Improve runner code

cmd/skaffold/app/cmd/build.go

@@ -23,7 +23,6 @@ import (
 
 	"github.com/GoogleContainerTools/skaffold/cmd/skaffold/app/flags"
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/build"
-	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/runner"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
@@ -57,12 +56,7 @@ type BuildOutput struct {
 func runBuild(out io.Writer, filename string) error {
 	ctx := context.Background()
 
-	config, err := readConfiguration(filename)
-	if err != nil {
-		return errors.Wrap(err, "reading configuration")
-	}
-
-	runner, err := runner.NewForConfig(opts, config)
+	runner, config, err := newRunner(filename)
 	if err != nil {
 		return errors.Wrap(err, "creating runner")
 	}

cmd/skaffold/app/cmd/delete.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"io"
 
-	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/runner"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
@@ -42,12 +41,7 @@ func NewCmdDelete(out io.Writer) *cobra.Command {
 func delete(out io.Writer, filename string) error {
 	ctx := context.Background()
 
-	config, err := readConfiguration(filename)
-	if err != nil {
-		return errors.Wrap(err, "reading configuration")
-	}
-
-	runner, err := runner.NewForConfig(opts, config)
+	runner, _, err := newRunner(filename)
 	if err != nil {
 		return errors.Wrap(err, "creating runner")
 	}

cmd/skaffold/app/cmd/deploy.go

@@ -23,7 +23,6 @@ import (
 
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/build"
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/docker"
-	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/runner"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
@@ -51,12 +50,7 @@ func NewCmdDeploy(out io.Writer) *cobra.Command {
 func runDeploy(out io.Writer, filename string) error {
 	ctx := context.Background()
 
-	config, err := readConfiguration(filename)
-	if err != nil {
-		return errors.Wrap(err, "reading configuration")
-	}
-
-	runner, err := runner.NewForConfig(opts, config)
+	runner, _, err := newRunner(filename)
 	if err != nil {
 		return errors.Wrap(err, "creating runner")
 	}

cmd/skaffold/app/cmd/dev.go

@@ -19,9 +19,12 @@ package cmd
 import (
 	"context"
 	"io"
+	"os"
+	"os/signal"
+	"syscall"
 
-	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/runner"
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
 )
 
@@ -41,17 +44,40 @@ func NewCmdDev(out io.Writer) *cobra.Command {
 }
 
 func dev(out io.Writer, filename string) error {
-	ctx := context.Background()
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
 
-	config, err := readConfiguration(filename)
-	if err != nil {
-		return errors.Wrap(err, "reading configuration")
+	if opts.Cleanup {
+		catchCtrlC(cancel)
 	}
 
-	runner, err := runner.NewForConfig(opts, config)
+	runner, config, err := newRunner(filename)
 	if err != nil {
 		return errors.Wrap(err, "creating runner")
 	}
 
-	return runner.Dev(ctx, out, config.Build.Artifacts)
+	built, err := runner.Dev(ctx, out, config.Build.Artifacts)
+
+	if opts.Cleanup && built != nil {
+		// Cleanup only if something was built
+		if err := runner.Cleanup(ctx, out); err != nil {
+			logrus.Warnln("cleanup:", err)
+		}
+	}
+
+	return err
+}
+
+func catchCtrlC(cancel context.CancelFunc) {
+	signals := make(chan os.Signal, 1)
+	signal.Notify(signals, os.Interrupt,
+		syscall.SIGTERM,
+		syscall.SIGINT,
+		syscall.SIGPIPE,
+	)
+
+	go func() {
+		<-signals
+		cancel()
+	}()
 }

cmd/skaffold/app/cmd/run.go

@@ -20,7 +20,6 @@ import (
 	"context"
 	"io"
 
-	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/runner"
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
@@ -44,12 +43,7 @@ func NewCmdRun(out io.Writer) *cobra.Command {
 func run(out io.Writer, filename string) error {
 	ctx := context.Background()
 
