/src/git/builtin/show-branch.c

Source (jump to first uncovered line)
#include "builtin.h"
#include "config.h"
#include "environment.h"
#include "gettext.h"
#include "hash.h"
#include "hex.h"
#include "pretty.h"
#include "refs.h"
#include "color.h"
#include "strvec.h"
#include "object-name.h"
#include "parse-options.h"
#include "repository.h"
#include "dir.h"
#include "commit-slab.h"
#include "date.h"
#include "wildmatch.h"

static const char* show_branch_usage[] = {
    N_("git show-branch [-a | --all] [-r | --remotes] [--topo-order | --date-order]\n"
       "                [--current] [--color[=<when>] | --no-color] [--sparse]\n"
       "                [--more=<n> | --list | --independent | --merge-base]\n"
       "                [--no-name | --sha1-name] [--topics]\n"
       "                [(<rev> | <glob>)...]"),
    N_("git show-branch (-g | --reflog)[=<n>[,<base>]] [--list] [<ref>]"),
    NULL
};

static int showbranch_use_color = -1;

static struct strvec default_args = STRVEC_INIT;

/*
 * TODO: convert this use of commit->object.flags to commit-slab
 * instead to store a pointer to ref name directly. Then use the same
 * UNINTERESTING definition from revision.h here.
 */
#define UNINTERESTING 01

#define REV_SHIFT  2
#define MAX_REVS  (FLAG_BITS - REV_SHIFT) /* should not exceed bits_per_int - REV_SHIFT */

#define DEFAULT_REFLOG  4

static const char *get_color_code(int idx)
{
  if (want_color(showbranch_use_color))
    return column_colors_ansi[idx % column_colors_ansi_max];
  return "";
}

static const char *get_color_reset_code(void)
{
  if (want_color(showbranch_use_color))
    return GIT_COLOR_RESET;
  return "";
}

static struct commit *interesting(struct commit_list *list)
{
  while (list) {
    struct commit *commit = list->item;
    list = list->next;
    if (commit->object.flags & UNINTERESTING)
      continue;
    return commit;
  }
  return NULL;
}

struct commit_name {
  const char *head_name; /* which head's ancestor? */
  int generation; /* how many parents away from head_name */
};

define_commit_slab(commit_name_slab, struct commit_name *);
static struct commit_name_slab name_slab;

static struct commit_name *commit_to_name(struct commit *commit)
{
  return *commit_name_slab_at(&name_slab, commit);
}


/* Name the commit as nth generation ancestor of head_name;
 * we count only the first-parent relationship for naming purposes.
 */
static void name_commit(struct commit *commit, const char *head_name, int nth)
{
  struct commit_name *name;

  name = *commit_name_slab_at(&name_slab, commit);
  if (!name) {
    name = xmalloc(sizeof(*name));
    *commit_name_slab_at(&name_slab, commit) = name;
  }
  name->head_name = head_name;
  name->generation = nth;
}

/* Parent is the first parent of the commit.  We may name it
 * as (n+1)th generation ancestor of the same head_name as
 * commit is nth generation ancestor of, if that generation
 * number is better than the name it already has.
 */
static void name_parent(struct commit *commit, struct commit *parent)
{
  struct commit_name *commit_name = commit_to_name(commit);
  struct commit_name *parent_name = commit_to_name(parent);
  if (!commit_name)
    return;
  if (!parent_name ||
      commit_name->generation + 1 < parent_name->generation)
    name_commit(parent, commit_name->head_name,
          commit_name->generation + 1);
}

static int name_first_parent_chain(struct commit *c)
{
  int i = 0;
  while (c) {
    struct commit *p;
    if (!commit_to_name(c))
      break;
    if (!c->parents)
      break;
    p = c->parents->item;
    if (!commit_to_name(p)) {
      name_parent(c, p);
      i++;
    }
    else
      break;
    c = p;
  }
  return i;
}

static void name_commits(struct commit_list *list,
       struct commit **rev,
       char **ref_name,
       int num_rev)
{
  struct commit_list *cl;
  struct commit *c;
  int i;

  /* First give names to the given heads */
  for (cl = list; cl; cl = cl->next) {
    c = cl->item;
    if (commit_to_name(c))
      continue;
    for (i = 0; i < num_rev; i++) {
      if (rev[i] == c) {
        name_commit(c, ref_name[i], 0);
        break;
      }
    }
  }

