From 8ef733ca7d4f0ccafa558545ba604091a20e5833 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Fri, 3 Feb 2017 16:26:34 -0800
Subject: [PATCH 1/9] feat(helm): add conditions and tags

This feature adds the ability to selectively control the loading of charts using entries in top chart's values.
When 'helm install --set tags.mytag=true', charts with that tag will be enabled unless disabled in parent by condition.
When 'helm install --set mychart.enabled=true', charts with that yaml path specified will be enabled.

Closes #1837
---
 _proto/hapi/chart/metadata.proto              |   6 +
 pkg/chartutil/requirements.go                 | 147 ++++++++++++++-
 pkg/chartutil/requirements_test.go            | 173 ++++++++++++++++++
 pkg/chartutil/testdata/subpop/Chart.yaml      |   4 +
 pkg/chartutil/testdata/subpop/README.md       |  18 ++
 .../subpop/charts/subchart1/Chart.yaml        |   4 +
 .../subchart1/charts/subchartA/Chart.yaml     |   4 +
 .../charts/subchartA/templates/service.yaml   |  15 ++
 .../subchart1/charts/subchartA/values.yaml    |  21 +++
 .../subchart1/charts/subchartB/Chart.yaml     |   4 +
 .../charts/subchartB/templates/service.yaml   |  15 ++
 .../subchart1/charts/subchartB/values.yaml    |  21 +++
 .../subpop/charts/subchart1/requirements.yaml |  15 ++
 .../charts/subchart1/templates/service.yaml   |  15 ++
 .../subpop/charts/subchart1/values.yaml       |  21 +++
 .../subpop/charts/subchart2/Chart.yaml        |   4 +
 .../subchart2/charts/subchartB/Chart.yaml     |   4 +
 .../charts/subchartB/templates/service.yaml   |  15 ++
 .../subchart2/charts/subchartB/values.yaml    |  21 +++
 .../subchart2/charts/subchartC/Chart.yaml     |   4 +
 .../charts/subchartC/templates/service.yaml   |  15 ++
 .../subchart2/charts/subchartC/values.yaml    |  21 +++
 .../subpop/charts/subchart2/requirements.yaml |  15 ++
 .../charts/subchart2/templates/service.yaml   |  15 ++
 .../subpop/charts/subchart2/values.yaml       |  21 +++
 .../testdata/subpop/requirements.yaml         |  15 ++
 pkg/chartutil/testdata/subpop/values.yaml     |   7 +
 pkg/chartutil/values.go                       |  39 ++++
 pkg/chartutil/values_test.go                  |  34 ++++
 pkg/helm/client.go                            |  10 +
 pkg/proto/hapi/chart/metadata.pb.go           |  45 +++--
 pkg/resolver/resolver_test.go                 |   2 +-
 32 files changed, 748 insertions(+), 22 deletions(-)
 create mode 100644 pkg/chartutil/testdata/subpop/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/README.md
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/templates/service.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/values.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/templates/service.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/values.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/templates/service.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart1/values.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/templates/service.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/values.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/templates/service.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/values.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/templates/service.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/charts/subchart2/values.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/requirements.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/values.yaml

diff --git a/_proto/hapi/chart/metadata.proto b/_proto/hapi/chart/metadata.proto
index da194e9d3..6a6e7ebdc 100644
--- a/_proto/hapi/chart/metadata.proto
+++ b/_proto/hapi/chart/metadata.proto
@@ -64,4 +64,10 @@ message Metadata {
 
 	// The API Version of this chart.
 	string apiVersion = 10;
+
+	// The condition to check to enable chart
+	string condition = 11;
+
+	// The tags to check to enable chart
+	string tags = 12;
 }
diff --git a/pkg/chartutil/requirements.go b/pkg/chartutil/requirements.go
index 8871edbb8..551430404 100644
--- a/pkg/chartutil/requirements.go
+++ b/pkg/chartutil/requirements.go
@@ -17,10 +17,11 @@ package chartutil
 
 import (
 	"errors"
+	"log"
+	"strings"
 	"time"
 
 	"github.com/ghodss/yaml"
-
 	"k8s.io/helm/pkg/proto/hapi/chart"
 )
 
@@ -55,8 +56,17 @@ type Dependency struct {
 	// Appending `index.yaml` to this string should result in a URL that can be
 	// used to fetch the repository index.
 	Repository string `json:"repository"`
+	// A yaml path that resolves to a boolean, used for enabling/disabling charts (e.g. subchart1.enabled )
+	Condition string `json:"condition"`
+	// Tags can be used to group charts for enabling/disabling together
+	Tags []string `json:"tags"`
+	// Enabled bool determines if chart should be loaded
+	Enabled bool `json:"enabled"`
 }
 
