From b53258182bf90b4fb922a20d164a02e6f0e9afd1 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 22 Jan 2010 07:38:03 -0800
Subject: make "git unpack-file" a built-in

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Makefile b/Makefile
index c5a1190..88e2f8f 100644
--- a/Makefile
+++ b/Makefile
@@ -392,7 +392,6 @@ PROGRAMS += git-index-pack$X
 PROGRAMS += git-pack-redundant$X
 PROGRAMS += git-shell$X
 PROGRAMS += git-show-index$X
-PROGRAMS += git-unpack-file$X
 PROGRAMS += git-upload-pack$X
 PROGRAMS += git-http-backend$X
 
@@ -698,6 +697,7 @@ BUILTIN_OBJS += builtin-stripspace.o
 BUILTIN_OBJS += builtin-symbolic-ref.o
 BUILTIN_OBJS += builtin-tag.o
 BUILTIN_OBJS += builtin-tar-tree.o
+BUILTIN_OBJS += builtin-unpack-file.o
 BUILTIN_OBJS += builtin-unpack-objects.o
 BUILTIN_OBJS += builtin-update-index.o
 BUILTIN_OBJS += builtin-update-ref.o
diff --git a/builtin-unpack-file.c b/builtin-unpack-file.c
new file mode 100644
index 0000000..608590a
--- /dev/null
+++ b/builtin-unpack-file.c
@@ -0,0 +1,38 @@
+#include "cache.h"
+#include "blob.h"
+#include "exec_cmd.h"
+
+static char *create_temp_file(unsigned char *sha1)
+{
+	static char path[50];
+	void *buf;
+	enum object_type type;
+	unsigned long size;
+	int fd;
+
+	buf = read_sha1_file(sha1, &type, &size);
+	if (!buf || type != OBJ_BLOB)
+		die("unable to read blob object %s", sha1_to_hex(sha1));
+
+	strcpy(path, ".merge_file_XXXXXX");
+	fd = xmkstemp(path);
+	if (write_in_full(fd, buf, size) != size)
+		die_errno("unable to write temp-file");
+	close(fd);
+	return path;
+}
+
+int cmd_unpack_file(int argc, const char **argv, const char *prefix)
+{
+	unsigned char sha1[20];
+
+	if (argc != 2 || !strcmp(argv[1], "-h"))
+		usage("git unpack-file <sha1>");
+	if (get_sha1(argv[1], sha1))
+		die("Not a valid object name %s", argv[1]);
+
+	git_config(git_default_config, NULL);
+
+	puts(create_temp_file(sha1));
+	return 0;
+}
diff --git a/builtin.h b/builtin.h
index 2aaef74..d4fec89 100644
--- a/builtin.h
+++ b/builtin.h
@@ -103,6 +103,7 @@ extern int cmd_stripspace(int argc, const char **argv, const char *prefix);
 extern int cmd_symbolic_ref(int argc, const char **argv, const char *prefix);
 extern int cmd_tag(int argc, const char **argv, const char *prefix);
 extern int cmd_tar_tree(int argc, const char **argv, const char *prefix);
+extern int cmd_unpack_file(int argc, const char **argv, const char *prefix);
 extern int cmd_unpack_objects(int argc, const char **argv, const char *prefix);
 extern int cmd_update_index(int argc, const char **argv, const char *prefix);
 extern int cmd_update_ref(int argc, const char **argv, const char *prefix);
diff --git a/git.c b/git.c
index 0b8f8a7..832bd2d 100644
--- a/git.c
+++ b/git.c
@@ -370,6 +370,7 @@ static void handle_internal_command(int argc, const char **argv)
 		{ "symbolic-ref", cmd_symbolic_ref, RUN_SETUP },
 		{ "tag", cmd_tag, RUN_SETUP },
 		{ "tar-tree", cmd_tar_tree },
+		{ "unpack-file", cmd_unpack_file, RUN_SETUP },
 		{ "unpack-objects", cmd_unpack_objects, RUN_SETUP },
 		{ "update-index", cmd_update_index, RUN_SETUP },
 		{ "update-ref", cmd_update_ref, RUN_SETUP },
diff --git a/unpack-file.c b/unpack-file.c
deleted file mode 100644
index e9d8934..0000000
--- a/unpack-file.c
+++ /dev/null
@@ -1,41 +0,0 @@
-#include "cache.h"
-#include "blob.h"
-#include "exec_cmd.h"
-
-static char *create_temp_file(unsigned char *sha1)
-{
-	static char path[50];
-	void *buf;
-	enum object_type type;
-	unsigned long size;
-	int fd;
-
-	buf = read_sha1_file(sha1, &type, &size);
-	if (!buf || type != OBJ_BLOB)
-		die("unable to read blob object %s", sha1_to_hex(sha1));
-
-	strcpy(path, ".merge_file_XXXXXX");
-	fd = xmkstemp(path);
-	if (write_in_full(fd, buf, size) != size)
-		die_errno("unable to write temp-file");
-	close(fd);
-	return path;
-}
-
-int main(int argc, char **argv)
-{
-	unsigned char sha1[20];
-
-	git_extract_argv0_path(argv[0]);
-
-	if (argc != 2 || !strcmp(argv[1], "-h"))
-		usage("git unpack-file <sha1>");
-	if (get_sha1(argv[1], sha1))
-		die("Not a valid object name %s", argv[1]);
-
-	setup_git_directory();
-	git_config(git_default_config, NULL);
-
-	puts(create_temp_file(sha1));
-	return 0;
-}
-- 
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