  /* Then commits on the first parent ancestry chain */
  do {
    i = 0;
    for (cl = list; cl; cl = cl->next) {
      i += name_first_parent_chain(cl->item);
    }
  } while (i);

  /* Finally, any unnamed commits */
  do {
    i = 0;
    for (cl = list; cl; cl = cl->next) {
      struct commit_list *parents;
      struct commit_name *n;
      int nth;
      c = cl->item;
      if (!commit_to_name(c))
        continue;
      n = commit_to_name(c);
      parents = c->parents;
      nth = 0;
      while (parents) {
        struct commit *p = parents->item;
        struct strbuf newname = STRBUF_INIT;
        parents = parents->next;
        nth++;
        if (commit_to_name(p))
          continue;
        switch (n->generation) {
        case 0:
          strbuf_addstr(&newname, n->head_name);
          break;
        case 1:
          strbuf_addf(&newname, "%s^", n->head_name);
          break;
        default:
          strbuf_addf(&newname, "%s~%d",
                n->head_name, n->generation);
          break;
        }
        if (nth == 1)
          strbuf_addch(&newname, '^');
        else
          strbuf_addf(&newname, "^%d", nth);
        name_commit(p, strbuf_detach(&newname, NULL), 0);
        i++;
        name_first_parent_chain(p);
      }
    }
  } while (i);
}

static int mark_seen(struct commit *commit, struct commit_list **seen_p)
{
  if (!commit->object.flags) {
    commit_list_insert(commit, seen_p);
    return 1;
  }
  return 0;
}

static void join_revs(struct commit_list **list_p,
          struct commit_list **seen_p,
          int num_rev, int extra)
{
  int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
  int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);

  while (*list_p) {
    struct commit_list *parents;
    int still_interesting = !!interesting(*list_p);
    struct commit *commit = pop_commit(list_p);
    int flags = commit->object.flags & all_mask;

    if (!still_interesting && extra <= 0)
      break;

    mark_seen(commit, seen_p);
    if ((flags & all_revs) == all_revs)
      flags |= UNINTERESTING;
    parents = commit->parents;

    while (parents) {
      struct commit *p = parents->item;
      int this_flag = p->object.flags;
      parents = parents->next;
      if ((this_flag & flags) == flags)
        continue;
      repo_parse_commit(the_repository, p);
      if (mark_seen(p, seen_p) && !still_interesting)
        extra--;
      p->object.flags |= flags;
      commit_list_insert_by_date(p, list_p);
    }
  }

  /*
   * Postprocess to complete well-poisoning.
   *
   * At this point we have all the commits we have seen in
   * seen_p list.  Mark anything that can be reached from
   * uninteresting commits not interesting.
   */
  for (;;) {
    int changed = 0;
    struct commit_list *s;
    for (s = *seen_p; s; s = s->next) {
      struct commit *c = s->item;
      struct commit_list *parents;

      if (((c->object.flags & all_revs) != all_revs) &&
          !(c->object.flags & UNINTERESTING))
        continue;

      /* The current commit is either a merge base or
       * already uninteresting one.  Mark its parents
       * as uninteresting commits _only_ if they are
       * already parsed.  No reason to find new ones
       * here.
       */
      parents = c->parents;
      while (parents) {
        struct commit *p = parents->item;
        parents = parents->next;
        if (!(p->object.flags & UNINTERESTING)) {
          p->object.flags |= UNINTERESTING;
          changed = 1;
        }
      }
    }
    if (!changed)
      break;
  }
}

static void show_one_commit(struct commit *commit, int no_name)
{
  struct strbuf pretty = STRBUF_INIT;
  const char *pretty_str = "(unavailable)";
  struct commit_name *name = commit_to_name(commit);

  if (commit->object.parsed) {
    pp_commit_easy(CMIT_FMT_ONELINE, commit, &pretty);
    pretty_str = pretty.buf;
  }
  skip_prefix(pretty_str, "[PATCH] ", &pretty_str);

