fix(helm): add warnings for missing chart dependencies

When 'helm install', 'helm package', and 'helm upgrade' are run,
Helm will not issue any warnings if any dependencies listed in
a chart's requirements.yaml file are missing.  This change includes
warnings when a chart is found in requirements.yaml but isn't
in charts/.

Closes #1567

cmd/helm/install.go

@@ -35,8 +35,10 @@ import (
 	"k8s.io/helm/cmd/helm/downloader"
 	"k8s.io/helm/cmd/helm/helmpath"
 	"k8s.io/helm/cmd/helm/strvals"
+	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/helm"
 	"k8s.io/helm/pkg/kube"
+	"k8s.io/helm/pkg/proto/hapi/chart"
 	"k8s.io/helm/pkg/proto/hapi/release"
 )
 
@@ -199,6 +201,13 @@ func (i *installCmd) run() error {
 		fmt.Printf("FINAL NAME: %s\n", i.name)
 	}
 
+	// Check chart requirements to make sure all dependencies are present in /charts
+	if c, err := chartutil.Load(i.chartPath); err == nil {
+		if req, err := chartutil.LoadRequirements(c); err == nil {
+			checkDependencies(c, req, i.out)
+		}
+	}
+
 	res, err := i.client.InstallRelease(
 		i.chartPath,
 		i.namespace,
@@ -388,3 +397,19 @@ func defaultNamespace() string {
 	}
 	return "default"
 }
+
+func checkDependencies(ch *chart.Chart, reqs *chartutil.Requirements, out io.Writer) {
+	deps := ch.GetDependencies()
+	for _, r := range reqs.Dependencies {
+		found := false
+		for _, d := range deps {
+			if d.Metadata.Name == r.Name {
+				found = true
+				break
+			}
+		}
+		if !found {
+			fmt.Fprintf(out, "Warning: %s is in requirements.yaml but not in the charts/ directory!\n", r.Name)
+		}
+	}
+}

cmd/helm/install_test.go

@@ -132,6 +132,12 @@ func TestInstall(t *testing.T) {
 			args:  []string{"testdata/testcharts/signtest-0.1.0.tgz"},
 			flags: strings.Split("--verify --keyring testdata/helm-test-key.pub", " "),
 		},
+		// Install, chart with missing dependencies in /charts
+		{
+			name:     "install chart with missing dependencies",
+			args:     []string{"testdata/testcharts/chart-missing-deps"},
+			expected: "Warning: reqsubchart2 is in requirements.yaml but not in the charts/ directory!",
+		},
 	}
 
 	runReleaseCases(t, tests, func(c *fakeReleaseClient, out io.Writer) *cobra.Command {

cmd/helm/package.go

@@ -125,6 +125,10 @@ func (p *packageCmd) run(cmd *cobra.Command, args []string) error {
 		return fmt.Errorf("directory name (%s) and Chart.yaml name (%s) must match", filepath.Base(path), ch.Metadata.Name)
 	}
 
+	if reqs, err := chartutil.LoadRequirements(ch); err == nil {
+		checkDependencies(ch, reqs, p.out)
+	}
+
 	// Save to the current working directory.
 	cwd, err := os.Getwd()
 	if err != nil {

cmd/helm/package_test.go

@@ -101,6 +101,12 @@ func TestPackage(t *testing.T) {
 			expect:  "",
 			hasfile: "alpine-0.1.0.tgz",
 		},
+		{
+			name:    "package testdata/testcharts/chart-missing-deps",
+			args:    []string{"testdata/testcharts/chart-missing-deps"},
+			expect:  "Warning: reqsubchart2 is in requirements.yaml but not in the charts/ directory!\n",
+			hasfile: "chart-missing-deps-0.1.0.tgz",
+		},
 	}
 
 	// Because these tests are destructive, we run them in a tempdir.

cmd/helm/testdata/testcharts/chart-missing-deps/.helmignore

+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

cmd/helm/testdata/testcharts/chart-missing-deps/Chart.yaml

+description: A Helm chart for Kubernetes
+name: chart-missing-deps
+version: 0.1.0

cmd/helm/testdata/testcharts/chart-missing-deps/charts/reqsubchart/.helmignore

+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

cmd/helm/testdata/testcharts/chart-missing-deps/charts/reqsubchart/Chart.yaml

+description: A Helm chart for Kubernetes
+name: reqsubchart
+version: 0.1.0

cmd/helm/testdata/testcharts/chart-missing-deps/charts/reqsubchart/values.yaml

+# Default values for reqsubchart.
+# This is a YAML-formatted file.
+# Declare name/value pairs to be passed into your templates.
+# name: value

cmd/helm/testdata/testcharts/chart-missing-deps/requirements.yaml

+dependencies:
+  - name: reqsubchart
+    version: 0.1.0
+    repository: "https://example.com/charts"
+  - name: reqsubchart2
+    version: 0.2.0
+    repository: "https://example.com/charts"

cmd/helm/testdata/testcharts/chart-missing-deps/values.yaml

+# Default values for reqtest.
+# This is a YAML-formatted file.
+# Declare name/value pairs to be passed into your templates.
+# name: value

cmd/helm/upgrade.go

@@ -26,6 +26,7 @@ import (
 	"github.com/spf13/cobra"
 
 	"k8s.io/helm/cmd/helm/strvals"
+	"k8s.io/helm/pkg/chartutil"
 	"k8s.io/helm/pkg/helm"
 	"k8s.io/helm/pkg/storage/driver"
 )
@@ -160,6 +161,13 @@ func (u *upgradeCmd) run() error {
 		return err
 	}
 
+	// Check chart requirements to make sure all dependencies are present in /charts
+	if ch, err := chartutil.Load(chartPath); err == nil {
+		if req, err := chartutil.LoadRequirements(ch); err == nil {
+			checkDependencies(ch, req, u.out)
+		}
+	}
+
 	resp, err := u.client.UpdateRelease(
 		u.release,
 		chartPath,

cmd/helm/upgrade_test.go

@@ -20,6 +20,7 @@ import (
 	"io"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"testing"
 
 	"github.com/spf13/cobra"
@@ -79,6 +80,14 @@ func TestUpgradeCmd(t *testing.T) {
 		t.Errorf("Error loading updated chart: %v", err)
 	}
 
+	originalDepsPath := filepath.Join("testdata/testcharts/reqtest")
+	missingDepsPath := filepath.Join("testdata/testcharts/chart-missing-deps")
+	var ch3 *chart.Chart
+	ch3, err = chartutil.Load(originalDepsPath)
+	if err != nil {
+		t.Errorf("Error loading chart with missing dependencies: %v", err)
+	}
+
 	tests := []releaseCase{
 		{
 			name:     "upgrade a release",
@@ -121,6 +130,12 @@ func TestUpgradeCmd(t *testing.T) {
 			resp:     releaseMock(&releaseOptions{name: "crazy-bunny", version: 2, chart: ch2}),
 			expected: "Release \"crazy-bunny\" has been upgraded. Happy Helming!\n",
 		},
+		{
+			name:     "upgrade a release with missing dependencies",
+			args:     []string{"bonkers-bunny", missingDepsPath},
+			resp:     releaseMock(&releaseOptions{name: "bonkers-bunny", version: 1, chart: ch3}),
+			expected: "Warning: reqsubchart2 is in requirements.yaml but not in the charts/ directory!",
+		},
 	}
 
 	cmd := func(c *fakeReleaseClient, out io.Writer) *cobra.Command {