Enable CircleCI

The configuration for the build is in the YAML file; the changes to the
regression runner are backward-compatible with Travis and just add the
logic to detect whether our custom (isolation- and vanilla-enabled) pkg
is present.

.circleci/config.yml

@@ -0,0 +1,81 @@
+version: 2.0
+
+jobs:
+  build:
+    docker:
+      - {image: 'citusdata/extbuilder:latest'}
+    steps:
+      - checkout
+      - {run: {name: 'Configure, Build, and Install', command: build-ext}}
+      - {persist_to_workspace: {root: ., paths: [.]}}
+  test-10_check-multi:
+    docker:
+      - {image: 'citusdata/exttester-10:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-multi)', command: 'install-and-test-ext check-multi'}}
+  test-10_check-tt-van-mx:
+    docker:
+      - {image: 'citusdata/exttester-10:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-tt-van-mx)', command: 'install-and-test-ext check-multi-task-tracker-extra check-vanilla check-multi-mx'}}
+  test-10_check-iso-work-fol:
+    docker:
+      - {image: 'citusdata/exttester-10:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-iso-work-fol)', command: 'install-and-test-ext check-isolation check-worker check-follower-cluster'}}
+  test-10_check-failure:
+    docker:
+      - {image: 'citusdata/failtester-10:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-failure)', command: 'install-and-test-ext check-failure'}}
+  test-11_check-multi:
+    docker:
+      - {image: 'citusdata/exttester-11:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-multi)', command: 'install-and-test-ext check-multi'}}
+  test-11_check-tt-van-mx:
+    docker:
+      - {image: 'citusdata/exttester-11:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-tt-van-mx)', command: 'install-and-test-ext check-multi-task-tracker-extra check-vanilla check-multi-mx'}}
+  test-11_check-iso-work-fol:
+    docker:
+      - {image: 'citusdata/exttester-11:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-iso-work-fol)', command: 'install-and-test-ext check-isolation check-worker check-follower-cluster'}}
+  test-11_check-failure:
+    docker:
+      - {image: 'citusdata/failtester-11:latest'}
+    working_directory: /home/circleci/project
+    steps:
+      - {attach_workspace: {at: .}}
+      - {run: {name: 'Install and Test (check-failure)', command: 'install-and-test-ext check-failure'}}
+workflows:
+  version: 2
+  build_and_test:
+    jobs:
+      - build
+
+      - {test-10_check-multi: {requires: [build]}}
+      - {test-10_check-tt-van-mx: {requires: [build]}}
+      - {test-10_check-iso-work-fol: {requires: [build]}}
+      - {test-10_check-failure: {requires: [build]}}
+
+      - {test-11_check-multi: {requires: [build]}}
+      - {test-11_check-tt-van-mx: {requires: [build]}}
+      - {test-11_check-iso-work-fol: {requires: [build]}}
+      - {test-11_check-failure: {requires: [build]}}

src/test/regress/pg_regress_multi.pl

@@ -16,6 +16,7 @@ use warnings;
 
 use Fcntl;
 use Getopt::Long;
+use File::Basename;
 use File::Spec::Functions;
 use File::Path qw(make_path remove_tree);
 use Config;
@@ -151,6 +152,11 @@ else
 	$plainRegress = "$pgxsdir/src/test/regress/pg_regress";
 	$isolationRegress = "${postgresBuilddir}/src/test/isolation/pg_isolation_regress";
 	$pgConfig = "$bindir/pg_config";
+
+	if (-x "$pgxsdir/src/test/isolation/pg_isolation_regress")
+	{
+		$isolationRegress = "$pgxsdir/src/test/isolation/pg_isolation_regress";
+	}
 }
 
 if ($isolationtester && ! -f "$isolationRegress")
@@ -171,7 +177,9 @@ MESSAGE
 }
 
 my $vanillaRegress = catfile("${postgresBuilddir}", "src", "test", "regress", "pg_regress");
-if ($vanillatest && ! -f "$vanillaRegress")
+my $vanillaSchedule = catfile(dirname("${pgxsdir}"), "regress", "parallel_schedule");
+
+if ($vanillatest && ! (-f "$vanillaRegress" or -f "$vanillaSchedule"))
 {
     die <<"MESSAGE";
 
@@ -796,8 +804,21 @@ if ($vanillatest)
     $ENV{PGPORT} = $masterPort;
     $ENV{PGUSER} = $user;
 
+	if (-f "$vanillaSchedule")
+	{
+	    rmdir "./testtablespace";
+	    mkdir "./testtablespace";
+
+	    my $pgregressdir=catfile(dirname("$pgxsdir"), "regress");
+	    system("$plainRegress", ("--inputdir",  $pgregressdir),
+	           ("--schedule",  catfile("$pgregressdir", "parallel_schedule"))) == 0
+		or die "Could not run vanilla tests";
+	}
+	else
+	{
 	    system("make", ("-C", catfile("$postgresBuilddir", "src", "test", "regress"), "installcheck-parallel")) == 0
 		or die "Could not run vanilla tests";
+	}
 }
 elsif ($isolationtester)
 {