push: support pushing HEAD to real branch name
[gitweb.git] / merge-recursive.c
index 403a4c8bca3062c8fa586e369b3fd1308c919641..9a1e2f269dc5eff3b7544507a1e483948cc1254d 100644 (file)
@@ -85,63 +85,59 @@ struct stage_data
        unsigned processed:1;
 };
 
-struct output_buffer
-{
-       struct output_buffer *next;
-       char *str;
-};
-
 static struct path_list current_file_set = {NULL, 0, 0, 1};
 static struct path_list current_directory_set = {NULL, 0, 0, 1};
 
 static int call_depth = 0;
 static int verbosity = 2;
+static int rename_limit = -1;
 static int buffer_output = 1;
-static struct output_buffer *output_list, *output_end;
+static struct strbuf obuf = STRBUF_INIT;
 
-static int show (int v)
+static int show(int v)
 {
        return (!call_depth && verbosity >= v) || verbosity >= 5;
 }
 
-static void output(int v, const char *fmt, ...)
+static void flush_output(void)
 {
-       va_list args;
-       va_start(args, fmt);
-       if (buffer_output && show(v)) {
-               struct output_buffer *b = xmalloc(sizeof(*b));
-               nfvasprintf(&b->str, fmt, args);
-               b->next = NULL;
-               if (output_end)
-                       output_end->next = b;
-               else
-                       output_list = b;
-               output_end = b;
-       } else if (show(v)) {
-               int i;
-               for (i = call_depth; i--;)
-                       fputs("  ", stdout);
-               vfprintf(stdout, fmt, args);
-               fputc('\n', stdout);
+       if (obuf.len) {
+               fputs(obuf.buf, stdout);
+               strbuf_reset(&obuf);
        }
-       va_end(args);
 }
 
-static void flush_output()
+static void output(int v, const char *fmt, ...)
 {
-       struct output_buffer *b, *n;
-       for (b = output_list; b; b = n) {
-               int i;
-               for (i = call_depth; i--;)
-                       fputs("  ", stdout);
-               fputs(b->str, stdout);
-               fputc('\n', stdout);
-               n = b->next;
-               free(b->str);
-               free(b);
+       int len;
+       va_list ap;
+
+       if (!show(v))
+               return;
+
+       strbuf_grow(&obuf, call_depth * 2 + 2);
+       memset(obuf.buf + obuf.len, ' ', call_depth * 2);
+       strbuf_setlen(&obuf, obuf.len + call_depth * 2);
+
+       va_start(ap, fmt);
+       len = vsnprintf(obuf.buf + obuf.len, strbuf_avail(&obuf), fmt, ap);
+       va_end(ap);
+
+       if (len < 0)
+               len = 0;
+       if (len >= strbuf_avail(&obuf)) {
+               strbuf_grow(&obuf, len + 2);
+               va_start(ap, fmt);
+               len = vsnprintf(obuf.buf + obuf.len, strbuf_avail(&obuf), fmt, ap);
+               va_end(ap);
+               if (len >= strbuf_avail(&obuf)) {
+                       die("this should not happen, your snprintf is broken");
+               }
        }
-       output_list = NULL;
-       output_end = NULL;
+       strbuf_setlen(&obuf, obuf.len + len);
+       strbuf_add(&obuf, "\n", 1);
+       if (!buffer_output)
+               flush_output();
 }
 
 static void output_commit_title(struct commit *commit)
@@ -171,30 +167,6 @@ static void output_commit_title(struct commit *commit)
        }
 }
 
-static struct cache_entry *make_cache_entry(unsigned int mode,
-               const unsigned char *sha1, const char *path, int stage, int refresh)
-{
-       int size, len;
-       struct cache_entry *ce;
-
-       if (!verify_path(path))
-               return NULL;
-
-       len = strlen(path);
-       size = cache_entry_size(len);
-       ce = xcalloc(1, size);
-
-       hashcpy(ce->sha1, sha1);
-       memcpy(ce->name, path, len);
-       ce->ce_flags = create_ce_flags(len, stage);
-       ce->ce_mode = create_ce_mode(mode);
-
-       if (refresh)
-               return refresh_cache_entry(ce, 0);
-
-       return ce;
-}
-
 static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
                const char *path, int stage, int refresh, int options)
 {
@@ -216,13 +188,19 @@ static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
  */
 static int index_only = 0;
 
