Initial revision of "git", the information manager from hell

1 files changed, 43 insertions, 0 deletions

diff --git a/read-tree.c b/read-tree.c
new file mode 100644
index 0000000000..1b47742d8c
--- /dev/null
+++ b/read-tree.c
@@ -0,0 +1,43 @@
+#include "cache.h"
+
+static int unpack(unsigned char *sha1)
+{
+	void *buffer;
+	unsigned long size;
+	char type[20];
+
+	buffer = read_sha1_file(sha1, type, &size);
+	if (!buffer)
+		usage("unable to read sha1 file");
+	if (strcmp(type, "tree"))
+		usage("expected a 'tree' node");
+	while (size) {
+		int len = strlen(buffer)+1;
+		unsigned char *sha1 = buffer + len;
+		char *path = strchr(buffer, ' ')+1;
+		unsigned int mode;
+		if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
+			usage("corrupt 'tree' file");
+		buffer = sha1 + 20;
+		size -= len + 20;
+		printf("%o %s (%s)\n", mode, path, sha1_to_hex(sha1));
+	}
+	return 0;
+}
+
+int main(int argc, char **argv)
+{
+	int fd;
+	unsigned char sha1[20];
+
+	if (argc != 2)
+		usage("read-tree <key>");
+	if (get_sha1_hex(argv[1], sha1) < 0)
+		usage("read-tree <key>");
+	sha1_file_directory = getenv(DB_ENVIRONMENT);
+	if (!sha1_file_directory)
+		sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
+	if (unpack(sha1) < 0)
+		usage("unpack failed");
+	return 0;
+}