[PATCH v3 1/9] pack-objects: use standard option incompatibility functions

[Taylor Blau <me@ttaylorr.com>]

pack-objects has a handful of explicit checks for pairs of command-line
options which are mutually incompatible. Many of these pre-date
a699367bb8 (i18n: factorize more 'incompatible options' messages,
2022-01-31).

Convert the explicit checks into die_for_incompatible_opt2() calls,
which simplifies the implementation and standardizes pack-objects'
output when given incompatible options (e.g., --stdin-packs with
--filter gives different output than --keep-unreachable with
--unpack-unreachable).

There is one minor piece of test fallout in t5331 that expects the old
format, which has been corrected.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 builtin/pack-objects.c        | 20 +++++++++++---------
 t/t5331-pack-objects-stdin.sh |  2 +-
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 6b06d159d2..20dd870bbf 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -4651,9 +4651,10 @@ int cmd_pack_objects(int argc,
 		strvec_push(&rp, "--unpacked");
 	}
 
-	if (exclude_promisor_objects && exclude_promisor_objects_best_effort)
-		die(_("options '%s' and '%s' cannot be used together"),
-		    "--exclude-promisor-objects", "--exclude-promisor-objects-best-effort");
+	die_for_incompatible_opt2(exclude_promisor_objects,
+				  "--exclude-promisor-objects",
+				  exclude_promisor_objects_best_effort,
+				  "--exclude-promisor-objects-best-effort");
 	if (exclude_promisor_objects) {
 		use_internal_rev_list = 1;
 		fetch_if_missing = 0;
@@ -4691,13 +4692,14 @@ int cmd_pack_objects(int argc,
 	if (!pack_to_stdout && thin)
 		die(_("--thin cannot be used to build an indexable pack"));
 
-	if (keep_unreachable && unpack_unreachable)
-		die(_("options '%s' and '%s' cannot be used together"), "--keep-unreachable", "--unpack-unreachable");
+	die_for_incompatible_opt2(keep_unreachable, "--keep-unreachable",
+				  unpack_unreachable, "--unpack-unreachable");
 	if (!rev_list_all || !rev_list_reflog || !rev_list_index)
 		unpack_unreachable_expiration = 0;
 
-	if (stdin_packs && filter_options.choice)
-		die(_("cannot use --filter with --stdin-packs"));
+	die_for_incompatible_opt2(stdin_packs, "--stdin-packs",
+				  filter_options.choice, "--filter");
+
 
 	if (stdin_packs && use_internal_rev_list)
 		die(_("cannot use internal rev list with --stdin-packs"));
@@ -4705,8 +4707,8 @@ int cmd_pack_objects(int argc,
 	if (cruft) {
 		if (use_internal_rev_list)
 			die(_("cannot use internal rev list with --cruft"));
-		if (stdin_packs)
-			die(_("cannot use --stdin-packs with --cruft"));
+		die_for_incompatible_opt2(stdin_packs, "--stdin-packs",
+					  cruft, "--cruft");
 	}
 
 	/*
diff --git a/t/t5331-pack-objects-stdin.sh b/t/t5331-pack-objects-stdin.sh
index b48c0cbe8f..8fd07deb8d 100755
--- a/t/t5331-pack-objects-stdin.sh
+++ b/t/t5331-pack-objects-stdin.sh
@@ -64,7 +64,7 @@ test_expect_success '--stdin-packs is incompatible with --filter' '
 		cd stdin-packs &&
 		test_must_fail git pack-objects --stdin-packs --stdout \
 			--filter=blob:none </dev/null 2>err &&
-		test_grep "cannot use --filter with --stdin-packs" err
+		test_grep "options .--stdin-packs. and .--filter. cannot be used together" err
 	)
 '
 
-- 
2.49.0.230.ga662d77f78