#include "cache.h"
#include "tree-walk.h"
+#include "xdiff-interface.h"
#include "blob.h"
static const char merge_tree_usage[] = "git-merge-tree <base-tree> <branch1> <branch2>";
return "removed in remote";
}
+extern void *merge_file(struct blob *, struct blob *, struct blob *, unsigned long *);
+
+static void *result(struct merge_list *entry, unsigned long *size)
+{
+ enum object_type type;
+ struct blob *base, *our, *their;
+
+ if (!entry->stage)
+ return read_sha1_file(entry->blob->object.sha1, &type, size);
+ base = NULL;
+ if (entry->stage == 1) {
+ base = entry->blob;
+ entry = entry->link;
+ }
+ our = NULL;
+ if (entry && entry->stage == 2) {
+ our = entry->blob;
+ entry = entry->link;
+ }
+ their = NULL;
+ if (entry)
+ their = entry->blob;
+ return merge_file(base, our, their, size);
+}
+
+static void *origin(struct merge_list *entry, unsigned long *size)
+{
+ enum object_type type;
+ while (entry) {
+ if (entry->stage == 2)
+ return read_sha1_file(entry->blob->object.sha1, &type, size);
+ entry = entry->link;
+ }
+ return NULL;
+}
+
+static int show_outf(void *priv_, mmbuffer_t *mb, int nbuf)
+{
+ int i;
+ for (i = 0; i < nbuf; i++)
+ printf("%.*s", (int) mb[i].size, mb[i].ptr);
+ return 0;
+}
+
+static void show_diff(struct merge_list *entry)
+{
+ unsigned long size;
+ mmfile_t src, dst;
+ xpparam_t xpp;
+ xdemitconf_t xecfg;
+ xdemitcb_t ecb;
+
+ xpp.flags = XDF_NEED_MINIMAL;
+ memset(&xecfg, 0, sizeof(xecfg));
+ xecfg.ctxlen = 3;
+ ecb.outf = show_outf;
+ ecb.priv = NULL;
+
+ src.ptr = origin(entry, &size);
+ if (!src.ptr)
+ size = 0;
+ src.size = size;
+ dst.ptr = result(entry, &size);
+ if (!dst.ptr)
+ size = 0;
+ dst.size = size;
+ xdi_diff(&src, &dst, &xpp, &xecfg, &ecb);
+ free(src.ptr);
+ free(dst.ptr);
+}
+
static void show_result_list(struct merge_list *entry)
{
printf("%s\n", explanation(entry));
walk = merge_result;
while (walk) {
show_result_list(walk);
+ show_diff(walk);
walk = walk->next;
}
}
{
return a->sha1 &&
b->sha1 &&
- !memcmp(a->sha1, b->sha1, 20) &&
+ !hashcmp(a->sha1, b->sha1) &&
a->mode == b->mode;
}
static struct merge_list *create_entry(unsigned stage, unsigned mode, const unsigned char *sha1, const char *path)
{
- struct merge_list *res = xmalloc(sizeof(*res));
+ struct merge_list *res = xcalloc(1, sizeof(*res));
- memset(res, 0, sizeof(*res));
res->stage = stage;
res->path = path;
res->mode = mode;
return res;
}
-static void resolve(const char *base, struct name_entry *branch1, struct name_entry *result)
+static char *traverse_path(const struct traverse_info *info, const struct name_entry *n)
+{
+ char *path = xmalloc(traverse_path_len(info, n) + 1);
+ return make_traverse_path(path, info, n);
+}
+
+static void resolve(const struct traverse_info *info, struct name_entry *branch1, struct name_entry *result)
{
struct merge_list *orig, *final;
const char *path;
if (!branch1)
return;
- path = strdup(mkpath("%s%s", base, result->path));
+ path = traverse_path(info, result);
orig = create_entry(2, branch1->mode, branch1->sha1, path);
final = create_entry(0, result->mode, result->sha1, path);
add_merge_entry(final);
}
-static int unresolved_directory(const char *base, struct name_entry n[3])
