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authorJohn Ankarstrom <john@ankarstrom.se>2021-07-03 21:27:05 +0200
committerJohn Ankarstrom <john@ankarstrom.se>2021-07-03 21:56:58 +0200
commit2f78c9a8bd17140b63114a844fa9c23e22489d80 (patch)
tree1b31a2f6f92491a203c54b2143bd4affc5f4c7e8 /git-bdiff
parentf26c6cf48e6c9e89909b4abb1dcf81cc2f39a86b (diff)
downloadxutil-2f78c9a8bd17140b63114a844fa9c23e22489d80.tar.gz
Add 'git-bdiff' utility
Diffstat (limited to 'git-bdiff')
-rwxr-xr-xgit-bdiff51
1 files changed, 51 insertions, 0 deletions
diff --git a/git-bdiff b/git-bdiff
new file mode 100755
index 0000000..9b39ad4
--- /dev/null
+++ b/git-bdiff
@@ -0,0 +1,51 @@
+#!/usr/bin/perl
+
+# git-bdiff -- fake compare binary files
+
+use strict;
+use warnings;
+
+my $i;
+
+if (@ARGV == 1) {
+ $i = 0;
+} elsif (@ARGV == 7) {
+ $i = 4;
+} else {
+ die <<USAGE
+usage: $0 file
+ or $0 a t A s b B S
+USAGE
+}
+
+my @deps;
+(my $path = $ARGV[$i]) =~ s,[^/]*$,,;
+(my $target = $ARGV[$i]) =~ s,.*/,,;
+(my $ext = $target) =~ s/.*\.//;
+(my $basename = $target) =~ s/\.[^.]*$//;
+chomp(my $repo = `git rev-parse --show-toplevel`);
+
+open my $f, '<', "$repo/${path}Makefile"
+ or die "could not open $repo/${path}Makefile: $!\n";
+while (<$f>) {
+ # explicit
+ if (/^\Q$target\E:\s*(.*)/) {
+ push @deps, "$repo/$path$_" for split /\s/, $1;
+ last;
+ }
+ # implicit
+ if (/^\.([^ .]+)\.\Q$ext\E\s*:\s*(.*)/) {
+ push @deps, "$repo/$path$basename.$1";
+ push @deps, "$repo/$path$_" for split /\s/, $2;
+ last;
+ }
+}
+close $f;
+die "no dependencies found, cannot compare\n" if not @deps;
+
+$i = 0;
+for (`git diff HEAD -- @deps`) {
+ print if @ARGV == 7;
+ $i = 1;
+}
+exit $i if @ARGV == 1;