[PATCH] scalar: accept -C and -c options before the subcommand

["Johannes Schindelin via GitGitGadget" <gitgitgadget@gmail.com>]

From: Johannes Schindelin <johannes.schindelin@gmx.de>

The `git` executable has these two very useful options:

-C <directory>:
	switch to the specified directory before performing any actions

-c <key>=<value>:
	temporarily configure this setting for the duration of the
	specified scalar subcommand

With this commit, we teach the `scalar` executable the same trick.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
    scalar: accept -C and -c options
    
    This makes the scalar command a bit more handy by offering the same -c
    <key>=<value> and -C <directory> options as the git command.

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-1130%2Fdscho%2Fscalar-c-and-C-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-1130/dscho/scalar-c-and-C-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/1130

 contrib/scalar/scalar.c   | 22 +++++++++++++++++++++-
 contrib/scalar/scalar.txt | 10 ++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/contrib/scalar/scalar.c b/contrib/scalar/scalar.c
index 1ce9c2b00e8..7db2a97416e 100644
--- a/contrib/scalar/scalar.c
+++ b/contrib/scalar/scalar.c
@@ -808,6 +808,25 @@ int cmd_main(int argc, const char **argv)
 	struct strbuf scalar_usage = STRBUF_INIT;
 	int i;
 
+	while (argc > 1 && *argv[1] == '-') {
+		if (!strcmp(argv[1], "-C")) {
+			if (argc < 3)
+				die(_("-C requires a <directory>"));
+			if (chdir(argv[2]) < 0)
+				die_errno(_("could not change to '%s'"),
+					  argv[2]);
+			argc -= 2;
+			argv += 2;
+		} else if (!strcmp(argv[1], "-c")) {
+			if (argc < 3)
+				die(_("-c requires a <key>=<value> argument"));
+			git_config_push_parameter(argv[2]);
+			argc -= 2;
+			argv += 2;
+		} else
+			break;
+	}
+
 	if (argc > 1) {
 		argv++;
 		argc--;
@@ -818,7 +837,8 @@ int cmd_main(int argc, const char **argv)
 	}
 
 	strbuf_addstr(&scalar_usage,
-		      N_("scalar <command> [<options>]\n\nCommands:\n"));
+		      N_("scalar [-C <directory>] [-c <key>=<value>] "
+			 "<command> [<options>]\n\nCommands:\n"));
 	for (i = 0; builtins[i].name; i++)
 		strbuf_addf(&scalar_usage, "\t%s\n", builtins[i].name);
 
diff --git a/contrib/scalar/scalar.txt b/contrib/scalar/scalar.txt
index f416d637289..cf4e5b889cc 100644
--- a/contrib/scalar/scalar.txt
+++ b/contrib/scalar/scalar.txt
@@ -36,6 +36,16 @@ The `scalar` command implements various subcommands, and different options
 depending on the subcommand. With the exception of `clone`, `list` and
 `reconfigure --all`, all subcommands expect to be run in an enlistment.
 
+The following options can be specified _before_ the subcommand:
+
+-C <directory>::
+	Before running the subcommand, change the working directory. This
+	option imitates the same option of linkgit:git[1].
+
+-c <key>=<value>::
+	For the duration of running the specified subcommand, configure this
+	setting. This option imitates the same option of linkgit:git[1].
+
 COMMANDS
 --------
 

base-commit: ddc35d833dd6f9e8946b09cecd3311b8aa18d295
-- 
gitgitgadget