From 8d864ed54920937fcb61819376dcc94e8705f5c2 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 19 Jan 2017 20:21:43 -0800
Subject: [PATCH 01/45] Add script/elm.rb

---
 lib/travis/build/script/elm.rb | 110 +++++++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 lib/travis/build/script/elm.rb

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
new file mode 100644
index 0000000000..bd889bd9cd
--- /dev/null
+++ b/lib/travis/build/script/elm.rb
@@ -0,0 +1,110 @@
+module Travis
+  module Build
+    class Script
+      class Elm < Script
+        DEFAULTS = {
+          elm_version: 'latest',
+          elm_test_version: 'latest'
+        }
+
+        def export
+          super
+          sh.export 'TRAVIS_ELM_VERSION', elm_version, echo: false
+          sh.export 'TRAVIS_ELM_TEST_VERSION', elm_test_version, echo: false
+        end
+
+        def configure
+          super
+
+          sh.if '! -d sysconfcpus/bin' do
+            install_sysconfcpus
+          end
+        end
+
+        def announce
+          super
+          sh.echo 'elm version:'
+          sh.cmd 'elm --version'
+
+          sh.echo 'elm-test version:'
+          sh.cmd 'elm-test --version'
+        end
+
+        def setup
+          super
+
+          install_elm
+          install_elm_test
+        end
+
+        def script
+          sh.cmd 'elm-test'
+        end
+
+        def setup_cache
+          if data.cache?(:elm)
+            sh.fold 'cache.elm' do
+              directory_cache.add '$HOME/.cache/elm-stuff', 'elm-stuff'
+
+              # some put their tests in ./test and others use ./tests
+              directory_cache.add '$HOME/.cache/elm-test-stuff', 'test/elm-stuff'
+              directory_cache.add '$HOME/.cache/elm-tests-stuff', 'tests/elm-stuff'
+
+              # we build sysconfcpus from source, so cache the result
+              directory_cache.add '$HOME/.cache/sysconfcpus-cache', 'sysconfcpus'
+            end
+          end
+        end
+
+        def cache_slug
+          super << '--elm-' << elm_version
+        end
+
+        private
+
+          def elm_version
+            config[:elm_version].to_s
+          end
+
+          def elm_test_version
+            config[:elm_test_version].to_s
+          end
+
+          def install_elm
+            sh.cmd 'npm install -g elm@#{elm_version}', retry: true
+
+            convert_binary_to_sysconfcpus 'elm'
+            convert_binary_to_sysconfcpus 'elm-make'
+            convert_binary_to_sysconfcpus 'elm-package'
+          end
+
+          def install_elm_test
+            sh.cmd 'npm install -g elm-test@#{elm_test_version}', retry: true
+
+            convert_binary_to_sysconfcpus 'elm-test'
+          end
+
+          def convert_binary_to_sysconfcpus(binary_name)
+            # Wrap the binary in a call to sysconfcpus -n 2
+            # to work around https://github.com/travis-ci/travis-ci/issues/6656
+            sh.mv "$(npm config get prefix)/bin/#{binary_name}", "$(npm config get prefix)/bin/#{binary_name}-old"
+
+            # Use printf instead of echo here.
+            # see https://github.com/rtfeldman/node-elm-compiler/pull/50
+            sh.cmd ('printf "#\041/bin/bash\n\necho \"Running ' + binary_name + ' with sysconfcpus -n 2\"\n\n$TRAVIS_BUILD_DIR/sysconfcpus/bin/sysconfcpus -n 2 ' + binary_name + '-old \"\$@\"" > $(npm config get prefix)/bin/' + binary_name)
+            sh.chmod '+x', "$(npm config get prefix)/bin/#{binary_name}"
+          end
+
+          def install_sysconfcpus
+            # this is a prerequisite for the convert_binary_to_sysconfcpus method
+            # which provides an epic build time improvement - see https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142
+            sh.cmd 'git clone https://github.com/obmarg/libsysconfcpus.git', retry: true
+            sh.cd 'libsysconfcpus'
+            sh.cmd './configure --prefix=$TRAVIS_BUILD_DIR/sysconfcpus'
+            sh.cmd 'make && make install'
+            sh.cd '..'
+          end
+      end
+    end
+  end
+end

From bf9d28de90513264405a0135085ab722d3bac4d6 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 19 Jan 2017 20:21:51 -0800
Subject: [PATCH 02/45] Add elm to build processes.

---
 lib/travis/build.rb                      | 2 ++
 lib/travis/build/addons/deploy/script.rb | 1 +
 lib/travis/build/script.rb               | 1 +
 3 files changed, 4 insertions(+)

diff --git a/lib/travis/build.rb b/lib/travis/build.rb
index a06187d890..9182def87d 100644
--- a/lib/travis/build.rb
+++ b/lib/travis/build.rb
@@ -38,6 +38,8 @@ def by_lang(lang)
           Script::ObjectiveC
         when 'bash', 'sh', 'shell' then
           Script::Generic
+        when 'elm' then
+          Script::Elm
         else
           name = lang.split('_').map { |w| w.capitalize }.join
           Script.const_get(name, false) rescue Script::Ruby
diff --git a/lib/travis/build/addons/deploy/script.rb b/lib/travis/build/addons/deploy/script.rb
index 039f7ef7b8..98e1a64f29 100644
--- a/lib/travis/build/addons/deploy/script.rb
+++ b/lib/travis/build/addons/deploy/script.rb
@@ -9,6 +9,7 @@ class Script
           VERSIONED_RUNTIMES = %w(
             d
             dart
+            elm
             elixir
             ghc
             go
diff --git a/lib/travis/build/script.rb b/lib/travis/build/script.rb
index 4f4347e334..5343eae800 100644
--- a/lib/travis/build/script.rb
+++ b/lib/travis/build/script.rb
@@ -18,6 +18,7 @@
 require 'travis/build/script/csharp'
 require 'travis/build/script/d'
 require 'travis/build/script/dart'
+require 'travis/build/script/elm'
 require 'travis/build/script/erlang'
 require 'travis/build/script/elixir'
 require 'travis/build/script/go'