-	config, err := readConfiguration(filename)
-	if err != nil {
-		return errors.Wrap(err, "reading configuration")
-	}
-
-	runner, err := runner.NewForConfig(opts, config)
+	runner, config, err := newRunner(filename)
 	if err != nil {
 		return errors.Wrap(err, "creating runner")
 	}

cmd/skaffold/app/cmd/runner.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2018 The Skaffold Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package cmd
+
+import (
+	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/config"
+	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/runner"
+	"github.com/pkg/errors"
+)
+
+// newRunner creates a SkaffoldRunner and returns the SkaffoldConfig associated with it.
+func newRunner(filename string) (*runner.SkaffoldRunner, *config.SkaffoldConfig, error) {
+	config, err := readConfiguration(filename)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "reading configuration")
+	}
+
+	runner, err := runner.NewForConfig(opts, config)
+	if err != nil {
+		return nil, nil, errors.Wrap(err, "creating runner")
+	}
+
+	return runner, config, nil
+}

pkg/skaffold/runner/runner.go

@@ -22,8 +22,6 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
-	"os/signal"
-	"syscall"
 
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/build"
 	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/build/tag"
@@ -45,7 +43,6 @@ type SkaffoldRunner struct {
 	watch.WatcherFactory
 	build.DependencyMapFactory
 
-	opts   *config.SkaffoldOptions
 	builds []build.Build
 }
 
@@ -83,7 +80,6 @@ func NewForConfig(opts *config.SkaffoldOptions, cfg *config.SkaffoldConfig) (*Sk
 		Tagger:               tagger,
 		WatcherFactory:       watch.NewWatcher,
 		DependencyMapFactory: build.NewDependencyMap,
-		opts:                 opts,
 	}, nil
 }
 
@@ -167,33 +163,26 @@ func (r *SkaffoldRunner) Run(ctx context.Context, out io.Writer, artifacts []*v1
 
 // Dev watches for changes and runs the skaffold build and deploy
 // pipeline until interrrupted by the user.
-func (r *SkaffoldRunner) Dev(ctx context.Context, out io.Writer, artifacts []*v1alpha2.Artifact) error {
-	if r.opts.Cleanup {
-		return r.cleanUpOnCtrlC(ctx, out, artifacts)
-	}
-	return r.watchBuildDeploy(ctx, out, artifacts)
-}
-
-func (r *SkaffoldRunner) watchBuildDeploy(ctx context.Context, out io.Writer, artifacts []*v1alpha2.Artifact) error {
+func (r *SkaffoldRunner) Dev(ctx context.Context, out io.Writer, artifacts []*v1alpha2.Artifact) ([]build.Build, error) {
 	depMap, err := r.DependencyMapFactory(artifacts)
 	if err != nil {
-		return errors.Wrap(err, "getting path to dependency map")
+		return nil, errors.Wrap(err, "getting path to dependency map")
 	}
 
 	watcher, err := r.WatcherFactory(depMap.Paths())
 	if err != nil {
-		return errors.Wrap(err, "creating watcher")
+		return nil, errors.Wrap(err, "creating watcher")
 	}
 
 	deployDeps, err := r.Dependencies()
 	if err != nil {
-		return errors.Wrap(err, "getting deploy dependencies")
+		return nil, errors.Wrap(err, "getting deploy dependencies")
 	}
 	logrus.Infof("Deployer dependencies: %s", deployDeps)
 
 	deployWatcher, err := r.WatcherFactory(deployDeps)
 	if err != nil {
-		return errors.Wrap(err, "creating deploy watcher")
+		return nil, errors.Wrap(err, "creating deploy watcher")
 	}
 
 	imageList := kubernetes.NewImageList()
@@ -235,12 +224,12 @@ func (r *SkaffoldRunner) watchBuildDeploy(ctx context.Context, out io.Writer, ar
 	}
 
 	if err := onChange(depMap.Paths()); err != nil {
-		return errors.Wrap(err, "first build")
+		return nil, errors.Wrap(err, "first build")
 	}
 
