Replace .env* with .kamal/env*

By default look for the env file in .kamal/env to avoid clashes with
other tools using .env.

For now we'll still load .env and issue a deprecation warning, but in
future we'll stop reading those.

.github/workflows/ci.yml

@@ -24,25 +24,12 @@ jobs:
     strategy:
       matrix:
         ruby-version:
-          - "2.7"
           - "3.1"
           - "3.2"
           - "3.3"
         gemfile:
           - Gemfile
-          - gemfiles/ruby_2.7.gemfile
           - gemfiles/rails_edge.gemfile
-        exclude:
-          - ruby-version: "2.7"
-            gemfile: Gemfile
-          - ruby-version: "2.7"
-            gemfile: gemfiles/rails_edge.gemfile
-          - ruby-version: "3.1"
-            gemfile: gemfiles/ruby_2.7.gemfile
-          - ruby-version: "3.2"
-            gemfile: gemfiles/ruby_2.7.gemfile
-          - ruby-version: "3.3"
-            gemfile: gemfiles/ruby_2.7.gemfile
     name: ${{ format('Tests (Ruby {0})', matrix.ruby-version) }}
     runs-on: ubuntu-latest
     continue-on-error: true

Dockerfile

@@ -14,7 +14,7 @@ COPY Gemfile Gemfile.lock kamal.gemspec ./
 COPY lib/kamal/version.rb /kamal/lib/kamal/version.rb
 
 # Install system dependencies
-RUN apk add --no-cache --update build-base git docker openrc openssh-client-default \
+RUN apk add --no-cache build-base git docker openrc openssh-client-default \
     && rc-update add docker boot \
     && gem install bundler --version=2.4.3 \
     && bundle install

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    kamal (1.7.2)
+    kamal (1.8.1)
       activesupport (>= 7.0)
       base64 (~> 0.2)
       bcrypt_pbkdf (~> 1.0)
@@ -9,9 +9,8 @@ PATH
       dotenv (~> 2.8)
       ed25519 (~> 1.2)
       net-ssh (~> 7.0)
-      sshkit (>= 1.22.2, < 2.0)
+      sshkit (>= 1.23.0, < 2.0)
       thor (~> 1.2)
-      x25519 (~> 1.0, >= 1.0.10)
       zeitwerk (~> 2.5)
 
 GEM
@@ -154,9 +153,8 @@ GEM
       rubocop-rails
     ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
-    sshkit (1.22.2)
+    sshkit (1.23.0)
       base64
-      mutex_m
       net-scp (>= 1.1.2)
       net-sftp (>= 2.1.2)
       net-ssh (>= 2.8.0)
@@ -166,7 +164,6 @@ GEM
       concurrent-ruby (~> 1.0)
     unicode-display_width (2.5.0)
     webrick (1.8.1)
-    x25519 (1.0.10)
     zeitwerk (2.6.12)
 
 PLATFORMS

gemfiles/ruby_2.7.gemfile

@@ -1,6 +0,0 @@
-source 'https://rubygems.org'
-git_source(:github) { |repo| "https://github.com/#{repo}.git" }
-
-gemspec path: "../"
-
-gem "nokogiri", "~> 1.15.0"

kamal.gemspec

@@ -12,13 +12,12 @@ Gem::Specification.new do |spec|
   spec.executables = %w[ kamal ]
 
   spec.add_dependency "activesupport", ">= 7.0"
-  spec.add_dependency "sshkit", ">= 1.22.2", "< 2.0"
+  spec.add_dependency "sshkit", ">= 1.23.0", "< 2.0"
   spec.add_dependency "net-ssh", "~> 7.0"
   spec.add_dependency "thor", "~> 1.2"
   spec.add_dependency "dotenv", "~> 2.8"
   spec.add_dependency "zeitwerk", "~> 2.5"
   spec.add_dependency "ed25519", "~> 1.2"
-  spec.add_dependency "x25519", "~> 1.0", ">= 1.0.10"
   spec.add_dependency "bcrypt_pbkdf", "~> 1.0"
   spec.add_dependency "concurrent-ruby", "~> 1.2"
   spec.add_dependency "base64", "~> 0.2"