+static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree)
+{
+       parse_tree(tree);
+       init_tree_desc(desc, tree->buffer, tree->size);
+}
+
 static int git_merge_trees(int index_only,
                           struct tree *common,
                           struct tree *head,
                           struct tree *merge)
 {
        int rc;
-       struct object_list *trees = NULL;
+       struct tree_desc t[3];
        struct unpack_trees_options opts;
 
        memset(&opts, 0, sizeof(opts));
@@ -234,11 +212,11 @@ static int git_merge_trees(int index_only,
        opts.head_idx = 2;
        opts.fn = threeway_merge;
 
-       object_list_append(&common->object, &trees);
-       object_list_append(&head->object, &trees);
-       object_list_append(&merge->object, &trees);
+       init_tree_desc_from_tree(t+0, common);
+       init_tree_desc_from_tree(t+1, head);
+       init_tree_desc_from_tree(t+2, merge);
 
-       rc = unpack_trees(trees, &opts);
+       rc = unpack_trees(3, t, &opts);
        cache_tree_free(&active_cache_tree);
        return rc;
 }
@@ -388,8 +366,9 @@ static struct path_list *get_renames(struct tree *tree,
 
        renames = xcalloc(1, sizeof(struct path_list));
        diff_setup(&opts);
-       opts.recursive = 1;
+       DIFF_OPT_SET(&opts, RECURSIVE);
        opts.detect_rename = DIFF_DETECT_RENAME;
+       opts.rename_limit = rename_limit;
        opts.output_format = DIFF_FORMAT_NO_OUTPUT;
        if (diff_setup_done(&opts) < 0)
                die("diff setup failed");
@@ -450,19 +429,15 @@ static int update_stages(const char *path, struct diff_filespec *o,
 
 static int remove_path(const char *name)
 {
-       int ret, len;
+       int ret;
        char *slash, *dirs;
 
        ret = unlink(name);
        if (ret)
                return ret;
-       len = strlen(name);
-       dirs = xmalloc(len+1);
-       memcpy(dirs, name, len);
-       dirs[len] = '\0';
+       dirs = xstrdup(name);
        while ((slash = strrchr(name, '/'))) {
                *slash = '\0';
-               len = slash - name;
                if (rmdir(name) != 0)
                        break;
        }
@@ -596,9 +571,7 @@ static void update_file_flags(const unsigned char *sha,
                        flush_buffer(fd, buf, size);
                        close(fd);
                } else if (S_ISLNK(mode)) {
-                       char *lnk = xmalloc(size + 1);
-                       memcpy(lnk, buf, size);
-                       lnk[size] = '\0';
+                       char *lnk = xmemdupz(buf, size);
                        mkdir_p(path, 0777);
                        unlink(path);
                        symlink(lnk, path);
@@ -671,6 +644,26 @@ struct ll_merge_driver {
 /*
  * Built-in low-levels
  */
+static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
+                          const char *path_unused,
+                          mmfile_t *orig,
+                          mmfile_t *src1, const char *name1,
+                          mmfile_t *src2, const char *name2,
+                          mmbuffer_t *result)
+{
+       /*
+        * The tentative merge result is "ours" for the final round,
+        * or common ancestor for an internal merge.  Still return
+        * "conflicted merge" status.
+        */
+       mmfile_t *stolen = index_only ? orig : src1;
+
+       result->ptr = stolen->ptr;
+       result->size = stolen->size;
+       stolen->ptr = NULL;
+       return 1;
+}
+
 static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
                        const char *path_unused,
                        mmfile_t *orig,
@@ -680,6 +673,17 @@ static int ll_xdl_merge(const struct ll_merge_driver *drv_unused,
 {
        xpparam_t xpp;
 
+       if (buffer_is_binary(orig->ptr, orig->size) ||
+           buffer_is_binary(src1->ptr, src1->size) ||
+           buffer_is_binary(src2->ptr, src2->size)) {
+               warning("Cannot merge binary files: %s vs. %s\n",
+                       name1, name2);
+               return ll_binary_merge(drv_unused, path_unused,
+                                      orig, src1, name1,
+                                      src2, name2,
+                                      result);
+       }
+
        memset(&xpp, 0, sizeof(xpp));
        return xdl_merge(orig,
                         src1, name1,
@@ -731,26 +735,6 @@ static int ll_union_merge(const struct ll_merge_driver *drv_unused,
        return 0;
 }
 