  if (!no_name) {
    if (name && name->head_name) {
      printf("[%s", name->head_name);
      if (name->generation) {
        if (name->generation == 1)
          printf("^");
        else
          printf("~%d", name->generation);
      }
      printf("] ");
    }
    else
      printf("[%s] ",
             repo_find_unique_abbrev(the_repository, &commit->object.oid,
                   DEFAULT_ABBREV));
  }
  puts(pretty_str);
  strbuf_release(&pretty);
}

static char *ref_name[MAX_REVS + 1];
static int ref_name_cnt;

static const char *find_digit_prefix(const char *s, int *v)
{
  const char *p;
  int ver;
  char ch;

  for (p = s, ver = 0;
       '0' <= (ch = *p) && ch <= '9';
       p++)
    ver = ver * 10 + ch - '0';
  *v = ver;
  return p;
}


static int version_cmp(const char *a, const char *b)
{
  while (1) {
    int va, vb;

    a = find_digit_prefix(a, &va);
    b = find_digit_prefix(b, &vb);
    if (va != vb)
      return va - vb;

    while (1) {
      int ca = *a;
      int cb = *b;
      if ('0' <= ca && ca <= '9')
        ca = 0;
      if ('0' <= cb && cb <= '9')
        cb = 0;
      if (ca != cb)
        return ca - cb;
      if (!ca)
        break;
      a++;
      b++;
    }
    if (!*a && !*b)
      return 0;
  }
}

static int compare_ref_name(const void *a_, const void *b_)
{
  const char * const*a = a_, * const*b = b_;
  return version_cmp(*a, *b);
}

static void sort_ref_range(int bottom, int top)
{
  QSORT(ref_name + bottom, top - bottom, compare_ref_name);
}

static int append_ref(const char *refname, const struct object_id *oid,
          int allow_dups)
{
  struct commit *commit = lookup_commit_reference_gently(the_repository,
                     oid, 1);
  int i;

  if (!commit)
    return 0;

  if (!allow_dups) {
    /* Avoid adding the same thing twice */
    for (i = 0; i < ref_name_cnt; i++)
      if (!strcmp(refname, ref_name[i]))
        return 0;
  }
  if (MAX_REVS <= ref_name_cnt) {
    warning(Q_("ignoring %s; cannot handle more than %d ref",
         "ignoring %s; cannot handle more than %d refs",
         MAX_REVS), refname, MAX_REVS);
    return 0;
  }
  ref_name[ref_name_cnt++] = xstrdup(refname);
  ref_name[ref_name_cnt] = NULL;
  return 0;
}

static int append_head_ref(const char *refname, const char *referent UNUSED, const struct object_id *oid,
         int flag UNUSED, void *cb_data UNUSED)
{
  struct object_id tmp;
  int ofs = 11;
  if (!starts_with(refname, "refs/heads/"))
    return 0;
  /* If both heads/foo and tags/foo exists, get_sha1 would
   * get confused.
   */
  if (repo_get_oid(the_repository, refname + ofs, &tmp) || !oideq(&tmp, oid))
    ofs = 5;
  return append_ref(refname + ofs, oid, 0);
}

static int append_remote_ref(const char *refname, const char *referent UNUSED, const struct object_id *oid,
           int flag UNUSED, void *cb_data UNUSED)
{
  struct object_id tmp;
  int ofs = 13;
  if (!starts_with(refname, "refs/remotes/"))
    return 0;
  /* If both heads/foo and tags/foo exists, get_sha1 would
   * get confused.
   */
  if (repo_get_oid(the_repository, refname + ofs, &tmp) || !oideq(&tmp, oid))
    ofs = 5;
  return append_ref(refname + ofs, oid, 0);
}

static int append_tag_ref(const char *refname, const struct object_id *oid,
        int flag UNUSED, void *cb_data UNUSED)
{
  if (!starts_with(refname, "refs/tags/"))
    return 0;
  return append_ref(refname + 5, oid, 0);
}

static const char *match_ref_pattern = NULL;
static int match_ref_slash = 0;

