Groundwork for bump triples

The idea is to make it possible to bisect NQP and MoarVM whenever we
hit a bump. Unfortunately this work has never been finished, but
committing it now anyway to get rid of uncommitted files on the
server.

xbin/build.p6

@@ -37,6 +37,10 @@ my \EVERYTHING-RANGE  = ‘2014.01^..HEAD’; # to build everything, but in hist
 
 my \WORKING-DIRECTORY = ‘.’; # TODO not supported yet
 
+my \RAKUDO-NQP-ORIGIN = ‘https://github.com/perl6/nqp.git’;
+my \RAKUDO-NQP-LATEST = “/tmp/whateverable/rakudo-triple-nqp-repo”;
+my \RAKUDO-MOAR-ORIGIN = ‘https://github.com/MoarVM/MoarVM.git’;
+my \RAKUDO-MOAR-LATEST = “/tmp/whateverable/rakudo-triple-moar-repo”;
 my \REPO-ORIGIN       = RAKUDOISH
                         ?? ‘https://github.com/rakudo/rakudo.git’
                         !! ‘https://github.com/MoarVM/MoarVM.git’;
@@ -60,13 +64,19 @@ exit 0 unless run ‘mkdir’, :err(Nil), ‘--’, BUILD-LOCK; # only one insta
 my $locked = True;
 END BUILD-LOCK.IO.rmdir if $locked;
 
-if REPO-LATEST.IO ~~ :d  {
-    my $old-dir = $*CWD;
-    LEAVE chdir $old-dir;
-    chdir REPO-LATEST;
-    run ‘git’, ‘pull’;
-} else {
-    exit unless run ‘git’, ‘clone’, ‘--’, REPO-ORIGIN, REPO-LATEST;
+sub pull-or-clone($repo-origin, $repo-path) {
+    if $repo-path.IO ~~ :d  {
+        my $old-dir = $*CWD;
+        run :cwd($repo-path), ‘git’, ‘pull’;
+    } else {
+        exit unless run ‘git’, ‘clone’, ‘--’, $repo-origin, $repo-path;
+    }
+}
+
+pull-or-clone REPO-ORIGIN, REPO-LATEST;
+if RAKUDOISH {
+    pull-or-clone RAKUDO-NQP-ORIGIN,  RAKUDO-NQP-LATEST;
+    pull-or-clone RAKUDO-MOAR-ORIGIN, RAKUDO-MOAR-LATEST;
 }
 
 if REPO-CURRENT.IO !~~ :d  {
@@ -75,21 +85,61 @@ if REPO-CURRENT.IO !~~ :d  {
 
 my $channel = Channel.new;
 
-my @git-latest  = ‘git’, ‘--git-dir’, “{REPO-LATEST}/.git”, ‘--work-tree’, REPO-LATEST;
-my @args-tags   = |@git-latest, ‘log’, ‘-z’, ‘--pretty=%H’, ‘--tags’, ‘--no-walk’, ‘--since’, TAGS-SINCE;
-my @args-latest = |@git-latest, ‘log’, ‘-z’, ‘--pretty=%H’, COMMIT-RANGE;
-my @args-recent = |@git-latest, ‘log’, ‘-z’, ‘--pretty=%H’, ‘--all’, ‘--since’, ALL-SINCE;
-my @args-old    = |@git-latest, ‘log’, ‘-z’, ‘--pretty=%H’, ‘--reverse’, EVERYTHING-RANGE;
+my @git-log     = ‘git’, ‘log’, ‘-z’, ‘--pretty=%H’;
+my @args-tags   = |@git-log, ‘--tags’, ‘--no-walk’, ‘--since’, TAGS-SINCE;
+my @args-latest = |@git-log, COMMIT-RANGE;
+my @args-recent = |@git-log, ‘--all’, ‘--since’, ALL-SINCE;
+my @args-old    = |@git-log, ‘--reverse’, EVERYTHING-RANGE;
 
 my %commits;
+
+# Normal Rakudo commits
 for @args-tags, @args-latest, @args-recent, @args-old -> @_ {
-    for run(:out, |@_).out.split(0.chr, :skip-empty) {
+    for run(:cwd(REPO-LATEST), :out, |@_).out.split(0.chr, :skip-empty) {
         next if %commits{$_}:exists;
         %commits{$_}++;
         $channel.send: $_
     }
 }
 
+sub get-build-revision($repo, $on-commit, $file) {
+    run(:cwd($repo), :out, ‘git’, ‘show’,
+        “{$on-commit}:tools/build/$file”).out.slurp-rest.trim
+}
+
+# Rakudo-NQP-Moar triples (for bumps)
+#`｢｢｢
+if PROJECT == Rakudo-Moar {
+    my @args-bumps = ‘git’, ‘log’, ‘-z’, ‘--pretty=%x00%H’,
+                     ‘--follow’, ‘--reverse’,
+                     EVERYTHING-RANGE, ‘tools/build/NQP_REVISION’;
+    for run(:cwd(REPO-LATEST), :out, |@args-bumps)
+      .out.split(0.chr, :skip-empty).rotor(2) -> ($rakudo-sha, $diff) {
+        #my $nqp-old = get-build-revision REPO-LATEST, “$rakudo-sha^”, ‘NQP_REVISION’;
+        #my $nqp-new = get-build-revision REPO-LATEST, “$rakudo-sha”,  ‘NQP_REVISION’;
+
+        #say “$rakudo-sha”;
+        for run(:cwd(RAKUDO-NQP-LATEST), :out, |@git-log, “$nqp-old..$nqp-new”)
+          .out.split(0.chr, :skip-empty) -> $nqp-sha {
+            my $moar-sha = get-build-revision RAKUDO-NQP-LATEST, “$nqp-sha”, ‘MOAR_REVISION’;
+            # TODO shas are not shas
+            say “|- $nqp-sha - $moar-sha”;
+        }
+        for run(:cwd(RAKUDO-NQP-LATEST), :out, |@git-log, ‘--follow’, ‘--reverse’,
+                “$nqp-old..$nqp-new”, ‘tools/build/MOAR_REVISION’)
+          .out.split(0.chr, :skip-empty) -> $nqp-sha {
+            my $moar-old = get-build-revision RAKUDO-NQP-LATEST, “$nqp-sha^”, ‘MOAR_REVISION’;
+            my $moar-new = get-build-revision RAKUDO-NQP-LATEST, “$nqp-sha”,  ‘MOAR_REVISION’;
+            for run(:cwd(RAKUDO-MOAR-LATEST), :out, |@git-log, “$moar-old..$moar-new”)
+              .out.split(0.chr, :skip-empty) -> $moar-sha {
+                say “   |- $moar-sha”;
+            }
+        }
+    }
+}
+# ｣｣｣
+
+
 await (for ^PARALLEL-COUNT { # TODO rewrite when .race starts working in rakudo
               start loop {
                   my $commit = $channel.poll;