Re: [PATCH] cherry-pick: do not expect file arguments

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Clemens Buchacher <drizzd@xxxxxx> writes:

> If a commit-ish passed to cherry-pick or revert happens to have a file
> of the same name, git complains that the argument is ambiguous and
> advises to use '--'. To make things worse, the '--' argument is removed
> by parse_options, und so passing '--' has no effect.

Thanks.

I can see how this patch is one way to solve it, but if the command knows
that it is feedling only revs and no pathspecs, isn't the caller the one
that is responsible for adding "--" to the argv_array it is passing to
setup_revisions()?

With s/assume_dashdash/no_pathspecs/, the damage to the revision traversal
machinery does not look _too_ bad, but I am not convinced (yet) that this
patch is the best way to solve the issue.

> Instead, always interpret cherry-pick/revert arguments as revisions.
>
> Signed-off-by: Clemens Buchacher <drizzd@xxxxxx>
> ---
>  builtin/revert.c |    5 ++++-
>  revision.c       |   24 ++++++++++++++----------
>  revision.h       |    1 +
>  3 files changed, 19 insertions(+), 11 deletions(-)
>
> diff --git a/builtin/revert.c b/builtin/revert.c
> index e6840f2..92f3fa5 100644
> --- a/builtin/revert.c
> +++ b/builtin/revert.c
> @@ -181,12 +181,15 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts)
>  	if (opts->subcommand != REPLAY_NONE) {
>  		opts->revs = NULL;
>  	} else {
> +		struct setup_revision_opt s_r_opt;
>  		opts->revs = xmalloc(sizeof(*opts->revs));
>  		init_revisions(opts->revs, NULL);
>  		opts->revs->no_walk = 1;
>  		if (argc < 2)
>  			usage_with_options(usage_str, options);
> -		argc = setup_revisions(argc, argv, opts->revs, NULL);
> +		memset(&s_r_opt, 0, sizeof(s_r_opt));
> +		s_r_opt.assume_dashdash = 1;
> +		argc = setup_revisions(argc, argv, opts->revs, &s_r_opt);
>  	}
>  
>  	if (argc > 1)
> diff --git a/revision.c b/revision.c
> index b3554ed..9a0d9c7 100644
> --- a/revision.c
> +++ b/revision.c
> @@ -1715,17 +1715,21 @@ int setup_revisions(int argc, const char **argv, struct rev_info *revs, struct s
>  		submodule = opt->submodule;
>  
>  	/* First, search for "--" */
> -	seen_dashdash = 0;
> -	for (i = 1; i < argc; i++) {
> -		const char *arg = argv[i];
> -		if (strcmp(arg, "--"))
> -			continue;
> -		argv[i] = NULL;
> -		argc = i;
> -		if (argv[i + 1])
> -			append_prune_data(&prune_data, argv + i + 1);
> +	if (opt && opt->assume_dashdash) {
>  		seen_dashdash = 1;
> -		break;
> +	} else {
> +		seen_dashdash = 0;
> +		for (i = 1; i < argc; i++) {
> +			const char *arg = argv[i];
> +			if (strcmp(arg, "--"))
> +				continue;
> +			argv[i] = NULL;
> +			argc = i;
> +			if (argv[i + 1])
> +				append_prune_data(&prune_data, argv + i + 1);
> +			seen_dashdash = 1;
> +			break;
> +		}
>  	}
>  
>  	/* Second, deal with arguments and options */
> diff --git a/revision.h b/revision.h
> index b8e9223..1a08384 100644
> --- a/revision.h
> +++ b/revision.h
> @@ -183,6 +183,7 @@ struct setup_revision_opt {
>  	const char *def;
>  	void (*tweak)(struct rev_info *, struct setup_revision_opt *);
>  	const char *submodule;
> +	int assume_dashdash;
>  };
>  
>  extern void init_revisions(struct rev_info *revs, const char *prefix);
--
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