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authorLukas Sandström <lukass@etek.chalmers.se>2006-06-13 20:21:42 (GMT)
committerJunio C Hamano <junkio@cox.net>2006-06-19 04:58:19 (GMT)
commit8ed05fb5e90f8ad2051ff7071b7425a53c594892 (patch)
tree9bb4dc703c2405344165d6d2da56d84e877fa12c /builtin-write-tree.c
parent64e86c57867593ba0ee77a7b0ff0eb8e9d4d8ed5 (diff)
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Make git-write-tree a builtin
Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se> Signed-off-by: Junio C Hamano <junkio@cox.net>
Diffstat (limited to 'builtin-write-tree.c')
-rw-r--r--builtin-write-tree.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/builtin-write-tree.c b/builtin-write-tree.c
new file mode 100644
index 0000000..c3aac36
--- /dev/null
+++ b/builtin-write-tree.c
@@ -0,0 +1,88 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "builtin.h"
+#include "cache.h"
+#include "tree.h"
+#include "cache-tree.h"
+
+static const char write_tree_usage[] =
+"git-write-tree [--missing-ok] [--prefix=<prefix>/]";
+
+int write_tree(unsigned char *sha1, int missing_ok, const char *prefix)
+{
+ int entries, was_valid, newfd;
+
+ /* We can't free this memory, it becomes part of a linked list parsed atexit() */
+ struct lock_file *lock_file = xmalloc(sizeof(struct lock_file));
+
+ newfd = hold_lock_file_for_update(lock_file, get_index_file());
+
+ entries = read_cache();
+ if (entries < 0)
+ die("git-write-tree: error reading cache");
+
+ if (!active_cache_tree)
+ active_cache_tree = cache_tree();
+
+ was_valid = cache_tree_fully_valid(active_cache_tree);
+
+ if (!was_valid) {
+ if (cache_tree_update(active_cache_tree,
+ active_cache, active_nr,
+ missing_ok, 0) < 0)
+ die("git-write-tree: error building trees");
+ if (0 <= newfd) {
+ if (!write_cache(newfd, active_cache, active_nr))
+ commit_lock_file(lock_file);
+ }
+ /* Not being able to write is fine -- we are only interested
+ * in updating the cache-tree part, and if the next caller
+ * ends up using the old index with unupdated cache-tree part
+ * it misses the work we did here, but that is just a
+ * performance penalty and not a big deal.
+ */
+ }
+
+ if (prefix) {
+ struct cache_tree *subtree =
+ cache_tree_find(active_cache_tree, prefix);
+ memcpy(sha1, subtree->sha1, 20);
+ }
+ else
+ memcpy(sha1, active_cache_tree->sha1, 20);
+
+ rollback_lock_file(lock_file);
+
+ return 0;
+}
+
+int cmd_write_tree(int argc, const char **argv, char **envp)
+{
+ int missing_ok = 0, ret;
+ const char *prefix = NULL;
+ unsigned char sha1[20];
+
+ setup_git_directory();
+
+ while (1 < argc) {
+ const char *arg = argv[1];
+ if (!strcmp(arg, "--missing-ok"))
+ missing_ok = 1;
+ else if (!strncmp(arg, "--prefix=", 9))
+ prefix = arg + 9;
+ else
+ die(write_tree_usage);
+ argc--; argv++;
+ }
+
+ if (argc > 2)
+ die("too many options");
+
+ ret = write_tree(sha1, missing_ok, prefix);
+ printf("%s\n", sha1_to_hex(sha1));
+
+ return ret;
+}