static int append_matching_ref(const char *refname, const char *referent UNUSED, const struct object_id *oid,
             int flag, void *cb_data)
{
  /* we want to allow pattern hold/<asterisk> to show all
   * branches under refs/heads/hold/, and v0.99.9? to show
   * refs/tags/v0.99.9a and friends.
   */
  const char *tail;
  int slash = count_slashes(refname);
  for (tail = refname; *tail && match_ref_slash < slash; )
    if (*tail++ == '/')
      slash--;
  if (!*tail)
    return 0;
  if (wildmatch(match_ref_pattern, tail, 0))
    return 0;
  if (starts_with(refname, "refs/heads/"))
    return append_head_ref(refname, NULL, oid, flag, cb_data);
  if (starts_with(refname, "refs/tags/"))
    return append_tag_ref(refname, oid, flag, cb_data);
  return append_ref(refname, oid, 0);
}

static void snarf_refs(int head, int remotes)
{
  if (head) {
    int orig_cnt = ref_name_cnt;

    refs_for_each_ref(get_main_ref_store(the_repository),
          append_head_ref, NULL);
    sort_ref_range(orig_cnt, ref_name_cnt);
  }
  if (remotes) {
    int orig_cnt = ref_name_cnt;

    refs_for_each_ref(get_main_ref_store(the_repository),
          append_remote_ref, NULL);
    sort_ref_range(orig_cnt, ref_name_cnt);
  }
}

static int rev_is_head(const char *head, const char *name)
{
  if (!head)
    return 0;
  skip_prefix(head, "refs/heads/", &head);
  if (!skip_prefix(name, "refs/heads/", &name))
    skip_prefix(name, "heads/", &name);
  return !strcmp(head, name);
}

static int show_merge_base(const struct commit_list *seen, int num_rev)
{
  int all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
  int all_revs = all_mask & ~((1u << REV_SHIFT) - 1);
  int exit_status = 1;

  for (const struct commit_list *s = seen; s; s = s->next) {
    struct commit *commit = s->item;
    int flags = commit->object.flags & all_mask;
    if (!(flags & UNINTERESTING) &&
        ((flags & all_revs) == all_revs)) {
      puts(oid_to_hex(&commit->object.oid));
      exit_status = 0;
      commit->object.flags |= UNINTERESTING;
    }
  }
  return exit_status;
}

static int show_independent(struct commit **rev,
          int num_rev,
          unsigned int *rev_mask)
{
  int i;

  for (i = 0; i < num_rev; i++) {
    struct commit *commit = rev[i];
    unsigned int flag = rev_mask[i];

    if (commit->object.flags == flag)
      puts(oid_to_hex(&commit->object.oid));
    commit->object.flags |= UNINTERESTING;
  }
  return 0;
}

static void append_one_rev(const char *av)
{
  struct object_id revkey;
  if (!repo_get_oid(the_repository, av, &revkey)) {
    append_ref(av, &revkey, 0);
    return;
  }
  if (strpbrk(av, "*?[")) {
    /* glob style match */
    int saved_matches = ref_name_cnt;

    match_ref_pattern = av;
    match_ref_slash = count_slashes(av);
    refs_for_each_ref(get_main_ref_store(the_repository),
          append_matching_ref, NULL);
    if (saved_matches == ref_name_cnt &&
        ref_name_cnt < MAX_REVS)
      error(_("no matching refs with %s"), av);
    sort_ref_range(saved_matches, ref_name_cnt);
    return;
  }
  die("bad sha1 reference %s", av);
}

static int git_show_branch_config(const char *var, const char *value,
          const struct config_context *ctx, void *cb)
{
  if (!strcmp(var, "showbranch.default")) {
    if (!value)
      return config_error_nonbool(var);
    /*
     * default_arg is now passed to parse_options(), so we need to
     * mimic the real argv a bit better.
     */
    if (!default_args.nr)
      strvec_push(&default_args, "show-branch");
    strvec_push(&default_args, value);
    return 0;
  }

  if (!strcmp(var, "color.showbranch")) {
    showbranch_use_color = git_config_colorbool(var, value);
    return 0;
  }

  if (git_color_config(var, value, cb) < 0)
    return -1;

  return git_default_config(var, value, ctx, cb);
}

static int omit_in_dense(struct commit *commit, struct commit **rev, int n)
{
  /* If the commit is tip of the named branches, do not
   * omit it.
   * Otherwise, if it is a merge that is reachable from only one
   * tip, it is not that interesting.
   */
  int i, flag, count;
  for (i = 0; i < n; i++)
    if (rev[i] == commit)
      return 0;
  flag = commit->object.flags;
  for (i = count = 0; i < n; i++) {
    if (flag & (1u << (i + REV_SHIFT)))
      count++;
  }
  if (count == 1)
    return 1;
  return 0;
}