From c8456af39f8b43d5c154c34c94006ef8b7db2257 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 19 Jan 2017 21:01:47 -0800
Subject: [PATCH 03/45] Add elm_spec.rb

---
 spec/build/script/elm_spec.rb | 39 +++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 spec/build/script/elm_spec.rb

diff --git a/spec/build/script/elm_spec.rb b/spec/build/script/elm_spec.rb
new file mode 100644
index 0000000000..296a11ce08
--- /dev/null
+++ b/spec/build/script/elm_spec.rb
@@ -0,0 +1,39 @@
+require 'spec_helper'
+
+describe Travis::Build::Script::Elm, :sexp do
+  let(:data)   { payload_for(:push, :elm) }
+  let(:script) { described_class.new(data) }
+  subject      { script.sexp }
+  it           { store_example }
+
+  it_behaves_like 'compiled script' do
+    let(:code) { ['TRAVIS_LANGUAGE=elm'] }
+    let(:cmds) { ['elm-test'] }
+  end
+
+  it_behaves_like 'a build script sexp'
+
+  it 'sets TRAVIS_ELM_VERSION' do
+    should include_sexp [:export, ['TRAVIS_ELM_VERSION', 'latest']]
+  end
+
+  it 'sets TRAVIS_ELM_TEST_VERSION' do
+    should include_sexp [:export, ['TRAVIS_ELM_TEST_VERSION', 'latest']]
+  end
+
+  it 'announces elm version' do
+    should include_sexp [:cmd, 'elm --version', echo: true]
+    should include_sexp [:cmd, 'elm-test --version', echo: true]
+  end
+
+  describe 'script' do
+    it 'runs "elm-test"' do
+      should include_sexp [:cmd, 'elm-test', echo: true, timing: true]
+    end
+  end
+
+  describe '#cache_slug' do
+    subject { described_class.new(data).cache_slug }
+    it { is_expected.to eq("cache-#{CACHE_SLUG_EXTRAS}--elm-latest") }
+  end
+end

From 889e7aaa6234581c9df34bfbbc1bb7c9ea330a9f Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Sun, 5 Feb 2017 22:10:28 -0800
Subject: [PATCH 04/45] Switch to using elm-use so we get elm-format as well.

---
 lib/travis/build/script/elm.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index bd889bd9cd..b6405fccaf 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -71,11 +71,13 @@ def elm_test_version
           end
 
           def install_elm
-            sh.cmd 'npm install -g elm@#{elm_version}', retry: true
+            sh.cmd 'npm install -g elm-use@1.1.0', retry: true
+            sh.cmd 'elm-use #{elm_version}', retry: true
 
             convert_binary_to_sysconfcpus 'elm'
             convert_binary_to_sysconfcpus 'elm-make'
             convert_binary_to_sysconfcpus 'elm-package'
+            convert_binary_to_sysconfcpus 'elm-format'
           end
 
           def install_elm_test

From e55e6b59506cae1ec0cc72765e9ad3a7e6e8eb5a Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 7 Feb 2017 22:26:09 -0800
Subject: [PATCH 05/45] Validate elm-format before running tests.

---
 lib/travis/build/script/elm.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index b6405fccaf..6868323273 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -38,6 +38,7 @@ def setup
         end
 
         def script
+          sh.cmd 'elm-format --validate .'
           sh.cmd 'elm-test'
         end
 

From e9d6f6ddd42f1fd6da9f90528306549f6acd8b5a Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Wed, 1 Mar 2017 16:05:24 -0800
Subject: [PATCH 06/45] Specify elm-use version bounds

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 6868323273..b425b9cd58 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -72,7 +72,7 @@ def elm_test_version
           end
 
           def install_elm
-            sh.cmd 'npm install -g elm-use@1.1.0', retry: true
+            sh.cmd 'npm install -g elm-use@">=1.1.0 <2.0.0"', retry: true
             sh.cmd 'elm-use #{elm_version}', retry: true
 
             convert_binary_to_sysconfcpus 'elm'

From 59f0e85ab4b2e523924f0485106f830af52ca6ac Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 11:27:16 -0800
Subject: [PATCH 07/45] Use NodeJs base class

---
 lib/travis/build/script/elm.rb | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index b425b9cd58..a64ea97323 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -1,7 +1,7 @@
 module Travis
   module Build
     class Script
-      class Elm < Script
+      class Elm < NodeJs
         DEFAULTS = {
           elm_version: 'latest',
           elm_test_version: 'latest'
@@ -72,7 +72,7 @@ def elm_test_version
           end
 
           def install_elm
-            sh.cmd 'npm install -g elm-use@">=1.1.0 <2.0.0"', retry: true
+            npm_install '-g elm-use@">=1.1.0 <2.0.0"'
             sh.cmd 'elm-use #{elm_version}', retry: true
 
             convert_binary_to_sysconfcpus 'elm'
@@ -82,7 +82,7 @@ def install_elm
           end
 
           def install_elm_test
-            sh.cmd 'npm install -g elm-test@#{elm_test_version}', retry: true
+            npm_install '-g elm-test@#{elm_test_version}'
 
             convert_binary_to_sysconfcpus 'elm-test'
           end

From bbd0617d32d347b0c49f952afd0fda51ad31ea81 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 11:27:28 -0800
Subject: [PATCH 08/45] Add .nvmrc to set default Node version

---
 .nvmrc | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .nvmrc

diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000000..cf79bf90ee
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+6.10.0

From dcb800b87a1325e10de763bfc794c250c03e016f Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 11:57:17 -0800
Subject: [PATCH 09/45] Fully qualify NodeJs

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index a64ea97323..1724ab521c 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -1,7 +1,7 @@
 module Travis
   module Build
     class Script
-      class Elm < NodeJs
+      class Elm < Travis::Build::Script::NodeJs
         DEFAULTS = {
           elm_version: 'latest',
           elm_test_version: 'latest'

From acc4839fbeff99184806b88047b321504f51e452 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 15:01:22 -0800
Subject: [PATCH 10/45] Don't use .nvmrc

