X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=tig.pl;h=d7272a3183981ad8040d2c963f9f6fe1a4e03bf5;hb=cf2f4142baba6dc0bcc9d8af37e83cb8ca3add0e;hp=5fc7625ea46ff91162aab61c897dc3fdc06790f3;hpb=038da645d825eb46018d0e92317594e54b37250e;p=config%2Fdotfiles.git

diff --git a/tig.pl b/tig.pl
index 5fc7625..d7272a3 100755
--- a/tig.pl
+++ b/tig.pl
@@ -40,8 +40,25 @@ my $format = '%x00'         # separator from --graph
            . '%an' . '%x00' # author name
            . '%s'  . '%x00' # subject
            . '%d';          # ref names
-my $cmd = "git log --all --graph --format='$format'";
-open my $fh, '-|', $cmd or die $!;
+my @cmd = ('git', 'log', '--graph', "--format=$format",
+           # use either given arguments or --all to list all commits
+           (scalar @ARGV) ? @ARGV : '--all');
+open my $fh, '-|', @cmd or die $!;
+
+my $pager = $ENV{PAGER};
+# Try to find an usable pager without searching $PATH.
+if (not defined $pager) {
+    foreach my $path (qw(/usr/bin/less /bin/less /usr/bin/more /bin/more)) {
+        next if not -x $path;
+
+        $pager = $path;
+        last;
+    }
+}
+# Use a pager if STDOUT is a terminal.
+if (-t STDOUT and defined $pager) {
+    open STDOUT, '|-', $pager or die $!;
+}
 
 while (my $line = <$fh>) {
     # History graph line.
@@ -51,7 +68,7 @@ while (my $line = <$fh>) {
     }
 
     # Commit line.
-    $line =~ /^([ *|]+)\x00(.+)\x00(.+)\x00(.+)\x00(.+)\x00(.*)$/
+    $line =~ /^([ *|.\\-]+)\x00(.+)\x00(.+)\x00(.+)\x00(.*)\x00(.*)$/
         or die $line;
     my $prefix  = $1;
     my $hash    = colored($2, $color_hash);
@@ -94,3 +111,9 @@ while (my $line = <$fh>) {
 }
 
 close $fh or die $!;
+
+# Necessary for the redirection to a pager or the pager terminates after our
+# script finishes without displaying all data.
+if (defined $pager) {
+    close STDOUT or die $!;
+}