static int reflog = 0;

static int parse_reflog_param(const struct option *opt, const char *arg,
            int unset)
{
  char *ep;
  const char **base = (const char **)opt->value;
  BUG_ON_OPT_NEG(unset);
  if (!arg)
    arg = "";
  reflog = strtoul(arg, &ep, 10);
  if (*ep == ',')
    *base = ep + 1;
  else if (*ep)
    return error("unrecognized reflog param '%s'", arg);
  else
    *base = NULL;
  if (reflog <= 0)
    reflog = DEFAULT_REFLOG;
  return 0;
}

int cmd_show_branch(int ac, const char **av, const char *prefix)
{
  struct commit *rev[MAX_REVS], *commit;
  char *reflog_msg[MAX_REVS] = {0};
  struct commit_list *list = NULL, *seen = NULL;
  unsigned int rev_mask[MAX_REVS];
  int num_rev, i, extra = 0;
  int all_heads = 0, all_remotes = 0;
  int all_mask, all_revs;
  enum rev_sort_order sort_order = REV_SORT_IN_GRAPH_ORDER;
  char *head;
  struct object_id head_oid;
  int merge_base = 0;
  int independent = 0;
  int no_name = 0;
  int sha1_name = 0;
  int shown_merge_point = 0;
  int with_current_branch = 0;
  int head_at = -1;
  int topics = 0;
  int sparse = 0;
  const char *reflog_base = NULL;
  struct option builtin_show_branch_options[] = {
    OPT_BOOL('a', "all", &all_heads,
       N_("show remote-tracking and local branches")),
    OPT_BOOL('r', "remotes", &all_remotes,
       N_("show remote-tracking branches")),
    OPT__COLOR(&showbranch_use_color,
          N_("color '*!+-' corresponding to the branch")),
    { OPTION_INTEGER, 0, "more", &extra, N_("n"),
          N_("show <n> more commits after the common ancestor"),
          PARSE_OPT_OPTARG, NULL, (intptr_t)1 },
    OPT_SET_INT(0, "list", &extra, N_("synonym to more=-1"), -1),
    OPT_BOOL(0, "no-name", &no_name, N_("suppress naming strings")),
    OPT_BOOL(0, "current", &with_current_branch,
       N_("include the current branch")),
    OPT_BOOL(0, "sha1-name", &sha1_name,
       N_("name commits with their object names")),
    OPT_BOOL(0, "merge-base", &merge_base,
       N_("show possible merge bases")),
    OPT_BOOL(0, "independent", &independent,
          N_("show refs unreachable from any other ref")),
    OPT_SET_INT_F(0, "topo-order", &sort_order,
            N_("show commits in topological order"),
            REV_SORT_IN_GRAPH_ORDER, PARSE_OPT_NONEG),
    OPT_BOOL(0, "topics", &topics,
       N_("show only commits not on the first branch")),
    OPT_SET_INT(0, "sparse", &sparse,
          N_("show merges reachable from only one tip"), 1),
    OPT_SET_INT_F(0, "date-order", &sort_order,
            N_("topologically sort, maintaining date order "
         "where possible"),
            REV_SORT_BY_COMMIT_DATE, PARSE_OPT_NONEG),
    OPT_CALLBACK_F('g', "reflog", &reflog_base, N_("<n>[,<base>]"),
          N_("show <n> most recent ref-log entries starting at "
             "base"),
          PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
          parse_reflog_param),
    OPT_END()
  };
  const char **args_copy = NULL;
  int ret;

  init_commit_name_slab(&name_slab);

  git_config(git_show_branch_config, NULL);

