Re: [RFC/PATCH] ls-remote: optionally return non-zero on non-existing refs

> git ls-remote returns zero no matter if the given references were found
> or not. Teach ls-remote an option --exit-status to make it optionally
> returning a non-zero status.
>
> Signed-off-by: Michael Schubert <mschub@elegosoft.com>
> ---
>
> If there is just one existing ref in a list of non-exising refs, this will
> return zero though - as "git show-ref" does.
>
>
>  Documentation/git-ls-remote.txt |    7 ++++++-
>  builtin/ls-remote.c             |   12 ++++++++++--
>  2 files changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/git-ls-remote.txt b/Documentation/git-ls-remote.txt
> index c3df8c0..26cf705 100644
> --- a/Documentation/git-ls-remote.txt
> +++ b/Documentation/git-ls-remote.txt
> @@ -10,7 +10,7 @@ SYNOPSIS
>  --------
>  [verse]
>  'git ls-remote' [--heads] [--tags]  [-u <exec> | --upload-pack <exec>]
> -             <repository> [<refs>...]
> +             [-e|--exit-code] <repository> [<refs>...]
>
>  DESCRIPTION
>  -----------
> @@ -36,6 +36,11 @@ OPTIONS
>        SSH and where the SSH daemon does not use the PATH configured by the
>        user.
>
> +-e::
> +--exit-code::
> +       Exit with a non-zero status code when the specified references don't
> +       exist.
> +
>  <repository>::
>        Location of the repository.  The shorthand defined in
>        $GIT_DIR/branches/ can be used. Use "." (dot) to list references in
> diff --git a/builtin/ls-remote.c b/builtin/ls-remote.c
> index 1a1ff87..99fcf6b 100644
> --- a/builtin/ls-remote.c
> +++ b/builtin/ls-remote.c
> @@ -5,7 +5,7 @@
>
>  static const char ls_remote_usage[] =
>  "git ls-remote [--heads] [--tags]  [-u <exec> | --upload-pack <exec>]\n"
> -"                     [-q|--quiet] [<repository> [<refs>...]]";
> +"                     [-q|--quiet] [-e|--exit-code] [<repository> [<refs>...]]";
>
>  /*
>  * Is there one among the list of patterns that match the tail part
> @@ -35,6 +35,7 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
>        unsigned flags = 0;
>        int get_url = 0;
>        int quiet = 0;
> +       int exit_code = 0;
>        const char *uploadpack = NULL;
>        const char **pattern = NULL;
>
> @@ -74,6 +75,10 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
>                                get_url = 1;
>                                continue;
>                        }
> +                       if (!strcmp("--exit-code", arg) || !strcmp("-e", arg)) {
> +                               exit_code = 1;
> +                               continue;
> +                       }
>                        usage(ls_remote_usage);
>                }
>                dest = arg;
> @@ -115,12 +120,15 @@ int cmd_ls_remote(int argc, const char **argv, const char *prefix)
>
>        if (!dest && !quiet)
>                fprintf(stderr, "From %s\n", *remote->url);
> +
>        for ( ; ref; ref = ref->next) {
>                if (!check_ref_type(ref, flags))
>                        continue;
>                if (!tail_match(pattern, ref->name))
>                        continue;
>                printf("%s      %s\n", sha1_to_hex(ref->old_sha1), ref->name);
> +               exit_code = 0;
>        }
> -       return 0;
> +
> +       return (exit_code) ? 2 : 0;

>  }
> --
> 1.7.5.1
>
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