dgit: Provide "dgit setup-mergechangelogs" operation

[dgit.git] / dgit

diff --git a/dgit b/dgit
index 802d791fb7504af58a152b3c73d1787df37aa2ba..3ef43485ffe088b1ef5cc7bf87e990de143d8a24 100755 (executable)
--- a/dgit
+++ b/dgit
@@ -1481,6 +1481,33 @@ sub set_local_git_config ($$) {
     runcmd @git, qw(config), $k, $v;
 }
 
+sub setup_mergechangelogs () {
+    my $driver = 'dpkg-mergechangelogs';
+    my $cb = "merge.$driver";
+    my $attrs = '.git/info/attributes';
+    ensuredir '.git/info';
+
+    open NATTRS, ">", "$attrs.new" or die "$attrs.new $!";
+    if (!open ATTRS, "<", $attrs) {
+       $!==ENOENT or die "$attrs: $!";
+    } else {
+       while (<ATTRS>) {
+           chomp;
+           next if m{^debian/changelog\s};
+           print NATTRS $_, "\n" or die $!;
+       }
+       ATTRS->error and die $!;
+       close ATTRS;
+    }
+    print NATTRS "debian/changelog merge=$driver\n" or die $!;
+    close NATTRS;
+
+    set_local_git_config "$cb.name", 'debian/changelog merge driver';
+    set_local_git_config "$cb.driver", 'dpkg-mergechangelogs -m %O %A %B %A';
+
+    rename "$attrs.new", "$attrs" or die "$attrs: $!";
+}
+
 sub clone ($) {
     my ($dstdir) = @_;
     canonicalise_suite();
@@ -1510,6 +1537,7 @@ sub clone ($) {
        $vcsgiturl =~ s/\s+-b\s+\S+//g;
        runcmd @git, qw(remote add vcs-git), $vcsgiturl;
     }
+    setup_mergechangelogs();
     runcmd @git, qw(reset --hard), lrref();
     printdone "ready for work in $dstdir";
 }
@@ -2774,6 +2802,11 @@ sub cmd_clone_dgit_repos_server {
     exec @cmd or fail "exec git clone: $!\n";
 }
 
+sub cmd_setup_mergechangelogs {
+    badusage "no arguments allowed to dgit setup-mergechangelogs" if @ARGV;
+    setup_mergechangelogs();
+}
+
 #---------- argument parsing and main program ----------
 
 sub cmd_version {