The "--ff" command-line option cannot be used with four 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. Also ensure that regressions in maintaining this
invariant are caught in the future by adding an assertion in
pick_commits.
Inspired-by: Christian Couder <chriscool@xxxxxxxxxxxxx>
Mentored-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
---
builtin/revert.c | 37 ++++++++++++++++++++++++++-----------
1 files changed, 26 insertions(+), 11 deletions(-)
diff --git a/builtin/revert.c b/builtin/revert.c
index da55ba4..ef5b097 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -82,6 +82,22 @@ 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;
+ int set;
+
+ va_start(ap, base_opt);
+ while ((this_opt = va_arg(ap, const char *))) {
+ set = va_arg(ap, int);
+ if (set)
+ die(_("%s: %s cannot be used with %s"),
+ me, this_opt, base_opt);
+ }
+ va_end(ap);
+}
+
static void parse_args(int argc, const char **argv, struct replay_opts *opts)
{
const char * const * usage_str = revert_or_cherry_pick_usage(opts);
@@ -118,6 +134,13 @@ 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;
}
@@ -552,17 +575,9 @@ static int pick_commits(struct replay_opts *opts)
struct commit *commit;
setenv(GIT_REFLOG_ACTION, me, 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(me, opts);
prepare_revs(&revs, opts);
--
1.7.5.GIT
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