Pass a (ref_cache *) to the resolve_gitlink_*() helper functions
[gitweb.git] / builtin / merge.c
index 8d4eb4e423a2513e7b537416ab397a543b17e6b3..a1c85344b2b54f957ea69ace864ea99b7d295405 100644 (file)
@@ -26,6 +26,7 @@
 #include "merge-recursive.h"
 #include "resolve-undo.h"
 #include "remote.h"
+#include "fmt-merge-msg.h"
 
 #define DEFAULT_TWOHEAD (1<<0)
 #define DEFAULT_OCTOPUS (1<<1)
@@ -44,7 +45,7 @@ static const char * const builtin_merge_usage[] = {
        NULL
 };
 
-static int show_diffstat = 1, shortlog_len, squash;
+static int show_diffstat = 1, shortlog_len = -1, squash;
 static int option_commit = 1, allow_fast_forward = 1;
 static int fast_forward_only, option_edit;
 static int allow_trivial = 1, have_message;
@@ -316,13 +317,15 @@ static void squash_message(struct commit *commit)
        struct rev_info rev;
        struct strbuf out = STRBUF_INIT;
        struct commit_list *j;
+       const char *filename;
        int fd;
        struct pretty_print_context ctx = {0};
 
        printf(_("Squash commit -- not updating HEAD\n"));
-       fd = open(git_path("SQUASH_MSG"), O_WRONLY | O_CREAT, 0666);
+       filename = git_path("SQUASH_MSG");
+       fd = open(filename, O_WRONLY | O_CREAT, 0666);
        if (fd < 0)
-               die_errno(_("Could not write to '%s'"), git_path("SQUASH_MSG"));
+               die_errno(_("Could not write to '%s'"), filename);
 
        init_revisions(&rev, NULL);
        rev.ignore_merges = 1;
@@ -410,7 +413,7 @@ static void finish(struct commit *head_commit,
 static void merge_name(const char *remote, struct strbuf *msg)
 {
        struct commit *remote_head;
-       unsigned char branch_head[20], buf_sha[20];
+       unsigned char branch_head[20];
        struct strbuf buf = STRBUF_INIT;
        struct strbuf bname = STRBUF_INIT;
        const char *ptr;
@@ -474,7 +477,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
                strbuf_addstr(&truname, "refs/heads/");
                strbuf_addstr(&truname, remote);
                strbuf_setlen(&truname, truname.len - len);
-               if (resolve_ref(truname.buf, buf_sha, 1, NULL)) {
+               if (ref_exists(truname.buf)) {
                        strbuf_addf(msg,
                                    "%s\t\tbranch '%s'%s of .\n",
                                    sha1_to_hex(remote_head->object.sha1),
@@ -487,14 +490,16 @@ static void merge_name(const char *remote, struct strbuf *msg)
 
        if (!strcmp(remote, "FETCH_HEAD") &&
                        !access(git_path("FETCH_HEAD"), R_OK)) {
+               const char *filename;
                FILE *fp;
                struct strbuf line = STRBUF_INIT;
                char *ptr;
 
-               fp = fopen(git_path("FETCH_HEAD"), "r");
+               filename = git_path("FETCH_HEAD");
+               fp = fopen(filename, "r");
                if (!fp)
                        die_errno(_("could not open '%s' for reading"),
-                                 git_path("FETCH_HEAD"));
+                                 filename);
                strbuf_getline(&line, fp, '\n');
                fclose(fp);
                ptr = strstr(line.buf, "\tnot-for-merge\t");
@@ -533,6 +538,8 @@ static void parse_branch_merge_options(char *bmo)
 