  /* If nothing is specified, try the default first */
  if (ac == 1 && default_args.nr) {
    DUP_ARRAY(args_copy, default_args.v, default_args.nr);
    ac = default_args.nr;
    av = args_copy;
  }

  ac = parse_options(ac, av, prefix, builtin_show_branch_options,
         show_branch_usage, PARSE_OPT_STOP_AT_NON_OPTION);
  if (all_heads)
    all_remotes = 1;

  if (extra || reflog) {
    /* "listing" mode is incompatible with
     * independent nor merge-base modes.
     */
    if (independent || merge_base)
      usage_with_options(show_branch_usage,
             builtin_show_branch_options);
    if (reflog && ((0 < extra) || all_heads || all_remotes))
      /*
       * Asking for --more in reflog mode does not
       * make sense.  --list is Ok.
       *
       * Also --all and --remotes do not make sense either.
       */
      die(_("options '%s' and '%s' cannot be used together"), "--reflog",
        "--all/--remotes/--independent/--merge-base");
  }

  if (with_current_branch && reflog)
    die(_("options '%s' and '%s' cannot be used together"),
        "--reflog", "--current");

  /* If nothing is specified, show all branches by default */
  if (ac <= topics && all_heads + all_remotes == 0)
    all_heads = 1;

  if (reflog) {
    struct object_id oid;
    char *ref;
    int base = 0;
    unsigned int flags = 0;

    if (ac == 0) {
      static const char *fake_av[2];

      fake_av[0] = refs_resolve_refdup(get_main_ref_store(the_repository),
               "HEAD",
               RESOLVE_REF_READING,
               &oid,
               NULL);
      fake_av[1] = NULL;
      av = fake_av;
      ac = 1;
      if (!*av)
        die(_("no branches given, and HEAD is not valid"));
    }
    if (ac != 1)
      die(_("--reflog option needs one branch name"));

    if (MAX_REVS < reflog)
      die(Q_("only %d entry can be shown at one time.",
             "only %d entries can be shown at one time.",
             MAX_REVS), MAX_REVS);
    if (!repo_dwim_ref(the_repository, *av, strlen(*av), &oid,
           &ref, 0))
      die(_("no such ref %s"), *av);

    /* Has the base been specified? */
    if (reflog_base) {
      char *ep;
      base = strtoul(reflog_base, &ep, 10);
      if (*ep) {
        /* Ah, that is a date spec... */
        timestamp_t at;
        at = approxidate(reflog_base);
        read_ref_at(get_main_ref_store(the_repository),
              ref, flags, at, -1, &oid, NULL,
              NULL, NULL, &base);
      }
    }

    for (i = 0; i < reflog; i++) {
      char *logmsg = NULL;
      char *nth_desc;
      const char *msg;
      char *end;
      timestamp_t timestamp;
      int tz;

      if (read_ref_at(get_main_ref_store(the_repository),
          ref, flags, 0, base + i, &oid, &logmsg,
          &timestamp, &tz, NULL)) {
        free(logmsg);
        reflog = i;
        break;
      }

      end = strchr(logmsg, '\n');
      if (end)
        *end = '\0';

      msg = (*logmsg == '\0') ? "(none)" : logmsg;
      reflog_msg[i] = xstrfmt("(%s) %s",
            show_date(timestamp, tz,
                DATE_MODE(RELATIVE)),
            msg);
      free(logmsg);

      nth_desc = xstrfmt("%s@{%d}", *av, base+i);
      append_ref(nth_desc, &oid, 1);
      free(nth_desc);
    }
    free(ref);
  }
  else {
    while (0 < ac) {
      append_one_rev(*av);
      ac--; av++;
    }
    if (all_heads + all_remotes)
      snarf_refs(all_heads, all_remotes);
  }

  head = refs_resolve_refdup(get_main_ref_store(the_repository), "HEAD",
           RESOLVE_REF_READING,
           &head_oid, NULL);

  if (with_current_branch && head) {
    int has_head = 0;
    for (i = 0; !has_head && i < ref_name_cnt; i++) {
      /* We are only interested in adding the branch
       * HEAD points at.
       */
      if (rev_is_head(head, ref_name[i]))
        has_head++;
    }
    if (!has_head) {
      const char *name = head;
      skip_prefix(name, "refs/heads/", &name);
      append_one_rev(name);
    }
  }

  if (!ref_name_cnt) {
    fprintf(stderr, "No revs to be shown.\n");
    ret = 0;
    goto out;
  }

  for (num_rev = 0; ref_name[num_rev]; num_rev++) {
    struct object_id revkey;
    unsigned int flag = 1u << (num_rev + REV_SHIFT);

    if (MAX_REVS <= num_rev)
      die(Q_("cannot handle more than %d rev.",
             "cannot handle more than %d revs.",
             MAX_REVS), MAX_REVS);
    if (repo_get_oid(the_repository, ref_name[num_rev], &revkey))
      die(_("'%s' is not a valid ref."), ref_name[num_rev]);
    commit = lookup_commit_reference(the_repository, &revkey);
    if (!commit)
      die(_("cannot find commit %s (%s)"),
          ref_name[num_rev], oid_to_hex(&revkey));
    repo_parse_commit(the_repository, commit);
    mark_seen(commit, &seen);

