revert: Introduce struct to keep command-line options
[gitweb.git] / builtin / revert.c
index d6c9f1dadb8f002d0c859ce6698a6fba8874904a..50f72debe03b75c9d73617f18f146a1d9c374ebd 100644 (file)
@@ -35,76 +35,94 @@ static const char * const cherry_pick_usage[] = {
        NULL
 };
 
-static int edit, record_origin, no_commit, mainline, signoff, allow_ff;
-static enum { REVERT, CHERRY_PICK } action;
-static int commit_argc;
-static const char **commit_argv;
-static int allow_rerere_auto;
-
-static const char *me;
-
-/* Merge strategy. */
-static const char *strategy;
-static const char **xopts;
-static size_t xopts_nr, xopts_alloc;
+enum replay_action { REVERT, CHERRY_PICK };
+
+struct replay_opts {
+       enum replay_action action;
+
+       /* Boolean options */
+       int edit;
+       int record_origin;
+       int no_commit;
+       int signoff;
+       int allow_ff;
+       int allow_rerere_auto;
+
+       int mainline;
+       int commit_argc;
+       const char **commit_argv;
+
+       /* Merge strategy */
+       const char *strategy;
+       const char **xopts;
+       size_t xopts_nr, xopts_alloc;
+};
 
 #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
 
+static const char *action_name(const struct replay_opts *opts)
+{
+       return opts->action == REVERT ? "revert" : "cherry-pick";
+}
+
 static char *get_encoding(const char *message);
 
-static const char * const *revert_or_cherry_pick_usage(void)
+static const char * const *revert_or_cherry_pick_usage(struct replay_opts *opts)
 {
-       return action == REVERT ? revert_usage : cherry_pick_usage;
+       return opts->action == REVERT ? revert_usage : cherry_pick_usage;
 }
 
 static int option_parse_x(const struct option *opt,
                          const char *arg, int unset)
 {
+       struct replay_opts **opts_ptr = opt->value;
+       struct replay_opts *opts = *opts_ptr;
+
        if (unset)
                return 0;
 
-       ALLOC_GROW(xopts, xopts_nr + 1, xopts_alloc);
-       xopts[xopts_nr++] = xstrdup(arg);
+       ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc);
+       opts->xopts[opts->xopts_nr++] = xstrdup(arg);
        return 0;
 }
 
-static void parse_args(int argc, const char **argv)
+static void parse_args(int argc, const char **argv, struct replay_opts *opts)
 {
-       const char * const * usage_str = revert_or_cherry_pick_usage();
+       const char * const * usage_str = revert_or_cherry_pick_usage(opts);
        int noop;
        struct option options[] = {
-               OPT_BOOLEAN('n', "no-commit", &no_commit, "don't automatically commit"),
-               OPT_BOOLEAN('e', "edit", &edit, "edit the commit message"),
+               OPT_BOOLEAN('n', "no-commit", &opts->no_commit, "don't automatically commit"),
+               OPT_BOOLEAN('e', "edit", &opts->edit, "edit the commit message"),
                { OPTION_BOOLEAN, 'r', NULL, &noop, NULL, "no-op (backward compatibility)",
                  PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 0 },
-               OPT_BOOLEAN('s', "signoff", &signoff, "add Signed-off-by:"),
-               OPT_INTEGER('m', "mainline", &mainline, "parent number"),
-               OPT_RERERE_AUTOUPDATE(&allow_rerere_auto),
-               OPT_STRING(0, "strategy", &strategy, "strategy", "merge strategy"),
-               OPT_CALLBACK('X', "strategy-option", &xopts, "option",
+               OPT_BOOLEAN('s', "signoff", &opts->signoff, "add Signed-off-by:"),
+               OPT_INTEGER('m', "mainline", &opts->mainline, "parent number"),
+               OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
+               OPT_STRING(0, "strategy", &opts->strategy, "strategy", "merge strategy"),
+               OPT_CALLBACK('X', "strategy-option", &opts, "option",
                        "option for merge strategy", option_parse_x),
                OPT_END(),
                OPT_END(),
                OPT_END(),
        };
 