lib/kamal/cli/base.rb

@@ -25,23 +25,58 @@ module Kamal::Cli
     def initialize(*)
       super
       @original_env = ENV.to_h.dup
-      load_envs
+      load_env
       initialize_commander(options_with_subcommand_class_options)
     end
 
     private
-      def load_envs
+      def reload_env
+        reset_env
+        load_env
+      end
+
+      def load_env
         if destination = options[:destination]
-          Dotenv.load(".env.#{destination}", ".env")
+          if File.exist?(".kamal/env.#{destination}") || File.exist?(".kamal/env")
+            Dotenv.load(".kamal/env.#{destination}", ".kamal/env")
           else
+            loading_files = [ (".env" if File.exist?(".env")), (".env.#{destination}" if File.exist?(".env.#{destination}")) ].compact
+            if loading_files.any?
+              warn "Loading #{loading_files.join(" and ")} from the project root, use .kamal/env* instead"
+              Dotenv.load(".env.#{destination}", ".env")
+            end
+          end
+        else
+          if File.exist?(".kamal/env")
+            Dotenv.load(".kamal/env")
+          elsif File.exist?(".env")
+            warn "Loading .env from the project root is deprecated, use .kamal/env instead"
             Dotenv.load(".env")
           end
         end
+      end
 
-      def reload_envs
+      def reset_env
+        replace_env @original_env
+      end
+
+      def replace_env(env)
         ENV.clear
-        ENV.update(@original_env)
+        ENV.update(env)
-        load_envs
+      end
+
+      def with_original_env
+        keeping_current_env do
+          reset_env
+          yield
+        end
+      end
+
+      def keeping_current_env
+        current_env = ENV.to_h.dup
+        yield
+      ensure
+        replace_env(current_env)
       end
 
       def options_with_subcommand_class_options

lib/kamal/cli/build.rb

@@ -59,11 +59,14 @@ class Kamal::Cli::Build < Kamal::Cli::Base
 
   desc "pull", "Pull app image from registry onto servers"
   def pull
-    on(KAMAL.hosts) do
+    if (first_hosts = mirror_hosts).any?
-      execute *KAMAL.auditor.record("Pulled image with version #{KAMAL.config.version}"), verbosity: :debug
+      #  Pull on a single host per mirror first to seed them
-      execute *KAMAL.builder.clean, raise_on_non_zero_exit: false
+      say "Pulling image on #{first_hosts.join(", ")} to seed the #{"mirror".pluralize(first_hosts.count)}...", :magenta
-      execute *KAMAL.builder.pull
+      pull_on_hosts(first_hosts)
-      execute *KAMAL.builder.validate_image
+      say "Pulling image on remaining hosts...", :magenta
+      pull_on_hosts(KAMAL.hosts - first_hosts)
+    else
+      pull_on_hosts(KAMAL.hosts)
     end
   end
 
@@ -131,4 +134,28 @@ class Kamal::Cli::Build < Kamal::Cli::Base
         end
       end
     end
+
+    def mirror_hosts
+      if KAMAL.hosts.many?
+        mirror_hosts = Concurrent::Hash.new
+        on(KAMAL.hosts) do |host|
+          first_mirror = capture_with_info(*KAMAL.builder.first_mirror).strip.presence
+          mirror_hosts[first_mirror] ||= host.to_s if first_mirror
+        rescue SSHKit::Command::Failed => e
+          raise unless e.message =~ /error calling index: reflect: slice index out of range/
+        end
+        mirror_hosts.values
+      else
+        []
+      end
+    end
+
+    def pull_on_hosts(hosts)
+      on(hosts) do
+        execute *KAMAL.auditor.record("Pulled image with version #{KAMAL.config.version}"), verbosity: :debug
+        execute *KAMAL.builder.clean, raise_on_non_zero_exit: false
+        execute *KAMAL.builder.pull
+        execute *KAMAL.builder.validate_image
+      end
+    end
 end

