[PATCH] solver_git: workaround truncated `b' path in patch

[PATCH] solver_git: workaround truncated `b' path in patch

[Eric Wong]

For messages like <780a3faf-9e44-64f4-a354-bdee39af3af5@redhat.com>
where the "diff --git" line is truncated, favor the filename from
the "+++ b/" line.
---
 lib/PublicInbox/SolverGit.pm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/PublicInbox/SolverGit.pm b/lib/PublicInbox/SolverGit.pm
index b5f6b96e..898ca72d 100644
--- a/lib/PublicInbox/SolverGit.pm
+++ b/lib/PublicInbox/SolverGit.pm
@@ -176,7 +176,7 @@ sub extract_diff ($$) {
 		(?:^---\x20$FN$LF)
 
 		# "+++ b/foo.c" sets post-filename ($11) in case
-		# $3 is missing
+		# $3 is missing or truncated
 		(?:^\+{3}\x20$FN$LF)
 
 		# the meat of the diff, including "^\\No newline ..."
@@ -193,7 +193,8 @@ sub extract_diff ($$) {
 		mode_a => $5 // $8 // $4, # new (file) // unchanged // old
 	};
 	my $path_a = $2 // $10;
-	my $path_b = $3 // $11;
+	my $path_b = defined $11 && defined $3 && length $11 > length $3 ?
+			$11 // $3 : $3 // $11;
 	my $patch = $9;
 
 	# don't care for leading 'a/' and 'b/'