mailinfo: with -b, keep space after [foo]
[gitweb.git] / builtin / revert.c
index bb6e9e83b756b47dae449064ca7762fe3558fc0e..1f27c63343904a969e60ab19408495007f59d133 100644 (file)
@@ -3,7 +3,6 @@
 #include "object.h"
 #include "commit.h"
 #include "tag.h"
-#include "wt-status.h"
 #include "run-command.h"
 #include "exec_cmd.h"
 #include "utf8.h"
@@ -44,7 +43,11 @@ 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;
 
 #define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
 
@@ -55,6 +58,17 @@ static const char * const *revert_or_cherry_pick_usage(void)
        return action == REVERT ? revert_usage : cherry_pick_usage;
 }
 
+static int option_parse_x(const struct option *opt,
+                         const char *arg, int unset)
+{
+       if (unset)
+               return 0;
+
+       ALLOC_GROW(xopts, xopts_nr + 1, xopts_alloc);
+       xopts[xopts_nr++] = xstrdup(arg);
+       return 0;
+}
+
 static void parse_args(int argc, const char **argv)
 {
        const char * const * usage_str = revert_or_cherry_pick_usage();
@@ -62,11 +76,14 @@ static void parse_args(int argc, const char **argv)
        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('r', NULL, &noop, "no-op (backward compatibility)"),
+               { 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",
+                       "option for merge strategy", option_parse_x),
                OPT_END(),
                OPT_END(),
                OPT_END(),
@@ -79,7 +96,7 @@ static void parse_args(int argc, const char **argv)
                        OPT_END(),
                };
                if (parse_options_concat(options, ARRAY_SIZE(options), cp_extra))
-                       die("program error");
+                       die(_("program error"));
        }
 
        commit_argc = parse_options(argc, argv, NULL, options, usage_str,
@@ -151,7 +168,7 @@ static char *get_encoding(const char *message)
        const char *p = message, *eol;
 
        if (!p)
-               die ("Could not read commit message of %s",
+               die (_("Could not read commit message of %s"),
                                sha1_to_hex(commit->object.sha1));
        while (*p && *p != '\n') {
                for (eol = p + 1; *eol && *eol != '\n'; eol++)
@@ -181,54 +198,20 @@ static void add_message_to_msg(struct strbuf *msgbuf, const char *message)
        strbuf_addstr(msgbuf, p);
 }
 
-static void set_author_ident_env(const char *message)
+static void write_cherry_pick_head(void)
 {
-       const char *p = message;
-       if (!p)
-               die ("Could not read commit message of %s",
-                               sha1_to_hex(commit->object.sha1));
-       while (*p && *p != '\n') {
-               const char *eol;
-
-               for (eol = p; *eol && *eol != '\n'; eol++)
-                       ; /* do nothing */
-               if (!prefixcmp(p, "author ")) {
-                       char *line, *pend, *email, *timestamp;
-
-                       p += 7;
-                       line = xmemdupz(p, eol - p);
-                       email = strchr(line, '<');
-                       if (!email)
-                               die ("Could not extract author email from %s",
-                                       sha1_to_hex(commit->object.sha1));
-                       if (email == line)
-                               pend = line;
-                       else
-                               for (pend = email; pend != line + 1 &&
-                                               isspace(pend[-1]); pend--);
-                                       ; /* do nothing */
-                       *pend = '\0';
-                       email++;
-                       timestamp = strchr(email, '>');
-                       if (!timestamp)
-                               die ("Could not extract author time from %s",
-                                       sha1_to_hex(commit->object.sha1));
-                       *timestamp = '\0';
-                       for (timestamp++; *timestamp && isspace(*timestamp);
-                                       timestamp++)
-                               ; /* do nothing */
-                       setenv("GIT_AUTHOR_NAME", line, 1);
-                       setenv("GIT_AUTHOR_EMAIL", email, 1);
-                       setenv("GIT_AUTHOR_DATE", timestamp, 1);
-                       free(line);
-                       return;
-               }
-               p = eol;
-               if (*p == '\n')
-                       p++;
-       }
-       die ("No author information found in %s",
-                       sha1_to_hex(commit->object.sha1));
+       int fd;
+       struct strbuf buf = STRBUF_INIT;
+
+       strbuf_addf(&buf, "%s\n", sha1_to_hex(commit->object.sha1));
+
+       fd = open(git_path("CHERRY_PICK_HEAD"), O_WRONLY | O_CREAT, 0666);
+       if (fd < 0)
+               die_errno(_("Could not open '%s' for writing"),
+                         git_path("CHERRY_PICK_HEAD"));
+       if (write_in_full(fd, buf.buf, buf.len) != buf.len || close(fd))
+               die_errno(_("Could not write to '%s'"), git_path("CHERRY_PICK_HEAD"));
+       strbuf_release(&buf);
 }
 
