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authorPetr Baudis <pasky@ucw.cz>2005-04-13 02:02:34 -0700
committerPetr Baudis <xpasky@machine>2005-04-13 02:02:34 -0700
commit7912c07037cf704394e9bcb7cb24c05ee03aa921 (patch)
tree69bfdfa541c368a47a86482dfe66e488b152fe3d /ls-tree.c
parentc57a3a91f1cc0d037e7b7992cbfa6f4213dcf37e (diff)
downloadgit-7912c07037cf704394e9bcb7cb24c05ee03aa921.tar.gz
git-7912c07037cf704394e9bcb7cb24c05ee03aa921.tar.xz
[PATCH] ls-tree for listing trees
ls-tree tool provides just a way to export the binary tree objects to a usable text format. This is bound to be useful in variety of scripts, although none of those I have currently uses it. But e.g. the simple script I've sent to HPA for purging the object database uses it. Signed-off-by: Petr Baudis <pasky@ucw.cz>
Diffstat (limited to 'ls-tree.c')
-rw-r--r--ls-tree.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/ls-tree.c b/ls-tree.c
new file mode 100644
index 000000000..05c743ab6
--- /dev/null
+++ b/ls-tree.c
@@ -0,0 +1,53 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "cache.h"
+
+static int list(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;
+ unsigned char *type;
+
+ if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
+ usage("corrupt 'tree' file");
+ buffer = sha1 + 20;
+ size -= len + 20;
+ /* XXX: We do some ugly mode heuristics here.
+ * It seems not worth it to read each file just to get this
+ * and the file size. -- pasky@ucw.cz */
+ type = S_ISDIR(mode) ? "tree" : "blob";
+ printf("%03o\t%s\t%s\t%s\n", mode, type, sha1_to_hex(sha1), path);
+ }
+ return 0;
+}
+
+int main(int argc, char **argv)
+{
+ unsigned char sha1[20];
+
+ if (argc != 2)
+ usage("ls-tree <key>");
+ if (get_sha1_hex(argv[1], sha1) < 0)
+ usage("ls-tree <key>");
+ sha1_file_directory = getenv(DB_ENVIRONMENT);
+ if (!sha1_file_directory)
+ sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
+ if (list(sha1) < 0)
+ usage("list failed");
+ return 0;
+}