue;
    }
    status_printf(s, color(WT_STATUS_HEADER, s), "\t");
    status_printf_more(s, color(WT_STATUS_UNTRACKED, s),
           "%s\n", path);
  }

  strbuf_release(&buf);
  if (!column_active(s->colopts))
    goto conclude;

  strbuf_addf(&buf, "%s%s\t%s",
        color(WT_STATUS_HEADER, s),
        s->display_comment_prefix ? "#" : "",
        color(WT_STATUS_UNTRACKED, s));
  memset(&copts, 0, sizeof(copts));
  copts.padding = 1;
  copts.indent = buf.buf;
  if (want_color(s->use_color))
    copts.nl = GIT_COLOR_RESET "\n";
  print_columns(&output, s->colopts, &copts);
  string_list_clear(&output, 0);
  strbuf_release(&buf);
conclude:
  status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
}

size_t wt_status_locate_end(const char *s, size_t len)
{
  const char *p;
  struct strbuf pattern = STRBUF_INIT;

  strbuf_addf(&pattern, "\n%s %s", comment_line_str, cut_line);
  if (starts_with(s, pattern.buf + 1))
    len = 0;
  else if ((p = strstr(s, pattern.buf))) {
    size_t newlen = p - s + 1;
    if (newlen < len)
      len = newlen;
  }
  strbuf_release(&pattern);
  return len;
}

void wt_status_append_cut_line(struct strbuf *buf)
{
  const char *explanation = _("Do not modify or remove the line above.\nEverything below it will be ignored.");

  strbuf_commented_addf(buf, comment_line_str, "%s", cut_line);
  strbuf_add_commented_lines(buf, explanation, strlen(explanation), comment_line_str);
}

void wt_status_add_cut_line(struct wt_status *s)
{
  struct strbuf buf = STRBUF_INIT;

  if (s->added_cut_line)
    return;
  s->added_cut_line = 1;
  wt_status_append_cut_line(&buf);
  fputs(buf.buf, s->fp);
  strbuf_release(&buf);
}

static void wt_longstatus_print_verbose(struct wt_status *s)
{
  struct rev_info rev;
  struct setup_revision_opt opt;
  int dirty_submodules;
  const char *c = color(WT_STATUS_HEADER, s);

  repo_init_revisions(s->repo, &rev, NULL);
  rev.diffopt.flags.allow_textconv = 1;
  rev.diffopt.ita_invisible_in_index = 1;

  memset(&opt, 0, sizeof(opt));
  opt.def = s->is_initial ? empty_tree_oid_hex(s->repo->hash_algo) : s->reference;
  setup_revisions(0, NULL, &rev, &opt);

  rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
  rev.diffopt.detect_rename = s->detect_rename >= 0 ? s->detect_rename : rev.diffopt.detect_rename;
  rev.diffopt.rename_limit = s->rename_limit >= 0 ? s->rename_limit : rev.diffopt.rename_limit;
  rev.diffopt.rename_score = s->rename_score >= 0 ? s->rename_score : rev.diffopt.rename_score;
  rev.diffopt.file = s->fp;
  rev.diffopt.close_file = 0;
  /*
   * If we're not going to stdout, then we definitely don't
   * want color, since we are going to the commit message
   * file (and even the "auto" setting won't work, since it
   * will have checked isatty on stdout). But we then do want
   * to insert the scissor line here to reliably remove the
   * diff before committing, if we didn't already include one
   * before.
   */
  if (s->fp != stdout) {
    rev.diffopt.use_color = GIT_COLOR_NEVER;
    wt_status_add_cut_line(s);
  }
  if (s->verbose > 1 && s->committable) {
    /* print_updated() printed a header, so do we */
    if (s->fp != stdout)
      wt_longstatus_print_trailer(s);
    status_printf_ln(s, c, _("Changes to be committed:"));
    rev.diffopt.a_prefix = "c/";
    rev.diffopt.b_prefix = "i/";
  } /* else use prefix as per user config */
  run_diff_index(&rev, DIFF_INDEX_CACHED);
  if (s->verbose > 1 &&
      wt_status_check_worktree_changes(s, &dirty_submodules)) {
    status_printf_ln(s, c,
      "--------------------------------------------------");
    status_printf_ln(s, c, _("Changes not staged for commit:"));
    setup_work_tree(the_repository);
    rev.diffopt.a_prefix = "i/";
    rev.diffopt.b_prefix = "w/";
    run_diff_files(&rev, 0);
  }
  release_revisions(&rev);
}

static void wt_longstatus_print_tracking(struct wt_status *s)
{
  struct strbuf sb = STRBUF_INIT;
  const char *cp, *ep, *branch_name;
  struct branch *branch;
  uint64_t t_begin = 0;

  assert(s->branch && !s->is_initial);
  if (!skip_prefix(s->branch, "refs/heads/", &branch_name))
    return;
  branch = branch_get(branch_name);

  t_begin = getnanotime();

  if (!format_tracking_info(branch, &sb, s->ahead_behind_flags,
          !s->commit_template))
    return;

  if (advice_enabled(ADVICE_STATUS_AHEAD_BEHIND_WARNING) &&
      s->ahead_behind_flags == AHEAD_BEHIND_FULL) {
    uint64_t t_delta_in_ms = (getnanotime() - t_begin) / 1000000;
    if (t_delta_in_ms > AB_DELAY_WARNING_IN_MS) {
      strbuf_addf(&sb, _("\n"
             "It took %.2f seconds to compute the branch ahead/behind values.\n"
             "You can use '--no-ahead-behind' to avoid this.\n"),
            t_delta_in_ms / 1000.0);
    }
  }

  for (cp = sb.buf; (ep = strchr(cp, '\n')) != NULL; cp = ep + 1)
    color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s),
         "%s%s%.*s",
         s->display_comment_prefix ? comment_line_str : "",
         s->display_comment_prefix ? " " : "",
         (int)(ep - cp), cp);
  if (s->display_comment_prefix)
    color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "%s",
         comment_line_str);
  else
    fputs("\n", s->fp);
  strbuf_release(&sb);
}

static int uf_was_slow(struct wt_status *s)
{
  if (getenv("GIT_TEST_UF_DELAY_WARNING"))
    s->untracked_in_ms = 3250;
  return UF_DELAY_WARNING_IN_MS < s->untracked_in_ms;
}

static void show_merge_in_progress(struct wt_status *s,
           const char *color)
{
  if (has_unmerged(s)) {
    status_printf_ln(s, color, _("You have unmerged paths."));
    if (s->hints) {
      status_printf_ln(s, color,
           _("  (fix conflicts and run \"git commit\")"));
      status_printf_ln(s, color,
           _("  (use \"git merge --abort\" to abort the merge)"));
    }
  } else {
    status_printf_ln(s, color,
      _("All conflicts fixed but you are still merging."));
    if (s->hints)
      status_printf_ln(s, color,
        _("  (use \"git commit\" to conclude merge)"));
  }
  wt_longstatus_print_trailer(s);
}

static void show_am_in_progress(struct wt_status *s,
        const char *color)
{
  int am_empty_patch;