 static void advise(const char *advice, ...)
@@ -246,15 +229,18 @@ static void print_advice(void)
 
        if (msg) {
                fprintf(stderr, "%s\n", msg);
+               /*
+                * A conflict has occured but the porcelain
+                * (typically rebase --interactive) wants to take care
+                * of the commit itself so remove CHERRY_PICK_HEAD
+                */
+               unlink(git_path("CHERRY_PICK_HEAD"));
                return;
        }
 
        advise("after resolving the conflicts, mark the corrected paths");
        advise("with 'git add <paths>' or 'git rm <paths>'");
-
-       if (action == CHERRY_PICK)
-               advise("and commit the result with 'git commit -c %s'",
-                      find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV));
+       advise("and commit the result with 'git commit'");
 }
 
 static void write_message(struct strbuf *msgbuf, const char *filename)
@@ -264,10 +250,10 @@ static void write_message(struct strbuf *msgbuf, const char *filename)
        int msg_fd = hold_lock_file_for_update(&msg_file, filename,
                                               LOCK_DIE_ON_ERROR);
        if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0)
-               die_errno("Could not write to %s.", filename);
+               die_errno(_("Could not write to %s."), filename);
        strbuf_release(msgbuf);
        if (commit_lock_file(&msg_file) < 0)
-               die("Error wrapping up %s", filename);
+               die(_("Error wrapping up %s"), filename);
 }
 
 static struct tree *empty_tree(void)
@@ -285,11 +271,19 @@ static NORETURN void die_dirty_index(const char *me)
        if (read_cache_unmerged()) {
                die_resolve_conflict(me);
        } else {
-               if (advice_commit_before_merge)
-                       die("Your local changes would be overwritten by %s.\n"
-                           "Please, commit your changes or stash them to proceed.", me);
-               else
-                       die("Your local changes would be overwritten by %s.\n", me);
+               if (advice_commit_before_merge) {
+                       if (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)
+                               die(_("Your local changes would be overwritten by revert.\n"));
+                       else
+                               die(_("Your local changes would be overwritten by cherry-pick.\n"));
+               }
        }
 }
 
@@ -311,18 +305,13 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
        struct merge_options o;
        struct tree *result, *next_tree, *base_tree, *head_tree;
        int clean, index_fd;
+       const char **xopt;
        static struct lock_file index_lock;
 
        index_fd = hold_locked_index(&index_lock, 1);
 
        read_cache();
 
-       /*
-        * NEEDSWORK: cherry-picking between branches with
-        * different end-of-line normalization is a pain;
-        * plumb in an option to set o.renormalize?
-        * (or better: arbitrary -X options)
-        */
        init_merge_options(&o);
        o.ancestor = base ? base_label : "(empty tree)";
        o.branch1 = "HEAD";
@@ -332,6 +321,9 @@ 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++)
+               parse_merge_opt(&o, *xopt);
+
        clean = merge_trees(&o,
                            head_tree,
                            next_tree, base_tree, &result);
@@ -339,7 +331,8 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
        if (active_cache_changed &&
            (write_cache(index_fd, active_cache, active_nr) ||
             commit_locked_index(&index_lock)))
-               die("%s: Unable to write new index file", me);
+               /* TRANSLATORS: %s will be "revert" or "cherry-pick" */
+               die(_("%s: Unable to write new index file"), me);
        rollback_lock_file(&index_lock);
 
        if (!clean) {
@@ -405,18 +398,16 @@ static int do_pick_commit(void)
                 * to work on.
                 */
                if (write_cache_as_tree(head, 0, NULL))
-                       die ("Your index file is unmerged.");
+                       die (_("Your index file is unmerged."));
        } else {
                if (get_sha1("HEAD", head))
-                       die ("You do not have a valid HEAD");
+                       die (_("You do not have a valid HEAD"));
                if (index_differs_from("HEAD", 0))
                        die_dirty_index(me);
        }
        discard_cache();
 
        if (!commit->parents) {
-               if (action == REVERT)
-                       die ("Cannot revert a root commit");
                parent = NULL;
        }
        else if (commit->parents->next) {
@@ -425,7 +416,7 @@ static int do_pick_commit(void)
                struct commit_list *p;
 
