Users of the ref-filter code must call verify_ref_format() before formatting any refs, but most ignore its return value. This means we may print an error on a syntactically bogus pattern, but keep going anyway.
In most cases this results in a fatal error when we actually try to format a ref. But if you have no refs to show at all, then the behavior is confusing: git prints the error from verify_ref_format(), then exits with code 0 without showing any output. Let's instead abort immediately if we know we have a bogus format. We'll output the usage information if we have it handy (just like the existing call in cmd_for_each_ref() does), and otherwise just die(). Signed-off-by: Jeff King <[email protected]> --- builtin/branch.c | 4 +++- builtin/tag.c | 7 ++++--- builtin/verify-tag.c | 4 +++- 3 files changed, 10 insertions(+), 5 deletions(-) diff --git a/builtin/branch.c b/builtin/branch.c index 8a0595e11..e756a5667 100644 --- a/builtin/branch.c +++ b/builtin/branch.c @@ -409,7 +409,9 @@ static void print_ref_list(struct ref_filter *filter, struct ref_sorting *sortin if (!format) format = to_free = build_format(filter, maxwidth, remote_prefix); - verify_ref_format(format); + + if (verify_ref_format(format)) + die(_("unable to parse format string")); ref_array_sort(sorting, &array); diff --git a/builtin/tag.c b/builtin/tag.c index 01154ea8d..216629fb2 100644 --- a/builtin/tag.c +++ b/builtin/tag.c @@ -53,7 +53,8 @@ static int list_tags(struct ref_filter *filter, struct ref_sorting *sorting, con format = "%(refname:lstrip=2)"; } - verify_ref_format(format); + if (verify_ref_format(format)) + die(_("unable to parse format string")); filter->with_commit_tag_algo = 1; filter_refs(&array, filter, FILTER_REFS_TAGS); ref_array_sort(sorting, &array); @@ -501,8 +502,8 @@ int cmd_tag(int argc, const char **argv, const char *prefix) if (cmdmode == 'd') return for_each_tag_name(argv, delete_tag, NULL); if (cmdmode == 'v') { - if (format) - verify_ref_format(format); + if (format && verify_ref_format(format)) + usage_with_options(git_tag_usage, options); return for_each_tag_name(argv, verify_tag, format); } diff --git a/builtin/verify-tag.c b/builtin/verify-tag.c index f9a5f7535..a10eca2b2 100644 --- a/builtin/verify-tag.c +++ b/builtin/verify-tag.c @@ -51,7 +51,9 @@ int cmd_verify_tag(int argc, const char **argv, const char *prefix) flags |= GPG_VERIFY_VERBOSE; if (fmt_pretty) { - verify_ref_format(fmt_pretty); + if (verify_ref_format(fmt_pretty)) + usage_with_options(verify_tag_usage, + verify_tag_options); flags |= GPG_VERIFY_OMIT_STATUS; } -- 2.13.2.1157.gc6daca446