-static int ll_binary_merge(const struct ll_merge_driver *drv_unused,
-                          const char *path_unused,
-                          mmfile_t *orig,
-                          mmfile_t *src1, const char *name1,
-                          mmfile_t *src2, const char *name2,
-                          mmbuffer_t *result)
-{
-       /*
-        * The tentative merge result is "ours" for the final round,
-        * or common ancestor for an internal merge.  Still return
-        * "conflicted merge" status.
-        */
-       mmfile_t *stolen = index_only ? orig : src1;
-
-       result->ptr = stolen->ptr;
-       result->size = stolen->size;
-       stolen->ptr = NULL;
-       return 1;
-}
-
 #define LL_BINARY_MERGE 0
 #define LL_TEXT_MERGE 1
 #define LL_UNION_MERGE 2
@@ -765,9 +749,7 @@ static void create_temp(mmfile_t *src, char *path)
        int fd;
 
        strcpy(path, ".merge_file_XXXXXX");
-       fd = mkstemp(path);
-       if (fd < 0)
-               die("unable to create temp-file");
+       fd = xmkstemp(path);
        if (write_in_full(fd, src->ptr, src->size) != src->size)
                die("unable to write temp-file");
        close(fd);
@@ -881,14 +863,9 @@ static int read_merge_config(const char *var, const char *value)
                if (!strncmp(fn->name, name, namelen) && !fn->name[namelen])
                        break;
        if (!fn) {
-               char *namebuf;
                fn = xcalloc(1, sizeof(struct ll_merge_driver));
-               namebuf = xmalloc(namelen + 1);
-               memcpy(namebuf, name, namelen);
-               namebuf[namelen] = 0;
-               fn->name = namebuf;
+               fn->name = xmemdupz(name, namelen);
                fn->fn = ll_ext_merge;
-               fn->next = NULL;
                *ll_user_merge_tail = fn;
                ll_user_merge_tail = &(fn->next);
        }
@@ -1342,20 +1319,31 @@ static int process_renames(struct path_list *a_renames,
                                mfi = merge_file(o, a, b,
                                                a_branch, b_branch);
 
-                               if (mfi.merge || !mfi.clean)
-                                       output(1, "Renamed %s => %s", ren1_src, ren1_dst);
-                               if (mfi.merge)
-                                       output(2, "Auto-merged %s", ren1_dst);
-                               if (!mfi.clean) {
-                                       output(1, "CONFLICT (rename/modify): Merge conflict in %s",
-                                              ren1_dst);
-                                       clean_merge = 0;
-
-                                       if (!index_only)
-                                               update_stages(ren1_dst,
-                                                               o, a, b, 1);
+                               if (mfi.clean &&
+                                   sha_eq(mfi.sha, ren1->pair->two->sha1) &&
+                                   mfi.mode == ren1->pair->two->mode)
+                                       /*
+                                        * This messaged is part of
+                                        * t6022 test. If you change
+                                        * it update the test too.
+                                        */
+                                       output(3, "Skipped %s (merged same as existing)", ren1_dst);
+                               else {
+                                       if (mfi.merge || !mfi.clean)
+                                               output(1, "Renamed %s => %s", ren1_src, ren1_dst);
+                                       if (mfi.merge)
+                                               output(2, "Auto-merged %s", ren1_dst);
+                                       if (!mfi.clean) {
+                                               output(1, "CONFLICT (rename/modify): Merge conflict in %s",
+                                                      ren1_dst);
+                                               clean_merge = 0;
+
+                                               if (!index_only)
+                                                       update_stages(ren1_dst,
+                                                                     o, a, b, 1);
+                                       }
+                                       update_file(mfi.clean, mfi.sha, mfi.mode, ren1_dst);
                                }
-                               update_file(mfi.clean, mfi.sha, mfi.mode, ren1_dst);
                        }
                }
        }
@@ -1584,7 +1572,7 @@ static int merge(struct commit *h1,
 {
        struct commit_list *iter;
        struct commit *merged_common_ancestors;
-       struct tree *mrtree;
+       struct tree *mrtree = mrtree;
        int clean;
 
        if (show(4)) {
@@ -1691,6 +1679,10 @@ static int merge_config(const char *var, const char *value)
                verbosity = git_config_int(var, value);
                return 0;
        }
+       if (!strcasecmp(var, "diff.renamelimit")) {
+               rename_limit = git_config_int(var, value);
+               return 0;
+       }
        return git_default_config(var, value);
 }