---
 .nvmrc | 1 -
 1 file changed, 1 deletion(-)
 delete mode 100644 .nvmrc

diff --git a/.nvmrc b/.nvmrc
deleted file mode 100644
index cf79bf90ee..0000000000
--- a/.nvmrc
+++ /dev/null
@@ -1 +0,0 @@
-6.10.0

From 419515f2f51b1144681dcdaae9df0af3c155f92e Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 15:01:32 -0800
Subject: [PATCH 11/45] Add require node_js

---
 lib/travis/build/script/elm.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 1724ab521c..38039299f9 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -1,3 +1,5 @@
+require 'node_js'
+
 module Travis
   module Build
     class Script

From 4a51a9481d4f837204149ce7077d7d6171397790 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 15:01:39 -0800
Subject: [PATCH 12/45] Use echo: true instead of sh.echo

---
 lib/travis/build/script/elm.rb | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 38039299f9..cea6500bfe 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -25,11 +25,8 @@ def configure
 
         def announce
           super
-          sh.echo 'elm version:'
-          sh.cmd 'elm --version'
-
-          sh.echo 'elm-test version:'
-          sh.cmd 'elm-test --version'
+          sh.cmd 'elm --version', echo: true
+          sh.cmd 'elm-test --version', echo: true
         end
 
         def setup

From 9f3c387b64cb32341a05aab3b688fb2a40cebaeb Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 15:02:28 -0800
Subject: [PATCH 13/45] Shorten to just NodeJs

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index cea6500bfe..414f53e139 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -3,7 +3,7 @@
 module Travis
   module Build
     class Script
-      class Elm < Travis::Build::Script::NodeJs
+      class Elm < NodeJs
         DEFAULTS = {
           elm_version: 'latest',
           elm_test_version: 'latest'

From 0a653d9f89cf6596489fe0cd8f39b009196b4d69 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 21:48:47 -0800
Subject: [PATCH 14/45] Fix requires

---
 lib/travis/build/script.rb     | 2 +-
 lib/travis/build/script/elm.rb | 2 --
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/travis/build/script.rb b/lib/travis/build/script.rb
index 5343eae800..bf63127e26 100644
--- a/lib/travis/build/script.rb
+++ b/lib/travis/build/script.rb
@@ -18,7 +18,6 @@
 require 'travis/build/script/csharp'
 require 'travis/build/script/d'
 require 'travis/build/script/dart'
-require 'travis/build/script/elm'
 require 'travis/build/script/erlang'
 require 'travis/build/script/elixir'
 require 'travis/build/script/go'
@@ -29,6 +28,7 @@
 require 'travis/build/script/julia'
 require 'travis/build/script/nix'
 require 'travis/build/script/node_js'
+require 'travis/build/script/elm'
 require 'travis/build/script/objective_c'
 require 'travis/build/script/perl'
 require 'travis/build/script/perl6'
diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 414f53e139..9fb787a4ed 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -1,5 +1,3 @@
-require 'node_js'
-
 module Travis
   module Build
     class Script

From 0e692ef34d7a485523f63cfde78be4b4144da2c0 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 2 Mar 2017 21:53:21 -0800
Subject: [PATCH 15/45] Update cache slug and fix test.

---
 lib/travis/build/script/elm.rb | 2 +-
 spec/build/script/elm_spec.rb  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 9fb787a4ed..71be2393dc 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -55,7 +55,7 @@ def setup_cache
         end
 
         def cache_slug
-          super << '--elm-' << elm_version
+          super << '-elm-' << elm_version
         end
 
         private
diff --git a/spec/build/script/elm_spec.rb b/spec/build/script/elm_spec.rb
index 296a11ce08..0a44a5a542 100644
--- a/spec/build/script/elm_spec.rb
+++ b/spec/build/script/elm_spec.rb
@@ -34,6 +34,6 @@
 
   describe '#cache_slug' do
     subject { described_class.new(data).cache_slug }
-    it { is_expected.to eq("cache-#{CACHE_SLUG_EXTRAS}--elm-latest") }
+    it { is_expected.to eq("cache-#{CACHE_SLUG_EXTRAS}--node--elm-latest") }
   end
 end

From ca0e387ddcc0fd66816dda56caaaf543e33bf849 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Fri, 3 Mar 2017 06:17:11 -0800
Subject: [PATCH 16/45] Install Node 6.10.0 by default.

---
 lib/travis/build/script/elm.rb | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 71be2393dc..c9be0daf86 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -2,11 +2,16 @@ module Travis
   module Build
     class Script
       class Elm < NodeJs
+        # Default NodeJS version to install
+        DEFAULT_VERSION = '6.10.0'
+
         DEFAULTS = {
           elm_version: 'latest',
           elm_test_version: 'latest'
         }
 
+        ELM_TEST_REQUIRED_NODE_VERSION = '4.0.0'
+
         def export
           super
           sh.export 'TRAVIS_ELM_VERSION', elm_version, echo: false
@@ -79,9 +84,17 @@ def install_elm
           end
 
           def install_elm_test
-            npm_install '-g elm-test@#{elm_test_version}'
-
-            convert_binary_to_sysconfcpus 'elm-test'
+              sh.if "$(vers2int $(echo `node --version` | tr -d 'v')) -lt $(vers2int #{ELM_TEST_REQUIRED_NODE_VERSION})" do
+                sh.echo "Node.js version $(node --version) does not meet requirement for elm-test." \
+                  " Please use Node.js #{ELM_TEST_REQUIRED_NODE_VERSION} or later.", ansi: :red
+              end
+              sh.else do
+                sh.if "-z \"$(command -v elm-test)\"" do
+                  npm_install '-g elm-test@#{elm_test_version}'
+
+                  convert_binary_to_sysconfcpus 'elm-test'
+                end
+              end
           end
 
           def convert_binary_to_sysconfcpus(binary_name)

From d0dfc51c86b1845e3cdff13fdc043364e452b611 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Fri, 3 Mar 2017 06:17:39 -0800
Subject: [PATCH 17/45] Put install_sysconfcpus behind a fold

