#include "git-compat-util.h"

#include "parse.h"

#include "environment.h"

#include "run-command.h"

#include "strbuf.h"

#include "prompt.h"

#include "compat/terminal.h"

static char *do_askpass(const char *cmd, const char *prompt)

{

  struct child_process pass = CHILD_PROCESS_INIT;

  static struct strbuf buffer = STRBUF_INIT;

  int err = 0;

  strvec_push(&pass.args, cmd);

  strvec_push(&pass.args, prompt);

  pass.out = -1;

  if (start_command(&pass))

    return NULL;

  strbuf_reset(&buffer);

  if (strbuf_read(&buffer, pass.out, 20) < 0)

    err = 1;

  close(pass.out);

  if (finish_command(&pass))

    err = 1;

  if (err) {

    error("unable to read askpass response from '%s'", cmd);

    strbuf_release(&buffer);

    return NULL;

  }

  strbuf_setlen(&buffer, strcspn(buffer.buf, "\r\n"));

  return buffer.buf;

}

char *git_prompt(const char *prompt, int flags)

{

  char *r = NULL;

  if (flags & PROMPT_ASKPASS) {

    const char *askpass;

    askpass = getenv("GIT_ASKPASS");

    if (!askpass)

      askpass = askpass_program;

    if (!askpass)

      askpass = getenv("SSH_ASKPASS");

    if (askpass && *askpass)

      r = do_askpass(askpass, prompt);

  }

  if (!r) {

    const char *err;

    if (git_env_bool("GIT_TERMINAL_PROMPT", 1)) {

      r = git_terminal_prompt(prompt, flags & PROMPT_ECHO);

      err = strerror(errno);

    } else {

      err = "terminal prompts disabled";

    }

    if (!r) {

      /* prompts already contain ": " at the end */

      die("could not read %s%s", prompt, err);

    }

  }

  return r;

}

int git_read_line_interactively(struct strbuf *line)

{

  int ret;

  fflush(stdout);

  ret = strbuf_getline_lf(line, stdin);

  if (ret != EOF)

    strbuf_trim_trailing_newline(line);

  return ret;

}