 static int git_merge_config(const char *k, const char *v, void *cb)
 {
+       int status;
+
        if (branch && !prefixcmp(k, "branch.") &&
                !prefixcmp(k + 7, branch) &&
                !strcmp(k + 7 + strlen(branch), ".mergeoptions")) {
@@ -549,15 +556,7 @@ static int git_merge_config(const char *k, const char *v, void *cb)
                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")) {
-               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;
-       } else if (!strcmp(k, "merge.ff")) {
+       else if (!strcmp(k, "merge.ff")) {
                int boolval = git_config_maybe_bool(k, v);
                if (0 <= boolval) {
                        allow_fast_forward = boolval;
@@ -570,6 +569,9 @@ static int git_merge_config(const char *k, const char *v, void *cb)
                default_to_upstream = git_config_bool(k, v);
                return 0;
        }
+       status = fmt_merge_msg_config(k, v, cb);
+       if (status)
+               return status;
        return git_diff_ui_config(k, v, cb);
 }
 
@@ -766,7 +768,7 @@ int checkout_fast_forward(const unsigned char *head, const unsigned char *remote
        memset(&t, 0, sizeof(t));
        memset(&dir, 0, sizeof(dir));
        dir.flags |= DIR_SHOW_IGNORED;
-       dir.exclude_per_dir = ".gitignore";
+       setup_standard_excludes(&dir);
        opts.dir = &dir;
 
        opts.head_idx = 1;
@@ -842,20 +844,22 @@ static void add_strategies(const char *string, unsigned attr)
 
 static void write_merge_msg(struct strbuf *msg)
 {
-       int fd = open(git_path("MERGE_MSG"), O_WRONLY | O_CREAT, 0666);
+       const char *filename = git_path("MERGE_MSG");
+       int fd = open(filename, O_WRONLY | O_CREAT, 0666);
        if (fd < 0)
                die_errno(_("Could not open '%s' for writing"),
-                         git_path("MERGE_MSG"));
+                         filename);
        if (write_in_full(fd, msg->buf, msg->len) != msg->len)
-               die_errno(_("Could not write to '%s'"), git_path("MERGE_MSG"));
+               die_errno(_("Could not write to '%s'"), filename);
        close(fd);
 }
 
 static void read_merge_msg(struct strbuf *msg)
 {
+       const char *filename = git_path("MERGE_MSG");
        strbuf_reset(msg);
-       if (strbuf_read_file(msg, git_path("MERGE_MSG"), 0) < 0)
-               die_errno(_("Could not read from '%s'"), git_path("MERGE_MSG"));
+       if (strbuf_read_file(msg, filename, 0) < 0)
+               die_errno(_("Could not read from '%s'"), filename);
 }
 
 static void write_merge_state(void);
@@ -943,13 +947,14 @@ static int finish_automerge(struct commit *head,
 
 static int suggest_conflicts(int renormalizing)
 {
+       const char *filename;
        FILE *fp;
        int pos;
 
-       fp = fopen(git_path("MERGE_MSG"), "a");
+       filename = git_path("MERGE_MSG");
+       fp = fopen(filename, "a");
        if (!fp)
-               die_errno(_("Could not open '%s' for writing"),
-                         git_path("MERGE_MSG"));
+               die_errno(_("Could not open '%s' for writing"), filename);
        fprintf(fp, "\nConflicts:\n");
        for (pos = 0; pos < active_nr; pos++) {
                struct cache_entry *ce = active_cache[pos];
@@ -1041,31 +1046,40 @@ static int setup_with_upstream(const char ***argv)
 
 static void write_merge_state(void)
 {
+       const char *filename;
        int fd;
        struct commit_list *j;
        struct strbuf buf = STRBUF_INIT;
 