---
 lib/travis/build/script/elm.rb | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index c9be0daf86..7a1323aeca 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -109,13 +109,15 @@ def convert_binary_to_sysconfcpus(binary_name)
           end
 
           def install_sysconfcpus
-            # this is a prerequisite for the convert_binary_to_sysconfcpus method
-            # which provides an epic build time improvement - see https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142
-            sh.cmd 'git clone https://github.com/obmarg/libsysconfcpus.git', retry: true
-            sh.cd 'libsysconfcpus'
-            sh.cmd './configure --prefix=$TRAVIS_BUILD_DIR/sysconfcpus'
-            sh.cmd 'make && make install'
-            sh.cd '..'
+            sh.fold 'sysconfcpus' do
+              # this is a prerequisite for the convert_binary_to_sysconfcpus method
+              # which provides an epic build time improvement - see https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142
+              sh.cmd 'git clone https://github.com/obmarg/libsysconfcpus.git', retry: true
+              sh.cd 'libsysconfcpus'
+              sh.cmd './configure --prefix=$TRAVIS_BUILD_DIR/sysconfcpus'
+              sh.cmd 'make && make install'
+              sh.cd '..'
+            end
           end
       end
     end

From 22bc82a32d8a9b3b02ef4f5932be3bc33817b5ff Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Fri, 3 Mar 2017 06:18:35 -0800
Subject: [PATCH 18/45] Use double quotes for string interpolation

---
 lib/travis/build/script/elm.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 7a1323aeca..1ede28e8aa 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -75,7 +75,7 @@ def elm_test_version
 
           def install_elm
             npm_install '-g elm-use@">=1.1.0 <2.0.0"'
-            sh.cmd 'elm-use #{elm_version}', retry: true
+            sh.cmd "elm-use #{elm_version}", retry: true
 
             convert_binary_to_sysconfcpus 'elm'
             convert_binary_to_sysconfcpus 'elm-make'
@@ -90,7 +90,7 @@ def install_elm_test
               end
               sh.else do
                 sh.if "-z \"$(command -v elm-test)\"" do
-                  npm_install '-g elm-test@#{elm_test_version}'
+                  npm_install "-g elm-test@#{elm_test_version}"
 
                   convert_binary_to_sysconfcpus 'elm-test'
                 end

From 8478100eaca39d3f7974918419e3348ee9c8cde9 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Fri, 3 Mar 2017 11:04:40 -0800
Subject: [PATCH 19/45] Upgrade to elm-use 1.1.1

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 1ede28e8aa..661b95ca41 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -74,7 +74,7 @@ def elm_test_version
           end
 
           def install_elm
-            npm_install '-g elm-use@">=1.1.0 <2.0.0"'
+            npm_install '-g elm-use@">=1.1.1 <2.0.0"'
             sh.cmd "elm-use #{elm_version}", retry: true
 
             convert_binary_to_sysconfcpus 'elm'

From b633a4332f80ec13b01cf7dd35e25c4196cc0477 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 23 Mar 2017 22:18:04 -0700
Subject: [PATCH 20/45] Configure default Node version.

---
 lib/travis/build/script/elm.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 661b95ca41..3edca49057 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -3,7 +3,7 @@ module Build
     class Script
       class Elm < NodeJs
         # Default NodeJS version to install
-        DEFAULT_VERSION = '6.10.0'
+        DEFAULT_NODE_VERSION = '6.10.0'
 
         DEFAULTS = {
           elm_version: 'latest',
@@ -21,6 +21,8 @@ def export
         def configure
           super
 
+          config[:node_js] ||= DEFAULT_NODE_VERSION
+
           sh.if '! -d sysconfcpus/bin' do
             install_sysconfcpus
           end

From 7d444528d82596c0f08d97ff6a2f91d5aa49c46a Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Sun, 9 Jul 2017 22:44:55 -0400
Subject: [PATCH 21/45] Use explicit default versions.

---
 lib/travis/build/script/elm.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 3edca49057..8f6668d9a4 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -6,8 +6,8 @@ class Elm < NodeJs
         DEFAULT_NODE_VERSION = '6.10.0'
 
         DEFAULTS = {
-          elm_version: 'latest',
-          elm_test_version: 'latest'
+          elm_version: '0.18.0',
+          elm_test_version: '0.18.7'
         }
 
         ELM_TEST_REQUIRED_NODE_VERSION = '4.0.0'

From acd348fa0f37fa243268490b97a245dca4dff6b9 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 1 Feb 2018 07:11:42 -0500
Subject: [PATCH 22/45] Bump elm-test version to latest.

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 8f6668d9a4..b8a120a976 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -7,7 +7,7 @@ class Elm < NodeJs
 
         DEFAULTS = {
           elm_version: '0.18.0',
-          elm_test_version: '0.18.7'
+          elm_test_version: '0.18.12'
         }
 
         ELM_TEST_REQUIRED_NODE_VERSION = '4.0.0'

From df042a84273e9cfaddd2b08c3b3beadbbebb71c2 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Thu, 1 Feb 2018 07:16:16 -0500
Subject: [PATCH 23/45] Fix tests.

