log_ref_setup(): improve robustness against races

diff --git a/commit.c b/commit.c
index aada266f9a85e379ab2d2603b82071be4bb19ded..2cf85158b4899b664a3cbae8d0777f5a9e473318 100644 (file)
--- a/commit.c
+++ b/commit.c
@@ -1511,9 +1511,9 @@ static int verify_utf8(struct strbuf *buf)
 }
 
 static const char commit_utf8_warn[] =
-"Warning: commit message did not conform to UTF-8.\n"
-"You may want to amend it after fixing the message, or set the config\n"
-"variable i18n.commitencoding to the encoding your project uses.\n";
+N_("Warning: commit message did not conform to UTF-8.\n"
+   "You may want to amend it after fixing the message, or set the config\n"
+   "variable i18n.commitencoding to the encoding your project uses.\n");
 
 int commit_tree_extended(const char *msg, size_t msg_len,
                         const unsigned char *tree,
@@ -1566,7 +1566,7 @@ int commit_tree_extended(const char *msg, size_t msg_len,
 
        /* And check the encoding */
        if (encoding_is_utf8 && !verify_utf8(&buffer))
-               fprintf(stderr, commit_utf8_warn);
+               fprintf(stderr, _(commit_utf8_warn));
 
        if (sign_commit && do_sign_commit(&buffer, sign_commit))
                return -1;
@@ -1649,7 +1649,7 @@ const char *find_commit_header(const char *msg, const char *key, size_t *out_len
 }
 
 /*
- * Inspect sb and determine the true "end" of the log message, in
+ * Inspect the given string and determine the true "end" of the log message, in
  * order to find where to put a new Signed-off-by: line.  Ignored are
  * trailing comment lines and blank lines, and also the traditional
  * "Conflicts:" block that is not commented out, so that we can use
@@ -1659,37 +1659,37 @@ const char *find_commit_header(const char *msg, const char *key, size_t *out_len
  * Returns the number of bytes from the tail to ignore, to be fed as
  * the second parameter to append_signoff().
  */
-int ignore_non_trailer(struct strbuf *sb)
+int ignore_non_trailer(const char *buf, size_t len)
 {
        int boc = 0;
        int bol = 0;
        int in_old_conflicts_block = 0;
 
-       while (bol < sb->len) {
-               char *next_line;
+       while (bol < len) {
+               const char *next_line = memchr(buf + bol, '\n', len - bol);
 
-               if (!(next_line = memchr(sb->buf + bol, '\n', sb->len - bol)))
-                       next_line = sb->buf + sb->len;
+               if (!next_line)
+                       next_line = buf + len;
                else
                        next_line++;
 
-               if (sb->buf[bol] == comment_line_char || sb->buf[bol] == '\n') {
+               if (buf[bol] == comment_line_char || buf[bol] == '\n') {
                        /* is this the first of the run of comments? */
                        if (!boc)
                                boc = bol;
                        /* otherwise, it is just continuing */
-               } else if (starts_with(sb->buf + bol, "Conflicts:\n")) {
+               } else if (starts_with(buf + bol, "Conflicts:\n")) {
                        in_old_conflicts_block = 1;
                        if (!boc)
                                boc = bol;
-               } else if (in_old_conflicts_block && sb->buf[bol] == '\t') {
+               } else if (in_old_conflicts_block && buf[bol] == '\t') {
                        ; /* a pathname in the conflicts block */
                } else if (boc) {
                        /* the previous was not trailing comment */
                        boc = 0;
                        in_old_conflicts_block = 0;
                }
-               bol = next_line - sb->buf;
+               bol = next_line - buf;
        }
-       return boc ? sb->len - boc : 0;
+       return boc ? len - boc : 0;
 }