+// ErrNoRequirementsFile to detect error condition
+type ErrNoRequirementsFile error
+
 // Requirements is a list of requirements for a chart.
 //
 // Requirements are charts upon which this chart depends. This expresses
@@ -106,3 +116,138 @@ func LoadRequirementsLock(c *chart.Chart) (*RequirementsLock, error) {
 	r := &RequirementsLock{}
 	return r, yaml.Unmarshal(data, r)
 }
+
+// ProcessRequirementsConditions disables charts based on condition path value in values
+func ProcessRequirementsConditions(reqs *Requirements, cvals Values) {
+	var cond string
+	var conds []string
+
+	if reqs != nil && len(reqs.Dependencies) > 0 {
+		for _, r := range reqs.Dependencies {
+			var hasTrue, hasFalse bool
+			cond = string(r.Condition)
+			// check for list
+			if len(cond) > 0 {
+				if strings.Contains(cond, ",") {
+					conds = strings.Split(strings.TrimSpace(cond), ",")
+				} else {
+					conds = []string{strings.TrimSpace(cond)}
+				}
+				for _, c := range conds {
+					if len(c) > 0 {
+						// retrieve value
+						vv, err := cvals.PathValue(c)
+						if err == nil {
+							if vv.(bool) {
+								hasTrue = true
+							}
+							if !vv.(bool) {
+								hasFalse = true
+							}
+						} else {
+							if _, ok := err.(ErrNoValue); !ok {
+								// this is a real error
+								log.Printf("Warning: PathValue returned error %v", err)
+							}
+						}
+						if vv != nil {
+							// got first value, break loop
+							break
+						}
+					}
+				}
+				if !hasTrue && hasFalse {
+					r.Enabled = false
+				} else {
+					if hasTrue {
+						r.Enabled = true
+					}
+				}
+			}
+
+		}
+	}
+}
+
+// ProcessRequirementsTags disables charts based on tags in values
+func ProcessRequirementsTags(reqs *Requirements, cvals Values) {
+	vt, err := cvals.Table("tags")
+	if err != nil {
+		return
+
+	}
+	if reqs != nil && len(reqs.Dependencies) > 0 {
+		for _, r := range reqs.Dependencies {
+			if len(r.Tags) > 0 {
+				tags := r.Tags
+
+				var hasTrue, hasFalse bool
+				for _, k := range tags {
+					if b, ok := vt[k]; ok {
+						if b.(bool) {
+							hasTrue = true
+						}
+						if !b.(bool) {
+							hasFalse = true
+						}
+					}
+				}
+				if !hasTrue && hasFalse {
+					r.Enabled = false
+				} else {
+					if hasTrue || !hasTrue && !hasFalse {
+						r.Enabled = true
+					}
+				}
+
+			}
+		}
+	}
+}
+
+// ProcessRequirementsEnabled removes disabled charts from dependencies
+func ProcessRequirementsEnabled(c *chart.Chart, v *chart.Config) error {
+	reqs, err := LoadRequirements(c)
+	if err != nil {
+		return ErrRequirementsNotFound
+	}
+	// set all to true
+	for _, lr := range reqs.Dependencies {
+		lr.Enabled = true
+	}
+	cvals, err := CoalesceValues(c, v)
+	if err != nil {
+		return err
+	}
+	// flag dependencies as enabled/disabled
+	ProcessRequirementsTags(reqs, cvals)
+	ProcessRequirementsConditions(reqs, cvals)
+
+	// make a map of charts to keep
+	rm := map[string]bool{}
+	for _, r := range reqs.Dependencies {
+		if !r.Enabled {
+			// remove disabled chart
+			rm[r.Name] = true
+		}
+	}
+	// don't keep disabled charts in new slice
+	cd := c.Dependencies[:0]
+	for _, n := range c.Dependencies {
+		if _, ok := rm[n.Metadata.Name]; !ok {
+			cd = append(cd, n)
+		}
+
+	}
+	// recursively call self to process sub dependencies
+	for _, t := range cd {
+		err := ProcessRequirementsEnabled(t, v)
+		// if its not just missing requirements file, return error
+		if nerr, ok := err.(ErrNoRequirementsFile); !ok && err != nil {
+			return nerr
+		}
+	}
+	c.Dependencies = cd
+
+	return nil
+}
diff --git a/pkg/chartutil/requirements_test.go b/pkg/chartutil/requirements_test.go
index afcc75621..ff3e895df 100644
--- a/pkg/chartutil/requirements_test.go
+++ b/pkg/chartutil/requirements_test.go
@@ -15,7 +15,10 @@ limitations under the License.
 package chartutil
 
 import (
+	"sort"
 	"testing"
+
+	"k8s.io/helm/pkg/proto/hapi/chart"
 )
 
