config: support ->urlmatch method for -watch

Since we have IMAP client support in -watch; make sure per-URL
settings are familiar to git users by taking advantage of git's
URL matching abilities.

This requires git 1.8.5+, which most users ought to have
(though base CentOS 7 is on 1.8.3).

1 files changed, 20 insertions, 1 deletions

diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index 19535beb..c0e2cc57 100644
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -9,7 +9,7 @@
 
 package PublicInbox::Config;
 use strict;
-use warnings;
+use v5.10.1;
 use PublicInbox::Inbox;
 use PublicInbox::Spawn qw(popen_rd);
 
@@ -462,4 +462,23 @@ sub _fill {
         $ibx
 }
 
+sub urlmatch {
+        my ($self, $key, $url) = @_;
+        state $urlmatch_broken; # requires git 1.8.5
+        return if $urlmatch_broken;
+        my $file = default_file();
+        my $cmd = [qw/git config -z --includes --get-urlmatch/,
+                "--file=$file", $key, $url ];
+        my $fh = popen_rd($cmd);
+        local $/ = "\0";
+        my $val = <$fh>;
+        if (close($fh)) {
+                chomp($val);
+                $val;
+        } else {
+                $urlmatch_broken = 1 if (($? >> 8) != 1);
+                undef;
+        }
+}
+
 1;