#include "cache.h"
-#include "diff.h"
+#include "tree-walk.h"
static const char merge_tree_usage[] = "git-merge-tree <base-tree> <branch1> <branch2>";
static int resolve_directories = 1;
static void merge_trees(struct tree_desc t[3], const char *base);
-static void *fill_tree_descriptor(struct tree_desc *desc, const unsigned char *sha1)
-{
- unsigned long size = 0;
- void *buf = NULL;
-
- if (sha1) {
- buf = read_object_with_reference(sha1, "tree", &size, NULL);
- if (!buf)
- die("unable to read tree %s", sha1_to_hex(sha1));
- }
- desc->size = size;
- desc->buf = buf;
- return buf;
-}
-
-struct name_entry {
- const unsigned char *sha1;
- const char *path;
- unsigned int mode;
- int pathlen;
-};
-
-static void entry_clear(struct name_entry *a)
-{
- memset(a, 0, sizeof(*a));
-}
-
-static int entry_compare(struct name_entry *a, struct name_entry *b)
-{
- return base_name_compare(
- a->path, a->pathlen, a->mode,
- b->path, b->pathlen, b->mode);
-}
-
-static void entry_extract(struct tree_desc *t, struct name_entry *a)
-{
- a->sha1 = tree_entry_extract(t, &a->path, &a->mode);
- a->pathlen = strlen(a->path);
-}
-
/* An empty entry never compares same, not even to another empty entry */
static int same_entry(struct name_entry *a, struct name_entry *b)
{
static void resolve(const char *base, struct name_entry *branch1, struct name_entry *result)
{
- char branch1_sha1[50];
-
/* If it's already branch1, don't bother showing it */
if (!branch1)
return;
- memcpy(branch1_sha1, sha1_to_hex_zero(branch1->sha1), 41);
printf("0 %06o->%06o %s->%s %s%s\n",
branch1->mode, result->mode,
- branch1_sha1, sha1_to_hex_zero(result->sha1),
+ sha1_to_hex_zero(branch1->sha1),
+ sha1_to_hex_zero(result->sha1),
base, result->path);
}
printf("3 %06o %s %s%s\n", n[2].mode, sha1_to_hex(n[2].sha1), base, n[2].path);
}
-typedef void (*traverse_callback_t)(int n, unsigned long mask, struct name_entry *entry, const char *base);
-
-static void traverse_trees(int n, struct tree_desc *t, const char *base, traverse_callback_t callback)
-{
- struct name_entry *entry = xmalloc(n*sizeof(*entry));
-
- for (;;) {
- struct name_entry entry[3];
- unsigned long mask = 0;
- int i, last;
-
- last = -1;
- for (i = 0; i < n; i++) {
- if (!t[i].size)
- continue;
- entry_extract(t+i, entry+i);
- if (last >= 0) {
- int cmp = entry_compare(entry+i, entry+last);
-
- /*
- * Is the new name bigger than the old one?
- * Ignore it
- */
- if (cmp > 0)
- continue;
- /*
- * Is the new name smaller than the old one?
- * Ignore all old ones
- */
- if (cmp < 0)
- mask = 0;
- }
- mask |= 1ul << i;
- last = i;
- }
- if (!mask)
- break;
-
- /*
- * Update the tree entries we've walked, and clear
- * all the unused name-entries.
- */
- for (i = 0; i < n; i++) {
- if (mask & (1ul << i)) {
- update_tree_entry(t+i);
- continue;
- }
- entry_clear(entry + i);
- }
- callback(n, mask, entry, base);
- }
- free(entry);
-}
-
/*
* Merge two trees together (t[1] and t[2]), using a common base (t[0])
* as the origin.
unsigned char sha1[20];
void *buf;
- if (get_sha1(rev, sha1) < 0)
+ if (get_sha1(rev, sha1))
die("unknown rev %s", rev);
buf = fill_tree_descriptor(desc, sha1);
if (!buf)