[PATCH 4/8] remote-{ext,fd}: print usage message on invalid arguments

[Jeff King]

We just say "Expected two arguments" when we get a different
number of arguments, but we can be slightly friendlier.
People shouldn't generally be running remote helpers
themselves, but curious users might say "git remote-ext -h".

Signed-off-by: Jeff King <p...@peff.net>
---
According to remote-curl.c, we should actually handle the
1-argument case, too. I didn't dig into that because it's
orthogonal to this series, and it's not clear that anybody
cares.

 builtin/remote-ext.c | 5 ++++-
 builtin/remote-fd.c  | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/builtin/remote-ext.c b/builtin/remote-ext.c
index 11b48bfb4..bfb21ba7d 100644
--- a/builtin/remote-ext.c
+++ b/builtin/remote-ext.c
@@ -3,6 +3,9 @@
 #include "run-command.h"
 #include "pkt-line.h"
 
+static const char usage_msg[] =
+       "git remote-ext <remote> <url>";
+
 /*
  * URL syntax:
  *     'command [arg1 [arg2 [...]]]'   Invoke command with given arguments.
@@ -193,7 +196,7 @@ static int command_loop(const char *child)
 int cmd_remote_ext(int argc, const char **argv, const char *prefix)
 {
        if (argc != 3)
-               die("Expected two arguments");
+               usage(usage_msg);
 
        return command_loop(argv[2]);
 }
diff --git a/builtin/remote-fd.c b/builtin/remote-fd.c
index 08d7121b6..91dfe07e0 100644
--- a/builtin/remote-fd.c
+++ b/builtin/remote-fd.c
@@ -1,6 +1,9 @@
 #include "builtin.h"
 #include "transport.h"
 
+static const char usage_msg[] =
+       "git remote-fd <remote> <url>";
+
 /*
  * URL syntax:
  *     'fd::<inoutfd>[/<anything>]'            Read/write socket pair
@@ -57,7 +60,7 @@ int cmd_remote_fd(int argc, const char **argv, const char 
*prefix)
        char *end;
 
        if (argc != 3)
-               die("Expected two arguments");
+               usage(usage_msg);
 
        input_fd = (int)strtoul(argv[2], &end, 10);
 
-- 
2.13.0.613.g11c956365