 func TestLoadRequirements(t *testing.T) {
@@ -33,3 +36,173 @@ func TestLoadRequirementsLock(t *testing.T) {
 	}
 	verifyRequirementsLock(t, c)
 }
+func TestRequirementsTagsNonValue(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags with no effect
+	v := &chart.Config{Raw: string("tags:\n  nothinguseful: false\n\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart1", "subcharta", "subchartb"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsTagsDisabledL1(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags disabling a group
+	v := &chart.Config{Raw: string("tags:\n  front-end: false\n\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsTagsEnabledL1(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags disabling a group and enabling a different group
+	v := &chart.Config{Raw: string("tags:\n  front-end: false\n\n  back-end: true\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart2", "subchartb", "subchartc"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsTagsDisabledL2(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags disabling only children
+	v := &chart.Config{Raw: string("tags:\n  subcharta: false\n\n  subchartb: false\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart1"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsTagsDisabledL1Mixed(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags disabling all parents/children with additional tag re-enabling a parent
+	v := &chart.Config{Raw: string("tags:\n  front-end: false\n\n  subchart1: true\n\n  back-end: false\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart1"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsConditionsNonValue(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags with no effect
+	v := &chart.Config{Raw: string("subchart1:\n  nothinguseful: false\n\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart1", "subcharta", "subchartb"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsConditionsEnabledL1Both(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// conditions enabling the parent charts, effectively enabling children
+	v := &chart.Config{Raw: string("subchart1:\n  enabled: true\nsubchart2:\n  enabled: true\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart1", "subchart2", "subcharta", "subchartb", "subchartb", "subchartc"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsConditionsDisabledL1Both(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// conditions disabling the parent charts, effectively disabling children
+	v := &chart.Config{Raw: string("subchart1:\n  enabled: false\nsubchart2:\n  enabled: false\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+
+func TestRequirementsConditionsSecond(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// conditions a child using the second condition path of child's condition
+	v := &chart.Config{Raw: string("subchart1:\n  subcharta:\n    enabled: false\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart1", "subchartb"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsCombinedDisabledL2(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags enabling a parent/child group with condition disabling one child
+	v := &chart.Config{Raw: string("subchartc:\n  enabled: false\ntags:\n  back-end: true\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart", "subchart1", "subchart2", "subcharta", "subchartb", "subchartb"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+func TestRequirementsCombinedDisabledL1(t *testing.T) {
+	c, err := Load("testdata/subpop")
+	if err != nil {
+		t.Fatalf("Failed to load testdata: %s", err)
+	}
+	// tags will not enable a child if parent is explicitly disabled with condition
+	v := &chart.Config{Raw: string("subchart1:\n  enabled: false\ntags:\n  front-end: true\n")}
+	// expected charts including duplicates in alphanumeric order
+	e := []string{"parentchart"}
+
+	verifyRequirementsEnabled(t, c, v, e)
+}
+
+func verifyRequirementsEnabled(t *testing.T, c *chart.Chart, v *chart.Config, e []string) {
+	out := []*chart.Chart{}
+	err := ProcessRequirementsEnabled(c, v)
+	if err != nil {
+		t.Errorf("Error processing enabled requirements %v", err)
+	}
+	out = extractCharts(c, out)
+	// build list of chart names
+	p := []string{}
+	for _, r := range out {
+		p = append(p, r.Metadata.Name)
+	}
+	//sort alphanumeric and compare to expectations
+	sort.Strings(p)
+	if len(p) != len(e) {
+		t.Errorf("Error slice lengths do not match got %v, expected %v", len(p), len(e))
+		return
+	}
+	for i := range p {
+		if p[i] != e[i] {
+			t.Errorf("Error slice values do not match got %v, expected %v", p[i], e[i])
+		}
+	}
+}
+
+// extractCharts recursively searches chart dependencies returning all charts found
+func extractCharts(c *chart.Chart, out []*chart.Chart) []*chart.Chart {
+
+	if len(c.Metadata.Name) > 0 {
+		out = append(out, c)
+	}
+	for _, d := range c.Dependencies {
+		out = extractCharts(d, out)
+	}
+	return out
+}
diff --git a/pkg/chartutil/testdata/subpop/Chart.yaml b/pkg/chartutil/testdata/subpop/Chart.yaml
new file mode 100644
index 000000000..77bda03b6
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: parentchart
+version: 0.1.0
\ No newline at end of file
diff --git a/pkg/chartutil/testdata/subpop/README.md b/pkg/chartutil/testdata/subpop/README.md
new file mode 100644
index 000000000..e43fbfe9c
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/README.md
@@ -0,0 +1,18 @@
+## Subpop 
+
+This chart is for testing the processing of enabled/disabled charts  
+via conditions and tags.
+
+Currently there are three levels:
+
+````
+parent
+-1 tags: front-end, subchart1
+--A tags: front-end, subchartA
+--B tags: front-end, subchartB
+-2 tags: back-end, subchart2
+--B tags: back-end, subchartB
+--C tags: back-end, subchartC
+````
+
+Tags and conditions are currently in requirements.yaml files.
\ No newline at end of file
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/Chart.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/Chart.yaml
new file mode 100644
index 000000000..f58d82818
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: subchart1
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/Chart.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/Chart.yaml
new file mode 100644
index 000000000..be3edcefb
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: subcharta
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/templates/service.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/templates/service.yaml
new file mode 100644
index 000000000..fdf75aa91
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Chart.Name }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+  - port: {{ .Values.service.externalPort }}
+    targetPort: {{ .Values.service.internalPort }}
+    protocol: TCP
+    name: {{ .Values.service.name }}
+  selector:
+    app: {{ .Chart.Name }}
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/values.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/values.yaml
new file mode 100644
index 000000000..5e5b21065
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartA/values.yaml
@@ -0,0 +1,21 @@
+# Default values for subchart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+replicaCount: 1
+image:
+  repository: nginx
+  tag: stable
+  pullPolicy: IfNotPresent
+service:
+  name: nginx
+  type: ClusterIP
+  externalPort: 80
+  internalPort: 80
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/Chart.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/Chart.yaml
new file mode 100644
index 000000000..c3c6bbaf0
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: subchartb
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/templates/service.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/templates/service.yaml
new file mode 100644
index 000000000..fdf75aa91
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Chart.Name }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+  - port: {{ .Values.service.externalPort }}