    /* rev#0 uses bit REV_SHIFT, rev#1 uses bit REV_SHIFT+1,
     * and so on.  REV_SHIFT bits from bit 0 are used for
     * internal bookkeeping.
     */
    commit->object.flags |= flag;
    if (commit->object.flags == flag)
      commit_list_insert_by_date(commit, &list);
    rev[num_rev] = commit;
  }
  for (i = 0; i < num_rev; i++)
    rev_mask[i] = rev[i]->object.flags;

  if (0 <= extra)
    join_revs(&list, &seen, num_rev, extra);

  commit_list_sort_by_date(&seen);

  if (merge_base) {
    ret = show_merge_base(seen, num_rev);
    goto out;
  }

  if (independent) {
    ret = show_independent(rev, num_rev, rev_mask);
    goto out;
  }

  /* Show list; --more=-1 means list-only */
  if (1 < num_rev || extra < 0) {
    for (i = 0; i < num_rev; i++) {
      int j;
      int is_head = rev_is_head(head, ref_name[i]) &&
              oideq(&head_oid, &rev[i]->object.oid);
      if (extra < 0)
        printf("%c [%s] ",
               is_head ? '*' : ' ', ref_name[i]);
      else {
        for (j = 0; j < i; j++)
          putchar(' ');
        printf("%s%c%s [%s] ",
               get_color_code(i),
               is_head ? '*' : '!',
               get_color_reset_code(), ref_name[i]);
      }

      if (!reflog) {
        /* header lines never need name */
        show_one_commit(rev[i], 1);
      }
      else
        puts(reflog_msg[i]);

      if (is_head)
        head_at = i;
    }
    if (0 <= extra) {
      for (i = 0; i < num_rev; i++)
        putchar('-');
      putchar('\n');
    }
  }
  if (extra < 0) {
    ret = 0;
    goto out;
  }

  /* Sort topologically */
  sort_in_topological_order(&seen, sort_order);

  /* Give names to commits */
  if (!sha1_name && !no_name)
    name_commits(seen, rev, ref_name, num_rev);

  all_mask = ((1u << (REV_SHIFT + num_rev)) - 1);
  all_revs = all_mask & ~((1u << REV_SHIFT) - 1);

  for (struct commit_list *l = seen; l; l = l->next) {
    struct commit *commit = l->item;
    int this_flag = commit->object.flags;
    int is_merge_point = ((this_flag & all_revs) == all_revs);

    shown_merge_point |= is_merge_point;

    if (1 < num_rev) {
      int is_merge = !!(commit->parents &&
            commit->parents->next);
      if (topics &&
          !is_merge_point &&
          (this_flag & (1u << REV_SHIFT)))
        continue;
      if (!sparse && is_merge &&
          omit_in_dense(commit, rev, num_rev))
        continue;
      for (i = 0; i < num_rev; i++) {
        int mark;
        if (!(this_flag & (1u << (i + REV_SHIFT))))
          mark = ' ';
        else if (is_merge)
          mark = '-';
        else if (i == head_at)
          mark = '*';
        else
          mark = '+';
        if (mark == ' ')
          putchar(mark);
        else
          printf("%s%c%s",
                 get_color_code(i),
                 mark, get_color_reset_code());
      }
      putchar(' ');
    }
    show_one_commit(commit, no_name);

    if (shown_merge_point && --extra < 0)
      break;
  }

  ret = 0;

out:
  for (size_t i = 0; i < ARRAY_SIZE(reflog_msg); i++)
    free(reflog_msg[i]);
  free_commit_list(seen);
  free_commit_list(list);
  free(args_copy);
  free(head);
  return ret;
}

Coverage Report

Created: 2024-09-08 06:23