  status_printf_ln(s, color,
    _("You are in the middle of an am session."));
  if (s->state.am_empty_patch)
    status_printf_ln(s, color,
      _("The current patch is empty."));
  if (s->hints) {
    am_empty_patch = s->state.am_empty_patch;
    if (!am_empty_patch)
      status_printf_ln(s, color,
        _("  (fix conflicts and then run \"git am --continue\")"));
    status_printf_ln(s, color,
      _("  (use \"git am --skip\" to skip this patch)"));
    if (am_empty_patch)
      status_printf_ln(s, color,
        _("  (use \"git am --allow-empty\" to record this patch as an empty commit)"));
    status_printf_ln(s, color,
      _("  (use \"git am --abort\" to restore the original branch)"));
  }
  wt_longstatus_print_trailer(s);
}

static char *read_line_from_git_path(struct repository *r, const char *filename)
{
  struct strbuf buf = STRBUF_INIT;
  FILE *fp = fopen_or_warn(repo_git_path_append(r, &buf,
                  "%s", filename), "r");

  if (!fp) {
    strbuf_release(&buf);
    return NULL;
  }
  strbuf_getline_lf(&buf, fp);
  if (!fclose(fp)) {
    return strbuf_detach(&buf, NULL);
  } else {
    strbuf_release(&buf);
    return NULL;
  }
}

static int split_commit_in_progress(struct wt_status *s)
{
  int split_in_progress = 0;
  struct object_id head_oid, orig_head_oid;
  char *rebase_amend, *rebase_orig_head;
  int head_flags, orig_head_flags;

  if ((!s->amend && !s->nowarn && !s->workdir_dirty) ||
      !s->branch || strcmp(s->branch, "HEAD"))
    return 0;

  if (refs_read_ref_full(get_main_ref_store(s->repo), "HEAD", RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
             &head_oid, &head_flags) ||
      refs_read_ref_full(get_main_ref_store(s->repo), "ORIG_HEAD", RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
             &orig_head_oid, &orig_head_flags))
    return 0;
  if (head_flags & REF_ISSYMREF || orig_head_flags & REF_ISSYMREF)
    return 0;

  rebase_amend = read_line_from_git_path(s->repo, "rebase-merge/amend");
  rebase_orig_head = read_line_from_git_path(s->repo, "rebase-merge/orig-head");

  if (!rebase_amend || !rebase_orig_head)
    ; /* fall through, no split in progress */
  else if (!strcmp(rebase_amend, rebase_orig_head))
    split_in_progress = !!strcmp(oid_to_hex(&head_oid), rebase_amend);
  else if (strcmp(oid_to_hex(&orig_head_oid), rebase_orig_head))
    split_in_progress = 1;

  free(rebase_amend);
  free(rebase_orig_head);

  return split_in_progress;
}

/*
 * If the whitespace-delimited token starting at or just after *pp
 * is a hex object id that is longer than its default abbreviation,
 * abbreviate it in-place, shrinking `line` accordingly. On return
 * *pp points one past the (possibly abbreviated) token. Leaves both
 * `line` and *pp-advanced-past-the-token unchanged in all other cases
 * (non-hex token, label name, unresolvable, or a refname that happens
 * to consist only of hex digits).
 */
static void abbrev_oid_in_line(struct repository *r, struct strbuf *scratch,
             struct strbuf *line, bool maybe_label, char **pp)
{
  char *p = *pp;
  char *end_of_object_name, saved;
  const char *abbrev;
  struct object_id oid;
  bool have_oid;

  p += strspn(p, " \t");
  end_of_object_name = p + strcspn(p, " \t");
  /*
   * For "merge" and "reset" the object name may be a label or
   * ref rather than a hex object id. Only abbreviate the object
   * name if it is a hex object id.
   */
  for (const char *q = p; q < end_of_object_name; q++) {
    if (!isxdigit(*q))
      goto out;
  }
  if (maybe_label) {
    strbuf_reset(scratch);
    strbuf_addf(scratch, "refs/rewritten/%.*s",
          (int)(end_of_object_name - p), p);
    if (refs_ref_exists(get_main_ref_store(r), scratch->buf))
      goto out; /* object name was a label */
  }
  saved = *end_of_object_name;
  *end_of_object_name = '\0';
  have_oid = !repo_get_oid(r, p, &oid);
  *end_of_object_name = saved;
  if (!have_oid)
    goto out; /* invalid object name */
  abbrev = repo_find_unique_abbrev(r, &oid, DEFAULT_ABBREV);
  if (!starts_with(p, abbrev))
    goto out; /* object name was a refname containing only xdigits */
  p += strlen(abbrev);
  strbuf_remove(line, p - line->buf, end_of_object_name - p);
  end_of_object_name = p;
out:
  *pp = end_of_object_name;
}

/* Skip "[ \t]*(-[cC])?", returns true if "-c/-C" was skipped. */
static bool skip_dash_c(char **pp)
{
  bool ret;
  char *p = *pp;

  p += strspn(p, " \t");
  ret = skip_prefix(p, "-C", &p) || skip_prefix(p, "-c", &p);
  *pp = p;

  return ret;
}

/*
 * Turn
 * "pick d6a2f0303e897ec257dd0e0a39a5ccb709bc2047 some message"
 * into
 * "pick d6a2f03 some message"
 *
 * Returns false on comment lines, true otherwise
 */
static bool format_todo_line(struct repository *r, struct strbuf *line)
{
  enum todo_command cmd;
  struct strbuf scratch = STRBUF_INIT;
  char *p = line->buf;

  if (!sequencer_parse_todo_command((const char **)&p, &cmd))
    return true; /* keep invalid lines */

  switch (cmd) {
  case TODO_COMMENT:
    return false;

  case TODO_MERGE: {
    /*
     * The argument to -C cannot be a label, but the parents
     * can be labels.
     */
    bool maybe_label = !skip_dash_c(&p);

    while (true) {
      p += strspn(p, " \t");
      if (!p[0] || (p[0] == '#' && (!p[1] || isspace(p[1]))))
        break;
      abbrev_oid_in_line(r, &scratch, line, maybe_label, &p);
      maybe_label = true;
    }
    break;
  }

  case TODO_FIXUP:
    skip_dash_c(&p);
    /* fallthrough */
  case TODO_DROP:
  case TODO_EDIT:
  case TODO_PICK:
  case TODO_REVERT:
  case TODO_REWORD:
  case TODO_SQUASH:
    abbrev_oid_in_line(r, &scratch, line, false, &p);
    break;

  case TODO_RESET:
    abbrev_oid_in_line(r, &scratch, line, true, &p);
    break;
  /*
   * Avoid "default" and instead list all the other commands so
   * that -Wswitch (which is included in -Wall) warns if a new
   * command is added without handling it in this function.
   */
  case TODO_BREAK:
  case TODO_EXEC:
  case TODO_LABEL:
  case TODO_NOOP:
  case TODO_UPDATE_REF:
    break;
  }

  strbuf_release(&scratch);
  return true;
}

static int read_rebase_todolist(struct repository *r, const char *fname, struct string_list *lines)
{
  struct strbuf buf = STRBUF_INIT;
  FILE *f = fopen(repo_git_path_append(r, &buf, "%s", fname), "r");
  int ret;

  if (!f) {
    if (errno == ENOENT) {
      ret = -1;
      goto out;
    }
    die_errno("Could not open file %s for reading",
        repo_git_path_replace(r, &buf, "%s", fname));
  }
  while (!strbuf_getline_lf(&buf, f)) {
    strbuf_trim(&buf);
    if (format_todo_line(r, &buf))
      string_list_append(lines, buf.buf);
  }
  fclose(f);