+    targetPort: {{ .Values.service.internalPort }}
+    protocol: TCP
+    name: {{ .Values.service.name }}
+  selector:
+    app: {{ .Chart.Name }}
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/values.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/values.yaml
new file mode 100644
index 000000000..5e5b21065
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/charts/subchartB/values.yaml
@@ -0,0 +1,21 @@
+# Default values for subchart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+replicaCount: 1
+image:
+  repository: nginx
+  tag: stable
+  pullPolicy: IfNotPresent
+service:
+  name: nginx
+  type: ClusterIP
+  externalPort: 80
+  internalPort: 80
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml
new file mode 100644
index 000000000..3fa0b8dfb
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml
@@ -0,0 +1,15 @@
+dependencies:
+      - name: subcharta
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subcharta.enabled,subchart1.subcharta.enabled
+        tags:
+          - front-end
+          - subcharta
+      - name: subchartb
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subchartb.enabled
+        tags:
+          - front-end
+          - subchartb
\ No newline at end of file
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/templates/service.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/templates/service.yaml
new file mode 100644
index 000000000..fdf75aa91
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Chart.Name }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+  - port: {{ .Values.service.externalPort }}
+    targetPort: {{ .Values.service.internalPort }}
+    protocol: TCP
+    name: {{ .Values.service.name }}
+  selector:
+    app: {{ .Chart.Name }}
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/values.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/values.yaml
new file mode 100644
index 000000000..5e5b21065
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/values.yaml
@@ -0,0 +1,21 @@
+# Default values for subchart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+replicaCount: 1
+image:
+  repository: nginx
+  tag: stable
+  pullPolicy: IfNotPresent
+service:
+  name: nginx
+  type: ClusterIP
+  externalPort: 80
+  internalPort: 80
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/Chart.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/Chart.yaml
new file mode 100644
index 000000000..2c76b0786
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: subchart2
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/Chart.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/Chart.yaml
new file mode 100644
index 000000000..c3c6bbaf0
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: subchartb
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/templates/service.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/templates/service.yaml
new file mode 100644
index 000000000..0935aadce
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: subchart2-{{ .Chart.Name }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+  - port: {{ .Values.service.externalPort }}
+    targetPort: {{ .Values.service.internalPort }}
+    protocol: TCP
+    name: subchart2-{{ .Values.service.name }}
+  selector:
+    app: {{ .Chart.Name }}
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/values.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/values.yaml
new file mode 100644
index 000000000..5e5b21065
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartB/values.yaml
@@ -0,0 +1,21 @@
+# Default values for subchart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+replicaCount: 1
+image:
+  repository: nginx
+  tag: stable
+  pullPolicy: IfNotPresent
+service:
+  name: nginx
+  type: ClusterIP
+  externalPort: 80
+  internalPort: 80
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/Chart.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/Chart.yaml
new file mode 100644
index 000000000..dcc45c088
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: subchartc
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/templates/service.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/templates/service.yaml
new file mode 100644
index 000000000..fdf75aa91
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Chart.Name }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+  - port: {{ .Values.service.externalPort }}
+    targetPort: {{ .Values.service.internalPort }}
+    protocol: TCP
+    name: {{ .Values.service.name }}
+  selector:
+    app: {{ .Chart.Name }}
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/values.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/values.yaml
new file mode 100644
index 000000000..5e5b21065
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/charts/subchartC/values.yaml
@@ -0,0 +1,21 @@
+# Default values for subchart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+replicaCount: 1
+image:
+  repository: nginx
+  tag: stable
+  pullPolicy: IfNotPresent
+service:
+  name: nginx
+  type: ClusterIP
+  externalPort: 80
+  internalPort: 80
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml
new file mode 100644
index 000000000..b68d1a776
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml
@@ -0,0 +1,15 @@
+dependencies:
+      - name: subchartb
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subchartb.enabled,subchart2.subchartb.enabled
+        tags:
+          - back-end
+          - subchartb
+      - name: subchartc
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subchartc.enabled
+        tags:
+          - back-end
+          - subchartc
\ No newline at end of file
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/templates/service.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/templates/service.yaml
new file mode 100644
index 000000000..fdf75aa91
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Chart.Name }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+  - port: {{ .Values.service.externalPort }}
+    targetPort: {{ .Values.service.internalPort }}
+    protocol: TCP
+    name: {{ .Values.service.name }}
+  selector:
+    app: {{ .Chart.Name }}
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/values.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/values.yaml
new file mode 100644
index 000000000..5e5b21065
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/values.yaml
@@ -0,0 +1,21 @@
+# Default values for subchart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+replicaCount: 1
+image:
+  repository: nginx
+  tag: stable
+  pullPolicy: IfNotPresent
+service:
+  name: nginx
+  type: ClusterIP
+  externalPort: 80
+  internalPort: 80
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
diff --git a/pkg/chartutil/testdata/subpop/requirements.yaml b/pkg/chartutil/testdata/subpop/requirements.yaml
new file mode 100644
index 000000000..5b6b8304e
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/requirements.yaml
@@ -0,0 +1,15 @@
+dependencies:
+      - name: subchart1
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subchart1.enabled
+        tags:
+          - front-end
+          - subchart1
+      - name: subchart2
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subchart2.enabled
+        tags:
+          - back-end
+          - subchart2
\ No newline at end of file
diff --git a/pkg/chartutil/testdata/subpop/values.yaml b/pkg/chartutil/testdata/subpop/values.yaml
new file mode 100644
index 000000000..85fc7b49d
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/values.yaml
@@ -0,0 +1,7 @@
+# parent/values.yaml
+
+# switch-like
+tags:
+  front-end: true
+  back-end: false
+
diff --git a/pkg/chartutil/values.go b/pkg/chartutil/values.go
index 499cb89b0..97dfb993d 100644
--- a/pkg/chartutil/values.go
+++ b/pkg/chartutil/values.go
@@ -31,6 +31,9 @@ import (
 // ErrNoTable indicates that a chart does not have a matching table.
 type ErrNoTable error
 