-       for (j = remoteheads; j; j = j->next)
-               strbuf_addf(&buf, "%s\n",
-                       sha1_to_hex(j->item->object.sha1));
-       fd = open(git_path("MERGE_HEAD"), O_WRONLY | O_CREAT, 0666);
+       for (j = remoteheads; j; j = j->next) {
+               unsigned const char *sha1;
+               struct commit *c = j->item;
+               if (c->util && merge_remote_util(c)->obj) {
+                       sha1 = merge_remote_util(c)->obj->sha1;
+               } else {
+                       sha1 = c->object.sha1;
+               }
+               strbuf_addf(&buf, "%s\n", sha1_to_hex(sha1));
+       }
+       filename = git_path("MERGE_HEAD");
+       fd = open(filename, O_WRONLY | O_CREAT, 0666);
        if (fd < 0)
-               die_errno(_("Could not open '%s' for writing"),
-                         git_path("MERGE_HEAD"));
+               die_errno(_("Could not open '%s' for writing"), filename);
        if (write_in_full(fd, buf.buf, buf.len) != buf.len)
-               die_errno(_("Could not write to '%s'"), git_path("MERGE_HEAD"));
+               die_errno(_("Could not write to '%s'"), filename);
        close(fd);
        strbuf_addch(&merge_msg, '\n');
        write_merge_msg(&merge_msg);
-       fd = open(git_path("MERGE_MODE"), O_WRONLY | O_CREAT | O_TRUNC, 0666);
+
+       filename = git_path("MERGE_MODE");
+       fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
        if (fd < 0)
-               die_errno(_("Could not open '%s' for writing"),
-                         git_path("MERGE_MODE"));
+               die_errno(_("Could not open '%s' for writing"), filename);
        strbuf_reset(&buf);
        if (!allow_fast_forward)
                strbuf_addf(&buf, "no-ff");
        if (write_in_full(fd, buf.buf, buf.len) != buf.len)
-               die_errno(_("Could not write to '%s'"), git_path("MERGE_MODE"));
+               die_errno(_("Could not write to '%s'"), filename);
        close(fd);
 }
 
@@ -1077,7 +1091,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        struct commit *head_commit;
        struct strbuf buf = STRBUF_INIT;
        const char *head_arg;
-       int flag, i;
+       int flag, i, ret = 0;
        int best_cnt = -1, merge_was_ok = 0, automerge_was_ok = 0;
        struct commit_list *common = NULL;
        const char *best_strategy = NULL, *wt_strategy = NULL;
@@ -1091,8 +1105,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
         * current branch.
         */
        branch = resolve_ref("HEAD", head_sha1, 0, &flag);
-       if (branch && !prefixcmp(branch, "refs/heads/"))
-               branch += 11;
+       if (branch) {
+               if (!prefixcmp(branch, "refs/heads/"))
+                       branch += 11;
+               branch = xstrdup(branch);
+       }
        if (!branch || is_null_sha1(head_sha1))
                head_commit = NULL;
        else
@@ -1104,6 +1121,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                parse_branch_merge_options(branch_mergeoptions);
        argc = parse_options(argc, argv, prefix, builtin_merge_options,
                        builtin_merge_usage, 0);
+       if (shortlog_len < 0)
+               shortlog_len = (merge_log_config > 0) ? merge_log_config : 0;
 
        if (verbosity < 0 && show_progress == -1)
                show_progress = 0;
@@ -1116,7 +1135,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        die(_("There is no merge to abort (MERGE_HEAD missing)."));
 
                /* Invoke 'git reset --merge' */
-               return cmd_reset(nargc, nargv, prefix);
+               ret = cmd_reset(nargc, nargv, prefix);
+               goto done;
        }
 
        if (read_cache_unmerged())
@@ -1155,9 +1175,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                die(_("You cannot combine --no-ff with --ff-only."));
 
        if (!abort_current_merge) {
-               if (!argc && default_to_upstream)
-                       argc = setup_with_upstream(&argv);
-               else if (argc == 1 && !strcmp(argv[0], "-"))
+               if (!argc) {
+                       if (default_to_upstream)
+                               argc = setup_with_upstream(&argv);
+                       else
+                               die(_("No commit specified and merge.defaultToUpstream not set."));
+               } else if (argc == 1 && !strcmp(argv[0], "-"))
                        argv[0] = "@{-1}";
        }
        if (!argc)
@@ -1200,7 +1223,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                read_empty(remote_head->object.sha1, 0);
                update_ref("initial pull", "HEAD", remote_head->object.sha1,
                           NULL, 0, DIE_ON_ERR);
-               return 0;
+               goto done;
        } else {
                struct strbuf merge_names = STRBUF_INIT;
 
