Remove "merge-tree.c"

It's there in the history if somebody wants to resurrect it, but it
seems to have been successfully superceded by the new and improved
index-merge thing, where we do all merging entirely in the index.

diff --git a/Makefile b/Makefile
index b157273..92de1cb 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ CC=gcc
 
 PROG=   update-cache show-diff init-db write-tree read-tree commit-tree \
        cat-file fsck-cache checkout-cache diff-tree rev-tree show-files \
-       check-files ls-tree merge-tree
+       check-files ls-tree
 
 all: $(PROG)
 
@@ -64,9 +64,6 @@ check-files: check-files.o read-cache.o
 ls-tree: ls-tree.o read-cache.o
        $(CC) $(CFLAGS) -o ls-tree ls-tree.o read-cache.o $(LIBS)
 
-merge-tree: merge-tree.o read-cache.o
-       $(CC) $(CFLAGS) -o merge-tree merge-tree.o read-cache.o $(LIBS)
-
 read-cache.o: cache.h
 show-diff.o: cache.h
 

diff --git a/merge-tree.c b/merge-tree.c
deleted file mode 100644 (file)
index ef9a54d..0000000
--- a/merge-tree.c
+++ /dev/null
@@ -1,145 +0,0 @@
-#include "cache.h"
-
-static int line_termination = '\n';
-
-struct tree_entry {
-       unsigned mode;
-       unsigned char *sha1;
-       char *path;
-       struct tree_entry *next;
-};
-
-static struct tree_entry *read_tree(unsigned char *sha1)
-{
-       char type[20];
-       unsigned long size;
-       void *buf = read_sha1_file(sha1, type, &size);
-       struct tree_entry *ret = NULL, **tp = &ret;
-
-       if (!buf || strcmp(type, "tree"))
-               die("unable to read 'tree' object %s", sha1_to_hex(sha1));
-       while (size) {
-               int len = strlen(buf)+1;
-               struct tree_entry * entry = malloc(sizeof(struct tree_entry));
-               if (size < len + 20 || sscanf(buf, "%o", &entry->mode) != 1)
-                       die("corrupt 'tree' object %s", sha1_to_hex(sha1));
-               entry->path = strchr(buf, ' ')+1;
-               entry->sha1 = buf + len;
-               entry->next = NULL;
-               *tp = entry;
-               tp = &entry->next;
-               len += 20;
-               buf += len;
-               size -= len;
-       }
-       return ret;
-}
-
-static void show(const struct tree_entry *a, const char *path)
-{
-       printf("select %o %s %s%c", a->mode, sha1_to_hex(a->sha1), path,
-              line_termination);
-}
-
-static void merge(const struct tree_entry *a, const struct tree_entry *b, const struct tree_entry *c, const char *path)
-{
-       char hex_a[60], hex_b[60], hex_c[60];
-       strcpy(hex_a, sha1_to_hex(a->sha1));
-       strcpy(hex_b, sha1_to_hex(b->sha1));
-       strcpy(hex_c, sha1_to_hex(c->sha1));
-       printf("merge %o->%o,%o %s->%s,%s %s%c",
-               a->mode, b->mode, c->mode,
-               hex_a, hex_b, hex_c, path, line_termination);
-}
-
-static int same(const struct tree_entry *a, const struct tree_entry *b)
-{
-       return a->mode == b->mode && !memcmp(a->sha1, b->sha1, 20);
-}
-
-static void merge_entry(const struct tree_entry *src, const struct tree_entry *dst1, const struct tree_entry *dst2)
-{
-       static unsigned char nullsha1[20];
-       static const struct tree_entry none = { 0, nullsha1, "", NULL };
-       const char *path = NULL;
-       const struct tree_entry *a, *b, *c;
-
-       a = &none;
-       b = &none;
-       c = &none;
-       if (src) { a = src; path = src->path; }
-       if (dst1) { b = dst1; path = dst1->path; }
-       if (dst2) { c = dst2; path = dst2->path; }
-       if (same(b, c)) {
-               show(b, path);
-               return;
-       }
-       if (same(a, b)) {
-               show(c, path);
-               return;
-       }
-       if (same(a, c)) {
-               show(b, path);
-               return;
-       }
-       merge(a, b, c, path);
-}
-
-/* For two entries, select the smaller one, clear the bigger one */
-static void smaller(struct tree_entry **ap, struct tree_entry **bp)
-{
-       struct tree_entry *a = *ap, *b = *bp;
-       if (a && b) {
-               int cmp = cache_name_compare(a->path, strlen(a->path), b->path, strlen(b->path));
-               if (cmp) {
-                       if (cmp < 0)
-                               *bp = NULL;
-                       else
-                               *ap = NULL;
-               }
-       }
-}
-
-static void merge_tree(struct tree_entry *src, struct tree_entry *dst1, struct tree_entry *dst2)
-{
-       while (src || dst1 || dst2) {
-               struct tree_entry *a, *b, *c;
-               a = src;
-               b = dst1;
-               c = dst2;
-               smaller(&a,&b);
-               smaller(&a,&c);
-               smaller(&b,&c);
-               if (a) src = a->next;
-               if (b) dst1 = b->next;
-               if (c) dst2 = c->next;
-               merge_entry(a,b,c);
-       }
-}
-
-static const char *merge_tree_usage =
-    "merge-tree [-z] <src> <dst1> <dst2>";
-
-int main(int argc, char **argv)
-{
-       unsigned char src[20], dst1[20], dst2[20];
-
-       while ((1 < argc) && argv[1][0] == '-') {
-               switch (argv[1][1]) {
-               case 'z':
-                       line_termination = 0;
-                       break;
-               default:
-                       usage(merge_tree_usage);
-               }
-               argc--; argv++;
-       }
-
-       if (argc != 4 ||
-           get_sha1_hex(argv[1], src) ||
-           get_sha1_hex(argv[2], dst1) ||
-           get_sha1_hex(argv[3], dst2))
-               usage(merge_tree_usage);
-       merge_tree(read_tree(src), read_tree(dst1), read_tree(dst2));
-       return 0;
-}