write-tree --ignore-cache-tree

This allows you to discard the cache-tree information before writing the
tree out of the index (i.e. it always recomputes the tree object names for
all the subtrees).

This is only useful as a debug option, so I did not bother documenting it.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin-write-tree.c b/builtin-write-tree.c
index 9d640508dd8eb62201b286490b7f83486470d611..3a24ce8157be7c4209d831027693653b8d65ca13 100644 (file)
--- a/builtin-write-tree.c
+++ b/builtin-write-tree.c
@@ -13,7 +13,7 @@ static const char write_tree_usage[] =
 
 int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
 {
-       int missing_ok = 0, ret;
+       int flags = 0, ret;
        const char *prefix = NULL;
        unsigned char sha1[20];
        const char *me = "git-write-tree";
@@ -22,9 +22,15 @@ int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
        while (1 < argc) {
                const char *arg = argv[1];
                if (!strcmp(arg, "--missing-ok"))
-                       missing_ok = 1;
+                       flags |= WRITE_TREE_MISSING_OK;
                else if (!prefixcmp(arg, "--prefix="))
                        prefix = arg + 9;
+               else if (!prefixcmp(arg, "--ignore-cache-tree"))
+                       /*
+                        * This is only useful for debugging, so I
+                        * do not bother documenting it.
+                        */
+                       flags |= WRITE_TREE_IGNORE_CACHE_TREE;
                else
                        usage(write_tree_usage);
                argc--; argv++;
@@ -33,7 +39,7 @@ int cmd_write_tree(int argc, const char **argv, const char *unused_prefix)
        if (argc > 2)
                die("too many options");
 
-       ret = write_cache_as_tree(sha1, missing_ok, prefix);
+       ret = write_cache_as_tree(sha1, flags, prefix);
        switch (ret) {
        case 0:
                printf("%s\n", sha1_to_hex(sha1));

diff --git a/cache-tree.c b/cache-tree.c
index 37bf35e636f0966662416f0693dbea5c1cc73311..6dd8411945c77568373e8a354b925926952f147c 100644 (file)
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -538,28 +538,32 @@ static struct cache_tree *cache_tree_find(struct cache_tree *it, const char *pat
        return it;
 }
 
-int write_cache_as_tree(unsigned char *sha1, int missing_ok, const char *prefix)
+int write_cache_as_tree(unsigned char *sha1, int flags, const char *prefix)
 {
        int entries, was_valid, newfd;
+       struct lock_file *lock_file;
 
        /*
         * We can't free this memory, it becomes part of a linked list
         * parsed atexit()
         */
-       struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
+       lock_file = xcalloc(1, sizeof(struct lock_file));
 
        newfd = hold_locked_index(lock_file, 1);
 
        entries = read_cache();
        if (entries < 0)
                return WRITE_TREE_UNREADABLE_INDEX;
+       if (flags & WRITE_TREE_IGNORE_CACHE_TREE)
+               cache_tree_free(&(active_cache_tree));
 
        if (!active_cache_tree)
                active_cache_tree = cache_tree();
 
        was_valid = cache_tree_fully_valid(active_cache_tree);
-
        if (!was_valid) {
+               int missing_ok = flags & WRITE_TREE_MISSING_OK;
+
                if (cache_tree_update(active_cache_tree,
                                      active_cache, active_nr,
                                      missing_ok, 0) < 0)

diff --git a/cache-tree.h b/cache-tree.h
index e95883523633a51f833683e96af1738da2868238..eadcad8adc943233637367e5489c0e5d2fda6e2d 100644 (file)
--- a/cache-tree.h
+++ b/cache-tree.h
@@ -30,11 +30,16 @@ struct cache_tree *cache_tree_read(const char *buffer, unsigned long size);
 int cache_tree_fully_valid(struct cache_tree *);
 int cache_tree_update(struct cache_tree *, struct cache_entry **, int, int, int);
 
+/* bitmasks to write_cache_as_tree flags */
+#define WRITE_TREE_MISSING_OK 1
+#define WRITE_TREE_IGNORE_CACHE_TREE 2
+
+/* error return codes */
 #define WRITE_TREE_UNREADABLE_INDEX (-1)
 #define WRITE_TREE_UNMERGED_INDEX (-2)
 #define WRITE_TREE_PREFIX_ERROR (-3)
 
-int write_cache_as_tree(unsigned char *sha1, int missing_ok, const char *prefix);
+int write_cache_as_tree(unsigned char *sha1, int flags, const char *prefix);
 void prime_cache_tree(struct cache_tree **, struct tree *);
 
 #endif