                if (!mainline)
-                       die("Commit %s is a merge but no -m option was given.",
+                       die(_("Commit %s is a merge but no -m option was given."),
                            sha1_to_hex(commit->object.sha1));
 
                for (cnt = 1, p = commit->parents;
@@ -433,11 +424,11 @@ static int do_pick_commit(void)
                     cnt++)
                        p = p->next;
                if (cnt != mainline || !p)
-                       die("Commit %s does not have parent %d",
+                       die(_("Commit %s does not have parent %d"),
                            sha1_to_hex(commit->object.sha1), mainline);
                parent = p->item;
        } else if (0 < mainline)
-               die("Mainline was specified but commit %s is not a merge.",
+               die(_("Mainline was specified but commit %s is not a merge."),
                    sha1_to_hex(commit->object.sha1));
        else
                parent = commit->parents->item;
@@ -446,11 +437,13 @@ static int do_pick_commit(void)
                return fast_forward_to(commit->object.sha1, head);
 
        if (parent && parse_commit(parent) < 0)
-               die("%s: cannot parse parent commit %s",
+               /* 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));
 
        if (get_message(commit->buffer, &msg) != 0)
-               die("Cannot get commit message for %s",
+               die(_("Cannot get commit message for %s"),
                                sha1_to_hex(commit->object.sha1));
 
        /*
@@ -472,7 +465,7 @@ static int do_pick_commit(void)
                strbuf_addstr(&msgbuf, "\"\n\nThis reverts commit ");
                strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
 
-               if (commit->parents->next) {
+               if (commit->parents && commit->parents->next) {
                        strbuf_addstr(&msgbuf, ", reversing\nchanges made to ");
                        strbuf_addstr(&msgbuf, sha1_to_hex(parent->object.sha1));
                }
@@ -482,13 +475,14 @@ static int do_pick_commit(void)
                base_label = msg.parent_label;
                next = commit;
                next_label = msg.label;
-               set_author_ident_env(msg.message);
                add_message_to_msg(&msgbuf, msg.message);
                if (no_replay) {
                        strbuf_addstr(&msgbuf, "(cherry picked from commit ");
                        strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
                        strbuf_addstr(&msgbuf, ")\n");
                }
+               if (!no_commit)
+                       write_cherry_pick_head();
        }
 
        if (!strategy || !strcmp(strategy, "recursive") || action == REVERT) {
@@ -503,15 +497,16 @@ static int do_pick_commit(void)
 
                commit_list_insert(base, &common);
                commit_list_insert(next, &remotes);
-               res = try_merge_command(strategy, common,
+               res = try_merge_command(strategy, xopts_nr, xopts, common,
                                        sha1_to_hex(head), remotes);
                free_commit_list(common);
                free_commit_list(remotes);
        }
 
        if (res) {
-               error("could not %s %s... %s",
-                     action == REVERT ? "revert" : "apply",
+               error(action == REVERT
+                     ? _("could not revert %s... %s")
+                     : _("could not apply %s... %s"),
                      find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV),
                      msg.subject);
                print_advice();
@@ -541,10 +536,10 @@ static void prepare_revs(struct rev_info *revs)
                usage(*revert_or_cherry_pick_usage());
 
        if (prepare_revision_walk(revs))
-               die("revision walk setup failed");
+               die(_("revision walk setup failed"));
 
        if (!revs->commits)
-               die("empty commit set passed");
+               die(_("empty commit set passed"));
 }
 
 static void read_and_refresh_cache(const char *me)
@@ -552,12 +547,12 @@ static void read_and_refresh_cache(const char *me)
        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"), me);
        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"), me);
        }
        rollback_lock_file(&index_lock);
 }
@@ -573,13 +568,13 @@ static int revert_or_cherry_pick(int argc, const char **argv)
 
        if (allow_ff) {
                if (signoff)
-                       die("cherry-pick --ff cannot be used with --signoff");
+                       die(_("cherry-pick --ff cannot be used with --signoff"));
                if (no_commit)
-                       die("cherry-pick --ff cannot be used with --no-commit");
+                       die(_("cherry-pick --ff cannot be used with --no-commit"));
                if (no_replay)
-                       die("cherry-pick --ff cannot be used with -x");
+                       die(_("cherry-pick --ff cannot be used with -x"));
                if (edit)
-                       die("cherry-pick --ff cannot be used with --edit");
+                       die(_("cherry-pick --ff cannot be used with --edit"));
        }
 
        read_and_refresh_cache(me);