This is being discussed in the "Re: "git tag --contains <id>" is too
chatty, if <id> is invalid" thread.
$gmane/289312
On Sun, Mar 20, 2016 at 12:16 PM, Chirayu Desai <chirayudesai1@xxxxxxxxx> wrote:
> * To show only error text on an error instead of the full usage
> * Currently used only by commands with options "--with" or "--contains",
> such as 'tag', 'branch', 'for-each-ref'.
>
> It now prints only
> $ git tag --contains qq
> error: malformed object name qq
> instead of the full usage text after the error text.
>
> TODO: Add tests
> ---
> parse-options-cb.c | 12 ++++++++----
> parse-options.c | 5 +++++
> parse-options.h | 6 ++++--
> 3 files changed, 17 insertions(+), 6 deletions(-)
>
> diff --git a/parse-options-cb.c b/parse-options-cb.c
> index 239898d946..ac2ea4d674 100644
> --- a/parse-options-cb.c
> +++ b/parse-options-cb.c
> @@ -85,11 +85,15 @@ int parse_opt_commits(const struct option *opt, const char *arg, int unset)
>
> if (!arg)
> return -1;
> - if (get_sha1(arg, sha1))
> - return error("malformed object name %s", arg);
> + if (get_sha1(arg, sha1)) {
> + error("malformed object name %s", arg);
> + return -3;
> + }
> commit = lookup_commit_reference(sha1);
> - if (!commit)
> - return error("no such commit %s", arg);
> + if (!commit) {
> + error("no such commit %s", arg);
> + return -3;
> + }
> commit_list_insert(commit, opt->value);
> return 0;
> }
> diff --git a/parse-options.c b/parse-options.c
> index 47a9192060..d136c1afd0 100644
> --- a/parse-options.c
> +++ b/parse-options.c
> @@ -158,6 +158,9 @@ static int get_value(struct parse_opt_ctx_t *p,
> return (*opt->callback)(opt, NULL, 0) ? (-1) : 0;
> if (get_arg(p, opt, flags, &arg))
> return -1;
> + if (opt->flags & PARSE_OPT_NOUSAGE) {
> + return (*opt->callback)(opt, arg, 0);
> + }
> return (*opt->callback)(opt, arg, 0) ? (-1) : 0;
>
> case OPTION_INTEGER:
> @@ -504,6 +507,8 @@ int parse_options_step(struct parse_opt_ctx_t *ctx,
> goto show_usage_error;
> case -2:
> goto unknown;
> + case -3:
> + return PARSE_OPT_DONE;
> }
> continue;
> unknown:
> diff --git a/parse-options.h b/parse-options.h
> index ea4af92a51..628e34c5af 100644
> --- a/parse-options.h
> +++ b/parse-options.h
> @@ -38,7 +38,8 @@ enum parse_opt_option_flags {
> PARSE_OPT_LASTARG_DEFAULT = 16,
> PARSE_OPT_NODASH = 32,
> PARSE_OPT_LITERAL_ARGHELP = 64,
> - PARSE_OPT_SHELL_EVAL = 256
> + PARSE_OPT_SHELL_EVAL = 256,
> + PARSE_OPT_NOUSAGE = 512
Perhaps a _ON_ERR should be appended at the end to make it clearer?
> };
>
> struct option;
> @@ -89,6 +90,7 @@ typedef int parse_opt_ll_cb(struct parse_opt_ctx_t *ctx,
> * PARSE_OPT_LITERAL_ARGHELP: says that argh shouldn't be enclosed in brackets
> * (i.e. '<argh>') in the help message.
> * Useful for options with multiple parameters.
> + * PARSE_OPT_NOUSAGE: do not print usage / help on error.
> *
> * `callback`::
> * pointer to the callback to use for OPTION_CALLBACK or
> @@ -254,7 +256,7 @@ extern int parse_opt_passthru_argv(const struct option *, const char *, int);
> { OPTION_CALLBACK, (s), (l), (v), (a), (h), (f), parse_opt_passthru_argv }
> #define _OPT_CONTAINS_OR_WITH(name, variable, help, flag) \
> { OPTION_CALLBACK, 0, name, (variable), N_("commit"), (help), \
> - PARSE_OPT_LASTARG_DEFAULT | flag, \
> + PARSE_OPT_LASTARG_DEFAULT | PARSE_OPT_NOUSAGE | flag, \
> parse_opt_commits, (intptr_t) "HEAD" \
> }
> #define OPT_CONTAINS(v, h) _OPT_CONTAINS_OR_WITH("contains", v, h, 0)
> --
> 2.7.4
>
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