Merge branch 'jn/merge-renormalize'

[thirdparty/git.git] / builtin / revert.c

diff --git a/builtin/revert.c b/builtin/revert.c
index e261fb23916724e9bbb3fa664f2aba13f6ada83e..4b47ace36b51566acb5b748f679070f02cbbf568 100644 (file)
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -102,9 +102,9 @@ struct commit_message {
 static int get_message(const char *raw_message, struct commit_message *out)
 {
        const char *encoding;
-       const char *p, *abbrev, *eol;
+       const char *abbrev, *subject;
+       int abbrev_len, subject_len;
        char *q;
-       int abbrev_len, oneline_len;
 
        if (!raw_message)
                return -1;
@@ -125,27 +125,17 @@ static int get_message(const char *raw_message, struct commit_message *out)
        abbrev = find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV);
        abbrev_len = strlen(abbrev);
 
-       /* Find beginning and end of commit subject. */
-       p = out->message;
-       while (*p && (*p != '\n' || p[1] != '\n'))
-               p++;
-       if (*p) {
-               p += 2;
-               for (eol = p + 1; *eol && *eol != '\n'; eol++)
-                       ; /* do nothing */
-       } else
-               eol = p;
-       oneline_len = eol - p;
+       subject_len = find_commit_subject(out->message, &subject);
 
        out->parent_label = xmalloc(strlen("parent of ") + abbrev_len +
-                             strlen("... ") + oneline_len + 1);
+                             strlen("... ") + subject_len + 1);
        q = out->parent_label;
        q = mempcpy(q, "parent of ", strlen("parent of "));
        out->label = q;
        q = mempcpy(q, abbrev, abbrev_len);
        q = mempcpy(q, "... ", strlen("... "));
        out->subject = q;
-       q = mempcpy(q, p, oneline_len);
+       q = mempcpy(q, subject, subject_len);
        *q = '\0';
        return 0;
 }
@@ -241,27 +231,30 @@ static void set_author_ident_env(const char *message)
                        sha1_to_hex(commit->object.sha1));
 }
 
-static char *help_msg(void)
+static void advise(const char *advice, ...)
 {
-       struct strbuf helpbuf = STRBUF_INIT;
-       char *msg = getenv("GIT_CHERRY_PICK_HELP");
+       va_list params;
 
-       if (msg)
-               return msg;
+       va_start(params, advice);
+       vreportf("hint: ", advice, params);
+       va_end(params);
+}
 
-       strbuf_addstr(&helpbuf, "  After resolving the conflicts,\n"
-               "mark the corrected paths with 'git add <paths>' or 'git rm <paths>'\n"
-               "and commit the result");
+static void print_advice(void)
+{
+       char *msg = getenv("GIT_CHERRY_PICK_HELP");
 
-       if (action == CHERRY_PICK) {
-               strbuf_addf(&helpbuf, " with: \n"
-                       "\n"
-                       "        git commit -c %s\n",
-                           sha1_to_hex(commit->object.sha1));
+       if (msg) {
+               fprintf(stderr, "%s\n", msg);
+               return;
        }
-       else
-               strbuf_addch(&helpbuf, '.');
-       return strbuf_detach(&helpbuf, NULL);
+
+       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));
 }
 
 static void write_message(struct strbuf *msgbuf, const char *filename)
@@ -323,6 +316,13 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
        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";
@@ -395,7 +395,6 @@ static int do_pick_commit(void)
        struct commit_message msg = { NULL, NULL, NULL, NULL, NULL };
        char *defmsg = NULL;
        struct strbuf msgbuf = STRBUF_INIT;
-       struct strbuf mebuf = STRBUF_INIT;
        int res;
 
        if (no_commit) {
@@ -492,9 +491,6 @@ static int do_pick_commit(void)
                }
        }
 
-       strbuf_addf(&mebuf, "%s of commit %s", me,
-                   find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV));
-
        if (!strategy || !strcmp(strategy, "recursive") || action == REVERT) {
                res = do_recursive_merge(base, next, base_label, next_label,
                                         head, &msgbuf);
@@ -503,7 +499,6 @@ static int do_pick_commit(void)
                struct commit_list *common = NULL;
                struct commit_list *remotes = NULL;
 
-               strbuf_addf(&mebuf, " with strategy %s", strategy);
                write_message(&msgbuf, defmsg);
 
                commit_list_insert(base, &common);
@@ -515,17 +510,17 @@ static int do_pick_commit(void)
        }
 
        if (res) {
-               fprintf(stderr, "Automatic %s failed.%s\n",
-                       mebuf.buf, help_msg());
+               error("could not %s %s... %s",
+                     action == REVERT ? "revert" : "apply",
+                     find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV),
+                     msg.subject);
+               print_advice();
                rerere(allow_rerere_auto);
        } else {
                if (!no_commit)
                        res = run_git_commit(defmsg);
-               if (!res)
-                       fprintf(stderr, "Finished %s.\n", mebuf.buf);
        }
 
-       strbuf_release(&mebuf);
        free_message(&msg);
        free(defmsg);