-       if (action == CHERRY_PICK) {
+       if (opts->action == CHERRY_PICK) {
                struct option cp_extra[] = {
-                       OPT_BOOLEAN('x', NULL, &record_origin, "append commit name"),
-                       OPT_BOOLEAN(0, "ff", &allow_ff, "allow fast-forward"),
+                       OPT_BOOLEAN('x', NULL, &opts->record_origin, "append commit name"),
+                       OPT_BOOLEAN(0, "ff", &opts->allow_ff, "allow fast-forward"),
                        OPT_END(),
                };
                if (parse_options_concat(options, ARRAY_SIZE(options), cp_extra))
                        die(_("program error"));
        }
 
-       commit_argc = parse_options(argc, argv, NULL, options, usage_str,
-                                   PARSE_OPT_KEEP_ARGV0 |
-                                   PARSE_OPT_KEEP_UNKNOWN);
-       if (commit_argc < 2)
+       opts->commit_argc = parse_options(argc, argv, NULL, options, usage_str,
+                                       PARSE_OPT_KEEP_ARGV0 |
+                                       PARSE_OPT_KEEP_UNKNOWN);
+       if (opts->commit_argc < 2)
                usage_with_options(usage_str, options);
 
-       commit_argv = argv;
+       opts->commit_argv = argv;
 }
 
 struct commit_message {
@@ -240,20 +258,20 @@ static struct tree *empty_tree(void)
        return tree;
 }
 
-static NORETURN void die_dirty_index(const char *me)
+static NORETURN void die_dirty_index(struct replay_opts *opts)
 {
        if (read_cache_unmerged()) {
-               die_resolve_conflict(me);
+               die_resolve_conflict(action_name(opts));
        } else {
                if (advice_commit_before_merge) {
-                       if (action == REVERT)
+                       if (opts->action == REVERT)
                                die(_("Your local changes would be overwritten by revert.\n"
                                          "Please, commit your changes or stash them to proceed."));
                        else
                                die(_("Your local changes would be overwritten by cherry-pick.\n"
                                          "Please, commit your changes or stash them to proceed."));
                } else {
-                       if (action == REVERT)
+                       if (opts->action == REVERT)
                                die(_("Your local changes would be overwritten by revert.\n"));
                        else
                                die(_("Your local changes would be overwritten by cherry-pick.\n"));
@@ -274,7 +292,8 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from)
 
 static int do_recursive_merge(struct commit *base, struct commit *next,
                              const char *base_label, const char *next_label,
-                             unsigned char *head, struct strbuf *msgbuf)
+                             unsigned char *head, struct strbuf *msgbuf,
+                             struct replay_opts *opts)
 {
        struct merge_options o;
        struct tree *result, *next_tree, *base_tree, *head_tree;
@@ -295,7 +314,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
        next_tree = next ? next->tree : empty_tree();
        base_tree = base ? base->tree : empty_tree();
 
-       for (xopt = xopts; xopt != xopts + xopts_nr; xopt++)
+       for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++)
                parse_merge_opt(&o, *xopt);
 
        clean = merge_trees(&o,
@@ -306,7 +325,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
            (write_cache(index_fd, active_cache, active_nr) ||
             commit_locked_index(&index_lock)))
                /* TRANSLATORS: %s will be "revert" or "cherry-pick" */
-               die(_("%s: Unable to write new index file"), me);
+               die(_("%s: Unable to write new index file"), action_name(opts));
        rollback_lock_file(&index_lock);
 
        if (!clean) {
@@ -335,7 +354,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
  * If we are revert, or if our cherry-pick results in a hand merge,
  * we had better say that the current user is responsible for that.
  */
-static int run_git_commit(const char *defmsg)
+static int run_git_commit(const char *defmsg, struct replay_opts *opts)
 {
        /* 6 is max possible length of our args array including NULL */
        const char *args[6];
@@ -343,9 +362,9 @@ static int run_git_commit(const char *defmsg)
 
        args[i++] = "commit";
        args[i++] = "-n";
-       if (signoff)
+       if (opts->signoff)
                args[i++] = "-s";
-       if (!edit) {
+       if (!opts->edit) {
                args[i++] = "-F";
                args[i++] = defmsg;
        }
@@ -354,7 +373,7 @@ static int run_git_commit(const char *defmsg)
        return run_command_v_opt(args, RUN_GIT_CMD);
 }
 
-static int do_pick_commit(struct commit *commit)
+static int do_pick_commit(struct commit *commit, struct replay_opts *opts)
 {
        unsigned char head[20];
        struct commit *base, *next, *parent;
@@ -364,7 +383,7 @@ static int do_pick_commit(struct commit *commit)
        struct strbuf msgbuf = STRBUF_INIT;
        int res;
 