@@ -1246,6 +1269,12 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                            sha1_to_hex(commit->object.sha1));
                setenv(buf.buf, argv[i], 1);
                strbuf_reset(&buf);
+               if (merge_remote_util(commit) &&
+                   merge_remote_util(commit)->obj &&
+                   merge_remote_util(commit)->obj->type == OBJ_TAG) {
+                       option_edit = 1;
+                       allow_fast_forward = 0;
+               }
        }
 
        if (!use_strategies) {
@@ -1283,7 +1312,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                 * but first the most common case of merging one remote.
                 */
                finish_up_to_date("Already up-to-date.");
-               return 0;
+               goto done;
        } else if (allow_fast_forward && !remoteheads->next &&
                        !common->next &&
                        !hashcmp(common->item->object.sha1, head_commit->object.sha1)) {
@@ -1304,16 +1333,20 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        strbuf_addstr(&msg,
                                " (no commit created; -m option ignored)");
                commit = remoteheads->item;
-               if (!commit)
-                       return 1;
+               if (!commit) {
+                       ret = 1;
+                       goto done;
+               }
 
                if (checkout_fast_forward(head_commit->object.sha1,
-                                         commit->object.sha1))
-                       return 1;
+                                         commit->object.sha1)) {
+                       ret = 1;
+                       goto done;
+               }
 
                finish(head_commit, commit->object.sha1, msg.buf);
                drop_save();
-               return 0;
+               goto done;
        } else if (!remoteheads->next && common->next)
                ;
                /*
@@ -1331,8 +1364,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                        git_committer_info(IDENT_ERROR_ON_NO_NAME);
                        printf(_("Trying really trivial in-index merge...\n"));
                        if (!read_tree_trivial(common->item->object.sha1,
-                                       head_commit->object.sha1, remoteheads->item->object.sha1))
-                               return merge_trivial(head_commit);
+                                              head_commit->object.sha1,
+                                              remoteheads->item->object.sha1)) {
+                               ret = merge_trivial(head_commit);
+                               goto done;
+                       }
                        printf(_("Nope.\n"));
                }
        } else {
@@ -1360,7 +1396,7 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                }
                if (up_to_date) {
                        finish_up_to_date("Already up-to-date. Yeeah!");
-                       return 0;
+                       goto done;
                }
        }
 
@@ -1442,9 +1478,11 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
         * If we have a resulting tree, that means the strategy module
         * auto resolved the merge cleanly.
         */
-       if (automerge_was_ok)
-               return finish_automerge(head_commit, common, result_tree,
-                                       wt_strategy);
+       if (automerge_was_ok) {
+               ret = finish_automerge(head_commit, common, result_tree,
+                                      wt_strategy);
+               goto done;
+       }
 
        /*
         * Pick the result from the best strategy and have the user fix
@@ -1458,7 +1496,8 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
                else
                        fprintf(stderr, _("Merge with strategy %s failed.\n"),
                                use_strategies[0]->name);
-               return 2;
+               ret = 2;
+               goto done;
        } else if (best_strategy == wt_strategy)
                ; /* We already have its result in the working tree. */
        else {
@@ -1474,10 +1513,13 @@ int cmd_merge(int argc, const char **argv, const char *prefix)
        else
                write_merge_state();
 
-       if (merge_was_ok) {
+       if (merge_was_ok)
                fprintf(stderr, _("Automatic merge went well; "
                        "stopped before committing as requested\n"));
-               return 0;
-       } else
-               return suggest_conflicts(option_renormalize);
+       else
+               ret = suggest_conflicts(option_renormalize);
+
+done:
+       free((char *)branch);
+       return ret;
 }