From 2ff03f8c1e9cc3103d5702ac293049fba0f7e675 Mon Sep 17 00:00:00 2001
From: Simon Josefsson <simon@josefsson.org>
Date: Wed, 27 Aug 2008 12:00:15 +0200
Subject: [PATCH] Invoke git-log if not used as a pipe.

---
 git2cl | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

diff --git a/git2cl b/git2cl
index 9248895..534b78a 100755
--- a/git2cl
+++ b/git2cl
@@ -10,6 +10,8 @@
 #   - skip "merge branch" statements as they don't
 #     have information about files (i.e. we never
 #     go into $state 2)
+#   - behaves like a pipe/filter if input is given from the CLI
+#     else it calls git log by itself
 #
 # The functions mywrap, last_line_len, wrap_log_entry are derived from
 # the cvs2cl tool, see <http://www.red-bean.com/cvs2cl/>:
@@ -34,6 +36,7 @@
 use strict;
 use POSIX qw(strftime);
 use Text::Wrap qw(wrap);
+use FileHandle;
 
 use constant EMPTY_LOG_MESSAGE => '*** empty log message ***';
 
@@ -53,6 +56,16 @@ my %month = (
     'Nov'=>10,
     'Dec'=>11,
 );
+
+my $fh = new FileHandle;
+
+sub key_ready
+{
+    my ($rin, $nfd);
+    vec($rin, fileno(STDIN), 1) = 1;
+    return $nfd = select($rin, undef, undef, 0);
+}
+
 sub strptime {
     my $str = shift;
     return undef if not defined $str;
@@ -275,7 +288,22 @@ my $done = 0;
 
 $state = 0;
 
-while (my $_l = <>) {
+# if reading from STDIN, we assume that we are
+# getting git log as input
+if (key_ready())
+{
+
+    #my $dummyfh; # don't care about writing
+    #($fh,$dummyfh) = FileHandle::pipe;
+    $fh->fdopen(*STDIN, 'r');
+}
+else
+{
+    $fh->open("LC_ALL=C git log --pretty --numstat --summary|")
+	or die("Cannot execute git log...$!\n");
+}
+
+while (my $_l = <$fh>) {
     #print STDERR "debug ($state, " . (@date ? (strftime "%Y-%m-%d", @date) : "") . "): `$_'\n";
     if ($state == 0) {
 	if ($_l =~ m,^Author: (.*),) {
-- 
2.11.4.GIT