 	// Start logs
 	if err = logger.Start(ctx); err != nil {
-		return errors.Wrap(err, "starting logger")
+		return r.builds, errors.Wrap(err, "starting logger")
 	}
 
 	// Watch files and rebuild
@@ -252,32 +241,7 @@ func (r *SkaffoldRunner) watchBuildDeploy(ctx context.Context, out io.Writer, ar
 		return deployWatcher.Start(watchCtx, ioutil.Discard, onDeployChange)
 	})
 
-	return g.Wait()
-}
-
-func (r *SkaffoldRunner) cleanUpOnCtrlC(ctx context.Context, out io.Writer, artifacts []*v1alpha2.Artifact) error {
-	ctx, cancel := context.WithCancel(ctx)
-
-	signals := make(chan os.Signal, 1)
-	signal.Notify(signals, os.Interrupt,
-		syscall.SIGTERM,
-		syscall.SIGINT,
-		syscall.SIGPIPE,
-	)
-
-	go func() {
-		<-signals
-		cancel()
-	}()
-
-	errRun := r.watchBuildDeploy(ctx, out, artifacts)
-	// Cleanup only if something was built
-	if r.builds != nil {
-		if err := r.Cleanup(ctx, out); err != nil {
-			logrus.Warnln("cleanup:", err)
-		}
-	}
-	return errRun
+	return r.builds, g.Wait()
 }
 
 func mergeWithPreviousBuilds(builds, previous []build.Build) []build.Build {

pkg/skaffold/runner/runner_test.go

@@ -242,7 +242,6 @@ func TestRun(t *testing.T) {
 			runner := &SkaffoldRunner{
 				Builder:  test.builder,
 				Deployer: test.deployer,
-				opts:     &config.SkaffoldOptions{},
 				Tagger:   &tag.ChecksumTagger{},
 			}
 			err := runner.Run(context.Background(), ioutil.Discard, test.config.Build.Artifacts)
@@ -290,12 +289,11 @@ func TestDev(t *testing.T) {
 			runner := &SkaffoldRunner{
 				Builder:              test.builder,
 				Deployer:             &TestDeployer{},
-				opts:                 &config.SkaffoldOptions{},
 				Tagger:               &tag.ChecksumTagger{},
 				DependencyMapFactory: build.NewDependencyMap,
 				WatcherFactory:       test.watcherFactory,
 			}
-			err := runner.Dev(context.Background(), ioutil.Discard, nil)
+			_, err := runner.Dev(context.Background(), ioutil.Discard, nil)
 
 			testutil.CheckError(t, test.shouldErr, err)
 		})
@@ -318,7 +316,6 @@ func TestBuildAndDeployAllArtifacts(t *testing.T) {
 	}
 
 	runner := &SkaffoldRunner{
-		opts:     &config.SkaffoldOptions{},
 		Builder:  builder,
 		Deployer: deployer,
 		DependencyMapFactory: func(artifacts []*v1alpha2.Artifact) (*build.DependencyMap, error) {
@@ -330,7 +327,7 @@ func TestBuildAndDeployAllArtifacts(t *testing.T) {
 
 	// All artifacts are changed
 	runner.WatcherFactory = NewWatcherFactory(nil, []string{"path1", "path2"})
-	err := runner.Dev(ctx, ioutil.Discard, artifacts)
+	_, err := runner.Dev(ctx, ioutil.Discard, artifacts)
 
 	if err != nil {
 		t.Errorf("Didn't expect an error. Got %s", err)
@@ -344,7 +341,7 @@ func TestBuildAndDeployAllArtifacts(t *testing.T) {
 
 	// Only one is changed
 	runner.WatcherFactory = NewWatcherFactory(nil, []string{"path2"})
-	err = runner.Dev(ctx, ioutil.Discard, artifacts)
+	_, err = runner.Dev(ctx, ioutil.Discard, artifacts)
 
 	if err != nil {
 		t.Errorf("Didn't expect an error. Got %s", err)