color: delay auto-color decision until point of use

diff --git a/builtin/merge.c b/builtin/merge.c
index 0f03dff1160f68de6f406f038c1b5c2bbd6529c8..7209edf76af7f43e1e1de149e736c50d6c84c114 100644 (file)
--- a/builtin/merge.c
+++ b/builtin/merge.c
@@ -339,13 +339,14 @@ static void squash_message(void)
 
        ctx.abbrev = rev.abbrev;
        ctx.date_mode = rev.date_mode;
+       ctx.fmt = rev.commit_format;
 
        strbuf_addstr(&out, "Squashed commit of the following:\n");
        while ((commit = get_revision(&rev)) != NULL) {
                strbuf_addch(&out, '\n');
                strbuf_addf(&out, "commit %s\n",
                        sha1_to_hex(commit->object.sha1));
-               pretty_print_commit(rev.commit_format, commit, &out, &ctx);
+               pretty_print_commit(&ctx, commit, &out);
        }
        if (write(fd, out.buf, out.len) < 0)
                die_errno(_("Writing SQUASH_MSG"));
@@ -389,8 +390,6 @@ static void finish(const unsigned char *new_head, const char *msg)
                opts.output_format |=
                        DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
                opts.detect_rename = DIFF_DETECT_RENAME;
-               if (diff_use_color_default > 0)
-                       DIFF_OPT_SET(&opts, COLOR_DIFF);
                if (diff_setup_done(&opts) < 0)
                        die(_("diff_setup_done failed"));
                diff_tree_sha1(head, new_head, "", &opts);
@@ -550,6 +549,15 @@ static int git_merge_config(const char *k, const char *v, void *cb)
                if (is_bool && shortlog_len)
                        shortlog_len = DEFAULT_MERGE_LOG_LEN;
                return 0;
+       } else if (!strcmp(k, "merge.ff")) {
+               int boolval = git_config_maybe_bool(k, v);
+               if (0 <= boolval) {
+                       allow_fast_forward = boolval;
+               } else if (v && !strcmp(v, "only")) {
+                       allow_fast_forward = 1;
+                       fast_forward_only = 1;
+               } /* do not barf on values from future versions of git */
+               return 0;
        } else if (!strcmp(k, "merge.defaulttoupstream")) {
                default_to_upstream = git_config_bool(k, v);
                return 0;
@@ -599,6 +607,14 @@ static void write_tree_trivial(unsigned char *sha1)
                die(_("git write-tree failed to write a tree"));
 }
 
+static const char *merge_argument(struct commit *commit)
+{
+       if (commit)
+               return sha1_to_hex(commit->object.sha1);
+       else
+               return EMPTY_TREE_SHA1_HEX;
+}
+
 int try_merge_command(const char *strategy, size_t xopts_nr,
                      const char **xopts, struct commit_list *common,
                      const char *head_arg, struct commit_list *remotes)
@@ -619,11 +635,11 @@ int try_merge_command(const char *strategy, size_t xopts_nr,
                args[i++] = s;
        }
        for (j = common; j; j = j->next)
-               args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
+               args[i++] = xstrdup(merge_argument(j->item));
        args[i++] = "--";
        args[i++] = head_arg;
        for (j = remotes; j; j = j->next)
-               args[i++] = xstrdup(sha1_to_hex(j->item->object.sha1));
+               args[i++] = xstrdup(merge_argument(j->item));
        args[i] = NULL;
        ret = run_command_v_opt(args, RUN_GIT_CMD);
        strbuf_release(&buf);
@@ -831,7 +847,7 @@ static void read_merge_msg(void)
 {
        strbuf_reset(&merge_msg);
        if (strbuf_read_file(&merge_msg, git_path("MERGE_MSG"), 0) < 0)
-               die_errno("Could not read from '%s'", git_path("MERGE_MSG"));
+               die_errno(_("Could not read from '%s'"), git_path("MERGE_MSG"));
 }
 
 static void run_prepare_commit_msg(void)
@@ -971,16 +987,16 @@ static int setup_with_upstream(const char ***argv)
        const char **args;
 
        if (!branch)
-               die("No current branch.");
+               die(_("No current branch."));
        if (!branch->remote)
-               die("No remote for the current branch.");
+               die(_("No remote for the current branch."));
        if (!branch->merge_nr)
-               die("No default upstream defined for the current branch.");
+               die(_("No default upstream defined for the current branch."));
 
        args = xcalloc(branch->merge_nr + 1, sizeof(char *));
        for (i = 0; i < branch->merge_nr; i++) {
                if (!branch->merge[i]->dst)
-                       die("No remote tracking branch for %s from %s",
+                       die(_("No remote tracking branch for %s from %s"),
                            branch->merge[i]->src, branch->remote_name);
                args[i] = branch->merge[i]->dst;
        }
@@ -1054,10 +1070,10 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        }
        if (file_exists(git_path("CHERRY_PICK_HEAD"))) {
                if (advice_resolve_conflict)
-                       die("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists).\n"
-                           "Please, commit your changes before you can merge.");
+                       die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists).\n"
+                           "Please, commit your changes before you can merge."));
                else
-                       die("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists).");
+                       die(_("You have not concluded your cherry-pick (CHERRY_PICK_HEAD exists)."));
        }
        resolve_undo_clear();
 
@@ -1073,9 +1089,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        if (!allow_fast_forward && fast_forward_only)
                die(_("You cannot combine --no-ff with --ff-only."));
 
-       if (!argc && !abort_current_merge && default_to_upstream)
-               argc = setup_with_upstream(&argv);
-
+       if (!abort_current_merge) {
+               if (!argc && default_to_upstream)
+                       argc = setup_with_upstream(&argv);
+               else if (argc == 1 && !strcmp(argv[0], "-"))
+                       argv[0] = "@{-1}";
+       }
        if (!argc)
                usage_with_options(builtin_merge_usage,
                        builtin_merge_options);