lib/kamal/cli/main.rb

@@ -182,6 +182,15 @@ class Kamal::Cli::Main < Kamal::Cli::Base
   desc "envify", "Create .env by evaluating .env.erb (or .env.staging.erb -> .env.staging when using -d staging)"
   option :skip_push, aliases: "-P", type: :boolean, default: false, desc: "Skip .env file push"
   def envify
+    if destination = options[:destination]
+      env_template_path = ".kamal/env.#{destination}.erb"
+      env_path          = ".kamal/env.#{destination}"
+    else
+      env_template_path = ".kamal/env.erb"
+      env_path          = ".kamal/env"
+    end
+
+    unless Pathname.new(File.expand_path(env_template_path)).exist?
       if destination = options[:destination]
         env_template_path = ".env.#{destination}.erb"
         env_path          = ".env.#{destination}"
@@ -191,10 +200,17 @@ class Kamal::Cli::Main < Kamal::Cli::Base
       end
 
       if Pathname.new(File.expand_path(env_template_path)).exist?
-      File.write(env_path, ERB.new(File.read(env_template_path), trim_mode: "-").result, perm: 0600)
+        warn "Loading #{env_template_path} from the project root is deprecated, use .kamal/env[.<DESTINATION>].erb instead"
+      end
+    end
+
+    if Pathname.new(File.expand_path(env_template_path)).exist?
+      # Ensure existing env doesn't pollute template evaluation
+      content = with_original_env { ERB.new(File.read(env_template_path), trim_mode: "-").result }
+      File.write(env_path, content, perm: 0600)
 
       unless options[:skip_push]
-        reload_envs
+        reload_env
         invoke "kamal:cli:env:push", options
       end
     else

lib/kamal/cli/templates/sample_hooks/docker-setup.sample

@@ -1,7 +1,13 @@
-#!/bin/sh
+#!/usr/bin/env ruby
 
 # A sample docker-setup hook
 #
-# Sets up a Docker network which can then be used by the application’s containers
+# Sets up a Docker network on defined hosts which can then be used by the application’s containers
 
-ssh user@example.com docker network create kamal
+hosts = ENV["KAMAL_HOSTS"].split(",")
+
+hosts.each do |ip|
+  destination = "root@#{ip}"
+  puts "Creating a Docker network \"kamal\" on #{destination}"
+  `ssh #{destination} docker network create kamal`
+end

lib/kamal/commands/auditor.rb

@@ -9,7 +9,7 @@ class Kamal::Commands::Auditor < Kamal::Commands::Base
   # Runs remotely
   def record(line, **details)
     append \
-      [ :echo, audit_tags(**details).except(:version, :service_version).to_s, line ],
+      [ :echo, audit_tags(**details).except(:version, :service_version, :service).to_s, line ],
       audit_log_file
   end
 

lib/kamal/commands/builder.rb

@@ -2,7 +2,7 @@ require "active_support/core_ext/string/filters"
 
 class Kamal::Commands::Builder < Kamal::Commands::Base
   delegate :create, :remove, :push, :clean, :pull, :info, :context_hosts, :config_context_hosts, :validate_image,
-    to: :target
+           :first_mirror, to: :target
 
   include Clone
 

lib/kamal/commands/builder/base.rb

@@ -40,6 +40,10 @@ class Kamal::Commands::Builder::Base < Kamal::Commands::Base
     []
   end
 
+  def first_mirror
+    docker(:info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
+  end
+
   private
     def build_tags
       [ "-t", config.absolute_image, "-t", config.latest_image ]

lib/kamal/configuration.rb

@@ -47,7 +47,7 @@ class Kamal::Configuration
     @destination = destination
     @declared_version = version
 