  ret = 0;
out:
  strbuf_release(&buf);
  return ret;
}

static void show_rebase_information(struct wt_status *s,
            const char *color)
{
  if (s->state.rebase_interactive_in_progress) {
    int i;
    int nr_lines_to_show = 2;

    struct string_list have_done = STRING_LIST_INIT_DUP;
    struct string_list yet_to_do = STRING_LIST_INIT_DUP;

    read_rebase_todolist(s->repo, "rebase-merge/done", &have_done);
    if (read_rebase_todolist(s->repo, "rebase-merge/git-rebase-todo",
           &yet_to_do))
      status_printf_ln(s, color,
        _("git-rebase-todo is missing."));
    if (have_done.nr == 0)
      status_printf_ln(s, color, _("No commands done."));
    else {
      status_printf_ln(s, color,
        Q_("Last command done (%"PRIuMAX" command done):",
          "Last commands done (%"PRIuMAX" commands done):",
          have_done.nr),
        (uintmax_t)have_done.nr);
      for (i = (have_done.nr > nr_lines_to_show)
        ? have_done.nr - nr_lines_to_show : 0;
        i < have_done.nr;
        i++)
        status_printf_ln(s, color, "   %s", have_done.items[i].string);
      if (have_done.nr > nr_lines_to_show && s->hints) {
        char *path = repo_git_path(s->repo, "rebase-merge/done");
        status_printf_ln(s, color,
          _("  (see more in file %s)"), path);
        free(path);
      }
    }

    if (yet_to_do.nr == 0)
      status_printf_ln(s, color,
           _("No commands remaining."));
    else {
      status_printf_ln(s, color,
        Q_("Next command to do (%"PRIuMAX" remaining command):",
          "Next commands to do (%"PRIuMAX" remaining commands):",
          yet_to_do.nr),
        (uintmax_t)yet_to_do.nr);
      for (i = 0; i < nr_lines_to_show && i < yet_to_do.nr; i++)
        status_printf_ln(s, color, "   %s", yet_to_do.items[i].string);
      if (s->hints)
        status_printf_ln(s, color,
          _("  (use \"git rebase --edit-todo\" to view and edit)"));
    }
    string_list_clear(&yet_to_do, 0);
    string_list_clear(&have_done, 0);
  }
}

static void print_rebase_state(struct wt_status *s,
             const char *color)
{
  if (s->state.branch)
    status_printf_ln(s, color,
         _("You are currently rebasing branch '%s' on '%s'."),
         s->state.branch,
         s->state.onto);
  else
    status_printf_ln(s, color,
         _("You are currently rebasing."));
}

static void show_rebase_in_progress(struct wt_status *s,
            const char *color)
{
  struct stat st;

  show_rebase_information(s, color);
  if (has_unmerged(s)) {
    print_rebase_state(s, color);
    if (s->hints) {
      status_printf_ln(s, color,
        _("  (fix conflicts and then run \"git rebase --continue\")"));
      status_printf_ln(s, color,
        _("  (use \"git rebase --skip\" to skip this patch)"));
      status_printf_ln(s, color,
        _("  (use \"git rebase --abort\" to check out the original branch)"));
    }
  } else if (s->state.rebase_in_progress ||
       !stat(git_path_merge_msg(s->repo), &st)) {
    print_rebase_state(s, color);
    if (s->hints)
      status_printf_ln(s, color,
        _("  (all conflicts fixed: run \"git rebase --continue\")"));
  } else if (split_commit_in_progress(s)) {
    if (s->state.branch)
      status_printf_ln(s, color,
           _("You are currently splitting a commit while rebasing branch '%s' on '%s'."),
           s->state.branch,
           s->state.onto);
    else
      status_printf_ln(s, color,
           _("You are currently splitting a commit during a rebase."));
    if (s->hints)
      status_printf_ln(s, color,
        _("  (Once your working directory is clean, run \"git rebase --continue\")"));
  } else {
    if (s->state.branch)
      status_printf_ln(s, color,
           _("You are currently editing a commit while rebasing branch '%s' on '%s'."),
           s->state.branch,
           s->state.onto);
    else
      status_printf_ln(s, color,
           _("You are currently editing a commit during a rebase."));
    if (s->hints && !s->amend) {
      status_printf_ln(s, color,
        _("  (use \"git commit --amend\" to amend the current commit)"));
      status_printf_ln(s, color,
        _("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
    }
  }
  wt_longstatus_print_trailer(s);
}

static void show_cherry_pick_in_progress(struct wt_status *s,
           const char *color)
{
  if (is_null_oid(&s->state.cherry_pick_head_oid))
    status_printf_ln(s, color,
      _("Cherry-pick currently in progress."));
  else
    status_printf_ln(s, color,
      _("You are currently cherry-picking commit %s."),
      repo_find_unique_abbrev(s->repo, &s->state.cherry_pick_head_oid,
            DEFAULT_ABBREV));

  if (s->hints) {
    if (has_unmerged(s))
      status_printf_ln(s, color,
        _("  (fix conflicts and run \"git cherry-pick --continue\")"));
    else if (is_null_oid(&s->state.cherry_pick_head_oid))
      status_printf_ln(s, color,
        _("  (run \"git cherry-pick --continue\" to continue)"));
    else
      status_printf_ln(s, color,
        _("  (all conflicts fixed: run \"git cherry-pick --continue\")"));
    status_printf_ln(s, color,
      _("  (use \"git cherry-pick --skip\" to skip this patch)"));
    status_printf_ln(s, color,
      _("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
  }
  wt_longstatus_print_trailer(s);
}

static void show_revert_in_progress(struct wt_status *s,
            const char *color)
{
  if (is_null_oid(&s->state.revert_head_oid))
    status_printf_ln(s, color,
      _("Revert currently in progress."));
  else
    status_printf_ln(s, color,
      _("You are currently reverting commit %s."),
      repo_find_unique_abbrev(s->repo, &s->state.revert_head_oid,
            DEFAULT_ABBREV));
  if (s->hints) {
    if (has_unmerged(s))
      status_printf_ln(s, color,
        _("  (fix conflicts and run \"git revert --continue\")"));
    else if (is_null_oid(&s->state.revert_head_oid))
      status_printf_ln(s, color,
        _("  (run \"git revert --continue\" to continue)"));
    else
      status_printf_ln(s, color,
        _("  (all conflicts fixed: run \"git revert --continue\")"));
    status_printf_ln(s, color,
      _("  (use \"git revert --skip\" to skip this patch)"));
    status_printf_ln(s, color,
      _("  (use \"git revert --abort\" to cancel the revert operation)"));
  }
  wt_longstatus_print_trailer(s);
}

static void show_bisect_in_progress(struct wt_status *s,
            const char *color)
{
  if (s->state.bisecting_from)
    status_printf_ln(s, color,
         _("You are currently bisecting, started from branch '%s'."),
         s->state.bisecting_from);
  else
    status_printf_ln(s, color,
         _("You are currently bisecting."));
  if (s->hints)
    status_printf_ln(s, color,
      _("  (use \"git bisect reset\" to get back to the original branch)"));
  wt_longstatus_print_trailer(s);
}

static void show_sparse_checkout_in_use(struct wt_status *s,
          const char *color)
{
  if (s->state.sparse_checkout_percentage == SPARSE_CHECKOUT_DISABLED)
    return;

  if (s->state.sparse_checkout_percentage == SPARSE_CHECKOUT_SPARSE_INDEX)
    status_printf_ln(s, color, _("You are in a sparse checkout."));
  else
    status_printf_ln(s, color,
        _("You are in a sparse checkout with %d%% of tracked files present."),
        s->state.sparse_checkout_percentage);
  wt_longstatus_print_trailer(s);
}

