X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?p=topbloke.git;a=blobdiff_plain;f=topbloke-merge-lists;h=ef87b13b01f070f287ba30e4455e21abe26bd7a3;hp=42737e0e1199ef0db7bb6374eb7e8e4702d1bd84;hb=3e8d721402b8e907a2658ef86ce9c05756f85c56;hpb=89cc7b48d4486441fcd6f589b5e344993b522fe7

diff --git a/topbloke-merge-lists b/topbloke-merge-lists
index 42737e0..ef87b13 100755
--- a/topbloke-merge-lists
+++ b/topbloke-merge-lists
@@ -5,16 +5,30 @@ use warnings;
 use IO::Handle;
 
 our %flag;
-our @order, @order_final_maybe;
+our (@order, @order_final_maybe);
+our $verbose=0;
+our $propsmode=0;
+our $marker=5;
+
+# we don't use Getopt::Long because we want to be quick to start up
+# and we're not really a very user-facing utility
 
 while (@ARGV && $ARGV[0] =~ m/^\-/) {
     $_ = shift @ARGV;
     if (s/^-U//) {
-	$flag{$_}{Result} = 0;
+	$flag{$_}{ForceResult} = 1;
+	$flag{$_}{Result} = undef;
 	push @order_final_maybe, $_;
     } elsif (s/^-D//) {
-	$flag{$_}{Result} = 1;
+	$flag{$_}{ForceResult} = 1;
+	$flag{$_}{Result} = '';
 	push @order_final_maybe, $_;
+    } elsif (m/^-v$/) {
+	$verbose = 1;
+    } elsif (m/^-P$/) {
+	$propsmode = 1;
+    } elsif (m/^-M(\d+)$/) {
+	$marker = $1;
     } elsif (m/^--$/) {
 	last;
     } else {
@@ -28,38 +42,71 @@ foreach my $ix (qw(0 1 2)) {
     open F, '<', $ARGV[$ix] or die "$ix $!";
     while (<F>) {
 	chomp or die;
-	$flag{$_}{Input}[$ix] = 1;
-	my $ff = $flag{$_};
-	push @order, $_ unless $ff->{InOrder}++;
+	($propsmode && m/ /) or m/$/;
+	$flag{$`}{Input}[$ix] = $'; #';
+	push @order, $` unless $flag{$`}{InOrder}++;
     }
     F->error and die $!;
     close F or die $!;
 }
 
 foreach $_ (@order_final_maybe) {
-    push @order, $_ unless $flags{$_}{InOrder}++;
+    push @order, $_ unless $flag{$_}{InOrder}++;
 }
 
+my $current = $ARGV[0];
+
 open O, '>', "$current.tmp" or die "$current.tmp $!";
 
-foreach $_ (@order) {
-    my $ff = $flag{$_};
-    if (!defined $ff->{Result}) {
-	my $s = '';
-	foreach my $ix (qw(0 1 2)) {
-	    $ff->{Input}[$ix] ||= 1;
-	    $s .= $ff->{Input}[$ix];
+sub prmark ($) { 
+    print O $_[0] x $marker, "\n" or die $!;
+ }
+sub prval ($) {
+    my $v = @_;
+    print O $v,"\n" or die $! if defined $v;
+}
+
+our $f;
+
+if ($verbose) {
+    sub verb ($) { print STDERR "MERGE_LISTS $f @_\n" or die $!; }
+} else {
+    sub verb { }
+}
+
+our $conflicts = 0;
+
+foreach $f (@order) {
+    my $ff = $flag{$f};
+    verb("BEGIN");
+    if (defined $ff->{ForceResult}) {
+	verb("FORCE");
+    } else {
+	my @in = @{ $ff->{Input} };
+	verb(defined ? "DEF $_": "U") foreach @in;
+	if (iseq($in[0], $in[2])) {
+	    verb("SAME");
+	    $ff->{Result} = [0];
+	} elsif (iseq($in[0], $in[1])) {
+	    verb("THEIRS");
+	    $ff->{Result} = $in[2];
+	} elsif (iseq($in[2], $in[1])) {
+	    verb("OURS");
+	    $ff->{Result} = $in[0];
+	} else {
+	    $conflicts++;
+	    verb("CONFLICT");
+	    prmark('<');
+	    prval($in[0]);
+	    prmark('=');
+	    prval($in[2]);
+	    prmark('>');
+	    next;
 	}
-	$ff->{Result} =
-	    $s eq '000' ? '000' :
-	    $s eq '111' ? '111' :
-	    $ff->{Input}[1];
-    }
-    if ($ff->{Result}) {
-	print O "$_\n" or die $!;
     }
+    prval($ff->{Result});
 }
 
 close O or die $!;
 rename "$current.tmp", "$current" or die "$current $!";
-exit 0;
+exit $conficts ? 1 :0;