[PATCH v4 3/4] index-pack: add --progress-title option

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Add a --progress-title option to index-pack, when data is piped into
index-pack its progress is a proxy for whatever's feeding it data.

This option will allow us to set a more relevant progress bar title in
"git bundle unbundle", and is also used in my "bundle-uri" RFC
patches[1] by a new caller in fetch-pack.c.

The code change in cmd_index_pack() won't handle
"--progress-title=xyz", only "--progress-title xyz", and the "(i+1)"
style (as opposed to "i + 1") is a bit odd.

Not using the "--long-option=value" style is inconsistent with
existing long options handled by cmd_index_pack(), but makes the code
that needs to call it better (two strvec_push(), instead of needing a
strvec_pushf()). Since the option is internal-only the inconsistency
shouldn't matter.

I'm copying the pattern to handle it as-is from the handling of the
existing "-o" option in the same function, see 9cf6d3357aa (Add
git-index-pack utility, 2005-10-12) for its addition. That's a short
option, but the code to implement the two is the same in functionality
and style. Eventually we'd like to migrate all of this this to
parse_options(), which would make these differences in behavior go
away.

1. https://lore.kernel.org/git/RFC-cover-00.13-0000000000-20210805T150534Z-avarab@xxxxxxxxx/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@xxxxxxxxx>
---
 Documentation/git-index-pack.txt | 6 ++++++
 builtin/index-pack.c             | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/Documentation/git-index-pack.txt b/Documentation/git-index-pack.txt
index 7fa74b9e798..1f1e3592251 100644
--- a/Documentation/git-index-pack.txt
+++ b/Documentation/git-index-pack.txt
@@ -82,6 +82,12 @@ OPTIONS
 --strict::
 	Die, if the pack contains broken objects or links.
 
+--progress-title::
+	For internal use only.
++
+Set the title of the progress bar. The title is "Receiving objects" by
+default and "Indexing objects" when `--stdin` is specified.
+
 --check-self-contained-and-connected::
 	Die if the pack contains broken links. For internal use only.
 
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 8336466865c..0841c039ae2 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -122,6 +122,7 @@ static int strict;
 static int do_fsck_object;
 static struct fsck_options fsck_options = FSCK_OPTIONS_MISSING_GITMODULES;
 static int verbose;
+static const char *progress_title;
 static int show_resolving_progress;
 static int show_stat;
 static int check_self_contained_and_connected;
@@ -1157,6 +1158,7 @@ static void parse_pack_objects(unsigned char *hash)
 
 	if (verbose)
 		progress = start_progress(
+				progress_title ? progress_title :
 				from_stdin ? _("Receiving objects") : _("Indexing objects"),
 				nr_objects);
 	for (i = 0; i < nr_objects; i++) {
@@ -1806,6 +1808,10 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
 				input_len = sizeof(*hdr);
 			} else if (!strcmp(arg, "-v")) {
 				verbose = 1;
+			} else if (!strcmp(arg, "--progress-title")) {
+				if (progress_title || (i+1) >= argc)
+					usage(index_pack_usage);
+				progress_title = argv[++i];
 			} else if (!strcmp(arg, "--show-resolving-progress")) {
 				show_resolving_progress = 1;
 			} else if (!strcmp(arg, "--report-end-of-input")) {
-- 
2.33.0.813.g41c39388776




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