---
 spec/build/script/elm_spec.rb | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/spec/build/script/elm_spec.rb b/spec/build/script/elm_spec.rb
index 0a44a5a542..737a447dda 100644
--- a/spec/build/script/elm_spec.rb
+++ b/spec/build/script/elm_spec.rb
@@ -14,11 +14,11 @@
   it_behaves_like 'a build script sexp'
 
   it 'sets TRAVIS_ELM_VERSION' do
-    should include_sexp [:export, ['TRAVIS_ELM_VERSION', 'latest']]
+    should include_sexp [:export, ['TRAVIS_ELM_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm_version]]]
   end
 
   it 'sets TRAVIS_ELM_TEST_VERSION' do
-    should include_sexp [:export, ['TRAVIS_ELM_TEST_VERSION', 'latest']]
+    should include_sexp [:export, ['TRAVIS_ELM_TEST_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm_test_version]]]
   end
 
   it 'announces elm version' do
@@ -34,6 +34,6 @@
 
   describe '#cache_slug' do
     subject { described_class.new(data).cache_slug }
-    it { is_expected.to eq("cache-#{CACHE_SLUG_EXTRAS}--node--elm-latest") }
+    it { is_expected.to eq("cache-#{CACHE_SLUG_EXTRAS}--node--elm-#{Travis::Build::Script::Elm::DEFAULTS[:elm_version]}") }
   end
 end

From b6697ff5bbe8de4ef3a044fe312cdb5e56a9a384 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Wed, 7 Feb 2018 18:01:01 -0500
Subject: [PATCH 24/45] Put Elm installation behind a fold

---
 lib/travis/build/script/elm.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index b8a120a976..bff074efd5 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -37,8 +37,10 @@ def announce
         def setup
           super
 
-          install_elm
-          install_elm_test
+          sh.fold 'install.elm' do
+            install_elm
+            install_elm_test
+          end
         end
 
         def script

From 9e913d1f01d43fa138ce25e988971d1f9261ad64 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Wed, 7 Feb 2018 18:01:13 -0500
Subject: [PATCH 25/45] Fail fast on elm-format --validate

---
 lib/travis/build/script/elm.rb | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index bff074efd5..44029003d1 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -44,8 +44,7 @@ def setup
         end
 
         def script
-          sh.cmd 'elm-format --validate .'
-          sh.cmd 'elm-test'
+          sh.cmd 'elm-format --validate . && elm-test'
         end
 
         def setup_cache

From 1b7980728851f5f193b002cca45d07804ffabdef Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Wed, 7 Feb 2018 18:03:16 -0500
Subject: [PATCH 26/45] Move install_sysconfcpus to setup

---
 lib/travis/build/script/elm.rb | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 44029003d1..1d373f4278 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -22,10 +22,6 @@ def configure
           super
 
           config[:node_js] ||= DEFAULT_NODE_VERSION
-
-          sh.if '! -d sysconfcpus/bin' do
-            install_sysconfcpus
-          end
         end
 
         def announce
@@ -37,6 +33,10 @@ def announce
         def setup
           super
 
+          sh.if '! -d sysconfcpus/bin' do
+            install_sysconfcpus
+          end
+
           sh.fold 'install.elm' do
             install_elm
             install_elm_test

From 71ace6a19c3c8be7f5a86859aec57b84cc94e724 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Fri, 30 Mar 2018 22:31:01 -0400
Subject: [PATCH 27/45] Fix test.

---
 spec/build/script/elm_spec.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/spec/build/script/elm_spec.rb b/spec/build/script/elm_spec.rb
index 737a447dda..10b3633811 100644
--- a/spec/build/script/elm_spec.rb
+++ b/spec/build/script/elm_spec.rb
@@ -27,8 +27,8 @@
   end
 
   describe 'script' do
-    it 'runs "elm-test"' do
-      should include_sexp [:cmd, 'elm-test', echo: true, timing: true]
+    it 'runs `elm-test` and `elm-format`' do
+      should include_sexp [:cmd, 'elm-format --validate . && elm-test', echo: true, timing: true]
     end
   end
 

From 577858f7bc3e17d6046566ffb4ca0a7d901ff150 Mon Sep 17 00:00:00 2001
From: "DESKTOP-C2QRME4\\Kurren Nischal" <kurren_n@hotmail.com>
Date: Tue, 31 Jul 2018 16:41:31 +0100
Subject: [PATCH 28/45] Added banner stating community maintainers

---
 lib/travis/build/script/elm.rb | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 1d373f4278..597f07015a 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -33,6 +33,16 @@ def announce
         def setup
           super
 
+          sh.echo 'Elm for Travis-CI is not officially supported, ' \
+          'but is community maintained.', ansi: :green
+          sh.echo 'Please file any issues using the following link',
+            ansi: :green
+          sh.echo '  https://github.com/travis-ci/travis-ci/issues' \
+            '/new?labels=community:elm', ansi: :green
+          sh.echo 'and mention \`@avh4\`, \`@lukewestby\`, \`@stoeffel\` and \`@rtfeldman\`' \
+            ' in the issue', ansi: :green
+
+
           sh.if '! -d sysconfcpus/bin' do
             install_sysconfcpus
           end

From f069edfc6956ac373f0414c4376dbc8ccd0f7781 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Mon, 3 Sep 2018 19:00:32 -0400
Subject: [PATCH 29/45] Add methods to extract different version numbers.

---
 lib/travis/build/script/elm.rb | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 597f07015a..dd92b6991c 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -82,6 +82,22 @@ def elm_version
             config[:elm_version].to_s
           end
 
+          def elm_version_number(index)
+            elm_version.split(".")[index]
+          end
+
+          def elm_major_version
+            elm_version_number 0
+          end
+
+          def elm_minor_version
+            elm_version_number 1
+          end
+
+          def elm_patch_version
+            elm_version_number 2
+          end
+
           def elm_test_version
             config[:elm_test_version].to_s
           end

From 9f43237d619e285316dadc5dd410449c5e0d5b2d Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Mon, 3 Sep 2018 19:01:06 -0400
Subject: [PATCH 30/45] Account for Elm 0.19+ having only one binary.