-       if (no_commit) {
+       if (opts->no_commit) {
                /*
                 * We do not intend to commit immediately.  We just want to
                 * merge the differences in, so let's compute the tree
@@ -377,7 +396,7 @@ static int do_pick_commit(struct commit *commit)
                if (get_sha1("HEAD", head))
                        die (_("You do not have a valid HEAD"));
                if (index_differs_from("HEAD", 0))
-                       die_dirty_index(me);
+                       die_dirty_index(opts);
        }
        discard_cache();
 
@@ -389,32 +408,32 @@ static int do_pick_commit(struct commit *commit)
                int cnt;
                struct commit_list *p;
 
-               if (!mainline)
+               if (!opts->mainline)
                        die(_("Commit %s is a merge but no -m option was given."),
                            sha1_to_hex(commit->object.sha1));
 
                for (cnt = 1, p = commit->parents;
-                    cnt != mainline && p;
+                    cnt != opts->mainline && p;
                     cnt++)
                        p = p->next;
-               if (cnt != mainline || !p)
+               if (cnt != opts->mainline || !p)
                        die(_("Commit %s does not have parent %d"),
-                           sha1_to_hex(commit->object.sha1), mainline);
+                           sha1_to_hex(commit->object.sha1), opts->mainline);
                parent = p->item;
-       } else if (0 < mainline)
+       } else if (0 < opts->mainline)
                die(_("Mainline was specified but commit %s is not a merge."),
                    sha1_to_hex(commit->object.sha1));
        else
                parent = commit->parents->item;
 
-       if (allow_ff && parent && !hashcmp(parent->object.sha1, head))
+       if (opts->allow_ff && parent && !hashcmp(parent->object.sha1, head))
                return fast_forward_to(commit->object.sha1, head);
 
        if (parent && parse_commit(parent) < 0)
                /* TRANSLATORS: The first %s will be "revert" or
                   "cherry-pick", the second %s a SHA1 */
                die(_("%s: cannot parse parent commit %s"),
-                   me, sha1_to_hex(parent->object.sha1));
+                   action_name(opts), sha1_to_hex(parent->object.sha1));
 
        if (get_message(commit, &msg) != 0)
                die(_("Cannot get commit message for %s"),
@@ -429,7 +448,7 @@ static int do_pick_commit(struct commit *commit)
 
        defmsg = git_pathdup("MERGE_MSG");
 
-       if (action == REVERT) {
+       if (opts->action == REVERT) {
                base = commit;
                base_label = msg.label;
                next = parent;
@@ -463,18 +482,18 @@ static int do_pick_commit(struct commit *commit)
                        strbuf_addstr(&msgbuf, p);
                }
 
-               if (record_origin) {
+               if (opts->record_origin) {
                        strbuf_addstr(&msgbuf, "(cherry picked from commit ");
                        strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
                        strbuf_addstr(&msgbuf, ")\n");
                }
-               if (!no_commit)
+               if (!opts->no_commit)
                        write_cherry_pick_head(commit);
        }
 
-       if (!strategy || !strcmp(strategy, "recursive") || action == REVERT) {
+       if (!opts->strategy || !strcmp(opts->strategy, "recursive") || opts->action == REVERT) {
                res = do_recursive_merge(base, next, base_label, next_label,
-                                        head, &msgbuf);
+                                        head, &msgbuf, opts);
                write_message(&msgbuf, defmsg);
        } else {
                struct commit_list *common = NULL;
@@ -484,23 +503,23 @@ static int do_pick_commit(struct commit *commit)
 
                commit_list_insert(base, &common);
                commit_list_insert(next, &remotes);
-               res = try_merge_command(strategy, xopts_nr, xopts, common,
-                                       sha1_to_hex(head), remotes);
+               res = try_merge_command(opts->strategy, opts->xopts_nr, opts->xopts,
+                                       common, sha1_to_hex(head), remotes);
                free_commit_list(common);
                free_commit_list(remotes);
        }
 
        if (res) {
-               error(action == REVERT
+               error(opts->action == REVERT
                      ? _("could not revert %s... %s")
                      : _("could not apply %s... %s"),
                      find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV),
                      msg.subject);
                print_advice();
-               rerere(allow_rerere_auto);
+               rerere(opts->allow_rerere_auto);
        } else {
-               if (!no_commit)
-                       res = run_git_commit(defmsg);
+               if (!opts->no_commit)
+                       res = run_git_commit(defmsg, opts);
        }
 
        free_message(&msg);
@@ -509,18 +528,18 @@ static int do_pick_commit(struct commit *commit)
        return res;
 }
 
