1 files changed, 0 insertions, 390 deletions

diff --git a/third_party/git/builtin/merge-tree.c b/third_party/git/builtin/merge-tree.c
deleted file mode 100644
index e72714a5a87d..000000000000
--- a/third_party/git/builtin/merge-tree.c
+++ /dev/null
@@ -1,390 +0,0 @@
-#define USE_THE_INDEX_COMPATIBILITY_MACROS
-#include "builtin.h"
-#include "tree-walk.h"
-#include "xdiff-interface.h"
-#include "object-store.h"
-#include "repository.h"
-#include "blob.h"
-#include "exec-cmd.h"
-#include "merge-blobs.h"
-
-static const char merge_tree_usage[] = "git merge-tree <base-tree> <branch1> <branch2>";
-
-struct merge_list {
-	struct merge_list *next;
-	struct merge_list *link;	/* other stages for this object */
-
-	unsigned int stage : 2;
-	unsigned int mode;
-	const char *path;
-	struct blob *blob;
-};
-
-static struct merge_list *merge_result, **merge_result_end = &merge_result;
-
-static void add_merge_entry(struct merge_list *entry)
-{
-	*merge_result_end = entry;
-	merge_result_end = &entry->next;
-}
-
-static void merge_trees(struct tree_desc t[3], const char *base);
-
-static const char *explanation(struct merge_list *entry)
-{
-	switch (entry->stage) {
-	case 0:
-		return "merged";
-	case 3:
-		return "added in remote";
-	case 2:
-		if (entry->link)
-			return "added in both";
-		return "added in local";
-	}
-
-	/* Existed in base */
-	entry = entry->link;
-	if (!entry)
-		return "removed in both";
-
-	if (entry->link)
-		return "changed in both";
-
-	if (entry->stage == 3)
-		return "removed in local";
-	return "removed in remote";
-}
-
-static void *result(struct merge_list *entry, unsigned long *size)
-{
-	enum object_type type;
-	struct blob *base, *our, *their;
-	const char *path = entry->path;
-
-	if (!entry->stage)
-		return read_object_file(&entry->blob->object.oid, &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_blobs(the_repository->index, path,
-			   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_object_file(&entry->blob->object.oid,
-						&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 = 0;
-	memset(&xecfg, 0, sizeof(xecfg));
-	xecfg.ctxlen = 3;
-	ecb.out_hunk = NULL;
-	ecb.out_line = 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;
-	if (xdi_diff(&src, &dst, &xpp, &xecfg, &ecb))
-		die("unable to generate diff");
-	free(src.ptr);
-	free(dst.ptr);
-}
-
-static void show_result_list(struct merge_list *entry)
-{
-	printf("%s\n", explanation(entry));
-	do {
-		struct merge_list *link = entry->link;
-		static const char *desc[4] = { "result", "base", "our", "their" };
-		printf("  %-6s %o %s %s\n", desc[entry->stage], entry->mode, oid_to_hex(&entry->blob->object.oid), entry->path);
-		entry = link;
-	} while (entry);
-}
-
-static void show_result(void)
-{
-	struct merge_list *walk;
-
-	walk = merge_result;
-	while (walk) {
-		show_result_list(walk);
-		show_diff(walk);
-		walk = walk->next;
-	}
-}
-
-/* An empty entry never compares same, not even to another empty entry */
-static int same_entry(struct name_entry *a, struct name_entry *b)
-{
-	return	!is_null_oid(&a->oid) &&
-		!is_null_oid(&b->oid) &&
-		oideq(&a->oid, &b->oid) &&
-		a->mode == b->mode;
-}
-
-static int both_empty(struct name_entry *a, struct name_entry *b)
-{
-	return is_null_oid(&a->oid) && is_null_oid(&b->oid);
-}
-
-static struct merge_list *create_entry(unsigned stage, unsigned mode, const struct object_id *oid, const char *path)
-{
-	struct merge_list *res = xcalloc(1, sizeof(*res));
-
-	res->stage = stage;
-	res->path = path;
-	res->mode = mode;
-	res->blob = lookup_blob(the_repository, oid);
-	return res;
-}
-
-static char *traverse_path(const struct traverse_info *info, const struct name_entry *n)
-{
-	struct strbuf buf = STRBUF_INIT;
-	strbuf_make_traverse_path(&buf, info, n->path, n->pathlen);
-	return strbuf_detach(&buf, NULL);
-}
-
-static void resolve(const struct traverse_info *info, struct name_entry *ours, struct name_entry *result)
-{
-	struct merge_list *orig, *final;
-	const char *path;
-
-	/* If it's already ours, don't bother showing it */
-	if (!ours)
-		return;
-
-	path = traverse_path(info, result);
-	orig = create_entry(2, ours->mode, &ours->oid, path);
-	final = create_entry(0, result->mode, &result->oid, path);
-
-	final->link = orig;
-
-	add_merge_entry(final);
-}
-
-static void unresolved_directory(const struct traverse_info *info,
-				 struct name_entry n[3])
-{
-	struct repository *r = the_repository;
-	char *newbase;
-	struct name_entry *p;
-	struct tree_desc t[3];
-	void *buf0, *buf1, *buf2;
-
-	for (p = n; p < n + 3; p++) {
-		if (p->mode && S_ISDIR(p->mode))
-			break;
-	}
-	if (n + 3 <= p)
-		return; /* there is no tree here */
-
-	newbase = traverse_path(info, p);
-
-#define ENTRY_OID(e) (((e)->mode && S_ISDIR((e)->mode)) ? &(e)->oid : NULL)
-	buf0 = fill_tree_descriptor(r, t + 0, ENTRY_OID(n + 0));
-	buf1 = fill_tree_descriptor(r, t + 1, ENTRY_OID(n + 1));
-	buf2 = fill_tree_descriptor(r, t + 2, ENTRY_OID(n + 2));
-#undef ENTRY_OID
-
-	merge_trees(t, newbase);
-
-	free(buf0);
-	free(buf1);
-	free(buf2);
-	free(newbase);
-}
-
-
-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 (!n->mode)
-		return entry;
-	if (entry)
-		path = entry->path;
-	else
-		path = traverse_path(info, n);
-	link = create_entry(stage, n->mode, &n->oid, path);
-	link->link = entry;
-	return link;
-}
-
-static void unresolved(const struct traverse_info *info, struct name_entry n[3])
-{
-	struct merge_list *entry = NULL;
-	int i;
-	unsigned dirmask = 0, mask = 0;
-
-	for (i = 0; i < 3; i++) {
-		mask |= (1 << i);
-		/*
-		 * Treat missing entries as directories so that we return
-		 * after unresolved_directory has handled this.
