Introduce testing

.circleci/config.yml

@@ -0,0 +1,47 @@
+
+version: 2
+references:
+  unit: &unit
+    run:
+      name: Run test suite
+      command: PARALLEL_SPLIT_TEST_PROCESSES=25 bundle exec parallel_split_test spec/
+  restore: &restore
+    restore_cache:
+      keys:
+        - v1_bundler_deps-{{ .Environment.CIRCLE_JOB }}
+  save: &save
+    save_cache:
+      paths:
+        - ./vendor/bundle
+      key: v1_bundler_deps-{{ .Environment.CIRCLE_JOB }} # CIRCLE_JOB e.g. "ruby-2.5"
+  hatchet_setup: &hatchet_setup
+    run:
+      name: Hatchet setup
+      command: |
+        bundle exec hatchet ci:setup
+  bundle: &bundle
+    run:
+      name: install dependencies
+      command: |
+        bundle install --jobs=4 --retry=3 --path vendor/bundle
+        bundle update
+        bundle clean
+
+jobs:
+  "ruby-2.7":
+    docker:
+      - image: circleci/ruby:2.7
+    steps:
+      - checkout
+      - <<: *restore
+      - <<: *bundle
+      - <<: *hatchet_setup
+      - <<: *unit
+      - <<: *save
+
+workflows:
+  version: 2
+  build:
+    jobs:
+      - "ruby-2.7"
+

.gitignore

@@ -0,0 +1,4 @@
+.DS_Store
+.rspec_status
+
+spec/fixtures/repos/generated/*

Gemfile

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+source "https://rubygems.org"
+
+gem "parallel_split_test"
+gem "heroku_hatchet"
+gem "rspec-retry"

Gemfile.lock

@@ -0,0 +1,75 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    activesupport (6.0.3.1)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
+      minitest (~> 5.1)
+      tzinfo (~> 1.1)
+      zeitwerk (~> 2.2, >= 2.2.2)
+    concurrent-ruby (1.1.6)
+    diff-lcs (1.3)
+    erubis (2.7.0)
+    excon (0.73.0)
+    heroics (0.0.25)
+      erubis (~> 2.0)
+      excon
+      moneta
+      multi_json (>= 1.9.2)
+    heroku_hatchet (5.0.3)
+      excon (~> 0)
+      minitest-retry (~> 0.1.9)
+      platform-api (~> 2)
+      repl_runner (~> 0.0.3)
+      rrrretry (~> 1)
+      thor (~> 0)
+      threaded (~> 0)
+    i18n (1.8.2)
+      concurrent-ruby (~> 1.0)
+    minitest (5.14.1)
+    minitest-retry (0.1.9)
+      minitest (>= 5.0)
+    moneta (1.0.0)
+    multi_json (1.14.1)
+    parallel (1.19.1)
+    parallel_split_test (0.7.0)
+      parallel (>= 0.5.13)
+      rspec (>= 3.1.0)
+    platform-api (2.2.0)
+      heroics (~> 0.0.25)
+      moneta (~> 1.0.0)
+    repl_runner (0.0.3)
+      activesupport
+    rrrretry (1.0.0)
+    rspec (3.9.0)
+      rspec-core (~> 3.9.0)
+      rspec-expectations (~> 3.9.0)
+      rspec-mocks (~> 3.9.0)
+    rspec-core (3.9.2)
+      rspec-support (~> 3.9.3)
+    rspec-expectations (3.9.2)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-mocks (3.9.1)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.9.0)
+    rspec-retry (0.6.2)
+      rspec-core (> 3.3)
+    rspec-support (3.9.3)
+    thor (0.20.3)
+    thread_safe (0.3.6)
+    threaded (0.0.4)
+    tzinfo (1.2.7)
+      thread_safe (~> 0.1)
+    zeitwerk (2.3.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  heroku_hatchet
+  parallel_split_test
+  rspec-retry
+
+BUNDLED WITH
+   2.1.4

bin/compile

@@ -1,4 +1,4 @@
-#! /usr/bin/env ruby
+#!/usr/bin/env ruby
 
 require 'pathname'
 require 'fileutils'
@@ -17,19 +17,23 @@ FileUtils.mv(check_script, vendor_file)
 
 puts "-----> Updating release script in procfile"
 procfile = BUILD_DIR.join("Procfile")
+
+procfile_written = false
+
 if procfile.file?
-  contents = +""
+  contents = String.new("")
   procfile.each_line do |line|
     if line.start_with?("release")
+      procfile_written = true
       contents << "#{line.chomp} && ruby bin/check_paths\n"
     else
       contents << line
     end
   end
 
   procfile.write(contents)
-else
-  procfile.write("release: ruby bin/check_paths\n")
 end
 