/*
 * Extract branch information from rebase/bisect
 */
static char *get_branch(const struct worktree *wt, const char *path)
{
  struct strbuf sb = STRBUF_INIT;
  struct object_id oid;
  const char *branch_name;

  if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
    goto got_nothing;

  while (sb.len && sb.buf[sb.len - 1] == '\n')
    strbuf_setlen(&sb, sb.len - 1);
  if (!sb.len)
    goto got_nothing;
  if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
    strbuf_remove(&sb, 0, branch_name - sb.buf);
  else if (starts_with(sb.buf, "refs/"))
    ;
  else if (!get_oid_hex(sb.buf, &oid)) {
    strbuf_reset(&sb);
    strbuf_add_unique_abbrev(&sb, &oid, DEFAULT_ABBREV);
  } else if (!strcmp(sb.buf, "detached HEAD")) /* rebase */
    goto got_nothing;
  else      /* bisect */
    ;
  return strbuf_detach(&sb, NULL);

got_nothing:
  strbuf_release(&sb);
  return NULL;
}

struct grab_1st_switch_cbdata {
  struct strbuf buf;
  struct object_id noid;
};

static int grab_1st_switch(const char *refname UNUSED,
         struct object_id *ooid UNUSED,
         struct object_id *noid,
         const char *email UNUSED,
         timestamp_t timestamp UNUSED, int tz UNUSED,
         const char *message, void *cb_data)
{
  struct grab_1st_switch_cbdata *cb = cb_data;
  const char *target = NULL, *end;

  if (!skip_prefix(message, "checkout: moving from ", &message))
    return 0;
  target = strstr(message, " to ");
  if (!target)
    return 0;
  target += strlen(" to ");
  strbuf_reset(&cb->buf);
  oidcpy(&cb->noid, noid);
  end = strchrnul(target, '\n');
  strbuf_add(&cb->buf, target, end - target);
  if (!strcmp(cb->buf.buf, "HEAD")) {
    /* HEAD is relative. Resolve it to the right reflog entry. */
    strbuf_reset(&cb->buf);
    strbuf_add_unique_abbrev(&cb->buf, noid, DEFAULT_ABBREV);
  }
  return 1;
}

static void wt_status_get_detached_from(struct repository *r,
          struct wt_status_state *state)
{
  struct grab_1st_switch_cbdata cb;
  struct commit *commit;
  struct object_id oid;
  char *ref = NULL;

  strbuf_init(&cb.buf, 0);
  if (refs_for_each_reflog_ent_reverse(get_main_ref_store(r), "HEAD", grab_1st_switch, &cb) <= 0) {
    strbuf_release(&cb.buf);
    return;
  }

  if (repo_dwim_ref(r, cb.buf.buf, cb.buf.len, &oid, &ref,
        1) == 1 &&
      /* oid is a commit? match without further lookup */
      (oideq(&cb.noid, &oid) ||
       /* perhaps oid is a tag, try to dereference to a commit */
       ((commit = lookup_commit_reference_gently(r, &oid, 1)) != NULL &&
        oideq(&cb.noid, &commit->object.oid)))) {
    const char *from = ref;
    if (!skip_prefix(from, "refs/tags/", &from))
      skip_prefix(from, "refs/remotes/", &from);
    state->detached_from = xstrdup(from);
  } else
    state->detached_from =
      xstrdup(repo_find_unique_abbrev(r, &cb.noid, DEFAULT_ABBREV));
  oidcpy(&state->detached_oid, &cb.noid);
  state->detached_at = !repo_get_oid(r, "HEAD", &oid) &&
           oideq(&oid, &state->detached_oid);

  free(ref);
  strbuf_release(&cb.buf);
}

int wt_status_check_rebase(const struct worktree *wt,
         struct wt_status_state *state)
{
  struct stat st;

  if (!wt)
    BUG("wt_status_check_rebase() called with NULL worktree");

  if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
    if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
      state->am_in_progress = 1;
      if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
        state->am_empty_patch = 1;
    } else {
      state->rebase_in_progress = 1;
      state->branch = get_branch(wt, "rebase-apply/head-name");
      state->onto = get_branch(wt, "rebase-apply/onto");
    }
  } else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
    if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
      state->rebase_interactive_in_progress = 1;
    else
      state->rebase_in_progress = 1;
    state->branch = get_branch(wt, "rebase-merge/head-name");
    state->onto = get_branch(wt, "rebase-merge/onto");
  } else
    return 0;
  return 1;
}

int wt_status_check_bisect(const struct worktree *wt,
         struct wt_status_state *state)
{
  struct stat st;

  if (!wt)
    BUG("wt_status_check_bisect() called with NULL worktree");

  if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
    state->bisect_in_progress = 1;
    state->bisecting_from = get_branch(wt, "BISECT_START");
    return 1;
  }
  return 0;
}

static void wt_status_check_sparse_checkout(struct repository *r,
              struct wt_status_state *state)
{
  int skip_worktree = 0;
  int i;
  struct repo_config_values *cfg = repo_config_values(the_repository);

  if (!cfg->apply_sparse_checkout ||
      r->index->cache_nr == 0) {
    /*
     * Don't compute percentage of checked out files if we
     * aren't in a sparse checkout or would get division by 0.
     */
    state->sparse_checkout_percentage = SPARSE_CHECKOUT_DISABLED;
    return;
  }

  if (r->index->sparse_index) {
    state->sparse_checkout_percentage = SPARSE_CHECKOUT_SPARSE_INDEX;
    return;
  }

  for (i = 0; i < r->index->cache_nr; i++) {
    struct cache_entry *ce = r->index->cache[i];
    if (ce_skip_worktree(ce))
      skip_worktree++;
  }

  state->sparse_checkout_percentage =
    100 - (100 * skip_worktree)/r->index->cache_nr;
}

void wt_status_get_state(struct repository *r,
       struct wt_status_state *state,
       int get_detached_from)
{
  struct stat st;
  struct object_id oid;
  enum replay_action action;
  struct worktree *wt = get_current_worktree(r);

  if (!stat(git_path_merge_head(r), &st)) {
    wt_status_check_rebase(wt, state);
    state->merge_in_progress = 1;
  } else if (wt_status_check_rebase(wt, state)) {
    ;   /* all set */
  } else if (refs_ref_exists(get_main_ref_store(r), "CHERRY_PICK_HEAD") &&
       !repo_get_oid(r, "CHERRY_PICK_HEAD", &oid)) {
    state->cherry_pick_in_progress = 1;
    oidcpy(&state->cherry_pick_head_oid, &oid);
  }
  wt_status_check_bisect(wt, state);
  if (refs_ref_exists(get_main_ref_store(r), "REVERT_HEAD") &&
      !repo_get_oid(r, "REVERT_HEAD", &oid)) {
    state->revert_in_progress = 1;
    oidcpy(&state->revert_head_oid, &oid);
  }
  if (!sequencer_get_last_command(r, &action)) {
    if (action == REPLAY_PICK && !state->cherry_pick_in_progress) {
      state->cherry_pick_in_progress = 1;
      oidcpy(&state->cherry_pick_head_oid, null_oid(r->hash_algo));
    } else if (action == REPLAY_REVERT && !state->revert_in_progress) {
      state->revert_in_progress = 1;
      oidcpy(&state->revert_head_oid, null_oid(r->hash_algo));
    }
  }
  if (get_detached_from)
    wt_status_get_detached_from(r, state);
  wt_status_check_sparse_checkout(r, state);