-		 */
-		if (!n[i].mode || S_ISDIR(n[i].mode))
-			dirmask |= (1 << i);
-	}
-
-	unresolved_directory(info, n);
-
-	if (dirmask == mask)
-		return;
-
-	if (n[2].mode && !S_ISDIR(n[2].mode))
-		entry = link_entry(3, info, n + 2, entry);
-	if (n[1].mode && !S_ISDIR(n[1].mode))
-		entry = link_entry(2, info, n + 1, entry);
-	if (n[0].mode && !S_ISDIR(n[0].mode))
-		entry = link_entry(1, info, n + 0, entry);
-
-	add_merge_entry(entry);
-}
-
-/*
- * Merge two trees together (t[1] and t[2]), using a common base (t[0])
- * as the origin.
- *
- * This walks the (sorted) trees in lock-step, checking every possible
- * name. Note that directories automatically sort differently from other
- * files (see "base_name_compare"), so you'll never see file/directory
- * conflicts, because they won't ever compare the same.
- *
- * IOW, if a directory changes to a filename, it will automatically be
- * seen as the directory going away, and the filename being created.
- *
- * Think of this as a three-way diff.
- *
- * The output will be either:
- *  - successful merge
- *	 "0 mode sha1 filename"
- *    NOTE NOTE NOTE! FIXME! We really really need to walk the index
- *    in parallel with this too!
- *
- *  - conflict:
- *	"1 mode sha1 filename"
- *	"2 mode sha1 filename"
- *	"3 mode sha1 filename"
- *    where not all of the 1/2/3 lines may exist, of course.
- *
- * The successful merge rules are the same as for the three-way merge
- * in git-read-tree.
- */
-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) || both_empty(entry+1, entry+2)) {
-		/* Modified, added or removed identically */
-		resolve(info, NULL, entry+1);
-		return mask;
-	}
-
-	if (same_entry(entry+0, entry+1)) {
-		if (!is_null_oid(&entry[2].oid) && !S_ISDIR(entry[2].mode)) {
-			/* We did not touch, they modified -- take theirs */
-			resolve(info, entry+1, entry+2);
-			return mask;
-		}
-		/*
-		 * If we did not touch a directory but they made it
-		 * into a file, we fall through and unresolved()
-		 * recurses down.  Likewise for the opposite case.
-		 */
-	}
-
-	if (same_entry(entry+0, entry+2) || both_empty(entry+0, entry+2)) {
-		/* We added, modified or removed, they did not touch -- take ours */
-		resolve(info, NULL, entry+1);
-		return mask;
-	}
-
-	unresolved(info, entry);
-	return mask;
-}
-
-static void merge_trees(struct tree_desc t[3], const char *base)
-{
-	struct traverse_info info;
-
-	setup_traverse_info(&info, base);
-	info.fn = threeway_callback;
-	traverse_trees(&the_index, 3, t, &info);
-}
-
-static void *get_tree_descriptor(struct repository *r,
-				 struct tree_desc *desc,
-				 const char *rev)
-{
-	struct object_id oid;
-	void *buf;
-
-	if (repo_get_oid(r, rev, &oid))
-		die("unknown rev %s", rev);
-	buf = fill_tree_descriptor(r, desc, &oid);
-	if (!buf)
-		die("%s is not a tree", rev);
-	return buf;
-}
-
-int cmd_merge_tree(int argc, const char **argv, const char *prefix)
-{
-	struct repository *r = the_repository;
-	struct tree_desc t[3];
-	void *buf1, *buf2, *buf3;
-
-	if (argc != 4)
-		usage(merge_tree_usage);
-
-	buf1 = get_tree_descriptor(r, t+0, argv[1]);
-	buf2 = get_tree_descriptor(r, t+1, argv[2]);
-	buf3 = get_tree_descriptor(r, t+2, argv[3]);
-	merge_trees(t, "");
-	free(buf1);
-	free(buf2);
-	free(buf3);
-
-	show_result();
-	return 0;
-}