Instrument the lockfile creation failure

[dbsrgits/DBIx-Class.git] / t / lib / DBICTest.pm

diff --git a/t/lib/DBICTest.pm b/t/lib/DBICTest.pm
index 92c16f7..589f82b 100644 (file)
--- a/t/lib/DBICTest.pm
+++ b/t/lib/DBICTest.pm
@@ -5,9 +5,12 @@ use strict;
 use warnings;
 use DBICTest::RunMode;
 use DBICTest::Schema;
-use DBICTest::Util qw/populate_weakregistry assert_empty_weakregistry/;
+use DBICTest::Util::LeakTracer qw/populate_weakregistry assert_empty_weakregistry/;
+use DBICTest::Util 'local_umask';
 use Carp;
 use Path::Class::File ();
+use File::Spec;
+use Fcntl qw/:DEFAULT :flock/;
 
 =head1 NAME
 
@@ -50,14 +53,98 @@ default, unless the no_deploy or no_populate flags are set.
 
 =cut
 
-sub has_custom_dsn {
-    return $ENV{"DBICTEST_DSN"} ? 1:0;
+# some tests are very time sensitive and need to run on their own, without
+# being disturbed by anything else grabbing CPU or disk IO. Hence why everything
+# using DBICTest grabs a shared lock, and the few tests that request a :GlobalLock
+# will ask for an exclusive one and block until they can get it
+our ($global_lock_fh, $global_exclusive_lock);
+sub import {
+    my $self = shift;
+
+    my $tmpdir = DBICTest::RunMode->tmpdir;
+    my $lockpath = $tmpdir->file('.dbictest_global.lock');
+
+    {
+      my $u = local_umask(0); # so that the file opens as 666, and any user can lock
+      sysopen ($global_lock_fh, $lockpath, O_RDWR|O_CREAT) or do {
+        my $err = $!;
+
+        my @x_tests = map { (defined $_) ? ( $_ ? 1 : 0 ) : 'U' } map {(-e, -d, -f, -r, -w, -x, -o)} ($tmpdir, $lockpath);
+
+        die sprintf <<"EOE", $lockpath, $err, scalar $>, scalar $), (stat($tmpdir))[4,5,2], @x_tests;
+Unable to open %s: %s
+Process EUID/EGID: %s / %s
+TmpDir UID/GID:    %s / %s
+TmpDir StatMode:   %o
+TmpDir X-tests:    -e:%s -d:%s -f:%s -r:%s -w:%s -x:%s -o:%s
+TmpFile X-tests:   -e:%s -d:%s -f:%s -r:%s -w:%s -x:%s -o:%s
+EOE
+      };
+    }
+
+    for (@_) {
+        if ($_ eq ':GlobalLock') {
+            flock ($global_lock_fh, LOCK_EX) or die "Unable to lock $lockpath: $!";
+            $global_exclusive_lock = 1;
+        }
+        else {
+            croak "Unknown export $_ requested from $self";
+        }
+    }
+
+    unless ($global_exclusive_lock) {
+        flock ($global_lock_fh, LOCK_SH) or die "Unable to lock $lockpath: $!";
+    }
+}
+
+END {
+    if ($global_lock_fh) {
+        # delay destruction even more
+    }
 }
 
-sub _sqlite_dbfilename {
+{
     my $dir = Path::Class::File->new(__FILE__)->dir->parent->subdir('var');
     $dir->mkpath unless -d "$dir";
-    return $dir->file('DBIxClass.db')->stringify;
+    $dir = "$dir";
+
+    sub _sqlite_dbfilename {
+        my $holder = $ENV{DBICTEST_LOCK_HOLDER} || $$;
+        $holder = $$ if $holder == -1;
+
+        # useful for missing cleanup debugging
+        #if ( $holder == $$) {
+        #  my $x = $0;
+        #  $x =~ s/\//#/g;
+        #  $holder .= "-$x";
+        #}
+
+        return "$dir/DBIxClass-$holder.db";
+    }
+
+    END {
+        _cleanup_dbfile();
+    }
+}
+
+$SIG{INT} = sub { _cleanup_dbfile(); exit 1 };
+
+sub _cleanup_dbfile {
+    # cleanup if this is us
+    if (
+      ! $ENV{DBICTEST_LOCK_HOLDER}
+        or
+      $ENV{DBICTEST_LOCK_HOLDER} == -1
+        or
+      $ENV{DBICTEST_LOCK_HOLDER} == $$
+    ) {
+        my $db_file = _sqlite_dbfilename();
+        unlink $_ for ($db_file, "${db_file}-journal");
+    }
+}
+
+sub has_custom_dsn {
+    return $ENV{"DBICTEST_DSN"} ? 1:0;
 }
 
 sub _sqlite_dbname {
@@ -116,7 +203,7 @@ sub _database {
 }
 
 sub __mk_disconnect_guard {
-  return if DBIx::Class::_ENV_::PEEPEENESS(); # leaks handles, delaying DESTROY, can't work right
+  return if DBIx::Class::_ENV_::PEEPEENESS; # leaks handles, delaying DESTROY, can't work right
 
   my $db_file = shift;
   return unless -f $db_file;