Re: [PATCH] pack-redundant: gauge the usage before proposing its removal

[Junio C Hamano <gitster@pobox.com>]

Taylor Blau <me@ttaylorr.com> writes:

> On Tue, Aug 25, 2020 at 03:45:52PM -0700, Junio C Hamano wrote:
>> The subcommand is unusably slow and the reason why nobody reports it
>> as a performance bug is suspected to be the absense of users.  Let's
>> show a big message that asks the user to tell us that they still
>> care about the command when an attempt is made to run the command,
>> with an escape hatch to override it with a command line option.
>>
>> In a few releases, we may turn it into an error and keep it for a
>> few more releases before finally removing it (during the whole time,
>> the plan to remove it would be interrupted by end user raising hand).
>>
>> Signed-off-by: Junio C Hamano <gitster@pobox.com>
>> ---
>
> Thanks. Peff's plan seems reasonable to me (and I'd like to add that I
> am a frequent reader of the release notes ;-)), as does this patch.
>
>   Reviewed-by: Taylor Blau <me@ttaylorr.com>

Thanks.  It needs updates to a test script, though.

diff --git a/t/t5323-pack-redundant.sh b/t/t5323-pack-redundant.sh
index 6b4d1ca353..2dd2d67b9e 100755
--- a/t/t5323-pack-redundant.sh
+++ b/t/t5323-pack-redundant.sh
@@ -39,6 +39,8 @@ relationship between packs and objects is as follows:
 master_repo=master.git
 shared_repo=shared.git
 
+git_pack_redundant='git pack-redundant --i-still-use-this'
+
 # Create commits in <repo> and assign each commit's oid to shell variables
 # given in the arguments (A, B, and C). E.g.:
 #
@@ -154,7 +156,7 @@ test_expect_success 'master: no redundant for pack 1, 2, 3' '
 		EOF
 	(
 		cd "$master_repo" &&
-		git pack-redundant --all >out &&
+		$git_pack_redundant --all >out &&
 		test_must_be_empty out
 	)
 '
@@ -192,7 +194,7 @@ test_expect_success 'master: one of pack-2/pack-3 is redundant' '
 		cat >expect <<-EOF &&
 			P3:$P3
 			EOF
-		git pack-redundant --all >out &&
+		$git_pack_redundant --all >out &&
 		format_packfiles <out >actual &&
 		test_cmp expect actual
 	)
@@ -231,7 +233,7 @@ test_expect_success 'master: pack 2, 4, and 6 are redundant' '
 			P4:$P4
 			P6:$P6
 			EOF
-		git pack-redundant --all >out &&
+		$git_pack_redundant --all >out &&
 		format_packfiles <out >actual &&
 		test_cmp expect actual
 	)
@@ -266,7 +268,7 @@ test_expect_success 'master: pack-8 (subset of pack-1) is also redundant' '
 			P6:$P6
 			P8:$P8
 			EOF
-		git pack-redundant --all >out &&
+		$git_pack_redundant --all >out &&
 		format_packfiles <out >actual &&
 		test_cmp expect actual
 	)
@@ -284,9 +286,9 @@ test_expect_success 'master: clean loose objects' '
 test_expect_success 'master: remove redundant packs and pass fsck' '
 	(
 		cd "$master_repo" &&
-		git pack-redundant --all | xargs rm &&
+		$git_pack_redundant --all | xargs rm &&
 		git fsck &&
-		git pack-redundant --all >out &&
+		$git_pack_redundant --all >out &&
 		test_must_be_empty out
 	)
 '
@@ -304,7 +306,7 @@ test_expect_success 'setup shared.git' '
 test_expect_success 'shared: all packs are redundant, but no output without --alt-odb' '
 	(
 		cd "$shared_repo" &&
-		git pack-redundant --all >out &&
+		$git_pack_redundant --all >out &&
 		test_must_be_empty out
 	)
 '
@@ -343,7 +345,7 @@ test_expect_success 'shared: show redundant packs in stderr for verbose mode' '
 			P5:$P5
 			P7:$P7
 			EOF
-		git pack-redundant --all --verbose >out 2>out.err &&
+		$git_pack_redundant --all --verbose >out 2>out.err &&
 		test_must_be_empty out &&
 		grep "pack$" out.err | format_packfiles >actual &&
 		test_cmp expect actual
@@ -356,9 +358,9 @@ test_expect_success 'shared: remove redundant packs, no packs left' '
 		cat >expect <<-EOF &&
 			fatal: Zero packs found!
 			EOF
-		git pack-redundant --all --alt-odb | xargs rm &&
+		$git_pack_redundant --all --alt-odb | xargs rm &&
 		git fsck &&
-		test_must_fail git pack-redundant --all --alt-odb >actual 2>&1 &&
+		test_must_fail $git_pack_redundant --all --alt-odb >actual 2>&1 &&
 		test_cmp expect actual
 	)
 '
@@ -386,7 +388,7 @@ test_expect_success 'shared: create new objects and packs' '
 test_expect_success 'shared: no redundant without --alt-odb' '
 	(
 		cd "$shared_repo" &&
-		git pack-redundant --all >out &&
+		$git_pack_redundant --all >out &&
 		test_must_be_empty out
 	)
 '
@@ -417,7 +419,7 @@ test_expect_success 'shared: no redundant without --alt-odb' '
 test_expect_success 'shared: one pack is redundant with --alt-odb' '
 	(
 		cd "$shared_repo" &&
-		git pack-redundant --all --alt-odb >out &&
+		$git_pack_redundant --all --alt-odb >out &&
 		format_packfiles <out >actual &&
 		test_line_count = 1 actual
 	)
@@ -454,7 +456,7 @@ test_expect_success 'shared: ignore unique objects and all two packs are redunda
 			Px1:$Px1
 			Px2:$Px2
 			EOF
-		git pack-redundant --all --alt-odb >out <<-EOF &&
+		$git_pack_redundant --all --alt-odb >out <<-EOF &&
 			$X
 			$Y
 			$Z