  free_worktree(wt);
}

static void wt_longstatus_print_state(struct wt_status *s)
{
  const char *state_color = color(WT_STATUS_HEADER, s);
  struct wt_status_state *state = &s->state;

  if (state->merge_in_progress) {
    if (state->rebase_interactive_in_progress) {
      show_rebase_information(s, state_color);
      fputs("\n", s->fp);
    }
    show_merge_in_progress(s, state_color);
  } else if (state->am_in_progress)
    show_am_in_progress(s, state_color);
  else if (state->rebase_in_progress || state->rebase_interactive_in_progress)
    show_rebase_in_progress(s, state_color);
  else if (state->cherry_pick_in_progress)
    show_cherry_pick_in_progress(s, state_color);
  else if (state->revert_in_progress)
    show_revert_in_progress(s, state_color);
  if (state->bisect_in_progress)
    show_bisect_in_progress(s, state_color);

  if (state->sparse_checkout_percentage != SPARSE_CHECKOUT_DISABLED)
    show_sparse_checkout_in_use(s, state_color);
}

static void wt_longstatus_print(struct wt_status *s)
{
  const char *branch_color = color(WT_STATUS_ONBRANCH, s);
  const char *branch_status_color = color(WT_STATUS_HEADER, s);
  enum fsmonitor_mode fsm_mode = fsm_settings__get_mode(s->repo);

  if (s->branch) {
    const char *on_what = _("On branch ");
    const char *branch_name = s->branch;
    if (!strcmp(branch_name, "HEAD")) {
      branch_status_color = color(WT_STATUS_NOBRANCH, s);
      if (s->state.rebase_in_progress ||
          s->state.rebase_interactive_in_progress) {
        if (s->state.rebase_interactive_in_progress)
          on_what = _("interactive rebase in progress; onto ");
        else
          on_what = _("rebase in progress; onto ");
        branch_name = s->state.onto;
      } else if (s->state.detached_from) {
        branch_name = s->state.detached_from;
        if (s->state.detached_at)
          on_what = _("HEAD detached at ");
        else
          on_what = _("HEAD detached from ");
      } else {
        branch_name = "";
        on_what = _("Not currently on any branch.");
      }
    } else
      skip_prefix(branch_name, "refs/heads/", &branch_name);
    status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
    status_printf_more(s, branch_status_color, "%s", on_what);
    status_printf_more(s, branch_color, "%s\n", branch_name);
    if (!s->is_initial)
      wt_longstatus_print_tracking(s);
  }

  wt_longstatus_print_state(s);

  if (s->is_initial) {
    status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
    status_printf_ln(s, color(WT_STATUS_HEADER, s),
         s->commit_template
         ? _("Initial commit")
         : _("No commits yet"));
    status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
  }

  wt_longstatus_print_updated(s);
  wt_longstatus_print_unmerged(s);
  wt_longstatus_print_changed(s);
  if (s->submodule_summary &&
      (!s->ignore_submodule_arg ||
       strcmp(s->ignore_submodule_arg, "all"))) {
    wt_longstatus_print_submodule_summary(s, 0);  /* staged */
    wt_longstatus_print_submodule_summary(s, 1);  /* unstaged */
  }
  if (s->show_untracked_files) {
    wt_longstatus_print_other(s, &s->untracked, _("Untracked files"), "add");
    if (s->show_ignored_mode)
      wt_longstatus_print_other(s, &s->ignored, _("Ignored files"), "add -f");
    if (advice_enabled(ADVICE_STATUS_U_OPTION) && uf_was_slow(s)) {
      status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
      if (fsm_mode > FSMONITOR_MODE_DISABLED) {
        status_printf_ln(s, GIT_COLOR_NORMAL,
            _("It took %.2f seconds to enumerate untracked files,\n"
            "but the results were cached, and subsequent runs may be faster."),
            s->untracked_in_ms / 1000.0);
      } else {
        status_printf_ln(s, GIT_COLOR_NORMAL,
            _("It took %.2f seconds to enumerate untracked files."),
            s->untracked_in_ms / 1000.0);
      }
      status_printf_ln(s, GIT_COLOR_NORMAL,
          _("See 'git help status' for information on how to improve this."));
      status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
    }
  } else if (s->committable)
    status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
      s->hints
      ? _(" (use -u option to show untracked files)") : "");

  if (s->verbose)
    wt_longstatus_print_verbose(s);
  if (!s->committable) {
    if (s->amend)
      status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
    else if (s->nowarn)
      ; /* nothing */
    else if (s->workdir_dirty) {
      if (s->hints)
        fprintf(s->fp, _("no changes added to commit "
             "(use \"git add\" and/or "
             "\"git commit -a\")\n"));
      else
        fprintf(s->fp, _("no changes added to "
             "commit\n"));
    } else if (s->untracked.nr) {
      if (s->hints)
        fprintf(s->fp, _("nothing added to commit but "
             "untracked files present (use "
             "\"git add\" to track)\n"));
      else
        fprintf(s->fp, _("nothing added to commit but "
             "untracked files present\n"));
    } else if (s->is_initial) {
      if (s->hints)
        fprintf(s->fp, _("nothing to commit (create/"
             "copy files and use \"git "
             "add\" to track)\n"));
      else
        fprintf(s->fp, _("nothing to commit\n"));
    } else if (!s->show_untracked_files) {
      if (s->hints)
        fprintf(s->fp, _("nothing to commit (use -u to "
             "show untracked files)\n"));
      else
        fprintf(s->fp, _("nothing to commit\n"));
    } else
      fprintf(s->fp, _("nothing to commit, working tree "
           "clean\n"));
  }
  if(s->show_stash)
    wt_longstatus_print_stash_summary(s);
}

static void wt_shortstatus_unmerged(struct string_list_item *it,
         struct wt_status *s)
{
  struct wt_status_change_data *d = it->util;
  const char *how = "??";

  switch (d->stagemask) {
  case 1: how = "DD"; break; /* both deleted */
  case 2: how = "AU"; break; /* added by us */
  case 3: how = "UD"; break; /* deleted by them */
  case 4: how = "UA"; break; /* added by them */
  case 5: how = "DU"; break; /* deleted by us */
  case 6: how = "AA"; break; /* both added */
  case 7: how = "UU"; break; /* both modified */
  }
  color_fprintf(s->fp, color(WT_STATUS_UNMERGED, s), "%s", how);
  if (s->null_termination) {
    fprintf(s->fp, " %s%c", it->string, 0);
  } else {
    struct strbuf onebuf = STRBUF_INIT;
    const char *one;
    one = quote_path(it->string, s->prefix, &onebuf, QUOTE_PATH_QUOTE_SP);
    fprintf(s->fp, " %s\n", one);
    strbuf_release(&onebuf);
  }
}

