Code

Merge branch 'jn/git-cmd-h-bypass-setup'
[git.git] / builtin / merge.c
index 9e4733d25f94a4185acb99cbc53255cee2654c1b..42fff387e69d9b5412e8e776aed3272b78ebe758 100644 (file)
@@ -54,8 +54,10 @@ static size_t use_strategies_nr, use_strategies_alloc;
 static const char **xopts;
 static size_t xopts_nr, xopts_alloc;
 static const char *branch;
+static int option_renormalize;
 static int verbosity;
 static int allow_rerere_auto;
+static int abort_current_merge;
 
 static struct strategy all_strategy[] = {
        { "recursive",  DEFAULT_TWOHEAD | NO_TRIVIAL },
@@ -131,6 +133,7 @@ static struct strategy *get_strategy(const char *name)
 
        ret = xcalloc(1, sizeof(struct strategy));
        ret->name = xstrdup(name);
+       ret->attr = NO_TRIVIAL;
        return ret;
 }
 
@@ -195,6 +198,8 @@ static struct option builtin_merge_options[] = {
                "message to be used for the merge commit (if any)",
                option_parse_message),
        OPT__VERBOSITY(&verbosity),
+       OPT_BOOLEAN(0, "abort", &abort_current_merge,
+               "abort the current in-progress merge"),
        OPT_END()
 };
 
@@ -232,6 +237,24 @@ static void save_state(void)
                die("not a valid object: %s", buffer.buf);
 }
 
+static void read_empty(unsigned const char *sha1, int verbose)
+{
+       int i = 0;
+       const char *args[7];
+
+       args[i++] = "read-tree";
+       if (verbose)
+               args[i++] = "-v";
+       args[i++] = "-m";
+       args[i++] = "-u";
+       args[i++] = EMPTY_TREE_SHA1_HEX;
+       args[i++] = sha1_to_hex(sha1);
+       args[i] = NULL;
+
+       if (run_command_v_opt(args, RUN_GIT_CMD))
+               die("read-tree failed");
+}
+
 static void reset_hard(unsigned const char *sha1, int verbose)
 {
        int i = 0;
@@ -401,7 +424,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
                        goto cleanup;
                }
                if (!prefixcmp(found_ref, "refs/remotes/")) {
-                       strbuf_addf(msg, "%s\t\tremote branch '%s' of .\n",
+                       strbuf_addf(msg, "%s\t\tremote-tracking branch '%s' of .\n",
                                    sha1_to_hex(branch_head), remote);
                        goto cleanup;
                }
@@ -487,7 +510,8 @@ static int git_merge_config(const char *k, const char *v, void *cb)
                buf = xstrdup(v);
                argc = split_cmdline(buf, &argv);
                if (argc < 0)
-                       die("Bad branch.%s.mergeoptions string", branch);
+                       die("Bad branch.%s.mergeoptions string: %s", branch,
+                           split_cmdline_strerror(argc));
                argv = xrealloc(argv, sizeof(*argv) * (argc + 2));
                memmove(argv + 1, argv, sizeof(*argv) * (argc + 1));
                argc++;
@@ -502,8 +526,15 @@ static int git_merge_config(const char *k, const char *v, void *cb)
                return git_config_string(&pull_twohead, k, v);
        else if (!strcmp(k, "pull.octopus"))
                return git_config_string(&pull_octopus, k, v);
+       else if (!strcmp(k, "merge.renormalize"))
+               option_renormalize = git_config_bool(k, v);
        else if (!strcmp(k, "merge.log") || !strcmp(k, "merge.summary")) {
-               shortlog_len = git_config_bool(k, v) ? DEFAULT_MERGE_LOG_LEN : 0;
+               int is_bool;
+               shortlog_len = git_config_bool_or_int(k, v, &is_bool);
+               if (!is_bool && shortlog_len < 0)
+                       return error("%s: negative length %s", k, v);
+               if (is_bool && shortlog_len)
+                       shortlog_len = DEFAULT_MERGE_LOG_LEN;
                return 0;
        }
        return git_diff_ui_config(k, v, cb);
@@ -627,18 +658,11 @@ static int try_merge_strategy(const char *strategy, struct commit_list *common,
                if (!strcmp(strategy, "subtree"))
                        o.subtree_shift = "";
 