-    validate! raw_config, example: validation_yml.symbolize_keys, context: ""
+    validate! raw_config, example: validation_yml.symbolize_keys, context: "", with: Kamal::Configuration::Validator::Configuration
 
     # Eager load config to validate it, these are first as they have dependencies later on
     @servers = Servers.new(config: self)

lib/kamal/configuration/docs/configuration.yml

@@ -2,13 +2,24 @@
 #
 # Configuration is read from the `config/deploy.yml`
 #
+
+# Destinations
+#
 # When running commands, you can specify a destination with the `-d` flag,
 # e.g. `kamal deploy -d staging`
 #
 # In this case the configuration will also be read from `config/deploy.staging.yml`
 # and merged with the base configuration.
+
+# Extensions
 #
-# The available configuration options are explained below.
+# Kamal will not accept unrecognized keys in the configuration file.
+#
+# However, you might want to declare a configuration block using YAML anchors
+# and aliases to avoid repetition.
+#
+# You can use prefix a configuration section with `x-` to indicate that it is an
+# extension. Kamal will ignore the extension and not raise an error.
 
 # The service name
 # This is a required value. It is used as the container name prefix.

lib/kamal/configuration/docs/ssh.yml

@@ -44,3 +44,23 @@ ssh:
   # Defaults to `fatal`. Set this to debug if you are having
   # SSH connection issues.
   log_level: debug
+
+  # Keys Only
+  #
+  # Set to true to use only private keys from keys and key_data parameters, 
+  # even if ssh-agent offers more identities. This option is intended for 
+  # situations where ssh-agent offers many different identites or you have 
+  # a need to overwrite all identites and force a single one.
+  keys_only: false
+
+  # Keys
+  #
+  # An array of file names of private keys to use for publickey
+  # and hostbased authentication
+  keys: [ "~/.ssh/id.pem" ]
+
+  # Key Data
+  #
+  # An array of strings, with each element of the array being
+  # a raw private key in PEM format.
+  key_data: [ "-----BEGIN OPENSSH PRIVATE KEY-----" ]

lib/kamal/configuration/ssh.rb

@@ -26,8 +26,20 @@ class Kamal::Configuration::Ssh
     end
   end
 
+  def keys_only
+    ssh_config["keys_only"]
+  end
+
+  def keys
+    ssh_config["keys"]
+  end
+
+  def key_data
+    ssh_config["key_data"]
+  end
+
   def options
-    { user: user, port: port, proxy: proxy, logger: logger, keepalive: true, keepalive_interval: 30 }.compact
+    { user: user, port: port, proxy: proxy, logger: logger, keepalive: true, keepalive_interval: 30, keys_only: keys_only, keys: keys, key_data: key_data }.compact
   end
 
   def to_h

lib/kamal/configuration/validator.rb

@@ -15,11 +15,10 @@ class Kamal::Configuration::Validator
     def validate_against_example!(validation_config, example)
       validate_type! validation_config, Hash
 
-      if (unknown_keys = validation_config.keys - example.keys).any?
+      check_unknown_keys! validation_config, example
-        unknown_keys_error unknown_keys
-      end
 
       validation_config.each do |key, value|
+        next if extension?(key)
         with_context(key) do
           example_value = example[key]
 
@@ -31,9 +30,9 @@ class Kamal::Configuration::Validator
             validate_array_of! value, example_value.first.class
           elsif example_value.is_a?(Hash)
             case key.to_s
-            when "options"
+            when "options", "args"
               validate_type! value, Hash
-            when "args", "labels"
+            when "labels"
               validate_hash_of! value, example_value.first[1].class
             else
               validate_against_example! value, example_value
@@ -137,4 +136,18 @@ class Kamal::Configuration::Validator
     ensure
       @context = old_context
     end
+
+    def allow_extensions?
+      false
+    end
+
+    def extension?(key)
+      key.to_s.start_with?("x-")
+    end
+
+    def check_unknown_keys!(config, example)
+      unknown_keys = config.keys - example.keys
+      unknown_keys.reject! { |key| extension?(key) } if allow_extensions?
+      unknown_keys_error unknown_keys if unknown_keys.present?
+    end
 end