static void wt_shortstatus_status(struct string_list_item *it,
       struct wt_status *s)
{
  struct wt_status_change_data *d = it->util;

  if (d->index_status)
    color_fprintf(s->fp, color(WT_STATUS_UPDATED, s), "%c", d->index_status);
  else
    fputc(' ', s->fp);
  if (d->worktree_status)
    color_fprintf(s->fp, color(WT_STATUS_CHANGED, s), "%c", d->worktree_status);
  else
    fputc(' ', s->fp);
  fputc(' ', s->fp);
  if (s->null_termination) {
    fprintf(s->fp, "%s%c", it->string, 0);
    if (d->rename_source)
      fprintf(s->fp, "%s%c", d->rename_source, 0);
  } else {
    struct strbuf onebuf = STRBUF_INIT;
    const char *one;

    if (d->rename_source) {
      one = quote_path(d->rename_source, s->prefix, &onebuf,
           QUOTE_PATH_QUOTE_SP);
      fprintf(s->fp, "%s -> ", one);
      strbuf_release(&onebuf);
    }
    one = quote_path(it->string, s->prefix, &onebuf, QUOTE_PATH_QUOTE_SP);
    fprintf(s->fp, "%s\n", one);
    strbuf_release(&onebuf);
  }
}

static void wt_shortstatus_other(struct string_list_item *it,
         struct wt_status *s, const char *sign)
{
  color_fprintf(s->fp, color(WT_STATUS_UNTRACKED, s), "%s", sign);
  if (s->null_termination) {
    fprintf(s->fp, " %s%c", it->string, 0);
  } else {
    struct strbuf onebuf = STRBUF_INIT;
    const char *one;
    one = quote_path(it->string, s->prefix, &onebuf, QUOTE_PATH_QUOTE_SP);
    fprintf(s->fp, " %s\n", one);
    strbuf_release(&onebuf);
  }
}

static void wt_shortstatus_print_tracking(struct wt_status *s)
{
  struct branch *branch;
  const char *header_color = color(WT_STATUS_HEADER, s);
  const char *branch_color_local = color(WT_STATUS_LOCAL_BRANCH, s);
  const char *branch_color_remote = color(WT_STATUS_REMOTE_BRANCH, s);

  const char *base;
  char *short_base;
  const char *branch_name;
  int num_ours, num_theirs, sti;
  int upstream_is_gone = 0;

  color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "## ");

  if (!s->branch)
    return;
  branch_name = s->branch;

#define LABEL(string) (s->no_gettext ? (string) : _(string))

  if (s->is_initial)
    color_fprintf(s->fp, header_color, LABEL(N_("No commits yet on ")));

  if (!strcmp(s->branch, "HEAD")) {
    color_fprintf(s->fp, color(WT_STATUS_NOBRANCH, s), "%s",
            LABEL(N_("HEAD (no branch)")));
    goto conclude;
  }

  skip_prefix(branch_name, "refs/heads/", &branch_name);

  branch = branch_get(branch_name);

  color_fprintf(s->fp, branch_color_local, "%s", branch_name);

  sti = stat_tracking_info(branch, &num_ours, &num_theirs, &base,
         0, s->ahead_behind_flags);
  if (sti < 0) {
    if (!base)
      goto conclude;

    upstream_is_gone = 1;
  }

  short_base = refs_shorten_unambiguous_ref(get_main_ref_store(s->repo),
              base, 0);
  color_fprintf(s->fp, header_color, "...");
  color_fprintf(s->fp, branch_color_remote, "%s", short_base);
  free(short_base);

  if (!upstream_is_gone && !sti)
    goto conclude;

  color_fprintf(s->fp, header_color, " [");
  if (upstream_is_gone) {
    color_fprintf(s->fp, header_color, LABEL(N_("gone")));
  } else if (s->ahead_behind_flags == AHEAD_BEHIND_QUICK) {
    color_fprintf(s->fp, header_color, LABEL(N_("different")));
  } else if (!num_ours) {
    color_fprintf(s->fp, header_color, LABEL(N_("behind ")));
    color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
  } else if (!num_theirs) {
    color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
    color_fprintf(s->fp, branch_color_local, "%d", num_ours);
  } else {
    color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
    color_fprintf(s->fp, branch_color_local, "%d", num_ours);
    color_fprintf(s->fp, header_color, ", %s", LABEL(N_("behind ")));
    color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
  }

  color_fprintf(s->fp, header_color, "]");
 conclude:
  fputc(s->null_termination ? '\0' : '\n', s->fp);
}

static void wt_shortstatus_print(struct wt_status *s)
{
  struct string_list_item *it;

  if (s->show_branch)
    wt_shortstatus_print_tracking(s);

  for_each_string_list_item(it, &s->change) {
    struct wt_status_change_data *d = it->util;

    if (d->stagemask)
      wt_shortstatus_unmerged(it, s);
    else
      wt_shortstatus_status(it, s);
  }
  for_each_string_list_item(it, &s->untracked)
    wt_shortstatus_other(it, s, "??");

  for_each_string_list_item(it, &s->ignored)
    wt_shortstatus_other(it, s, "!!");
}

static void wt_porcelain_print(struct wt_status *s)
{
  s->use_color = GIT_COLOR_NEVER;
  s->relative_paths = 0;
  s->prefix = NULL;
  s->no_gettext = 1;
  wt_shortstatus_print(s);
}

/*
 * Print branch information for porcelain v2 output.  These lines
 * are printed when the '--branch' parameter is given.
 *
 *    # branch.oid <commit><eol>
 *    # branch.head <head><eol>
 *   [# branch.upstream <upstream><eol>
 *   [# branch.ab +<ahead> -<behind><eol>]]
 *
 *      <commit> ::= the current commit hash or the literal
 *                   "(initial)" to indicate an initialized repo
 *                   with no commits.
 *
 *        <head> ::= <branch_name> the current branch name or
 *                   "(detached)" literal when detached head or
 *                   "(unknown)" when something is wrong.
 *
 *    <upstream> ::= the upstream branch name, when set.
 *
 *       <ahead> ::= integer ahead value or '?'.
 *
 *      <behind> ::= integer behind value or '?'.
 *
 * The end-of-line is defined by the -z flag.
 *
 *                 <eol> ::= NUL when -z,
 *                           LF when NOT -z.
 *
 * When an upstream is set and present, the 'branch.ab' line will
 * be printed with the ahead/behind counts for the branch and the
 * upstream.  When AHEAD_BEHIND_QUICK is requested and the branches
 * are different, '?' will be substituted for the actual count.
 */
static void wt_porcelain_v2_print_tracking(struct wt_status *s)
{
  struct branch *branch;
  const char *base;
  const char *branch_name;
  int ab_info, nr_ahead, nr_behind;
  char eol = s->null_termination ? '\0' : '\n';

  fprintf(s->fp, "# branch.oid %s%c",
      (s->is_initial ? "(initial)" : oid_to_hex(&s->oid_commit)),
      eol);

  if (!s->branch)
    fprintf(s->fp, "# branch.head %s%c", "(unknown)", eol);
  else {
    if (!strcmp(s->branch, "HEAD")) {
      fprintf(s->fp, "# branch.head %s%c", "(detached)", eol);

      if (s->state.rebase_in_progress ||
          s->state.rebase_interactive_in_progress)
        branch_name = s->state.onto;
      else if (s->state.detached_from)
        branch_name = s->state.detached_from;
      else
        branch_name = "";
    } else {
      branch_name = NULL;
      skip_prefix(s->branch, "refs/heads/", &branch_name);

