Re: [PATCH v2 0/9] submodule: tests, cleanup to prepare for built-in

> Changes since v1:
>
> * Noted the history of when "submodule--helper config" was last used,
>   per Glen's comment.
> * Re-titled the tests htat no longer use the now-removed
>   "submodule--helper config", per Glen's comment.
> * I removed _() from a string in what's left of "submodule--helper
>   config", which is now a test helper. We should not be translating
>   test helper strings.
> * Fixed a buggy for-loop in the t7422-submodule-output.sh test I'm
>   adding.
> * Fixed a trivial typo in a comment in that test & in another nearby
>   comment.
>

> Range-diff against v1:
>  1:  b2649f96715 !  1:  ca8f8b4bf63 submodule--helper: move "config" to a test-tool
>     @@ Commit message
>          'ab/submodule-helper-prep', 2022-09-13) the "config" sub-command was
>          only used by our own tests.
>      
>     +    It was last used by "git submodule" itself in code that went away with
>     +    a6226fd772b (submodule--helper: convert the bulk of cmd_add() to C,
>     +    2021-08-10).
>     +
>          Let's move it over, and while doing so make it easier to reason about
>          by splitting up the various uses for it into separate sub-commands, so
>          that we don't need to count arguments to see what it does.
>      
>     +    This also has the advantage that we stop wasting future translator
>     +    time on this command, currently the usage information for this
>     +    internal-only tool has been translated into several languages. The use
>     +    of the "_" function has also been removed from the "please make
>     +    sure..." message.
>     +
>          Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
>      
>       ## builtin/submodule--helper.c ##
>     @@ t/helper/test-submodule.c: static int cmd__submodule_resolve_relative_url(int ar
>      +	/* Equivalent to ACTION_SET in builtin/config.c */
>      +	if (argc == 3) {
>      +		if (!is_writing_gitmodules_ok())
>     -+			die(_("please make sure that the .gitmodules file is in the working tree"));
>     ++			die("please make sure that the .gitmodules file is in the working tree");
>      +
>      +		return config_set_in_gitmodules_file_gently(argv[1], argv[2]);
>      +	}
>     @@ t/helper/test-submodule.c: static int cmd__submodule_resolve_relative_url(int ar
>      +
>      +	if (argc == 2) {
>      +		if (!is_writing_gitmodules_ok())
>     -+			die(_("please make sure that the .gitmodules file is in the working tree"));
>     ++			die("please make sure that the .gitmodules file is in the working tree");
>      +		return config_set_in_gitmodules_file_gently(argv[1], NULL);
>      +	}
>      +	usage_with_options(usage, options);
>     @@ t/helper/test-submodule.c: static int cmd__submodule_resolve_relative_url(int ar
>      
>       ## t/t7411-submodule-config.sh ##
>      @@ t/t7411-submodule-config.sh: test_expect_success 'error in history in fetchrecursesubmodule lets continue' '
>     - test_expect_success 'reading submodules config from the working tree with "submodule--helper config"' '
>     + 	)
>     + '
>     + 
>     +-test_expect_success 'reading submodules config from the working tree with "submodule--helper config"' '
>     ++test_expect_success 'reading submodules config from the working tree' '
>       	(cd super &&
>       		echo "../submodule" >expect &&
>      -		git submodule--helper config submodule.submodule.url >actual &&
>     @@ t/t7411-submodule-config.sh: test_expect_success 'error in history in fetchrecur
>       	)
>       '
>       
>     - test_expect_success 'unsetting submodules config from the working tree with "submodule--helper config --unset"' '
>     +-test_expect_success 'unsetting submodules config from the working tree with "submodule--helper config --unset"' '
>     ++test_expect_success 'unsetting submodules config from the working tree' '
>       	(cd super &&
>      -		git submodule--helper config --unset submodule.submodule.url &&
>      -		git submodule--helper config submodule.submodule.url >actual &&
>     @@ t/t7411-submodule-config.sh: test_expect_success 'error in history in fetchrecur
>       		test_must_be_empty actual
>       	)
>       '
>     -@@ t/t7411-submodule-config.sh: test_expect_success 'unsetting submodules config from the working tree with "sub
>     - test_expect_success 'writing submodules config with "submodule--helper config"' '
>     + 
>     + 
>     +-test_expect_success 'writing submodules config with "submodule--helper config"' '
>     ++test_expect_success 'writing submodules config' '
>       	(cd super &&
>       		echo "new_url" >expect &&
>      -		git submodule--helper config submodule.submodule.url "new_url" &&
>     @@ t/t7411-submodule-config.sh: test_expect_success 'unsetting submodules config fr
>       		test_cmp expect actual
>       	)
>       '
>     -@@ t/t7411-submodule-config.sh: test_expect_success 'overwriting unstaged submodules config with "submodule--hel
>     + 
>     +-test_expect_success 'overwriting unstaged submodules config with "submodule--helper config"' '
>     ++test_expect_success 'overwriting unstaged submodules config' '
>       	test_when_finished "git -C super checkout .gitmodules" &&
>       	(cd super &&
>       		echo "newer_url" >expect &&
>  2:  cda36b5b6e0 !  2:  5508c27f653 submodule tests: add tests for top-level flag output
>     @@ t/t7422-submodule-output.sh (new)
>      +	git -C X pull &&
>      +	GIT_ALLOW_PROTOCOL=file git -C X submodule update --init &&
>      +
>     -+	# dirty p
>     ++	# dirty
>      +	for d in S.D X/S.D
>      +	do
>     -+		echo dirty >S.D/A.t || return 1
>     ++		echo dirty >"$d"/A.t || return 1
>      +	done &&
>      +
>      +	# commit (for --cached)
>     @@ t/t7422-submodule-output.sh (new)
>      +
>      +	for ref in A B C
>      +	do
>     -+		# Not different with SHA-1 and SHA-256, just (ab)usign
>     ++		# Not different with SHA-1 and SHA-256, just (ab)using
>      +		# test_oid_cache as a variable bag to avoid using
>      +		# $(git rev-parse ...).
>      +		oid=$(git rev-parse $ref) &&
>  -:  ----------- >  3:  a3529d7f9e0 submodule--helper: fix  a memory leak in "status"
>  3:  0ed1fc7fdf8 =  4:  c14cc0e14b8 submodule tests: test for a "foreach" blind-spot
>  4:  f7adfbc13ae =  5:  459ea25125b submodule.c: refactor recursive block out of absorb function
>  5:  2b8afd73b9b =  6:  322a02c30fc submodule API & "absorbgitdirs": remove "----recursive" option
>  6:  91208241070 =  7:  d1f4ac20a4f submodule--helper: remove --prefix from "absorbgitdirs"
>  7:  77d4d5a6c09 =  8:  ac9ff05ef68 submodule--helper: drop "update --prefix <pfx>" for "-C <pfx> update"
>  8:  105853cd358 =  9:  cccd92a829c submodule--helper: use OPT_SUBCOMMAND() API