badcommit-fixup: reorganise arg parsing

[dgit-junk.git] / badcommit-fixup

diff --git a/badcommit-fixup b/badcommit-fixup
index 2eeaefe1402901bbb149ff8162df59fe9efb09ed..ca2e0dfbdd28a8f02db50d38cd45244c06464d1b 100755 (executable)
--- a/badcommit-fixup
+++ b/badcommit-fixup
@@ -1,11 +1,29 @@
 #!/usr/bin/perl -w
 
+# usage:
+#   .../badcommit-fixup [-- --test
+#   .../badcommit-fixup --real
+
 use strict;
 
 use POSIX;
 use IPC::Open2;
 use Data::Dumper;
 
+my $real;
+
+foreach my $a (@ARGV) {
+    if ($a eq '--test') {
+       $real = 0;
+    } elsif ($a eq '--real') {
+       $real = 1;
+    } else {
+       die "$a ?";
+    }
+}
+
+die unless defined $real;
+
 my $gcfpid = open2 \*GCFO, \*GCFI, 'git cat-file --batch' or die $!;
 
 our %count;
@@ -96,7 +114,7 @@ sub rewrite_tag ($) {
 }
 
 $!=0; $?=0;
-my $refs=`git-for-each-ref`;
+my $refs=`git for-each-ref`;
 die "$? $!" if $?;
 
 chomp $refs;
@@ -117,7 +135,45 @@ foreach my $rline (split /\n/, $refs) {
        next;
     }
     next if $rewrite eq $obj;
-    push @updates, [ $refname, $rewrite ];
+    push @updates, [ $refname, $obj, $rewrite ];
+}
+
+open U, "|git update-ref -m 'dgit bad commit fixup' --stdin" or die $!;
+
+if ($real) {
+    $!=0; $?=0;
+    my $bare = `git rev-parse --is-bare-repository`;
+    die "$? $!" if $?;
+    if ($bare eq 'false') {
+       print "detaching your HEAD\n" or die $!;
+       system 'git checkout --detach' and die "$! $?";
+    }
 }
 
-print Dumper(\@updates, \%count);
+for my $up (@updates) {
+    my ($ref, $old, $new) = @$up;
+    my $otherref = $ref;
+    $otherref =~ s{^refs/}{};
+    if ($real) {
+       print U <<END or die $!;
+create refs/dgit-badcommit/$otherref $old
+update $ref $new $old
+END
+    } else {
+       print U <<END or die $!;
+update refs/dgit-badfixuptest/$otherref $new
+END
+    }
+}
+
+$?=0; $!=0;
+close U or die "$? $!";
+die $? if $?;
+
+print Dumper(\%count);
+
+if ($real) {
+    print "old values saved in refs/dgit-badcommit/\n" or die $!;
+} else {
+    print "testing output saved in refs/dgit-badfixuptest/\n" or die $!;
+}