[PATCH 3/5] interpret-trailers: add an option to show only existing trailers
- From
Jeff King <peff@peff.net>
- Date
- Aug 9, 2017, 12:24 UTC
- Message-ID
- <20170809122439.fscozhyvxcx2oq2n@sigill.intra.peff.net>
- In-Reply-To
- <20170809122147.g44nwaitzctbadzm@sigill.intra.peff.net>
It can be useful to invoke interpret-trailers for the primary purpose of parsing existing trailers. But in that case, we don't want to apply existing ifMissing or ifExists rules from the config. Let's add a special mode where we avoid applying those rules. Coupled with --only-trailers, this gives us a reasonable parsing tool.
Signed-off-by: Jeff King <peff@peff.net> --- Documentation/git-interpret-trailers.txt | 5 +++++ builtin/interpret-trailers.c | 7 +++++++ t/t7513-interpret-trailers.sh | 15 +++++++++++++++ trailer.c | 7 ++++--- trailer.h | 1 + 5 files changed, 32 insertions(+), 3 deletions(-)
diff --git a/Documentation/git-interpret-trailers.txt b/Documentation/git-interpret-trailers.txt index 295dffbd21..b2a8fad248 100644 --- a/Documentation/git-interpret-trailers.txt +++ b/Documentation/git-interpret-trailers.txt @@ -83,6 +83,11 @@ OPTIONS --only-trailers:: Output only the trailers, not any other parts of the input. +--only-existing:: + Output only trailers that exist in the input; do not add any + from the command-line or by following configured `trailer.*` + rules. + CONFIGURATION VARIABLES ----------------------- diff --git a/builtin/interpret-trailers.c b/builtin/interpret-trailers.c index afb12c11bc..a49f94ba34 100644 --- a/builtin/interpret-trailers.c +++ b/builtin/interpret-trailers.c @@ -25,6 +25,7 @@ int cmd_interpret_trailers(int argc, const char **argv, const char *prefix) OPT_BOOL(0, "in-place", &opts.in_place, N_("edit files in place")), OPT_BOOL(0, "trim-empty", &opts.trim_empty, N_("trim empty trailers")), OPT_BOOL(0, "only-trailers", &opts.only_trailers, N_("output only the trailers")), + OPT_BOOL(0, "only-existing", &opts.only_existing, N_("output only existing trailers")), OPT_STRING_LIST(0, "trailer", &trailers, N_("trailer"), N_("trailer(s) to add")), OPT_END() @@ -33,6 +34,12 @@ int cmd_interpret_trailers(int argc, const char **argv, const char *prefix) argc = parse_options(argc, argv, prefix, options, git_interpret_trailers_usage, 0); + if (opts.only_existing && trailers.nr) + usage_msg_opt( + _("--trailer with --only-existing does not make sense"), + git_interpret_trailers_usage, + options); + if (argc) { int i; for (i = 0; i < argc; i++) diff --git a/t/t7513-interpret-trailers.sh b/t/t7513-interpret-trailers.sh index e5b0718ef6..525fd53e5b 100755 --- a/t/t7513-interpret-trailers.sh +++ b/t/t7513-interpret-trailers.sh @@ -1312,4 +1312,19 @@ test_expect_success 'only-trailers omits non-trailer in middle of block' ' test_cmp expected actual ' +test_expect_success 'only existing' ' + cat >expected <<-\EOF && + existing: existing-value + EOF + git interpret-trailers \ + --only-trailers --only-existing >actual <<-\EOF && + my subject + + my body + + existing: existing-value + EOF + test_cmp expected actual +' + test_done diff --git a/trailer.c b/trailer.c index a4ff99f98a..88f6efe523 100644 --- a/trailer.c +++ b/trailer.c @@ -991,9 +991,10 @@ void process_trailers(const char *file, struct process_trailer_options *opts, trailer_end = process_input_file(opts->only_trailers ? NULL : outfile, sb.buf, &head); - process_command_line_args(&arg_head, trailers); - - process_trailers_lists(&head, &arg_head); + if (!opts->only_existing) { + process_command_line_args(&arg_head, trailers); + process_trailers_lists(&head, &arg_head); + } print_all(outfile, &head, opts); diff --git a/trailer.h b/trailer.h index 4270849d80..6356b890ba 100644 --- a/trailer.h +++ b/trailer.h @@ -26,6 +26,7 @@ struct process_trailer_options { int in_place; int trim_empty; int only_trailers; + int only_existing; }; #define PROCESS_TRAILER_OPTIONS_INIT {0}
-- 2.14.0.609.gd2d1f7ddf