+// ErrNoValue indicates that Values does not contain a key with a value
+type ErrNoValue error
+
 // GlobalKey is the name of the Values key that is used for storing global vars.
 const GlobalKey = "global"
 
@@ -376,3 +379,39 @@ func istable(v interface{}) bool {
 	_, ok := v.(map[string]interface{})
 	return ok
 }
+
+// PathValue takes a yaml path with . notation and returns the value if exists
+func (v Values) PathValue(ypath string) (interface{}, error) {
+	if len(ypath) == 0 {
+		return nil, error(fmt.Errorf("yaml path string cannot be zero length"))
+	}
+	yps := strings.Split(ypath, ".")
+	if len(ypath) == 1 {
+		// if exists must be root key not table
+		vals := v.AsMap()
+		k := yps[0]
+		if _, ok := vals[k]; ok && !istable(vals[k]) {
+			// key found
+			return vals[yps[0]], nil
+		}
+		// key not found
+		return nil, ErrNoValue(fmt.Errorf("%v is not a value", k))
+	}
+	table := yps[:len(yps)-1]
+	st := strings.Join(table, ".")
+	key := yps[len(yps)-1:]
+	sk := string(key[0])
+
+	t, err := v.Table(st)
+	if err != nil {
+		//no table
+		return nil, ErrNoValue(fmt.Errorf("%v is not a value", sk))
+	}
+	if k, ok := t[sk]; ok && !istable(k) {
+		// key found
+		return k, nil
+	}
+
+	// key not found
+	return nil, ErrNoValue(fmt.Errorf("key not found: %s", sk))
+}
diff --git a/pkg/chartutil/values_test.go b/pkg/chartutil/values_test.go
index 2c519b099..1fe8b5c8b 100644
--- a/pkg/chartutil/values_test.go
+++ b/pkg/chartutil/values_test.go
@@ -407,3 +407,37 @@ func TestCoalesceTables(t *testing.T) {
 		t.Errorf("Expected boat string, got %v", dst["boat"])
 	}
 }
+func TestPathValue(t *testing.T) {
+	doc := `
+title: "Moby Dick"
+chapter:
+  one:
+    title: "Loomings"
+  two:
+    title: "The Carpet-Bag"
+  three:
+    title: "The Spouter Inn"
+`
+	d, err := ReadValues([]byte(doc))
+	if err != nil {
+		t.Fatalf("Failed to parse the White Whale: %s", err)
+	}
+
+	if v, err := d.PathValue("chapter.one.title"); err != nil {
+		t.Errorf("Got error instead of title: %s\n%v", err, d)
+	} else if v != "Loomings" {
+		t.Errorf("No error but got wrong value for title: %s\n%v", err, d)
+	}
+	if _, err := d.PathValue("chapter.one.doesntexist"); err == nil {
+		t.Errorf("Non-existent key should return error: %s\n%v", err, d)
+	}
+	if _, err := d.PathValue("chapter.doesntexist.one"); err == nil {
+		t.Errorf("Non-existent key in middle of path should return error: %s\n%v", err, d)
+	}
+	if v, err := d.PathValue("title"); err == nil {
+		if v != "Moby Dick" {
+			t.Errorf("Failed to return values for root key title")
+		}
+	}
+
+}
diff --git a/pkg/helm/client.go b/pkg/helm/client.go
index c8ade3467..03df61c6d 100644
--- a/pkg/helm/client.go
+++ b/pkg/helm/client.go
@@ -92,6 +92,11 @@ func (h *Client) InstallReleaseFromChart(chart *chart.Chart, ns string, opts ...
 			return nil, err
 		}
 	}
+	err := chartutil.ProcessRequirementsEnabled(req.Chart, req.Values)
+	if err != nil {
+		return nil, err
+	}
+
 	return h.install(ctx, req)
 }
 
@@ -156,6 +161,11 @@ func (h *Client) UpdateReleaseFromChart(rlsName string, chart *chart.Chart, opts
 			return nil, err
 		}
 	}
+	err := chartutil.ProcessRequirementsEnabled(req.Chart, req.Values)
+	if err != nil {
+		return nil, err
+	}
+
 	return h.update(ctx, req)
 }
 
diff --git a/pkg/proto/hapi/chart/metadata.pb.go b/pkg/proto/hapi/chart/metadata.pb.go
index 41e0999f4..322719e3d 100644
--- a/pkg/proto/hapi/chart/metadata.pb.go
+++ b/pkg/proto/hapi/chart/metadata.pb.go
@@ -71,6 +71,10 @@ type Metadata struct {
 	Icon string `protobuf:"bytes,9,opt,name=icon" json:"icon,omitempty"`
 	// The API Version of this chart.
 	ApiVersion string `protobuf:"bytes,10,opt,name=apiVersion" json:"apiVersion,omitempty"`
+	// The condition to check to enable chart
+	Condition string `protobuf:"bytes,11,opt,name=condition" json:"condition,omitempty"`
+	// The tags to check to enable chart
+	Tags []string `protobuf:"bytes,12,opt,name=tags" json:"tags,omitempty"`
 }
 
 func (m *Metadata) Reset()                    { *m = Metadata{} }
@@ -94,24 +98,25 @@ func init() {
 func init() { proto.RegisterFile("hapi/chart/metadata.proto", fileDescriptor2) }
 
