Merge pull request #337 from igor-alexandrov/feature/cache

Support for Docker multistage build cache

lib/mrsk/commands/builder.rb

@@ -7,11 +7,13 @@ class Mrsk::Commands::Builder < Mrsk::Commands::Base
 
   def target
     case
-    when config.builder && config.builder["multiarch"] == false
+    when !config.builder.multiarch? && !config.builder.cached?
       native
-    when config.builder && config.builder["local"] && config.builder["remote"]
+    when !config.builder.multiarch? && config.builder.cached?
+      native_cached
+    when config.builder.local? && config.builder.remote?
       multiarch_remote
-    when config.builder && config.builder["remote"]
+    when config.builder.remote?
       native_remote
     else
       multiarch
@@ -22,6 +24,10 @@ class Mrsk::Commands::Builder < Mrsk::Commands::Base
     @native ||= Mrsk::Commands::Builder::Native.new(config)
   end
 
+  def native_cached
+    @native ||= Mrsk::Commands::Builder::Native::Cached.new(config)
+  end
+
   def native_remote
     @native ||= Mrsk::Commands::Builder::Native::Remote.new(config)
   end

lib/mrsk/commands/builder/base.rb

@@ -3,6 +3,7 @@ class Mrsk::Commands::Builder::Base < Mrsk::Commands::Base
   class BuilderError < StandardError; end
 
   delegate :argumentize, to: Mrsk::Utils
+  delegate :args, :secrets, :dockerfile, :local_arch, :local_host, :remote_arch, :remote_host, :cache_from, :cache_to, to: :builder_config
 
   def clean
     docker :image, :rm, "--force", config.absolute_image
@@ -13,11 +14,11 @@ class Mrsk::Commands::Builder::Base < Mrsk::Commands::Base
   end
 
   def build_options
-    [ *build_tags, *build_labels, *build_args, *build_secrets, *build_dockerfile ]
+    [ *build_tags, *build_cache, *build_labels, *build_args, *build_secrets, *build_dockerfile ]
   end
 
   def build_context
-    context
+    config.builder.context
   end
 
 
@@ -26,6 +27,13 @@ class Mrsk::Commands::Builder::Base < Mrsk::Commands::Base
       [ "-t", config.absolute_image, "-t", config.latest_image ]
     end
 
+    def build_cache
+      if cache_to && cache_from
+        ["--cache-to", cache_to,
+          "--cache-from", cache_from]
+      end
+    end
+
     def build_labels
       argumentize "--label", { service: config.service }
     end
@@ -46,19 +54,7 @@ class Mrsk::Commands::Builder::Base < Mrsk::Commands::Base
       end
     end
 
-    def args
-      (config.builder && config.builder["args"]) || {}
-    end
-
-    def secrets
-      (config.builder && config.builder["secrets"]) || []
-    end
-
-    def dockerfile
-      (config.builder && config.builder["dockerfile"]) || "Dockerfile"
-    end
-
-    def context
-      (config.builder && config.builder["context"]) || "."
+    def builder_config
+      config.builder
     end
 end

lib/mrsk/commands/builder/multiarch/remote.rb

@@ -22,17 +22,17 @@ class Mrsk::Commands::Builder::Multiarch::Remote < Mrsk::Commands::Builder::Mult
     end
 
     def create_local_buildx
-      docker :buildx, :create, "--name", builder_name, builder_name_with_arch(local["arch"]), "--platform", "linux/#{local["arch"]}"
+      docker :buildx, :create, "--name", builder_name, builder_name_with_arch(local_arch), "--platform", "linux/#{local_arch}"
     end
 
     def append_remote_buildx
-      docker :buildx, :create, "--append", "--name", builder_name, builder_name_with_arch(remote["arch"]), "--platform", "linux/#{remote["arch"]}"
+      docker :buildx, :create, "--append", "--name", builder_name, builder_name_with_arch(remote_arch), "--platform", "linux/#{remote_arch}"
     end
 
     def create_contexts
       combine \
-        create_context(local["arch"], local["host"]),
-        create_context(remote["arch"], remote["host"])
+        create_context(local_arch, local_host),
+        create_context(remote_arch, remote_host)
     end
 
     def create_context(arch, host)
@@ -41,19 +41,11 @@ class Mrsk::Commands::Builder::Multiarch::Remote < Mrsk::Commands::Builder::Mult
 
     def remove_contexts
       combine \
-        remove_context(local["arch"]),
-        remove_context(remote["arch"])
+        remove_context(local_arch),
+        remove_context(remote_arch)
     end
 
     def remove_context(arch)
       docker :context, :rm, builder_name_with_arch(arch)
     end
-
-    def local
-      config.builder["local"]
-    end
-
-    def remote
-      config.builder["remote"]
-    end
 end

lib/mrsk/commands/builder/native.rb

@@ -1,10 +1,10 @@
 class Mrsk::Commands::Builder::Native < Mrsk::Commands::Builder::Base
   def create
-    # No-op on native
+    # No-op on native without cache
   end
 
   def remove
-    # No-op on native
+    # No-op on native without cache
   end
 
   def push

lib/mrsk/commands/builder/native/cached.rb

@@ -0,0 +1,16 @@
+class Mrsk::Commands::Builder::Native::Cached < Mrsk::Commands::Builder::Native
+  def create
+    docker :buildx, :create, "--use", "--driver=docker-container"
+  end
+
+  def remove
+    docker :buildx, :rm, builder_name
+  end
+
+  def push
+    docker :buildx, :build,
+      "--push",
+      *build_options,
+      build_context
+  end
+end

lib/mrsk/commands/builder/native/remote.rb

@@ -28,29 +28,21 @@ class Mrsk::Commands::Builder::Native::Remote < Mrsk::Commands::Builder::Native
 
 
   private
-    def arch
-      config.builder["remote"]["arch"]
-    end
-
-    def host
-      config.builder["remote"]["host"]
-    end
-
     def builder_name
       "mrsk-#{config.service}-native-remote"
     end
 
     def builder_name_with_arch
-      "#{builder_name}-#{arch}"
+      "#{builder_name}-#{remote_arch}"
     end
 
     def platform
-      "linux/#{arch}"
+      "linux/#{remote_arch}"
     end
 
     def create_context
       docker :context, :create,
-        builder_name_with_arch, "--description", "'#{builder_name} #{arch} native host'", "--docker", "'host=#{host}'"
+        builder_name_with_arch, "--description", "'#{builder_name} #{remote_arch} native host'", "--docker", "'host=#{remote_host}'"
     end
 
     def remove_context