---
 lib/travis/build/script/elm.rb | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index dd92b6991c..90dd9a37a4 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -107,9 +107,14 @@ def install_elm
             sh.cmd "elm-use #{elm_version}", retry: true
 
             convert_binary_to_sysconfcpus 'elm'
-            convert_binary_to_sysconfcpus 'elm-make'
-            convert_binary_to_sysconfcpus 'elm-package'
-            convert_binary_to_sysconfcpus 'elm-format'
+
+            # Beginning with Elm 0.19, there's one `elm` binary and that's it.
+            # In that case, there won't be any files to convert here!
+            if elm_major_version == 0 && elm_minor_version <= 18
+              convert_binary_to_sysconfcpus 'elm-make'
+              convert_binary_to_sysconfcpus 'elm-package'
+              convert_binary_to_sysconfcpus 'elm-format'
+            end
           end
 
           def install_elm_test

From 70fe4edbac30677019eaf4c71e990f11b9983084 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Mon, 3 Sep 2018 19:07:51 -0400
Subject: [PATCH 31/45] Cache ~/.elm

---
 lib/travis/build/script/elm.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 90dd9a37a4..90a8113d6c 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -60,6 +60,9 @@ def script
         def setup_cache
           if data.cache?(:elm)
             sh.fold 'cache.elm' do
+              # Cache the ~/.elm directory.
+              directory_cache.add '$HOME/.cache/elm', '$HOME/.elm'
+
               directory_cache.add '$HOME/.cache/elm-stuff', 'elm-stuff'
 
               # some put their tests in ./test and others use ./tests

From 912e64758ff7341beec33f6e0fbe2d4648fda856 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Mon, 3 Sep 2018 19:10:41 -0400
Subject: [PATCH 32/45] Only cache tests/ in Elm 0.19+

---
 lib/travis/build/script/elm.rb | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 90a8113d6c..559d249090 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -65,8 +65,13 @@ def setup_cache
 
               directory_cache.add '$HOME/.cache/elm-stuff', 'elm-stuff'
 
-              # some put their tests in ./test and others use ./tests
-              directory_cache.add '$HOME/.cache/elm-test-stuff', 'test/elm-stuff'
+              if elm_major_version == 0 && elm_minor_version <= 18
+                # In Elm 0.18, some put their tests in ./test instead of ./tests
+                directory_cache.add '$HOME/.cache/elm-test-stuff', 'test/elm-stuff'
+              end
+
+              # In Elm 0.18+, all tests must live in tests/ (whereas previously
+              # tests/ was allowed, but so was test/)
               directory_cache.add '$HOME/.cache/elm-tests-stuff', 'tests/elm-stuff'
 
               # we build sysconfcpus from source, so cache the result

From 0f82be371d3951d47428c356566c902ea401bce9 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Mon, 3 Sep 2018 19:12:58 -0400
Subject: [PATCH 33/45] Rename config variables to :elm and :elm_test

See https://github.com/travis-ci/travis-build/pull/934\#issuecomment-418031168
---
 lib/travis/build/script/elm.rb | 8 ++++----
 spec/build/script/elm_spec.rb  | 6 +++---
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 559d249090..d1dd94ec1f 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -6,8 +6,8 @@ class Elm < NodeJs
         DEFAULT_NODE_VERSION = '6.10.0'
 
         DEFAULTS = {
-          elm_version: '0.18.0',
-          elm_test_version: '0.18.12'
+          elm: '0.18.0',
+          elm_test: '0.18.12'
         }
 
         ELM_TEST_REQUIRED_NODE_VERSION = '4.0.0'
@@ -87,7 +87,7 @@ def cache_slug
         private
 
           def elm_version
-            config[:elm_version].to_s
+            config[:elm].to_s
           end
 
           def elm_version_number(index)
@@ -107,7 +107,7 @@ def elm_patch_version
           end
 
           def elm_test_version
-            config[:elm_test_version].to_s
+            config[:elm_test].to_s
           end
 
           def install_elm
diff --git a/spec/build/script/elm_spec.rb b/spec/build/script/elm_spec.rb
index 10b3633811..05dce0c447 100644
--- a/spec/build/script/elm_spec.rb
+++ b/spec/build/script/elm_spec.rb
@@ -14,11 +14,11 @@
   it_behaves_like 'a build script sexp'
 
   it 'sets TRAVIS_ELM_VERSION' do
-    should include_sexp [:export, ['TRAVIS_ELM_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm_version]]]
+    should include_sexp [:export, ['TRAVIS_ELM_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm]]]
   end
 
   it 'sets TRAVIS_ELM_TEST_VERSION' do
-    should include_sexp [:export, ['TRAVIS_ELM_TEST_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm_test_version]]]
+    should include_sexp [:export, ['TRAVIS_ELM_TEST_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm_test]]]
   end
 
   it 'announces elm version' do
@@ -34,6 +34,6 @@
 
   describe '#cache_slug' do
     subject { described_class.new(data).cache_slug }
-    it { is_expected.to eq("cache-#{CACHE_SLUG_EXTRAS}--node--elm-#{Travis::Build::Script::Elm::DEFAULTS[:elm_version]}") }
+    it { is_expected.to eq("cache-#{CACHE_SLUG_EXTRAS}--node--elm-#{Travis::Build::Script::Elm::DEFAULTS[:elm]}") }
   end
 end

From 0c84815f33b094df46fc6c2faf9e08ce660b69ef Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Mon, 3 Sep 2018 19:15:22 -0400
Subject: [PATCH 34/45] Bump default node version to 8.9.1

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index d1dd94ec1f..48094c6f05 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -3,7 +3,7 @@ module Build
     class Script
       class Elm < NodeJs
         # Default NodeJS version to install
-        DEFAULT_NODE_VERSION = '6.10.0'
+        DEFAULT_NODE_VERSION = '8.9.1'
 
         DEFAULTS = {
           elm: '0.18.0',

From bc69eeeec1b844933b7169cc37d573836af4bf12 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Mon, 3 Sep 2018 19:16:11 -0400
Subject: [PATCH 35/45] Default to Elm 0.19

---
 lib/travis/build/script/elm.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 48094c6f05..0970d5a6e5 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -6,8 +6,8 @@ class Elm < NodeJs
         DEFAULT_NODE_VERSION = '8.9.1'
 
         DEFAULTS = {
-          elm: '0.18.0',
-          elm_test: '0.18.12'
+          elm: '0.19.0',
+          elm_test: '0.19.0'
         }
 
         ELM_TEST_REQUIRED_NODE_VERSION = '4.0.0'

From ccdb739c3c28f80c3dc66c9dd010d811301d4dc5 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 6 Nov 2018 20:22:08 -0500
Subject: [PATCH 36/45] elm-test now requires Node 6+

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 0970d5a6e5..2ec395639f 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -10,7 +10,7 @@ class Elm < NodeJs
           elm_test: '0.19.0'
         }
 
-        ELM_TEST_REQUIRED_NODE_VERSION = '4.0.0'
+        ELM_TEST_REQUIRED_NODE_VERSION = '6.0.0'
 
         def export
           super

From ea1a0e101af3f7310cb9a6d0be761e5a5d3052e8 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 6 Nov 2018 20:22:36 -0500
Subject: [PATCH 37/45] Print elm-format version number.