 var fileDescriptor2 = []byte{
-	// 290 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x6c, 0x91, 0x4d, 0x4b, 0xf4, 0x30,
-	0x14, 0x85, 0xdf, 0x4e, 0xbf, 0x6f, 0x37, 0xc3, 0xe5, 0x65, 0x88, 0x2e, 0xa4, 0x74, 0xd5, 0x55,
-	0x07, 0x14, 0xc4, 0xb5, 0x20, 0x2e, 0x74, 0x3a, 0x52, 0xfc, 0x00, 0x77, 0xb1, 0x0d, 0x36, 0x68,
-	0x93, 0x92, 0x44, 0xc5, 0xff, 0xe8, 0x8f, 0x92, 0xa6, 0x9d, 0x99, 0x2e, 0xdc, 0xdd, 0x73, 0x9e,
-	0x9e, 0xdb, 0x9c, 0x04, 0x8e, 0x5a, 0xda, 0xf3, 0x75, 0xdd, 0x52, 0x65, 0xd6, 0x1d, 0x33, 0xb4,
-	0xa1, 0x86, 0x16, 0xbd, 0x92, 0x46, 0x22, 0x0c, 0xa8, 0xb0, 0x28, 0x3b, 0x07, 0xd8, 0x50, 0x2e,
-	0x0c, 0xe5, 0x82, 0x29, 0x44, 0xf0, 0x04, 0xed, 0x18, 0x71, 0x52, 0x27, 0x8f, 0x2b, 0x3b, 0xe3,
-	0x7f, 0xf0, 0x59, 0x47, 0xf9, 0x3b, 0x59, 0x58, 0x73, 0x14, 0xd9, 0xcf, 0x02, 0xa2, 0xcd, 0xb4,
-	0xf6, 0xcf, 0x18, 0x82, 0xd7, 0xca, 0x8e, 0x4d, 0x29, 0x3b, 0x23, 0x81, 0x50, 0xcb, 0x0f, 0x55,
-	0x33, 0x4d, 0xdc, 0xd4, 0xcd, 0xe3, 0x6a, 0x27, 0x07, 0xf2, 0xc9, 0x94, 0xe6, 0x52, 0x10, 0xcf,
-	0x06, 0x76, 0x12, 0x53, 0x48, 0x1a, 0xa6, 0x6b, 0xc5, 0x7b, 0x33, 0x50, 0xdf, 0xd2, 0xb9, 0x85,
-	0xc7, 0x10, 0xbd, 0xb1, 0xef, 0x2f, 0xa9, 0x1a, 0x4d, 0x02, 0xbb, 0x76, 0xaf, 0xf1, 0x02, 0x92,
-	0x6e, 0x5f, 0x4f, 0x93, 0x30, 0x75, 0xf3, 0xe4, 0x74, 0x55, 0x1c, 0x2e, 0xa0, 0x38, 0xb4, 0xaf,
-	0xe6, 0x9f, 0xe2, 0x0a, 0x02, 0x26, 0x5e, 0xb9, 0x60, 0x24, 0xb2, 0xbf, 0x9c, 0xd4, 0xd0, 0x8b,
-	0xd7, 0x52, 0x90, 0x78, 0xec, 0x35, 0xcc, 0x78, 0x02, 0x40, 0x7b, 0xfe, 0x38, 0x15, 0x00, 0x4b,
-	0x66, 0x4e, 0x96, 0x42, 0x70, 0x35, 0xa6, 0x13, 0x08, 0x1f, 0xca, 0x9b, 0x72, 0xfb, 0x54, 0x2e,
-	0xff, 0x61, 0x0c, 0xfe, 0xf5, 0xf6, 0xfe, 0xee, 0x76, 0xe9, 0x5c, 0x86, 0xcf, 0xbe, 0x3d, 0xce,
-	0x4b, 0x60, 0x9f, 0xe8, 0xec, 0x37, 0x00, 0x00, 0xff, 0xff, 0x65, 0x86, 0x8b, 0xda, 0xbf, 0x01,
-	0x00, 0x00,
+	// 311 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x09, 0x6e, 0x88, 0x02, 0xff, 0x6c, 0x91, 0xcd, 0x4b, 0xc3, 0x40,
+	0x10, 0xc5, 0xed, 0x47, 0x92, 0x66, 0xe2, 0xa1, 0x0c, 0x52, 0x56, 0x11, 0x09, 0x3d, 0xf5, 0x94,
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+	0x0d, 0xbf, 0x2c, 0x1c, 0x6f, 0x79, 0x25, 0xe7, 0xf9, 0x96, 0x1b, 0x37, 0x2f, 0x85, 0xe3, 0x05,
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+	0x2e, 0x2c, 0x1b, 0xa4, 0x83, 0x59, 0xbc, 0xde, 0x49, 0x9f, 0x7c, 0x09, 0x63, 0xa5, 0x56, 0x6c,
+	0x48, 0x0b, 0x3b, 0x89, 0x29, 0x24, 0x85, 0xb0, 0xb9, 0x91, 0x95, 0xf3, 0x69, 0x40, 0x69, 0xd7,
+	0xc2, 0x13, 0x18, 0xbd, 0x8b, 0x9f, 0x6f, 0x6d, 0x0a, 0xcb, 0x42, 0xaa, 0xdd, 0x6b, 0xbc, 0x82,
+	0xa4, 0xdc, 0xe3, 0x59, 0x16, 0xa5, 0x83, 0x59, 0x72, 0x3e, 0xc9, 0xda, 0x1f, 0x90, 0xb5, 0xf4,
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+	0x8e, 0x83, 0xa7, 0x10, 0xe7, 0x5a, 0x15, 0x92, 0x08, 0x12, 0x8a, 0x5b, 0xc3, 0x37, 0x3a, 0xbe,
+	0xb1, 0xec, 0xb0, 0x6e, 0xf4, 0xf3, 0x34, 0x85, 0xf0, 0xa6, 0xbe, 0x97, 0x40, 0xf4, 0xb4, 0xbc,
+	0x5b, 0xae, 0x5e, 0x96, 0xe3, 0x03, 0x8c, 0x21, 0xb8, 0x5d, 0x3d, 0x3e, 0xdc, 0x8f, 0x7b, 0xd7,
+	0xd1, 0x6b, 0x40, 0x00, 0x6f, 0x21, 0x3d, 0xea, 0xc5, 0x5f, 0x00, 0x00, 0x00, 0xff, 0xff, 0x5a,
+	0xa8, 0xcd, 0xe1, 0xf1, 0x01, 0x00, 0x00,
 }
diff --git a/pkg/resolver/resolver_test.go b/pkg/resolver/resolver_test.go
index 1f5409985..ffc50af4f 100644
--- a/pkg/resolver/resolver_test.go
+++ b/pkg/resolver/resolver_test.go
@@ -119,7 +119,7 @@ func TestResolve(t *testing.T) {
 }
 
