1 files changed, 136 insertions, 0 deletions
diff --git a/hash-object.c b/hash-object.c
new file mode 100644
index 0000000000..48d5223684
--- /dev/null
+++ b/hash-object.c
@@ -0,0 +1,136 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ * Copyright (C) Junio C Hamano, 2005
+ */
+#include "cache.h"
+#include "blob.h"
+#include "quote.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));
+	maybe_flush_or_die(stdout, "hash to stdout");
+}
+
+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 void hash_stdin_paths(const char *type, int write_objects)
+{
+	struct strbuf buf, nbuf;
+
+	strbuf_init(&buf, 0);
+	strbuf_init(&nbuf, 0);
+	while (strbuf_getline(&buf, stdin, '\n') != EOF) {
+		if (buf.buf[0] == '"') {
+			strbuf_reset(&nbuf);
+			if (unquote_c_style(&nbuf, buf.buf, NULL))
+				die("line is badly quoted");
+			strbuf_swap(&buf, &nbuf);
+		}
+		hash_object(buf.buf, type_from_string(type), write_objects);
+	}
+	strbuf_release(&buf);
+	strbuf_release(&nbuf);
+}
+
+static const char hash_object_usage[] =
+"git-hash-object [ [-t <type>] [-w] [--stdin] <file>... | --stdin-paths < <list-of-paths> ]";
+
+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;
+	int hashstdin = 0;
+	int stdin_paths = 0;
+
+	git_config(git_default_config, NULL);
+
+	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-paths")) {
+				if (hashstdin) {
+					error("Can't use --stdin-paths with --stdin");
+					usage(hash_object_usage);
+				}
+				stdin_paths = 1;
+
+			}
+			else if (!strcmp(argv[i], "--stdin")) {
+				if (stdin_paths) {
+					error("Can't use %s with --stdin-paths", argv[i]);
+					usage(hash_object_usage);
+				}
+				if (hashstdin)
+					die("Multiple --stdin arguments are not supported");
+				hashstdin = 1;
+			}
+			else
+				usage(hash_object_usage);
+		}
+		else {
+			const char *arg = argv[i];
+
+			if (stdin_paths) {
+				error("Can't specify files (such as \"%s\") with --stdin-paths", arg);
+				usage(hash_object_usage);
+			}
+
+			if (hashstdin) {
+				hash_stdin(type, write_object);
+				hashstdin = 0;
+			}
+			if (0 <= prefix_length)
+				arg = prefix_filename(prefix, prefix_length,
+						      arg);
+			hash_object(arg, type_from_string(type), write_object);
+			no_more_flags = 1;
+		}
+	}
+
+	if (stdin_paths)
+		hash_stdin_paths(type, write_object);
+
+	if (hashstdin)
+		hash_stdin(type, write_object);
+	return 0;
+}