---
 lib/travis/build/script/elm.rb | 4 ++++
 spec/build/script/elm_spec.rb  | 1 +
 2 files changed, 5 insertions(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 2ec395639f..027b5e95e7 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -28,6 +28,10 @@ def announce
           super
           sh.cmd 'elm --version', echo: true
           sh.cmd 'elm-test --version', echo: true
+
+          # elm-format doesn't have --version,
+          # but the first line of `elm-format --help` prints the version
+          sh.cmd 'elm-format --help | head -n 1', echo: true
         end
 
         def setup
diff --git a/spec/build/script/elm_spec.rb b/spec/build/script/elm_spec.rb
index 05dce0c447..0e60a0a5ff 100644
--- a/spec/build/script/elm_spec.rb
+++ b/spec/build/script/elm_spec.rb
@@ -24,6 +24,7 @@
   it 'announces elm version' do
     should include_sexp [:cmd, 'elm --version', echo: true]
     should include_sexp [:cmd, 'elm-test --version', echo: true]
+    should include_sexp [:cmd, 'elm-format --help | head -n 1', echo: true]
   end
 
   describe 'script' do

From 583dd23c043fa6f672c03de46be7f681a8008d9a Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 6 Nov 2018 20:23:24 -0500
Subject: [PATCH 38/45] Clarify comment

---
 lib/travis/build/script/elm.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 027b5e95e7..8a425d5533 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -74,8 +74,8 @@ def setup_cache
                 directory_cache.add '$HOME/.cache/elm-test-stuff', 'test/elm-stuff'
               end
 
-              # In Elm 0.18+, all tests must live in tests/ (whereas previously
-              # tests/ was allowed, but so was test/)
+              # In Elm 0.18+, all tests live in tests/ by default
+              # (whereas previously tests/ was allowed, but so was test/)
               directory_cache.add '$HOME/.cache/elm-tests-stuff', 'tests/elm-stuff'
 
               # we build sysconfcpus from source, so cache the result

From e2e610fed8377fc96a5acb636a314326ed4f0867 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 6 Nov 2018 20:23:36 -0500
Subject: [PATCH 39/45] Replace `elm-use` with @elm-#{version} convention.

Now you can `npm install` (for example) elm-test@elm-0.19.0, which installs
the latest version of elm-test that is compatible with elm 0.19.0.

This version tagging convention is consistent across `elm`, `elm-test`,
and `elm-format`, so `elm-use` is no longer necessary!
---
 lib/travis/build/script/elm.rb | 18 +++++++++++++++---
 spec/build/script/elm_spec.rb  |  4 ++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 8a425d5533..a965c578de 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -7,7 +7,8 @@ class Elm < NodeJs
 
         DEFAULTS = {
           elm: '0.19.0',
-          elm_test: '0.19.0'
+          elm_test: '0.19.0',
+          elm_format: '0.19.0'
         }
 
         ELM_TEST_REQUIRED_NODE_VERSION = '6.0.0'
@@ -16,6 +17,7 @@ def export
           super
           sh.export 'TRAVIS_ELM_VERSION', elm_version, echo: false
           sh.export 'TRAVIS_ELM_TEST_VERSION', elm_test_version, echo: false
+          sh.export 'TRAVIS_ELM_FORMAT_VERSION', elm_format_version, echo: false
         end
 
         def configure
@@ -54,6 +56,7 @@ def setup
           sh.fold 'install.elm' do
             install_elm
             install_elm_test
+            install_elm_format
           end
         end
 
@@ -114,9 +117,12 @@ def elm_test_version
             config[:elm_test].to_s
           end
 
+          def elm_format_version
+            config[:elm_format].to_s
+          end
+
           def install_elm
-            npm_install '-g elm-use@">=1.1.1 <2.0.0"'
-            sh.cmd "elm-use #{elm_version}", retry: true
+            npm_install "-g elm@elm-#{elm_version}"
 
             convert_binary_to_sysconfcpus 'elm'
 
@@ -129,6 +135,12 @@ def install_elm
             end
           end
 
+          def install_elm_format
+            npm_install "-g elm-format@elm-#{elm_format_version}"
+
+            convert_binary_to_sysconfcpus 'elm-format'
+          end
+
           def install_elm_test
               sh.if "$(vers2int $(echo `node --version` | tr -d 'v')) -lt $(vers2int #{ELM_TEST_REQUIRED_NODE_VERSION})" do
                 sh.echo "Node.js version $(node --version) does not meet requirement for elm-test." \
diff --git a/spec/build/script/elm_spec.rb b/spec/build/script/elm_spec.rb
index 0e60a0a5ff..e2213db730 100644
--- a/spec/build/script/elm_spec.rb
+++ b/spec/build/script/elm_spec.rb
@@ -21,6 +21,10 @@
     should include_sexp [:export, ['TRAVIS_ELM_TEST_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm_test]]]
   end
 
+  it 'sets TRAVIS_ELM_FORMAT_VERSION' do
+    should include_sexp [:export, ['TRAVIS_ELM_FORMAT_VERSION', Travis::Build::Script::Elm::DEFAULTS[:elm_format]]]
+  end
+
   it 'announces elm version' do
     should include_sexp [:cmd, 'elm --version', echo: true]
     should include_sexp [:cmd, 'elm-test --version', echo: true]

From 74f7059eab2e893a5cea513c06846070403feebe Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Wed, 7 Nov 2018 12:02:18 -0500
Subject: [PATCH 40/45] Have Elm default to current Node LTS