+procfile.write("release: ruby bin/check_paths\n") unless procfile_written
+
 exit(0)

hatchet.json

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+{}

hatchet.lock

@@ -0,0 +1 @@
+--- []

spec/hatchet/buildpack_spec.rb

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+require_relative "../spec_helper.rb"
+
+RSpec.describe "This buildpack" do
+  it "accepts absolute paths at build and runtime" do
+    app_dir = generate_fixture_app(
+      name: "works",
+      compile_script: <<~EOM
+        #!/usr/bin/env bash
+
+
+        # Test export
+        echo "PATH=/good/absolute/path:$PATH" >> export
+
+        # Test .profile.d
+        BUILD_DIR=$1
+        mkdir -p $BUILD_DIR/.profile.d
+
+        echo "PATH=/good/absolute/path:$PATH" >> $BUILD_DIR/.profile.d/my.sh
+      EOM
+    )
+
+    buildpacks = [
+      "https://github.com/heroku/heroku-buildpack-inline",
+      :default
+    ]
+
+    Hatchet::Runner.new(app_dir, buildpacks: buildpacks).deploy do |app|
+      expect(app.output).to_not include("All paths must be absolute")
+    end
+  end
+
+  describe "export detection" do
+    it "errors on relative paths" do
+      app_dir = generate_fixture_app(
+        name: "export_fails_relative",
+        compile_script: <<~EOM
+          #!/usr/bin/env bash
+
+          echo "PATH=bad_export_path_because_im_relative:$PATH" >> export
+        EOM
+      )
+
+      buildpacks = [
+        "https://github.com/heroku/heroku-buildpack-inline",
+        :default
+      ]
+
+      Hatchet::Runner.new(app_dir, buildpacks: buildpacks, allow_failure: true).deploy do |app|
+        expect(app.output).to include("All paths must be absolute")
+      end
+    end
+  end
+
+  describe "profile.d detection" do
+    it "errors on relative paths" do
+      app_dir = generate_fixture_app(
+        name: "export_fails_relative",
+        compile_script: <<~EOM
+          #!/usr/bin/env bash
+
+          BUILD_DIR=$1
+          mkdir -p $BUILD_DIR/.profile.d
+
+          echo "PATH=bad_export_path_because_im_relative:$PATH" >> $BUILD_DIR/.profile.d/my.sh
+        EOM
+      )
+
+      buildpacks = [
+        "https://github.com/heroku/heroku-buildpack-inline",
+        :default
+      ]
+
+      Hatchet::Runner.new(app_dir, buildpacks: buildpacks, allow_failure: true).deploy do |app|
+        expect(app.output).to include("All paths must be absolute")
+      end
+    end
+  end
+end

spec/spec_helper.rb

@@ -0,0 +1,57 @@
+require "bundler/setup"
+
+require 'rspec/retry'
+
+ENV["HATCHET_BUILDPACK_BASE"] = "https://github.com/sharpstone/force_absolute_paths_buildpack.git"
+
+require 'hatchet'
+require 'pathname'
+
+RSpec.configure do |config|
+  # Enable flags like --only-failures and --next-failure
+  config.example_status_persistence_file_path = ".rspec_status"
+  config.verbose_retry       = true # show retry status in spec process
+  config.default_retry_count = 2 if ENV['IS_RUNNING_ON_CI'] # retry all tests that fail again
+
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+end
+
+require 'parallel_tests/test/runtime_logger' if ENV['RECORD_RUNTIME']
+
+def run!(cmd)
+  out = `#{cmd}`
+  raise "Error running #{cmd}, output: #{out}" unless $?.success?
+  out
+end
+
+def spec_dir
+  Pathname.new(__dir__)
+end
+
+
+def generate_fixture_app(compile_script:, name: )
+  app_dir = spec_dir.join("fixtures/repos/generated/#{name}")
+  bin_dir = app_dir.join("bin")
+  bin_dir.mkpath
+
+  bin_compile = bin_dir.join("compile")
+  bin_compile.write(compile_script)
+
+  bin_detect = bin_dir.join("detect")
+  bin_detect.write(<<~EOM)
+    #!/usr/bin/env bash
+
+    echo "inline buildpack"
+
+    exit 0
+  EOM
+
+  app_dir.join("Procfile").write("")
+
+  FileUtils.chmod("+x", bin_compile)
+  FileUtils.chmod("+x", bin_detect)
+
+  app_dir
+end