badcommit-fixup: wip

[dgit.git] / badcommit-fixup

diff --git a/badcommit-fixup b/badcommit-fixup
index 58ad12d7d6e5e36d97f557c0d1d6436634e8be60..af4b89d2bbb30a39e6d78a93adcd849e9bbf1a72 100755 (executable)
--- a/badcommit-fixup
+++ b/badcommit-fixup
@@ -4,38 +4,53 @@ use strict;
 
 use POSIX;
 use IPC::Open2;
+use Data::Dumper;
 
-$!=0; $?=0;
-my $refs=`git-for-each-ref`;
-die "$? $!" if $?;
+my $gcfpid = open2 \*GCFO, \*GCFI, 'git cat-file --batch' or die $!;
 
-chomp $refs;
+our %count;
 
-my $gcfpid = open2 \*GCFO, \*GCFI, 'git cat-file --batch' or die $!;
+no warnings qw(recursion);
 
 sub getobj ($$) {
     my ($obj, $type) = @_;
     print GCFI $obj, "\n" or die $!;
     my $x = <GCFO>;
-    $x =~ m/^\w+ (\w+) (\d+)\n/ or die "$obj ?";
-    my ($gtype, $gsize) = ($1,$2,$3);
+    my ($gtype, $gsize) = $x =~ m/^\w+ (\w+) (\d+)\n/ or die "$obj ?";
     $gtype eq $type or die "$obj $gtype != $type ?";
     my $gdata;
-    read GFCO, $gdata, $gsize == $gsize or die "$obj $!";
-    $x = <GFCO>;
-    $x eq "\n" or die "$obj $!";
+    (read GCFO, $gdata, $gsize) == $gsize or die "$obj $!";
+#print STDERR ">$obj|$x|$gdata|$gsize<\n";
+    $x = <GCFO>;
+    $x eq "\n" or die "$obj ($_) $!";
+    $count{inspected}++;
     return $gdata;
 }
 
+sub hashobj ($$) {
+    my ($data,$type) = @_;
+    my $gwopid = open2 \*GWO, \*GWI,
+       "git hash-object -t $type --stdin"
+       or die $!;
+    print GWI $data or die $!;
+    close GWI or die $!;
+    $_ = <GWO>;
+    close GWO or die $!;
+    waitpid $gwopid,0 == $gwopid or die $!;
+    die $? if $?;
+    m/^(\w+)\n/ or die "$_ ?";
+    $count{"rewritten $type"}++;
+    return $1;
+}
+
 our %memo;
-our %count;
 
+sub rewrite_commit ($);
 sub rewrite_commit ($) {
     my ($obj) = @_;
     my $m = \ $memo{$obj};
     return $$m if defined $$m;
     my $olddata = getobj $obj, 'commit';
-    die "$obj ?" unless $old;
     $olddata =~ m/(?<=\n)(?=\n)/ or die "$obj ?";
     my $msg = $';
     $_ = $`;
@@ -49,23 +64,13 @@ sub rewrite_commit ($) {
        $_ .= $1;
        $count{fix_import}++;
     }
-    $newdata = $_.$msg;
+    my $newdata = $_.$msg;
     my $newobj;
     if ($newdata eq $olddata) {
-       $newobj = $oldobj;
+       $newobj = $obj;
+       $count{unchanged}++;
     } else {
-       my $gwopid = open2 \*GWO, \*GWI,
-           'git hash-object -t comit --stdin'
-           or die $!;
-       print GWI $newdata or die $!;
-       close GWI or die $!;
-       $_ = <GWO>;
-       close GWO or die $!;
-       waitpid $gwopid,0 == $gwopid or die $!;
-       die $? if $?;
-       m/^(\w+)\n/ or die "$_ ?";
-       $newobj = $1;
-       $count{commits}++;
+       $newobj = hashobj $newdata, 'commit';
     }
     $$m= $newobj;
     return $newobj;
@@ -85,13 +90,23 @@ sub rewrite_tag ($) {
     if ($oldref eq $newref) {
        return $obj;
     }
-    s/^(?<=object )\w+(?=\n)/$newref/m or die "$obj ?";
-    
+    s/^(object )\w+$/ $1.$newref /me or die "$obj ($_) ?";
+    s/^-----BEGIN PGP SIGNATURE-----\n.*^-----END PGP SIGNATURE-----\n$//sm;
+    return hashobj $_, 'tag';
 }
 
+$!=0; $?=0;
+my $refs=`git-for-each-ref`;
+die "$? $!" if $?;
+
+chomp $refs;
+
+our @updates;
+
 foreach my $rline (split /\n/, $refs) {
-    die "$_ ?" unless m/^(\w+)\s+(\w+)\s+(\S.*)/;
-    my ($obj, $type, $refname) = @_;
+    my ($obj, $type, $refname) = 
+       $rline =~ m/^(\w+)\s+(\w+)\s+(\S.*)/
+       or die "$_ ?";
     my $rewrite;
     if ($type eq 'commit') {
        $rewrite = rewrite_commit($obj);
@@ -101,63 +116,8 @@ foreach my $rline (split /\n/, $refs) {
        warn "ref $refname refers to $type\n";
        next;
     }
-    next if $refname eq $rewrite;
+    next if $rewrite = $obj;
     push @updates, [ $refname, $rewrite ];
 }
 
-
-
-if git-symbolic-ref HEAD >/dev/null 2>&1; then
-    refs+=' HEAD'
-
-
-
-my $gfo = `LC_MESSAGES=C git fsck --no-dangling 2>&1`;
-$? == 256 or die "$? $!"
-
-
-
-
- m/^error in commit (\w+):.*invalid format - expected 'committer/;
-
-case `wc -l <$tmp/bad` in
-    0)
-       echo >&2 'nothing bad found - is git-fsck doing as we expect?' ;
-       exit 8 ;;
-    1)
-       read <$tmp/bad bads
-       nots="^$bads^0 ^$bads^1"
-       ;;
-    *)
-       bads="cat $tmp/bad"
-       ;;
-esac
-
-args="$nots"
-
-refs=`git-for-each-ref --format='%(refname)'`
-
-if git-symbolic-ref HEAD >/dev/null 2>&1; then
-    refs+=' HEAD'
-fi
-
-for head in $refs; do
-    exec <$tmp/bad
-    needed=false
-    for bad in $bads; do
-       if git merge-base --is-ancestor $bad $head; then
-           needed=true
-           break
-       fi
-    done 
-    if ! $needed; then continue; fi
-    args+=" $head"
-done
-
-git filter-branch --original dgit-badcommit --commit-filter '
-echo >&2 "FOO $*"
-cat >&2
-echo >&2 ====
-false
-    sed -e '\''1,/^$/ s/^commiter /committer /'\''
-' $args
+print Dumper(\@updates, \%count);