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index a965c578de..560a799a9a 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -3,7 +3,7 @@ module Build
     class Script
       class Elm < NodeJs
         # Default NodeJS version to install
-        DEFAULT_NODE_VERSION = '8.9.1'
+        DEFAULT_NODE_VERSION = '10.13.0'
 
         DEFAULTS = {
           elm: '0.19.0',

From 8a7d251486d6df9d6f1e95a72188eef5f7cd32aa Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Wed, 7 Nov 2018 12:03:11 -0500
Subject: [PATCH 41/45] Remove unnecessary 'when' clause

---
 lib/travis/build.rb | 2 --
 1 file changed, 2 deletions(-)

diff --git a/lib/travis/build.rb b/lib/travis/build.rb
index be1d36c3a5..beef932b38 100644
--- a/lib/travis/build.rb
+++ b/lib/travis/build.rb
@@ -49,8 +49,6 @@ def by_lang(lang)
           Script::ObjectiveC
         when 'bash', 'sh', 'shell', 'minimal' then
           Script::Generic
-        when 'elm' then
-          Script::Elm
         else
           name = lang.split('_').map { |w| w.capitalize }.join
           Script.const_get(name, false) rescue Script::Ruby

From 294455217d26c8a01fe8aa979fa5e5a8127ead9c Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 20 Nov 2018 04:47:19 +0100
Subject: [PATCH 42/45] vers2int -> travis_vers2int

---
 lib/travis/build/script/elm.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 560a799a9a..2e942d47fb 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -142,7 +142,7 @@ def install_elm_format
           end
 
           def install_elm_test
-              sh.if "$(vers2int $(echo `node --version` | tr -d 'v')) -lt $(vers2int #{ELM_TEST_REQUIRED_NODE_VERSION})" do
+              sh.if "$(travis_vers2int $(echo `node --version` | tr -d 'v')) -lt $(travis_vers2int #{ELM_TEST_REQUIRED_NODE_VERSION})" do
                 sh.echo "Node.js version $(node --version) does not meet requirement for elm-test." \
                   " Please use Node.js #{ELM_TEST_REQUIRED_NODE_VERSION} or later.", ansi: :red
               end

From f53ea8a36a6ee1ab463e482bcd1bdd5e1f182708 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 20 Nov 2018 04:33:59 +0100
Subject: [PATCH 43/45] Use npm_install_global over npm_install

---
 lib/travis/build/script/elm.rb | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 2e942d47fb..22551d7c4e 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -6,9 +6,9 @@ class Elm < NodeJs
         DEFAULT_NODE_VERSION = '10.13.0'
 
         DEFAULTS = {
-          elm: '0.19.0',
-          elm_test: '0.19.0',
-          elm_format: '0.19.0'
+          elm: 'elm0.19.0',
+          elm_test: 'elm0.19.0',
+          elm_format: 'elm0.19.0'
         }
 
         ELM_TEST_REQUIRED_NODE_VERSION = '6.0.0'
@@ -98,7 +98,7 @@ def elm_version
           end
 
           def elm_version_number(index)
-            elm_version.split(".")[index]
+            elm_version.gsub(/[a-zA-Z]/, "").split(".")[index]
           end
 
           def elm_major_version
@@ -121,8 +121,12 @@ def elm_format_version
             config[:elm_format].to_s
           end
 
+          def npm_install_global(package_name, package_version)
+            sh.cmd "npm install -g #{package_name}@#{package_version}"
+          end
+
           def install_elm
-            npm_install "-g elm@elm-#{elm_version}"
+            npm_install_global 'elm', elm_version
 
             convert_binary_to_sysconfcpus 'elm'
 
@@ -136,7 +140,7 @@ def install_elm
           end
 
           def install_elm_format
-            npm_install "-g elm-format@elm-#{elm_format_version}"
+            npm_install_global 'elm-format', elm_format_version
 
             convert_binary_to_sysconfcpus 'elm-format'
           end
@@ -148,7 +152,7 @@ def install_elm_test
               end
               sh.else do
                 sh.if "-z \"$(command -v elm-test)\"" do
-                  npm_install "-g elm-test@#{elm_test_version}"
+                  npm_install_global 'elm-test', elm_test_version
 
                   convert_binary_to_sysconfcpus 'elm-test'
                 end

From 17d4a121f4d18126b59a902eac364b8711395d63 Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 20 Nov 2018 05:09:44 +0100
Subject: [PATCH 44/45] Add a blank line after announce

---
 lib/travis/build/script/elm.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 22551d7c4e..1d8611e5f5 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -34,6 +34,8 @@ def announce
           # elm-format doesn't have --version,
           # but the first line of `elm-format --help` prints the version
           sh.cmd 'elm-format --help | head -n 1', echo: true
+
+          sh.echo '' # A blank line visually separates this from the next cmd
         end
 
         def setup

From e386ff219defbe58bbe931cc0b66b57e866d818c Mon Sep 17 00:00:00 2001
From: Richard Feldman <richard.t.feldman@gmail.com>
Date: Tue, 20 Nov 2018 05:09:57 +0100
Subject: [PATCH 45/45] Add some colored echo statements

---
 lib/travis/build/script/elm.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/travis/build/script/elm.rb b/lib/travis/build/script/elm.rb
index 1d8611e5f5..76697aa58d 100644
--- a/lib/travis/build/script/elm.rb
+++ b/lib/travis/build/script/elm.rb
@@ -55,6 +55,7 @@ def setup
             install_sysconfcpus
           end
 
+          sh.echo 'Installing elm, elm-test, and elm-format', ansi: :green
           sh.fold 'install.elm' do
             install_elm
             install_elm_test
@@ -173,6 +174,7 @@ def convert_binary_to_sysconfcpus(binary_name)
           end
 
           def install_sysconfcpus
+            sh.echo 'Installing sysconfcpus', ansi: :green
             sh.fold 'sysconfcpus' do
               # this is a prerequisite for the convert_binary_to_sysconfcpus method
               # which provides an epic build time improvement - see https://github.com/elm-lang/elm-compiler/issues/1473#issuecomment-245704142