Remove dir_test hack and add a way for vcs tests to run perl code, using this for...

[code/myrepos.git] / mr

diff --git a/mr b/mr
index 23178a5c2bb03e3528aceae6f366fcdeb8f8eb1c..262fab59519a63a20f4700271ccb455d74fc6acf 100755 (executable)
--- a/mr
+++ b/mr
@@ -467,13 +467,6 @@ can be constructed accumulatively.
 The name of the version control system is itself determined by
 running each defined "VCS_test" action, until one succeeds.
 
-=item VCS_dir_test
-
-This is a more optimised way to test for the version control system.
-Each "VCS_dir_test" action is run once, and can output lines consisting
-of the name of a VCS, and a directory to look for in the top of a repo
-to detect that VCS.
-
 =back
 
 =head1 UNTRUSTED MRCONFIG FILES
@@ -594,17 +587,22 @@ sub runsh {
        $runner->($shellcode);
 }
 
-sub runshpipe {
-       runsh @_, sub {
-               my $sh=shift;
-               my $ret=`$sh`;
-               chomp $ret;
-               return $ret;
-       };
+my %perl_cache;
+sub perl {
+       my $id=shift;
+       my $s=shift;
+       if ($s =~ m/^perl:\s+(.*)/s) {
+               return $perl_cache{$1} if exists $perl_cache{$1};
+               my $sub=eval "sub {$1}";
+               if (! defined $sub) {
+                       print STDERR "mr: bad perl code in $id: $@\n";
+               }
+               return $perl_cache{$1} = $sub;
+       }
+       return undef;
 }
 
 my %vcs;
-my %vcs_dir_test;
 sub vcs_test {
        my ($action, $dir, $topdir, $subdir) = @_;
 
@@ -613,53 +611,46 @@ sub vcs_test {
        }
 
        my $test="";
-       my $dir_test="";
+       my %perltest;
        foreach my $vcs_test (
                        sort {
                                length $a <=> length $b 
                                          ||
                                       $a cmp $b
                        } grep { /_test$/ } keys %{$config{$topdir}{$subdir}}) {
-               if ($vcs_test =~ /(.*)_dir_test/) {
-                       my $vcs=$1;
-                       if (! defined $vcs_dir_test{$vcs}) {
-                               $dir_test.=$config{$topdir}{$subdir}{$vcs_test}."\n";
-                       }
-                       next;
-               }
                my ($vcs)=$vcs_test =~ /(.*)_test/;
-               $test="my_$vcs_test() {\n$config{$topdir}{$subdir}{$vcs_test}\n}\n".$test;
-               $test.="if my_$vcs_test; then echo $vcs; fi\n";
-       }
-
-       if (length $dir_test) {
-               runsh "vcs dir test", $topdir, $subdir, $dir_test, [], sub {
-                       my $sh=shift;
-                       foreach my $line (`$sh`) {
-                               chomp $line;
-                               my ($vcs, $dir)=split(" ", $line);
-                               $vcs_dir_test{$vcs}=$dir;
-                       }
+               my $p=perl($vcs_test, $config{$topdir}{$subdir}{$vcs_test});
+               if (defined $p) {
+                       $perltest{$vcs}=$p;
+               }
+               else {
+                       $test="my_$vcs_test() {\n$config{$topdir}{$subdir}{$vcs_test}\n}\n".$test;
+                       $test.="if my_$vcs_test; then echo $vcs; fi\n";
                }
        }
 
-       foreach my $vcs (keys %vcs_dir_test) {
-               if (-d "$ENV{MR_REPO}/$vcs_dir_test{$vcs}") {
-                       return $vcs{$dir}=$vcs;
+       my @vcs;
+       foreach my $vcs (keys %perltest) {
+               if ($perltest{$vcs}->()) {
+                       push @vcs, $vcs;
                }
        }
 
-       my $vcs=runshpipe "vcs test", $topdir, $subdir, $test, [];
-       if ($vcs=~/\n/s) {
-               $vcs=~s/\n/, /g;
-               print STDERR "mr $action: found multiple possible repository types ($vcs) for ".fulldir($topdir, $subdir)."\n";
+       push @vcs, split(/\n/,
+               runsh("vcs test", $topdir, $subdir, $test, [], sub {
+                       my $sh=shift;
+                       my $ret=`$sh`;
+                       return $ret;
+               })) if length $test;
+       if (@vcs > 1) {
+               print STDERR "mr $action: found multiple possible repository types (@vcs) for ".fulldir($topdir, $subdir)."\n";
                return undef;
        }
-       if (! length $vcs) {
+       if (! @vcs) {
                return $vcs{$dir}=undef;
        }
        else {
-               return $vcs{$dir}=$vcs;
+               return $vcs{$dir}=$vcs[0];
        }
 }
        
@@ -1867,17 +1858,17 @@ lib =
                fi
        }
 
-svn_dir_test = echo svn .svn
-git_dir_test = echo git .git
-bzr_dir_test = echo bzr .bzr
-cvs_dir_test = echo cvs CVS
-hg_dir_test  = echo hg .hg
-darcs_dir_test = echo darcs _darcs
-fossil_test = test -f "$MR_REPO"/_FOSSIL_
-git_bare_test =
-       test -d "$MR_REPO"/refs/heads && test -d "$MR_REPO"/refs/tags &&
-       test -d "$MR_REPO"/objects && test -f "$MR_REPO"/config &&
-       test "`GIT_CONFIG="$MR_REPO"/config git config --get core.bare`" = true
+svn_test = perl: -d "$ENV{MR_REPO}/.svn"
+git_test = perl: -d "$ENV{MR_REPO}/.git"
+bzr_test = perl: -d "$ENV{MR_REPO}/.bzr"
+cvs_test = perl: -d "$ENV{MR_REPO}/CVS"
+hg_test  = perl: -d "$ENV{MR_REPO}/.hg"
+darcs_test = perl: -d "$ENV{MR_REPO}/_darcs"
+fossil_test = perl: -f "$ENV{MR_REPO}/_FOSSIL_"
+git_bare_test = perl: 
+       -d "$ENV{MR_REPO}/refs/heads" && -d "$ENV{MR_REPO}/refs/tags" &&
+       -d "$ENV{MR_REPO}/objects" && -f "$ENV{MR_REPO}/config" &&
+       `GIT_CONFIG="$ENV{MR_REPO}"/config git config --get core.bare` =~ /true/
 
 svn_update = svn update "$@"
 git_update = git pull "$@"