+static int unresolved_directory(const struct traverse_info *info, struct name_entry n[3])
{
- int baselen;
char *newbase;
struct name_entry *p;
struct tree_desc t[3];
}
if (!S_ISDIR(p->mode))
return 0;
- baselen = strlen(base);
- newbase = xmalloc(baselen + p->pathlen + 2);
- memcpy(newbase, base, baselen);
- memcpy(newbase + baselen, p->path, p->pathlen);
- memcpy(newbase + baselen + p->pathlen, "/", 2);
-
+ newbase = traverse_path(info, p);
buf0 = fill_tree_descriptor(t+0, n[0].sha1);
buf1 = fill_tree_descriptor(t+1, n[1].sha1);
buf2 = fill_tree_descriptor(t+2, n[2].sha1);
}
-static struct merge_list *link_entry(unsigned stage, const char *base, struct name_entry *n, struct merge_list *entry)
+static struct merge_list *link_entry(unsigned stage, const struct traverse_info *info, struct name_entry *n, struct merge_list *entry)
{
const char *path;
struct merge_list *link;
if (entry)
path = entry->path;
else
- path = strdup(mkpath("%s%s", base, n->path));
+ path = traverse_path(info, n);
link = create_entry(stage, n->mode, n->sha1, path);
link->link = entry;
return link;
}
-static void unresolved(const char *base, struct name_entry n[3])
+static void unresolved(const struct traverse_info *info, struct name_entry n[3])
{
struct merge_list *entry = NULL;
- if (unresolved_directory(base, n))
+ if (unresolved_directory(info, n))
return;
/*
* list has the stages in order - link_entry adds new
* links at the front.
*/
- entry = link_entry(3, base, n + 2, entry);
- entry = link_entry(2, base, n + 1, entry);
- entry = link_entry(1, base, n + 0, entry);
+ entry = link_entry(3, info, n + 2, entry);
+ entry = link_entry(2, info, n + 1, entry);
+ entry = link_entry(1, info, n + 0, entry);
add_merge_entry(entry);
}
* The successful merge rules are the same as for the three-way merge
* in git-read-tree.
*/
-static void threeway_callback(int n, unsigned long mask, struct name_entry *entry, const char *base)
+static int threeway_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *entry, struct traverse_info *info)
{
/* Same in both? */
if (same_entry(entry+1, entry+2)) {
if (entry[0].sha1) {
- resolve(base, NULL, entry+1);
- return;
+ resolve(info, NULL, entry+1);
+ return mask;
}
}
if (same_entry(entry+0, entry+1)) {
if (entry[2].sha1 && !S_ISDIR(entry[2].mode)) {
- resolve(base, entry+1, entry+2);
- return;
+ resolve(info, entry+1, entry+2);
+ return mask;
}
}
if (same_entry(entry+0, entry+2)) {
if (entry[1].sha1 && !S_ISDIR(entry[1].mode)) {
- resolve(base, NULL, entry+1);
- return;
+ resolve(info, NULL, entry+1);
+ return mask;
}
}
- unresolved(base, entry);
+ unresolved(info, entry);
+ return mask;
}
static void merge_trees(struct tree_desc t[3], const char *base)
{
- traverse_trees(3, t, base, threeway_callback);
+ struct traverse_info info;
+
+ setup_traverse_info(&info, base);
+ info.fn = threeway_callback;
+ traverse_trees(3, t, &info);
}
static void *get_tree_descriptor(struct tree_desc *desc, const char *rev)
struct tree_desc t[3];
void *buf1, *buf2, *buf3;
- if (argc < 4)
+ if (argc != 4)
usage(merge_tree_usage);
+ setup_git_directory();
+
buf1 = get_tree_descriptor(t+0, argv[1]);
buf2 = get_tree_descriptor(t+1, argv[2]);
buf3 = get_tree_descriptor(t+2, argv[3]);