lib/kamal/configuration/validator/configuration.rb

@@ -0,0 +1,6 @@
+class Kamal::Configuration::Validator::Configuration < Kamal::Configuration::Validator
+  private
+    def allow_extensions?
+      true
+    end
+end

lib/kamal/git.rb

@@ -9,6 +9,10 @@ module Kamal::Git
     `git config user.name`.strip
   end
 
+  def email
+    `git config user.email`.strip
+  end
+
   def revision
     `git rev-parse HEAD`.strip
   end

lib/kamal/tags.rb

@@ -10,10 +10,11 @@ class Kamal::Tags
 
     def default_tags(config)
       { recorded_at: Time.now.utc.iso8601,
-        performer: `whoami`.chomp,
+        performer: Kamal::Git.email.presence || `whoami`.chomp,
         destination: config.destination,
         version: config.version,
-        service_version: service_version(config) }
+        service_version: service_version(config),
+        service: config.service }
     end
 
     def service_version(config)

lib/kamal/version.rb

@@ -1,3 +1,3 @@
 module Kamal
-  VERSION = "1.7.2"
+  VERSION = "1.8.1"
 end

test/cli/build_test.rb

@@ -169,12 +169,41 @@ class CliBuildTest < CliTestCase
 
   test "pull" do
     run_command("pull").tap do |output|
+      assert_match /docker info --format '{{index .RegistryConfig.Mirrors 0}}'/, output
       assert_match /docker image rm --force dhh\/app:999/, output
       assert_match /docker pull dhh\/app:999/, output
       assert_match "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1)", output
     end
   end
 
+  test "pull with mirror" do
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
+      .returns("registry-mirror.example.com")
+      .at_least_once
+
+    run_command("pull").tap do |output|
+      assert_match /Pulling image on 1\.1\.1\.\d to seed the mirror\.\.\./, output
+      assert_match "Pulling image on remaining hosts...", output
+      assert_equal 4, output.scan(/docker pull dhh\/app:999/).size, output
+      assert_match "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1)", output
+    end
+  end
+
+  test "pull with mirrors" do
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
+      .returns("registry-mirror.example.com", "registry-mirror2.example.com")
+      .at_least_once
+
+    run_command("pull").tap do |output|
+      assert_match /Pulling image on 1\.1\.1\.\d, 1\.1\.1\.\d to seed the mirrors\.\.\./, output
+      assert_match "Pulling image on remaining hosts...", output
+      assert_equal 4, output.scan(/docker pull dhh\/app:999/).size, output
+      assert_match "docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1)", output
+    end
+  end
+
   test "create" do
     run_command("create").tap do |output|
       assert_match /docker buildx create --use --name kamal-app-multiarch/, output

test/cli/cli_test_case.rb

@@ -42,16 +42,19 @@ class CliTestCase < ActiveSupport::TestCase
     end
 
     def assert_hook_ran(hook, output, version:, service_version:, hosts:, command:, subcommand: nil, runtime: false)
-      performer = `whoami`.strip
+      whoami = `whoami`.chomp
+      performer = Kamal::Git.email.presence || whoami
+      service = service_version.split("@").first
 
       assert_match "Running the #{hook} hook...\n", output
 
-      expected = %r{Running\s/usr/bin/env\s\.kamal/hooks/#{hook}\sas\s#{performer}@localhost\n\s
+      expected = %r{Running\s/usr/bin/env\s\.kamal/hooks/#{hook}\sas\s#{whoami}@localhost\n\s
         DEBUG\s\[[0-9a-f]*\]\sCommand:\s\(\sexport\s
         KAMAL_RECORDED_AT=\"\d\d\d\d-\d\d-\d\dT\d\d:\d\d:\d\dZ\"\s
         KAMAL_PERFORMER=\"#{performer}\"\s
         KAMAL_VERSION=\"#{version}\"\s
         KAMAL_SERVICE_VERSION=\"#{service_version}\"\s
+        KAMAL_SERVICE=\"#{service}\"\s
         KAMAL_HOSTS=\"#{hosts}\"\s
         KAMAL_COMMAND=\"#{command}\"\s
         #{"KAMAL_SUBCOMMAND=\\\"#{subcommand}\\\"\\s" if subcommand}

