From 9044143ff150a4ccc834523ae2f9ee11c2c961c3 Mon Sep 17 00:00:00 2001 From: Ramkumar Ramachandra Date: Thu, 4 Aug 2011 16:09:07 +0530 Subject: [PATCH] revert: Don't create invalid replay_opts in parse_args The "--ff" command-line option cannot be used with some other command-line options. However, parse_args still parses these incompatible options into a replay_opts structure for use by the rest of the program. Although pick_commits, the current gatekeeper to the cherry-pick machinery, checks the validity of the replay_opts structure before before starting its operation, there will be multiple entry points to the cherry-pick machinery in future. To futureproof the code and catch these errors in one place, make sure that an invalid replay_opts structure is not created by parse_args in the first place. We still check the replay_opts structure for validity in pick_commits, but this is an assert() now to emphasize that it's the caller's responsibility to get it right. Inspired-by: Christian Couder Mentored-by: Jonathan Nieder Helped-by: Junio C Hamano Signed-off-by: Ramkumar Ramachandra Signed-off-by: Jonathan Nieder Signed-off-by: Junio C Hamano --- builtin/revert.c | 38 +++++++++++++++++++++++++++----------- 1 file changed, 27 insertions(+), 11 deletions(-) diff --git a/builtin/revert.c b/builtin/revert.c index 90fe2efe94..f75c9cb6c8 100644 --- a/builtin/revert.c +++ b/builtin/revert.c @@ -86,9 +86,26 @@ static int option_parse_x(const struct option *opt, return 0; } +static void verify_opt_compatible(const char *me, const char *base_opt, ...) +{ + const char *this_opt; + va_list ap; + + va_start(ap, base_opt); + while ((this_opt = va_arg(ap, const char *))) { + if (va_arg(ap, int)) + break; + } + va_end(ap); + + if (this_opt) + die(_("%s: %s cannot be used with %s"), me, this_opt, base_opt); +} + static void parse_args(int argc, const char **argv, struct replay_opts *opts) { const char * const * usage_str = revert_or_cherry_pick_usage(opts); + const char *me = action_name(opts); int noop; struct option options[] = { OPT_BOOLEAN('n', "no-commit", &opts->no_commit, "don't automatically commit"), @@ -122,6 +139,13 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts) if (opts->commit_argc < 2) usage_with_options(usage_str, options); + if (opts->allow_ff) + verify_opt_compatible(me, "--ff", + "--signoff", opts->signoff, + "--no-commit", opts->no_commit, + "-x", opts->record_origin, + "--edit", opts->edit, + NULL); opts->commit_argv = argv; } @@ -569,17 +593,9 @@ static int pick_commits(struct replay_opts *opts) struct commit *commit; setenv(GIT_REFLOG_ACTION, action_name(opts), 0); - if (opts->allow_ff) { - if (opts->signoff) - die(_("cherry-pick --ff cannot be used with --signoff")); - if (opts->no_commit) - die(_("cherry-pick --ff cannot be used with --no-commit")); - if (opts->record_origin) - die(_("cherry-pick --ff cannot be used with -x")); - if (opts->edit) - die(_("cherry-pick --ff cannot be used with --edit")); - } - + if (opts->allow_ff) + assert(!(opts->signoff || opts->no_commit || + opts->record_origin || opts->edit)); read_and_refresh_cache(opts); prepare_revs(&revs, opts); -- 2.11.4.GIT