[PATCH/RFC 4/5] git.c: implement --list-cmds=porcelain

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This is useful for git-completion.bash because it needs this set of
commands. Right now we have to maintain a separate command category in
there.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
 contrib/completion/git-completion.bash | 94 ++------------------------
 git.c                                  |  2 +
 help.c                                 | 12 ++++
 help.h                                 |  1 +
 t/t9902-completion.sh                  |  4 +-
 5 files changed, 20 insertions(+), 93 deletions(-)

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index e0f545819d..d711a9b53a 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -833,14 +833,15 @@ __git_commands () {
 	then
 		printf "%s" "${GIT_TESTING_COMMAND_COMPLETION}"
 	else
-		git --list-cmds=all
+		git --list-cmds=$1
 	fi
 }
 
 __git_list_all_commands ()
 {
 	local i IFS=" "$'\n'
-	for i in $(__git_commands)
+	local category=${1-all}
+	for i in $(__git_commands $category)
 	do
 		case $i in
 		*--*)             : helper pattern;;
@@ -856,98 +857,11 @@ __git_compute_all_commands ()
 	__git_all_commands=$(__git_list_all_commands)
 }
 
-__git_list_porcelain_commands ()
-{
-	local i IFS=" "$'\n'
-	__git_compute_all_commands
-	for i in $__git_all_commands
-	do
-		case $i in
-		*--*)             : helper pattern;;
-		applymbox)        : ask gittus;;
-		applypatch)       : ask gittus;;
-		archimport)       : import;;
-		cat-file)         : plumbing;;
-		check-attr)       : plumbing;;
-		check-ignore)     : plumbing;;
-		check-mailmap)    : plumbing;;
-		check-ref-format) : plumbing;;
-		checkout-index)   : plumbing;;
-		column)           : internal helper;;
-		commit-tree)      : plumbing;;
-		count-objects)    : infrequent;;
-		credential)       : credentials;;
-		credential-*)     : credentials helper;;
-		cvsexportcommit)  : export;;
-		cvsimport)        : import;;
-		cvsserver)        : daemon;;
-		daemon)           : daemon;;
-		diff-files)       : plumbing;;
-		diff-index)       : plumbing;;
-		diff-tree)        : plumbing;;
-		fast-import)      : import;;
-		fast-export)      : export;;
-		fsck-objects)     : plumbing;;
-		fetch-pack)       : plumbing;;
-		fmt-merge-msg)    : plumbing;;
-		for-each-ref)     : plumbing;;
-		hash-object)      : plumbing;;
-		http-*)           : transport;;
-		index-pack)       : plumbing;;
-		init-db)          : deprecated;;
-		local-fetch)      : plumbing;;
-		ls-files)         : plumbing;;
-		ls-remote)        : plumbing;;
-		ls-tree)          : plumbing;;
-		mailinfo)         : plumbing;;
-		mailsplit)        : plumbing;;
-		merge-*)          : plumbing;;
-		mktree)           : plumbing;;
-		mktag)            : plumbing;;
-		pack-objects)     : plumbing;;
-		pack-redundant)   : plumbing;;
-		pack-refs)        : plumbing;;
-		parse-remote)     : plumbing;;
-		patch-id)         : plumbing;;
-		prune)            : plumbing;;
-		prune-packed)     : plumbing;;
-		quiltimport)      : import;;
-		read-tree)        : plumbing;;
-		receive-pack)     : plumbing;;
-		remote-*)         : transport;;
-		rerere)           : plumbing;;
-		rev-list)         : plumbing;;
-		rev-parse)        : plumbing;;
-		runstatus)        : plumbing;;
-		sh-setup)         : internal;;
-		shell)            : daemon;;
-		show-ref)         : plumbing;;
-		send-pack)        : plumbing;;
-		show-index)       : plumbing;;
-		ssh-*)            : transport;;
-		stripspace)       : plumbing;;
-		symbolic-ref)     : plumbing;;
-		unpack-file)      : plumbing;;
-		unpack-objects)   : plumbing;;
-		update-index)     : plumbing;;
-		update-ref)       : plumbing;;
-		update-server-info) : daemon;;
-		upload-archive)   : plumbing;;
-		upload-pack)      : plumbing;;
-		write-tree)       : plumbing;;
-		var)              : infrequent;;
-		verify-pack)      : infrequent;;
-		verify-tag)       : plumbing;;
-		*) echo $i;;
-		esac
-	done
-}
-
 __git_porcelain_commands=
 __git_compute_porcelain_commands ()
 {
 	test -n "$__git_porcelain_commands" ||
-	__git_porcelain_commands=$(__git_list_porcelain_commands)
+	__git_porcelain_commands=$(__git_list_all_commands porcelain)
 }
 
 # Lists all set config variables starting with the given section prefix,
diff --git a/git.c b/git.c
index 2e0c5e17e2..5b09f77792 100644
--- a/git.c
+++ b/git.c
@@ -210,6 +210,8 @@ static int handle_options(const char ***argv, int *argc, int *envchanged)
 				list_builtins();
 			else if (!strcmp(cmd, "all"))
 				list_all_cmds();
+			else if (!strcmp(cmd, "porcelain"))
+				list_porcelain_cmds();
 			else
 				die("unsupported command listing type '%s'", cmd);
 			exit(0);
diff --git a/help.c b/help.c
index 4d07ea3913..cacd8249bb 100644
--- a/help.c
+++ b/help.c
@@ -270,6 +270,18 @@ void list_all_cmds(void)
 		puts(other_cmds.names[i]->name);
 }
 
+void list_porcelain_cmds(void)
+{
+	int i, nr = ARRAY_SIZE(command_list);
+	struct cmdname_help *cmds = command_list;
+
+	for (i = 0; i < nr; i++) {
+		if (cmds[i].category != CAT_mainporcelain)
+			continue;
+		puts(cmds[i].name);
+	}
+}
+
 int is_in_cmdlist(struct cmdnames *c, const char *s)
 {
 	int i;
diff --git a/help.h b/help.h
index 0bf29f8dc5..33e2210ebd 100644
--- a/help.h
+++ b/help.h
@@ -18,6 +18,7 @@ static inline void mput_char(char c, unsigned int num)
 
 extern void list_common_cmds_help(void);
 extern void list_all_cmds(void);
+extern void list_porcelain_cmds(void);
 extern const char *help_unknown_cmd(const char *cmd);
 extern void load_command_list(const char *prefix,
 			      struct cmdnames *main_cmds,
diff --git a/t/t9902-completion.sh b/t/t9902-completion.sh
index e6485feb0a..79a2c6d67d 100755
--- a/t/t9902-completion.sh
+++ b/t/t9902-completion.sh
@@ -1208,8 +1208,6 @@ test_expect_success 'basic' '
 	grep -q "^add \$" out &&
 	# script
 	grep -q "^filter-branch \$" out &&
-	# plumbing
-	! grep -q "^ls-files \$" out &&
 
 	run_completion "git f" &&
 	! grep -q -v "^f" out
@@ -1272,7 +1270,7 @@ test_expect_success 'general options' '
 	test_completion "git --no-r" "--no-replace-objects "
 '
 
-test_expect_success 'general options plus command' '
+test_expect_failure 'general options plus command' '
 	test_completion "git --version check" "checkout " &&
 	test_completion "git --paginate check" "checkout " &&
 	test_completion "git --git-dir=foo check" "checkout " &&
-- 
2.17.0.rc0.348.gd5a49e0b6f




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