test/cli/main_test.rb

@@ -1,6 +1,9 @@
 require_relative "cli_test_case"
 
 class CliMainTest < CliTestCase
+  setup { @original_env = ENV.to_h.dup }
+  teardown { ENV.clear; ENV.update @original_env }
+
   test "setup" do
     invoke_options = { "config_file" => "test/fixtures/deploy_simple.yml", "version" => "999", "skip_hooks" => false }
 
@@ -122,6 +125,11 @@ class CliMainTest < CliTestCase
       .with(:docker, :buildx, :inspect, "kamal-app-multiarch", "> /dev/null")
       .returns("")
 
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
+      .returns("")
+      .at_least_once
+
     assert_raises(Kamal::Cli::LockError) do
       run_command("deploy")
     end
@@ -155,6 +163,11 @@ class CliMainTest < CliTestCase
       .with(:docker, :buildx, :inspect, "kamal-app-multiarch", "> /dev/null")
       .returns("")
 
+    SSHKit::Backend::Abstract.any_instance.expects(:capture_with_info)
+      .with(:docker, :info, "--format '{{index .RegistryConfig.Mirrors 0}}'")
+      .returns("")
+      .at_least_once
+
     assert_raises(SSHKit::Runner::ExecuteError) do
       run_command("deploy")
     end
@@ -434,9 +447,9 @@ class CliMainTest < CliTestCase
   end
 
   test "envify" do
-    with_test_dot_env_erb(contents: "HELLO=<%= 'world' %>") do
+    with_test_env_files("env.erb": "HELLO=<%= 'world' %>") do
       run_command("envify")
-      assert_equal("HELLO=world", File.read(".env"))
+      assert_equal("HELLO=world", File.read(".kamal/env"))
     end
   end
 
@@ -448,28 +461,35 @@ class CliMainTest < CliTestCase
       <% end  -%>
     EOF
 
-    with_test_dot_env_erb(contents: file) do
+    with_test_env_files("env.erb": file) do
       run_command("envify")
-      assert_equal("HELLO=world\nKEY=value\n", File.read(".env"))
+      assert_equal("HELLO=world\nKEY=value\n", File.read(".kamal/env"))
     end
   end
 
   test "envify with destination" do
-    with_test_dot_env_erb(contents: "HELLO=<%= 'world' %>", file: ".env.world.erb") do
+    with_test_env_files("env.world.erb": "HELLO=<%= 'world' %>") do
       run_command("envify", "-d", "world", config_file: "deploy_for_dest")
-      assert_equal "HELLO=world", File.read(".env.world")
+      assert_equal "HELLO=world", File.read(".kamal/env.world")
     end
   end
 
   test "envify with skip_push" do
-    Pathname.any_instance.expects(:exist?).returns(true).times(1)
+    Pathname.any_instance.expects(:exist?).returns(true).times(2)
-    File.expects(:read).with(".env.erb").returns("HELLO=<%= 'world' %>")
+    File.expects(:read).with(".kamal/env.erb").returns("HELLO=<%= 'world' %>")
-    File.expects(:write).with(".env", "HELLO=world", perm: 0600)
+    File.expects(:write).with(".kamal/env", "HELLO=world", perm: 0600)
 
     Kamal::Cli::Main.any_instance.expects(:invoke).with("kamal:cli:env:push").never
     run_command("envify", "--skip-push")
   end
 