      fprintf(s->fp, "# branch.head %s%c", branch_name, eol);
    }

    /* Lookup stats on the upstream tracking branch, if set. */
    branch = branch_get(branch_name);
    base = NULL;
    ab_info = stat_tracking_info(branch, &nr_ahead, &nr_behind,
               &base, 0, s->ahead_behind_flags);
    if (base) {
      base = refs_shorten_unambiguous_ref(get_main_ref_store(s->repo),
                  base, 0);
      fprintf(s->fp, "# branch.upstream %s%c", base, eol);
      free((char *)base);

      if (ab_info > 0) {
        /* different */
        if (nr_ahead || nr_behind)
          fprintf(s->fp, "# branch.ab +%d -%d%c",
            nr_ahead, nr_behind, eol);
        else
          fprintf(s->fp, "# branch.ab +? -?%c",
            eol);
      } else if (!ab_info) {
        /* same */
        fprintf(s->fp, "# branch.ab +0 -0%c", eol);
      }
    }
  }
}

/*
 * Print the stash count in a porcelain-friendly format
 */
static void wt_porcelain_v2_print_stash(struct wt_status *s)
{
  int stash_count = count_stash_entries(s->repo);
  char eol = s->null_termination ? '\0' : '\n';

  if (stash_count > 0)
    fprintf(s->fp, "# stash %d%c", stash_count, eol);
}

/*
 * Convert various submodule status values into a
 * fixed-length string of characters in the buffer provided.
 */
static void wt_porcelain_v2_submodule_state(
  struct wt_status_change_data *d,
  char sub[5])
{
  if (S_ISGITLINK(d->mode_head) ||
    S_ISGITLINK(d->mode_index) ||
    S_ISGITLINK(d->mode_worktree)) {
    sub[0] = 'S';
    sub[1] = d->new_submodule_commits ? 'C' : '.';
    sub[2] = (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED) ? 'M' : '.';
    sub[3] = (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ? 'U' : '.';
  } else {
    sub[0] = 'N';
    sub[1] = '.';
    sub[2] = '.';
    sub[3] = '.';
  }
  sub[4] = 0;
}

/*
 * Fix-up changed entries before we print them.
 */
static void wt_porcelain_v2_fix_up_changed(struct string_list_item *it)
{
  struct wt_status_change_data *d = it->util;

  if (!d->index_status) {
    /*
     * This entry is unchanged in the index (relative to the head).
     * Therefore, the collect_updated_cb was never called for this
     * entry (during the head-vs-index scan) and so the head column
     * fields were never set.
     *
     * We must have data for the index column (from the
     * index-vs-worktree scan (otherwise, this entry should not be
     * in the list of changes)).
     *
     * Copy index column fields to the head column, so that our
     * output looks complete.
     */
    assert(d->mode_head == 0);
    d->mode_head = d->mode_index;
    oidcpy(&d->oid_head, &d->oid_index);
  }

  if (!d->worktree_status) {
    /*
     * This entry is unchanged in the worktree (relative to the index).
     * Therefore, the collect_changed_cb was never called for this entry
     * (during the index-vs-worktree scan) and so the worktree column
     * fields were never set.
     *
     * We must have data for the index column (from the head-vs-index
     * scan).
     *
     * Copy the index column fields to the worktree column so that
     * our output looks complete.
     *
     * Note that we only have a mode field in the worktree column
     * because the scan code tries really hard to not have to compute it.
     */
    assert(d->mode_worktree == 0);
    d->mode_worktree = d->mode_index;
  }
}

/*
 * Print porcelain v2 info for tracked entries with changes.
 */
static void wt_porcelain_v2_print_changed_entry(
  struct string_list_item *it,
  struct wt_status *s)
{
  struct wt_status_change_data *d = it->util;
  struct strbuf buf = STRBUF_INIT;
  struct strbuf buf_from = STRBUF_INIT;
  const char *path = NULL;
  const char *path_from = NULL;
  char key[3];
  char submodule_token[5];
  char sep_char, eol_char;

  wt_porcelain_v2_fix_up_changed(it);
  wt_porcelain_v2_submodule_state(d, submodule_token);

  key[0] = d->index_status ? d->index_status : '.';
  key[1] = d->worktree_status ? d->worktree_status : '.';
  key[2] = 0;

  if (s->null_termination) {
    /*
     * In -z mode, we DO NOT C-quote pathnames.  Current path is ALWAYS first.
     * A single NUL character separates them.
     */
    sep_char = '\0';
    eol_char = '\0';
    path = it->string;
    path_from = d->rename_source;
  } else {
    /*
     * Path(s) are C-quoted if necessary. Current path is ALWAYS first.
     * The source path is only present when necessary.
     * A single TAB separates them (because paths can contain spaces
     * which are not escaped and C-quoting does escape TAB characters).
     */
    sep_char = '\t';
    eol_char = '\n';
    path = quote_path(it->string, s->prefix, &buf, 0);
    if (d->rename_source)
      path_from = quote_path(d->rename_source, s->prefix, &buf_from, 0);
  }

  if (path_from)
    fprintf(s->fp, "2 %s %s %06o %06o %06o %s %s %c%d %s%c%s%c",
        key, submodule_token,
        d->mode_head, d->mode_index, d->mode_worktree,
        oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
        d->rename_status, d->rename_score,
        path, sep_char, path_from, eol_char);
  else
    fprintf(s->fp, "1 %s %s %06o %06o %06o %s %s %s%c",
        key, submodule_token,
        d->mode_head, d->mode_index, d->mode_worktree,
        oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
        path, eol_char);

  strbuf_release(&buf);
  strbuf_release(&buf_from);
}

/*
 * Print porcelain v2 status info for unmerged entries.
 */
static void wt_porcelain_v2_print_unmerged_entry(
  struct string_list_item *it,
  struct wt_status *s)
{
  struct wt_status_change_data *d = it->util;
  struct index_state *istate = s->repo->index;
  const struct cache_entry *ce;
  struct strbuf buf_index = STRBUF_INIT;
  const char *path_index = NULL;
  int pos, stage, sum;
  struct {
    int mode;
    struct object_id oid;
  } stages[3];
  const char *key;
  char submodule_token[5];
  char unmerged_prefix = 'u';
  char eol_char = s->null_termination ? '\0' : '\n';

  wt_porcelain_v2_submodule_state(d, submodule_token);

  switch (d->stagemask) {
  case 1: key = "DD"; break; /* both deleted */
  case 2: key = "AU"; break; /* added by us */
  case 3: key = "UD"; break; /* deleted by them */
  case 4: key = "UA"; break; /* added by them */
  case 5: key = "DU"; break; /* deleted by us */
  case 6: key = "AA"; break; /* both added */
  case 7: key = "UU"; break; /* both modified */
  default:
    BUG("unhandled unmerged status %x", d->stagemask);
  }

