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-rw-r--r--builtin/unpack-file.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/builtin/unpack-file.c b/builtin/unpack-file.c
new file mode 100644
index 0000000..c129e2b
--- /dev/null
+++ b/builtin/unpack-file.c
@@ -0,0 +1,41 @@
+#include "builtin.h"
+#include "config.h"
+#include "hex.h"
+#include "object-name.h"
+#include "object-store-ll.h"
+
+static char *create_temp_file(struct object_id *oid)
+{
+ static char path[50];
+ void *buf;
+ enum object_type type;
+ unsigned long size;
+ int fd;
+
+ buf = repo_read_object_file(the_repository, oid, &type, &size);
+ if (!buf || type != OBJ_BLOB)
+ die("unable to read blob object %s", oid_to_hex(oid));
+
+ xsnprintf(path, sizeof(path), ".merge_file_XXXXXX");
+ fd = xmkstemp(path);
+ if (write_in_full(fd, buf, size) < 0)
+ die_errno("unable to write temp-file");
+ close(fd);
+ free(buf);
+ return path;
+}
+
+int cmd_unpack_file(int argc, const char **argv, const char *prefix UNUSED)
+{
+ struct object_id oid;
+
+ if (argc != 2 || !strcmp(argv[1], "-h"))
+ usage("git unpack-file <blob>");
+ if (repo_get_oid(the_repository, argv[1], &oid))
+ die("Not a valid object name %s", argv[1]);
+
+ git_config(git_default_config, NULL);
+
+ puts(create_temp_file(&oid));
+ return 0;
+}