-               for (x = 0; x < xopts_nr; x++) {
-                       if (!strcmp(xopts[x], "ours"))
-                               o.recursive_variant = MERGE_RECURSIVE_OURS;
-                       else if (!strcmp(xopts[x], "theirs"))
-                               o.recursive_variant = MERGE_RECURSIVE_THEIRS;
-                       else if (!strcmp(xopts[x], "subtree"))
-                               o.subtree_shift = "";
-                       else if (!prefixcmp(xopts[x], "subtree="))
-                               o.subtree_shift = xopts[x]+8;
-                       else
+               o.renormalize = option_renormalize;
+
+               for (x = 0; x < xopts_nr; x++)
+                       if (parse_merge_opt(&o, xopts[x]))
                                die("Unknown option for merge-recursive: -X%s", xopts[x]);
-               }
 
                o.branch1 = head_arg;
                o.branch2 = remoteheads->item->util;
@@ -707,7 +731,7 @@ int checkout_fast_forward(const unsigned char *head, const unsigned char *remote
        opts.verbose_update = 1;
        opts.merge = 1;
        opts.fn = twoway_merge;
-       opts.msgs = get_porcelain_error_msgs();
+       setup_unpack_trees_porcelain(&opts, "merge");
 
        trees[nr_trees] = parse_tree_indirect(head);
        if (!trees[nr_trees++])
@@ -819,7 +843,7 @@ static int finish_automerge(struct commit_list *common,
        return 0;
 }
 
-static int suggest_conflicts(void)
+static int suggest_conflicts(int renormalizing)
 {
        FILE *fp;
        int pos;
@@ -898,22 +922,9 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        const char *best_strategy = NULL, *wt_strategy = NULL;
        struct commit_list **remotes = &remoteheads;
 
-       if (read_cache_unmerged()) {
-               die_resolve_conflict("merge");
-       }
-       if (file_exists(git_path("MERGE_HEAD"))) {
-               /*
-                * There is no unmerged entry, don't advise 'git
-                * add/rm <file>', just 'git commit'.
-                */
-               if (advice_resolve_conflict)
-                       die("You have not concluded your merge (MERGE_HEAD exists).\n"
-                           "Please, commit your changes before you can merge.");
-               else
-                       die("You have not concluded your merge (MERGE_HEAD exists).");
-       }
+       if (argc == 2 && !strcmp(argv[1], "-h"))
+               usage_with_options(builtin_merge_usage, builtin_merge_options);
 
-       resolve_undo_clear();
        /*
         * Check if we are _not_ on a detached HEAD, i.e. if there is a
         * current branch.
@@ -932,6 +943,34 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
 
        argc = parse_options(argc, argv, prefix, builtin_merge_options,
                        builtin_merge_usage, 0);
+
+       if (abort_current_merge) {
+               int nargc = 2;
+               const char *nargv[] = {"reset", "--merge", NULL};
+
+               if (!file_exists(git_path("MERGE_HEAD")))
+                       die("There is no merge to abort (MERGE_HEAD missing).");
+
+               /* Invoke 'git reset --merge' */
+               return cmd_reset(nargc, nargv, prefix);
+       }
+
+       if (read_cache_unmerged())
+               die_resolve_conflict("merge");
+
+       if (file_exists(git_path("MERGE_HEAD"))) {
+               /*
+                * There is no unmerged entry, don't advise 'git
+                * add/rm <file>', just 'git commit'.
+                */
+               if (advice_resolve_conflict)
+                       die("You have not concluded your merge (MERGE_HEAD exists).\n"
+                           "Please, commit your changes before you can merge.");
+               else
+                       die("You have not concluded your merge (MERGE_HEAD exists).");
+       }
+       resolve_undo_clear();
+
        if (verbosity < 0)
                show_diffstat = 0;
 
@@ -982,7 +1021,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        die("%s - not something we can merge", argv[0]);
                update_ref("initial pull", "HEAD", remote_head->sha1, NULL, 0,
                                DIE_ON_ERR);
-               reset_hard(remote_head->sha1, 0);
+               read_empty(remote_head->sha1, 0);
                return 0;
        } else {
                struct strbuf merge_names = STRBUF_INIT;
@@ -1302,5 +1341,5 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        "stopped before committing as requested\n");
                return 0;
        } else
-               return suggest_conflicts();
+               return suggest_conflicts(option_renormalize);
 }