1 files changed, 81 insertions, 0 deletions
diff --git a/hash-object.c b/hash-object.c
new file mode 100644
index 0000000..18f5017
--- /dev/null
+++ b/hash-object.c
@@ -0,0 +1,81 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ * Copyright (C) Junio C Hamano, 2005
+ */
+#include "cache.h"
+#include "blob.h"
+
+static void hash_object(const char *path, enum object_type type, int write_object)
+{
+	int fd;
+	struct stat st;
+	unsigned char sha1[20];
+	fd = open(path, O_RDONLY);
+	if (fd < 0 ||
+	    fstat(fd, &st) < 0 ||
+	    index_fd(sha1, fd, &st, write_object, type, path))
+		die(write_object
+		    ? "Unable to add %s to database"
+		    : "Unable to hash %s", path);
+	printf("%s\n", sha1_to_hex(sha1));
+}
+
+static void hash_stdin(const char *type, int write_object)
+{
+	unsigned char sha1[20];
+	if (index_pipe(sha1, 0, type, write_object))
+		die("Unable to add stdin to database");
+	printf("%s\n", sha1_to_hex(sha1));
+}
+
+static const char hash_object_usage[] =
+"git-hash-object [-t <type>] [-w] [--stdin] <file>...";
+
+int main(int argc, char **argv)
+{
+	int i;
+	const char *type = blob_type;
+	int write_object = 0;
+	const char *prefix = NULL;
+	int prefix_length = -1;
+	int no_more_flags = 0;
+
+	for (i = 1 ; i < argc; i++) {
+		if (!no_more_flags && argv[i][0] == '-') {
+			if (!strcmp(argv[i], "-t")) {
+				if (argc <= ++i)
+					usage(hash_object_usage);
+				type = argv[i];
+			}
+			else if (!strcmp(argv[i], "-w")) {
+				if (prefix_length < 0) {
+					prefix = setup_git_directory();
+					prefix_length =
+						prefix ? strlen(prefix) : 0;
+				}
+				write_object = 1;
+			}
+			else if (!strcmp(argv[i], "--")) {
+				no_more_flags = 1;
+			}
+			else if (!strcmp(argv[i], "--help"))
+				usage(hash_object_usage);
+			else if (!strcmp(argv[i], "--stdin")) {
+				hash_stdin(type, write_object);
+			}
+			else
+				usage(hash_object_usage);
+		}
+		else {
+			const char *arg = argv[i];
+			if (0 <= prefix_length)
+				arg = prefix_filename(prefix, prefix_length,
+						      arg);
+			hash_object(arg, type_from_string(type), write_object);
+			no_more_flags = 1;
+		}
+	}
+	return 0;
+}