 func TestHashReq(t *testing.T) {
-	expect := "sha256:e70e41f8922e19558a8bf62f591a8b70c8e4622e3c03e5415f09aba881f13885"
+	expect := "sha256:c8250374210bd909cef274be64f871bd4e376d4ecd34a1589b5abf90b68866ba"
 	req := &chartutil.Requirements{
 		Dependencies: []*chartutil.Dependency{
 			{Name: "alpine", Version: "0.1.0", Repository: "http://localhost:8879/charts"},

From faae1f68b6c694b506e83796d11f35df20cdef43 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Wed, 8 Feb 2017 09:57:08 -0800
Subject: [PATCH 2/9] feat(helm): Check len of correct slice

---
 pkg/chartutil/values.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkg/chartutil/values.go b/pkg/chartutil/values.go
index 97dfb993d..074c7a97c 100644
--- a/pkg/chartutil/values.go
+++ b/pkg/chartutil/values.go
@@ -386,7 +386,7 @@ func (v Values) PathValue(ypath string) (interface{}, error) {
 		return nil, error(fmt.Errorf("yaml path string cannot be zero length"))
 	}
 	yps := strings.Split(ypath, ".")
-	if len(ypath) == 1 {
+	if len(yps) == 1 {
 		// if exists must be root key not table
 		vals := v.AsMap()
 		k := yps[0]

From 004c5bcc88b649cd5d64c027e66e1bc5494f8cd5 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Wed, 8 Feb 2017 11:36:43 -0800
Subject: [PATCH 3/9] feat(helm): fix condition when no requirements.yaml
 exists during tag/condition processing

---
 pkg/chartutil/requirements.go                 | 10 +++++--
 .../testdata/subpop/noreqs/Chart.yaml         |  4 +++
 .../subpop/noreqs/templates/service.yaml      | 15 +++++++++++
 .../testdata/subpop/noreqs/values.yaml        | 27 +++++++++++++++++++
 4 files changed, 54 insertions(+), 2 deletions(-)
 create mode 100644 pkg/chartutil/testdata/subpop/noreqs/Chart.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/noreqs/templates/service.yaml
 create mode 100644 pkg/chartutil/testdata/subpop/noreqs/values.yaml

diff --git a/pkg/chartutil/requirements.go b/pkg/chartutil/requirements.go
index 551430404..336d0ba61 100644
--- a/pkg/chartutil/requirements.go
+++ b/pkg/chartutil/requirements.go
@@ -209,7 +209,13 @@ func ProcessRequirementsTags(reqs *Requirements, cvals Values) {
 func ProcessRequirementsEnabled(c *chart.Chart, v *chart.Config) error {
 	reqs, err := LoadRequirements(c)
 	if err != nil {
-		return ErrRequirementsNotFound
+		// if not just missing requirements file, return error
+		if nerr, ok := err.(ErrNoRequirementsFile); !ok {
+			return nerr
+		} else {
+			// no requirements to process
+			return nil
+		}
 	}
 	// set all to true
 	for _, lr := range reqs.Dependencies {
@@ -223,7 +229,7 @@ func ProcessRequirementsEnabled(c *chart.Chart, v *chart.Config) error {
 	ProcessRequirementsTags(reqs, cvals)
 	ProcessRequirementsConditions(reqs, cvals)
 
