split_ident_line(): make best effort when parsing author/committer line

Commits made by ancient version of Git allowed committer without
human readable name, like this (00213b17c in the kernel history):

    tree 6947dba41f8b0e7fe7bccd41a4840d6de6a27079
    parent 352dd1df32e672be4cff71132eb9c06a257872fe
    author Petr Baudis <pasky@ucw.cz> 1135223044 +0100
    committer  <sam@mars.ravnborg.org> 1136151043 +0100

    kconfig: Remove support for lxdialog --checklist

    ...

    Signed-off-by: Petr Baudis <pasky@suse.cz>
    Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

When fed such a commit, --format='%ci' fails to parse it, and gives
back an empty string.  Update the split_ident_line() to be a bit
more lenient when parsing, but make sure the caller that wants to
pick up sane value from its return value does its own validation.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/ident.c b/ident.c
index 443c0751bd..484e0a9803 100644
--- a/ident.c
+++ b/ident.c
@@ -210,8 +210,10 @@ int split_ident_line(struct ident_split *split, const char *line, int len)
 			split->name_end = cp + 1;
 			break;
 		}
-	if (!split->name_end)
-		return status;
+	if (!split->name_end) {
+		/* no human readable name */
+		split->name_end = split->name_begin;
+	}
 
 	for (cp = split->mail_begin; cp < line + len; cp++)
 		if (*cp == '>') {