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[v3,14/15] scalar: implement the `version` command

Message ID d2cd2b7094b5a727a0d57f94b51caf7c6d8a44fc.1631129086.git.gitgitgadget@gmail.com (mailing list archive)
State Superseded
Headers show
Series Upstreaming the Scalar command | expand

Commit Message

Johannes Schindelin Sept. 8, 2021, 7:24 p.m. UTC
From: Johannes Schindelin <johannes.schindelin@gmx.de>

The .NET version of Scalar has a `version` command. This was necessary
because it was versioned independently of Git.

Since Scalar is now tightly coupled with Git, it does not make sense for
them to show different versions. Therefore, it shows the same output as
`git version`. For backwards-compatibility with the .NET version,
`scalar version` prints to `stderr`, though (`git version` prints to
`stdout` instead).

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 contrib/scalar/scalar.c | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
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Patch

diff --git a/contrib/scalar/scalar.c b/contrib/scalar/scalar.c
index 00bedb0bf66..728166aa97a 100644
--- a/contrib/scalar/scalar.c
+++ b/contrib/scalar/scalar.c
@@ -9,6 +9,7 @@ 
 #include "run-command.h"
 #include "refs.h"
 #include "dir.h"
+#include "help.h"
 
 /*
  * Remove the deepest subdirectory in the provided path string. Path must not
@@ -362,6 +363,15 @@  static int delete_enlistment(struct strbuf *enlistment)
 	return 0;
 }
 
+/*
+ * Dummy implementation; Using `get_version_info()` would cause a link error
+ * without this.
+ */
+void load_builtin_commands(const char *prefix, struct cmdnames *cmds)
+{
+	die("not implemented");
+}
+
 static int cmd_clone(int argc, const char **argv)
 {
 	const char *branch = NULL;
@@ -748,6 +758,34 @@  static int cmd_delete(int argc, const char **argv)
 	return res;
 }
 
+static int cmd_version(int argc, const char **argv)
+{
+	int verbose = 0, build_options = 0;
+	struct option options[] = {
+		OPT__VERBOSE(&verbose, N_("include Git version")),
+		OPT_BOOL(0, "build-options", &build_options,
+			 N_("include Git's build options")),
+		OPT_END(),
+	};
+	const char * const usage[] = {
+		N_("scalar verbose [-v | --verbose] [--build-options]"),
+		NULL
+	};
+	struct strbuf buf = STRBUF_INIT;
+
+	argc = parse_options(argc, argv, NULL, options,
+			     usage, 0);
+
+	if (argc != 0)
+		usage_with_options(usage, options);
+
+	get_version_info(&buf, build_options);
+	fprintf(stderr, "%s\n", buf.buf);
+	strbuf_release(&buf);
+
+	return 0;
+}
+
 static struct {
 	const char *name;
 	int (*fn)(int, const char **);
@@ -759,6 +797,7 @@  static struct {
 	{ "run", cmd_run },
 	{ "reconfigure", cmd_reconfigure },
 	{ "delete", cmd_delete },
+	{ "version", cmd_version },
 	{ NULL, NULL},
 };