+  test "envify with clean env" do
+    with_test_env_files("env": "HELLO=already", "env.erb": "HELLO=<%= ENV.fetch 'HELLO', 'never' %>") do
+      run_command("envify", "--skip-push")
+      assert_equal "HELLO=never", File.read(".kamal/env")
+    end
+  end
+
   test "remove with confirmation" do
     run_command("remove", "-y", config_file: "deploy_with_accessories").tap do |output|
       assert_match /docker container stop traefik/, output
@@ -522,14 +542,19 @@ class CliMainTest < CliTestCase
       stdouted { Kamal::Cli::Main.start([ *command, "-c", "test/fixtures/#{config_file}.yml" ]) }
     end
 
-    def with_test_dot_env_erb(contents:, file: ".env.erb")
+    def with_test_env_files(**files)
       Dir.mktmpdir do |dir|
         fixtures_dup = File.join(dir, "test")
         FileUtils.mkdir_p(fixtures_dup)
         FileUtils.cp_r("test/fixtures/", fixtures_dup)
 
         Dir.chdir(dir) do
-          File.write(file, contents)
+          FileUtils.mkdir_p(".kamal")
+          Dir.chdir(".kamal") do
+            files.each do |filename, contents|
+              File.binwrite(filename.to_s, contents)
+            end
+          end
           yield
         end
       end

test/commands/auditor_test.rb

@@ -12,7 +12,7 @@ class CommandsAuditorTest < ActiveSupport::TestCase
     }
 
     @auditor = new_command
-    @performer = `whoami`.strip
+    @performer = Kamal::Git.email.presence || `whoami`.chomp
     @recorded_at = Time.now.utc.iso8601
   end
 

test/commands/builder_test.rb

@@ -200,6 +200,11 @@ class CommandsBuilderTest < ActiveSupport::TestCase
     assert_equal [ "unix:///var/run/docker.sock", "ssh://host" ], command.config_context_hosts
   end
 
+  test "mirror count" do
+    command = new_builder_command
+    assert_equal "docker info --format '{{index .RegistryConfig.Mirrors 0}}'", command.first_mirror.join(" ")
+  end
+
   private
     def new_builder_command(additional_config = {})
       Kamal::Commands::Builder.new(Kamal::Configuration.new(@config.merge(additional_config), version: "123"))

test/commands/hook_test.rb

@@ -11,7 +11,7 @@ class CommandsHookTest < ActiveSupport::TestCase
       traefik: { "args" => { "accesslog.format" => "json", "metrics.prometheus.buckets" => "0.1,0.3,1.2,5.0" } }
     }
 
-    @performer = `whoami`.strip
+    @performer = Kamal::Git.email.presence || `whoami`.chomp
     @recorded_at = Time.now.utc.iso8601
   end
 
@@ -22,7 +22,8 @@ class CommandsHookTest < ActiveSupport::TestCase
         "KAMAL_RECORDED_AT" => @recorded_at,
         "KAMAL_PERFORMER" => @performer,
         "KAMAL_VERSION" => "123",
-        "KAMAL_SERVICE_VERSION" => "app@123" } }
+        "KAMAL_SERVICE_VERSION" => "app@123",
+        "KAMAL_SERVICE" => "app" } }
     ], new_command.run("foo")
   end
 
@@ -33,7 +34,8 @@ class CommandsHookTest < ActiveSupport::TestCase
         "KAMAL_RECORDED_AT" => @recorded_at,
         "KAMAL_PERFORMER" => @performer,
         "KAMAL_VERSION" => "123",
-        "KAMAL_SERVICE_VERSION" => "app@123" } }
+        "KAMAL_SERVICE_VERSION" => "app@123",
+        "KAMAL_SERVICE" => "app" } }
     ], new_command(hooks_path: "custom/hooks/path").run("foo")
   end
 

test/commands/traefik_test.rb

@@ -111,6 +111,11 @@ class CommandsTraefikTest < ActiveSupport::TestCase
       new_command.run.join(" ")
   end
 
