[PATCH v3 1/6] credential-cache{,--daemon}: don't build under NO_UNIX_SOCKETS

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Change the implementation of b5dd96b70ac (make credential helpers
builtins, 2020-08-13) to not build these at all under
NO_UNIX_SOCKETS.

This is the easiest way to get rid of one out of two users of an
obscure parse_options() API I'm trying to get rid of. It does mean
that the goal of emitting a custom error message in b5dd96b70ac is
being eliminated, but per [1] that seems to be an OK direction to go
in.

By not compiling it at all it won't be included in the "struct
cmd_struct", and therefore will also be omitted from
"--list-cmds=builtins".

1. https://lore.kernel.org/git/cover-v2-0.6-00000000000-20210910T153146Z-avarab@gmail.com/

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 Makefile                           |  3 +++
 builtin.h                          |  2 ++
 builtin/credential-cache--daemon.c | 21 ---------------------
 builtin/credential-cache.c         | 21 ---------------------
 git.c                              |  2 ++
 5 files changed, 7 insertions(+), 42 deletions(-)

diff --git a/Makefile b/Makefile
index 429c276058d..ecde3367fa2 100644
--- a/Makefile
+++ b/Makefile
@@ -1086,8 +1086,10 @@ BUILTIN_OBJS += builtin/commit-tree.o
 BUILTIN_OBJS += builtin/commit.o
 BUILTIN_OBJS += builtin/config.o
 BUILTIN_OBJS += builtin/count-objects.o
+ifndef NO_UNIX_SOCKETS
 BUILTIN_OBJS += builtin/credential-cache--daemon.o
 BUILTIN_OBJS += builtin/credential-cache.o
+endif
 BUILTIN_OBJS += builtin/credential-store.o
 BUILTIN_OBJS += builtin/credential.o
 BUILTIN_OBJS += builtin/describe.o
@@ -1693,6 +1695,7 @@ ifdef NO_INET_PTON
 endif
 ifdef NO_UNIX_SOCKETS
 	BASIC_CFLAGS += -DNO_UNIX_SOCKETS
+	EXCLUDED_PROGRAMS += git-credential-cache git-credential-cache--daemon
 else
 	LIB_OBJS += unix-socket.o
 	LIB_OBJS += unix-stream-server.o
diff --git a/builtin.h b/builtin.h
index 16ecd5586f0..9b3f173bd7c 100644
--- a/builtin.h
+++ b/builtin.h
@@ -140,8 +140,10 @@ int cmd_commit_tree(int argc, const char **argv, const char *prefix);
 int cmd_config(int argc, const char **argv, const char *prefix);
 int cmd_count_objects(int argc, const char **argv, const char *prefix);
 int cmd_credential(int argc, const char **argv, const char *prefix);
+#ifndef NO_UNIX_SOCKETS
 int cmd_credential_cache(int argc, const char **argv, const char *prefix);
 int cmd_credential_cache_daemon(int argc, const char **argv, const char *prefix);
+#endif
 int cmd_credential_store(int argc, const char **argv, const char *prefix);
 int cmd_describe(int argc, const char **argv, const char *prefix);
 int cmd_diff_files(int argc, const char **argv, const char *prefix);
diff --git a/builtin/credential-cache--daemon.c b/builtin/credential-cache--daemon.c
index 4c6c89ab0de..7785412dea4 100644
--- a/builtin/credential-cache--daemon.c
+++ b/builtin/credential-cache--daemon.c
@@ -1,8 +1,5 @@
 #include "builtin.h"
 #include "parse-options.h"
-
-#ifndef NO_UNIX_SOCKETS
-
 #include "config.h"
 #include "tempfile.h"
 #include "credential.h"
@@ -299,21 +296,3 @@ int cmd_credential_cache_daemon(int argc, const char **argv, const char *prefix)
 
 	return 0;
 }
-
-#else
-
-int cmd_credential_cache_daemon(int argc, const char **argv, const char *prefix)
-{
-	const char * const usage[] = {
-		"git credential-cache--daemon [options] <action>",
-		"",
-		"credential-cache--daemon is disabled in this build of Git",
-		NULL
-	};
-	struct option options[] = { OPT_END() };
-
-	argc = parse_options(argc, argv, prefix, options, usage, 0);
-	die(_("credential-cache--daemon unavailable; no unix socket support"));
-}
-
-#endif /* NO_UNIX_SOCKET */
diff --git a/builtin/credential-cache.c b/builtin/credential-cache.c
index e8a74157471..64942978650 100644
--- a/builtin/credential-cache.c
+++ b/builtin/credential-cache.c
@@ -1,8 +1,5 @@
 #include "builtin.h"
 #include "parse-options.h"
-
-#ifndef NO_UNIX_SOCKETS
-
 #include "credential.h"
 #include "string-list.h"
 #include "unix-socket.h"
@@ -137,21 +134,3 @@ int cmd_credential_cache(int argc, const char **argv, const char *prefix)
 
 	return 0;
 }
-
-#else
-
-int cmd_credential_cache(int argc, const char **argv, const char *prefix)
-{
-	const char * const usage[] = {
-		"git credential-cache [options] <action>",
-		"",
-		"credential-cache is disabled in this build of Git",
-		NULL
-	};
-	struct option options[] = { OPT_END() };
-
-	argc = parse_options(argc, argv, prefix, options, usage, 0);
-	die(_("credential-cache unavailable; no unix socket support"));
-}
-
-#endif /* NO_UNIX_SOCKETS */
diff --git a/git.c b/git.c
index 18bed9a9964..7c696e06ecf 100644
--- a/git.c
+++ b/git.c
@@ -513,8 +513,10 @@ static struct cmd_struct commands[] = {
 	{ "config", cmd_config, RUN_SETUP_GENTLY | DELAY_PAGER_CONFIG },
 	{ "count-objects", cmd_count_objects, RUN_SETUP },
 	{ "credential", cmd_credential, RUN_SETUP_GENTLY | NO_PARSEOPT },
+#ifndef NO_UNIX_SOCKETS
 	{ "credential-cache", cmd_credential_cache },
 	{ "credential-cache--daemon", cmd_credential_cache_daemon },
+#endif
 	{ "credential-store", cmd_credential_store },
 	{ "describe", cmd_describe, RUN_SETUP },
 	{ "diff", cmd_diff, NO_PARSEOPT },
-- 
2.33.0.995.ga5ea46173a2