  /*
   * Disregard d.aux.porcelain_v2 data that we accumulated
   * for the head and index columns during the scans and
   * replace with the actual stage data.
   *
   * Note that this is a last-one-wins for each the individual
   * stage [123] columns in the event of multiple cache entries
   * for same stage.
   */
  memset(stages, 0, sizeof(stages));
  sum = 0;
  pos = index_name_pos(istate, it->string, strlen(it->string));
  assert(pos < 0);
  pos = -pos-1;
  while (pos < istate->cache_nr) {
    ce = istate->cache[pos++];
    stage = ce_stage(ce);
    if (strcmp(ce->name, it->string) || !stage)
      break;
    stages[stage - 1].mode = ce->ce_mode;
    oidcpy(&stages[stage - 1].oid, &ce->oid);
    sum |= (1 << (stage - 1));
  }
  if (sum != d->stagemask)
    BUG("observed stagemask 0x%x != expected stagemask 0x%x", sum, d->stagemask);

  if (s->null_termination)
    path_index = it->string;
  else
    path_index = quote_path(it->string, s->prefix, &buf_index, 0);

  fprintf(s->fp, "%c %s %s %06o %06o %06o %06o %s %s %s %s%c",
      unmerged_prefix, key, submodule_token,
      stages[0].mode, /* stage 1 */
      stages[1].mode, /* stage 2 */
      stages[2].mode, /* stage 3 */
      d->mode_worktree,
      oid_to_hex(&stages[0].oid), /* stage 1 */
      oid_to_hex(&stages[1].oid), /* stage 2 */
      oid_to_hex(&stages[2].oid), /* stage 3 */
      path_index,
      eol_char);

  strbuf_release(&buf_index);
}

/*
 * Print porcelain V2 status info for untracked and ignored entries.
 */
static void wt_porcelain_v2_print_other(
  struct string_list_item *it,
  struct wt_status *s,
  char prefix)
{
  struct strbuf buf = STRBUF_INIT;
  const char *path;
  char eol_char;

  if (s->null_termination) {
    path = it->string;
    eol_char = '\0';
  } else {
    path = quote_path(it->string, s->prefix, &buf, 0);
    eol_char = '\n';
  }

  fprintf(s->fp, "%c %s%c", prefix, path, eol_char);

  strbuf_release(&buf);
}

/*
 * Print porcelain V2 status.
 *
 * [<v2_branch>]
 * [<v2_changed_items>]*
 * [<v2_unmerged_items>]*
 * [<v2_untracked_items>]*
 * [<v2_ignored_items>]*
 *
 */
static void wt_porcelain_v2_print(struct wt_status *s)
{
  struct wt_status_change_data *d;
  struct string_list_item *it;
  int i;

  if (s->show_branch)
    wt_porcelain_v2_print_tracking(s);

  if (s->show_stash)
    wt_porcelain_v2_print_stash(s);

  for (i = 0; i < s->change.nr; i++) {
    it = &(s->change.items[i]);
    d = it->util;
    if (!d->stagemask)
      wt_porcelain_v2_print_changed_entry(it, s);
  }

  for (i = 0; i < s->change.nr; i++) {
    it = &(s->change.items[i]);
    d = it->util;
    if (d->stagemask)
      wt_porcelain_v2_print_unmerged_entry(it, s);
  }

  for (i = 0; i < s->untracked.nr; i++) {
    it = &(s->untracked.items[i]);
    wt_porcelain_v2_print_other(it, s, '?');
  }

  for (i = 0; i < s->ignored.nr; i++) {
    it = &(s->ignored.items[i]);
    wt_porcelain_v2_print_other(it, s, '!');
  }
}

void wt_status_print(struct wt_status *s)
{
  trace2_data_intmax("status", s->repo, "count/changed", s->change.nr);
  trace2_data_intmax("status", s->repo, "count/untracked",
         s->untracked.nr);
  trace2_data_intmax("status", s->repo, "count/ignored", s->ignored.nr);

  trace2_region_enter("status", "print", s->repo);

  switch (s->status_format) {
  case STATUS_FORMAT_SHORT:
    wt_shortstatus_print(s);
    break;
  case STATUS_FORMAT_PORCELAIN:
    wt_porcelain_print(s);
    break;
  case STATUS_FORMAT_PORCELAIN_V2:
    wt_porcelain_v2_print(s);
    break;
  case STATUS_FORMAT_UNSPECIFIED:
    BUG("finalize_deferred_config() should have been called");
    break;
  case STATUS_FORMAT_NONE:
  case STATUS_FORMAT_LONG:
    wt_longstatus_print(s);
    break;
  }

  trace2_region_leave("status", "print", s->repo);
}

/**
 * Returns 1 if there are unstaged changes, 0 otherwise.
 */
int has_unstaged_changes(struct repository *r, int ignore_submodules)
{
  struct rev_info rev_info;
  int result;

  repo_init_revisions(r, &rev_info, NULL);
  if (ignore_submodules) {
    rev_info.diffopt.flags.ignore_submodules = 1;
    rev_info.diffopt.flags.override_submodule_config = 1;
  }
  rev_info.diffopt.flags.quick = 1;
  diff_setup_done(&rev_info.diffopt);
  run_diff_files(&rev_info, 0);
  result = diff_result_code(&rev_info);
  release_revisions(&rev_info);
  return result;
}

/**
 * Returns 1 if there are uncommitted changes, 0 otherwise.
 */
int has_uncommitted_changes(struct repository *r,
          int ignore_submodules)
{
  struct rev_info rev_info;
  int result;

  if (is_index_unborn(r->index))
    return 0;

  repo_init_revisions(r, &rev_info, NULL);
  if (ignore_submodules)
    rev_info.diffopt.flags.ignore_submodules = 1;
  rev_info.diffopt.flags.quick = 1;

  add_head_to_pending(&rev_info);
  if (!rev_info.pending.nr) {
    /*
     * We have no head (or it's corrupt); use the empty tree,
     * which will complain if the index is non-empty.
     */
    struct tree *tree = lookup_tree(r, r->hash_algo->empty_tree);
    add_pending_object(&rev_info, &tree->object, "");
  }

  diff_setup_done(&rev_info.diffopt);
  run_diff_index(&rev_info, DIFF_INDEX_CACHED);
  result = diff_result_code(&rev_info);
  release_revisions(&rev_info);
  return result;
}

/**
 * If the work tree has unstaged or uncommitted changes, dies with the
 * appropriate message.
 */
int require_clean_work_tree(struct repository *r,
          const char *action,
          const char *hint,
          int ignore_submodules,
          int gently)
{
  struct lock_file lock_file = LOCK_INIT;
  int err = 0, fd;

  fd = repo_hold_locked_index(r, &lock_file, 0);
  refresh_index(r->index, REFRESH_QUIET, NULL, NULL, NULL);
  if (0 <= fd)
    repo_update_index_if_able(r, &lock_file);
  rollback_lock_file(&lock_file);

  if (has_unstaged_changes(r, ignore_submodules)) {
    /* TRANSLATORS: the action is e.g. "pull with rebase" */
    error(_("cannot %s: You have unstaged changes."), _(action));
    err = 1;
  }

  if (has_uncommitted_changes(r, ignore_submodules)) {
    if (err)
      error(_("additionally, your index contains uncommitted changes."));
    else
      error(_("cannot %s: Your index contains uncommitted changes."),
            _(action));
    err = 1;
  }

  if (err) {
    if (hint) {
      if (!*hint)
        BUG("empty hint passed to require_clean_work_tree();"
            " use NULL instead");
      error("%s", hint);
    }
    if (!gently)
      exit(128);
  }

  return err;
}

Coverage Report

Created: 2026-10-17 07:15