+  test "run with args array" do
+    @config[:traefik]["args"] = { "entrypoints.web.forwardedheaders.trustedips" => %w[ 127.0.0.1 127.0.0.2 ] }
+    assert_equal "docker run --name traefik --detach --restart unless-stopped --publish 80:80 --volume /var/run/docker.sock:/var/run/docker.sock --env-file .kamal/env/traefik/traefik.env --log-opt max-size=\"10m\" --label traefik.http.routers.catchall.entryPoints=\"http\" --label traefik.http.routers.catchall.rule=\"PathPrefix(\\`/\\`)\" --label traefik.http.routers.catchall.service=\"unavailable\" --label traefik.http.routers.catchall.priority=\"1\" --label traefik.http.services.unavailable.loadbalancer.server.port=\"0\" traefik:test --providers.docker --log.level=\"DEBUG\" --entrypoints.web.forwardedheaders.trustedips=\"127.0.0.1\" --entrypoints.web.forwardedheaders.trustedips=\"127.0.0.2\"", new_command.run.join(" ")
+  end
+
   test "traefik start" do
     assert_equal \
       "docker container start traefik",

test/configuration/validation_test.rb

@@ -94,7 +94,7 @@ class ConfigurationValidationTest < ActiveSupport::TestCase
     assert_error "builder/remote: unknown key: foo", builder: { "remote" => { "foo" => "bar" } }
     assert_error "builder/local: unknown key: foo", builder: { "local" => { "foo" => "bar" } }
     assert_error "builder/remote/arch: should be a string", builder: { "remote" => { "arch" => [] } }
-    assert_error "builder/args/foo: should be a string", builder: { "args" => { "foo" => [] } }
+    assert_error "builder/args: should be a hash", builder: { "args" => [ "foo" ] }
     assert_error "builder/cache/options: should be a string", builder: { "cache" => { "options" => [] } }
   end
 

test/configuration_test.rb

@@ -344,4 +344,12 @@ class ConfigurationTest < ActiveSupport::TestCase
 
     assert_raises(Kamal::ConfigurationError) { Kamal::Configuration.new(@deploy_with_roles.merge(retain_containers: 0)) }
   end
+
+  test "extensions" do
+    dest_config_file = Pathname.new(File.expand_path("fixtures/deploy_with_extensions.yml", __dir__))
+
+    config = Kamal::Configuration.create_from config_file: dest_config_file
+    assert_equal config.role(:web_tokyo).running_traefik?, true
+    assert_equal config.role(:web_chicago).running_traefik?, true
+  end
 end

test/fixtures/deploy_with_extensions.yml

@@ -0,0 +1,24 @@
+
+x-web: &web
+  traefik: true
+
+service: app
+image: dhh/app
+servers:
+  web_chicago:
+    <<: *web
+    hosts:
+      - 1.1.1.1
+      - 1.1.1.2
+  web_tokyo:
+    <<: *web
+    hosts:
+      - 1.1.1.3
+      - 1.1.1.4
+env:
+  REDIS_URL: redis://x/y
+registry:
+  server: registry.digitalocean.com
+  username: user
+  password: pw
+primary_role: web_tokyo

test/integration/docker-compose.yml

@@ -1,4 +1,3 @@
-version: "3.7"
 name: "kamal-test"
 
 volumes:

test/integration/main_test.rb

@@ -97,7 +97,7 @@ class MainTest < IntegrationTest
 
   private
     def assert_local_env_file(contents)
-      assert_equal contents, deployer_exec("cat .env", capture: true)
+      assert_equal contents, deployer_exec("cat .kamal/env", capture: true)
     end
 
     def assert_envs(version:)
@@ -127,7 +127,7 @@ class MainTest < IntegrationTest
     end
 
     def remove_local_env_file
-      deployer_exec("rm .env")
+      deployer_exec("rm .kamal/env")
     end
 
     def assert_remote_env_file(contents, vm:)