-static void prepare_revs(struct rev_info *revs)
+static void prepare_revs(struct rev_info *revs, struct replay_opts *opts)
 {
        int argc;
 
        init_revisions(revs, NULL);
        revs->no_walk = 1;
-       if (action != REVERT)
+       if (opts->action != REVERT)
                revs->reverse = 1;
 
-       argc = setup_revisions(commit_argc, commit_argv, revs, NULL);
+       argc = setup_revisions(opts->commit_argc, opts->commit_argv, revs, NULL);
        if (argc > 1)
-               usage(*revert_or_cherry_pick_usage());
+               usage(*revert_or_cherry_pick_usage(opts));
 
        if (prepare_revision_walk(revs))
                die(_("revision walk setup failed"));
@@ -529,48 +548,48 @@ static void prepare_revs(struct rev_info *revs)
                die(_("empty commit set passed"));
 }
 
-static void read_and_refresh_cache(const char *me)
+static void read_and_refresh_cache(struct replay_opts *opts)
 {
        static struct lock_file index_lock;
        int index_fd = hold_locked_index(&index_lock, 0);
        if (read_index_preload(&the_index, NULL) < 0)
-               die(_("git %s: failed to read the index"), me);
+               die(_("git %s: failed to read the index"), action_name(opts));
        refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL);
        if (the_index.cache_changed) {
                if (write_index(&the_index, index_fd) ||
                    commit_locked_index(&index_lock))
-                       die(_("git %s: failed to refresh the index"), me);
+                       die(_("git %s: failed to refresh the index"), action_name(opts));
        }
        rollback_lock_file(&index_lock);
 }
 
-static int revert_or_cherry_pick(int argc, const char **argv)
+static int revert_or_cherry_pick(int argc, const char **argv,
+                               struct replay_opts *opts)
 {
        struct rev_info revs;
        struct commit *commit;
 
        git_config(git_default_config, NULL);
-       me = action == REVERT ? "revert" : "cherry-pick";
-       setenv(GIT_REFLOG_ACTION, me, 0);
-       parse_args(argc, argv);
+       setenv(GIT_REFLOG_ACTION, action_name(opts), 0);
+       parse_args(argc, argv, opts);
 
-       if (allow_ff) {
-               if (signoff)
+       if (opts->allow_ff) {
+               if (opts->signoff)
                        die(_("cherry-pick --ff cannot be used with --signoff"));
-               if (no_commit)
+               if (opts->no_commit)
                        die(_("cherry-pick --ff cannot be used with --no-commit"));
-               if (record_origin)
+               if (opts->record_origin)
                        die(_("cherry-pick --ff cannot be used with -x"));
-               if (edit)
+               if (opts->edit)
                        die(_("cherry-pick --ff cannot be used with --edit"));
        }
 
-       read_and_refresh_cache(me);
+       read_and_refresh_cache(opts);
 
-       prepare_revs(&revs);
+       prepare_revs(&revs, opts);
 
        while ((commit = get_revision(&revs))) {
-               int res = do_pick_commit(commit);
+               int res = do_pick_commit(commit, opts);
                if (res)
                        return res;
        }
@@ -580,14 +599,20 @@ static int revert_or_cherry_pick(int argc, const char **argv)
 
 int cmd_revert(int argc, const char **argv, const char *prefix)
 {
+       struct replay_opts opts;
+
+       memset(&opts, 0, sizeof(opts));
        if (isatty(0))
-               edit = 1;
-       action = REVERT;
-       return revert_or_cherry_pick(argc, argv);
+               opts.edit = 1;
+       opts.action = REVERT;
+       return revert_or_cherry_pick(argc, argv, &opts);
 }
 
 int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
 {
-       action = CHERRY_PICK;
-       return revert_or_cherry_pick(argc, argv);
+       struct replay_opts opts;
+
+       memset(&opts, 0, sizeof(opts));
+       opts.action = CHERRY_PICK;
+       return revert_or_cherry_pick(argc, argv, &opts);
 }