-	// make a map of charts to keep
+	// make a map of charts to remove
 	rm := map[string]bool{}
 	for _, r := range reqs.Dependencies {
 		if !r.Enabled {
diff --git a/pkg/chartutil/testdata/subpop/noreqs/Chart.yaml b/pkg/chartutil/testdata/subpop/noreqs/Chart.yaml
new file mode 100644
index 000000000..77bda03b6
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/noreqs/Chart.yaml
@@ -0,0 +1,4 @@
+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: parentchart
+version: 0.1.0
\ No newline at end of file
diff --git a/pkg/chartutil/testdata/subpop/noreqs/templates/service.yaml b/pkg/chartutil/testdata/subpop/noreqs/templates/service.yaml
new file mode 100644
index 000000000..fdf75aa91
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/noreqs/templates/service.yaml
@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ .Chart.Name }}
+  labels:
+    chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+  - port: {{ .Values.service.externalPort }}
+    targetPort: {{ .Values.service.internalPort }}
+    protocol: TCP
+    name: {{ .Values.service.name }}
+  selector:
+    app: {{ .Chart.Name }}
diff --git a/pkg/chartutil/testdata/subpop/noreqs/values.yaml b/pkg/chartutil/testdata/subpop/noreqs/values.yaml
new file mode 100644
index 000000000..81c18c6b0
--- /dev/null
+++ b/pkg/chartutil/testdata/subpop/noreqs/values.yaml
@@ -0,0 +1,27 @@
+# Default values for subchart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+replicaCount: 1
+image:
+  repository: nginx
+  tag: stable
+  pullPolicy: IfNotPresent
+service:
+  name: nginx
+  type: ClusterIP
+  externalPort: 80
+  internalPort: 80
+resources:
+  limits:
+    cpu: 100m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 128Mi
+
+
+# switch-like
+tags:
+  front-end: true
+  back-end: false
+

From 58c8aca1ccf20a350635172a76e0262057e88992 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Thu, 9 Feb 2017 14:58:35 -0800
Subject: [PATCH 4/9] feat(helm): fixup if/ele,remove extra string casts, add
 comments

---
 pkg/chartutil/requirements.go                 | 119 ++++++++++--------
 pkg/chartutil/requirements_test.go            |  22 ++--
 pkg/chartutil/testdata/subpop/Chart.yaml      |   2 +-
 .../subpop/charts/subchart1/requirements.yaml |   2 +-
 .../subpop/charts/subchart2/requirements.yaml |   2 +-
 .../testdata/subpop/noreqs/Chart.yaml         |   2 +-
 .../testdata/subpop/noreqs/values.yaml        |   1 -
 .../testdata/subpop/requirements.yaml         |   2 +-
 pkg/chartutil/values.go                       |  12 +-
 9 files changed, 88 insertions(+), 76 deletions(-)

diff --git a/pkg/chartutil/requirements.go b/pkg/chartutil/requirements.go
index 336d0ba61..3a31042d6 100644
--- a/pkg/chartutil/requirements.go
+++ b/pkg/chartutil/requirements.go
@@ -121,52 +121,55 @@ func LoadRequirementsLock(c *chart.Chart) (*RequirementsLock, error) {
 func ProcessRequirementsConditions(reqs *Requirements, cvals Values) {
 	var cond string
 	var conds []string
-
-	if reqs != nil && len(reqs.Dependencies) > 0 {
-		for _, r := range reqs.Dependencies {
-			var hasTrue, hasFalse bool
-			cond = string(r.Condition)
-			// check for list
-			if len(cond) > 0 {
-				if strings.Contains(cond, ",") {
-					conds = strings.Split(strings.TrimSpace(cond), ",")
-				} else {
-					conds = []string{strings.TrimSpace(cond)}
-				}
-				for _, c := range conds {
-					if len(c) > 0 {
-						// retrieve value
-						vv, err := cvals.PathValue(c)
-						if err == nil {
-							if vv.(bool) {
+	if reqs == nil || len(reqs.Dependencies) == 0 {
+		return
+	}
+	for _, r := range reqs.Dependencies {
+		var hasTrue, hasFalse bool
+		cond = string(r.Condition)
+		// check for list
+		if len(cond) > 0 {
+			if strings.Contains(cond, ",") {
+				conds = strings.Split(strings.TrimSpace(cond), ",")
+			} else {
+				conds = []string{strings.TrimSpace(cond)}
+			}
+			for _, c := range conds {
+				if len(c) > 0 {
+					// retrieve value
+					vv, err := cvals.PathValue(c)
+					if err == nil {
+						// if not bool, warn
+						if bv, ok := vv.(bool); ok {
+							if bv {
 								hasTrue = true
-							}
-							if !vv.(bool) {
+							} else {
 								hasFalse = true
 							}
 						} else {
-							if _, ok := err.(ErrNoValue); !ok {
-								// this is a real error
-								log.Printf("Warning: PathValue returned error %v", err)
-							}
-						}
-						if vv != nil {
-							// got first value, break loop
-							break
+							log.Printf("Warning: Condition path '%s' for chart %s returned non-bool value", c, r.Name)
 						}
+					} else if _, ok := err.(ErrNoValue); !ok {
+						// this is a real error
+						log.Printf("Warning: PathValue returned error %v", err)
+
 					}
-				}
-				if !hasTrue && hasFalse {
-					r.Enabled = false
-				} else {
-					if hasTrue {
-						r.Enabled = true
+					if vv != nil {
+						// got first value, break loop
+						break
 					}
 				}
 			}
+			if !hasTrue && hasFalse {
+				r.Enabled = false
+			} else if hasTrue {
+				r.Enabled = true
 
+			}
 		}
+
 	}
+
 }
 
 // ProcessRequirementsTags disables charts based on tags in values
@@ -176,33 +179,38 @@ func ProcessRequirementsTags(reqs *Requirements, cvals Values) {
 		return
 
 	}
-	if reqs != nil && len(reqs.Dependencies) > 0 {
-		for _, r := range reqs.Dependencies {
-			if len(r.Tags) > 0 {
-				tags := r.Tags
+	if reqs == nil || len(reqs.Dependencies) == 0 {
+		return
+	}
+	for _, r := range reqs.Dependencies {
+		if len(r.Tags) > 0 {
+			tags := r.Tags
 
-				var hasTrue, hasFalse bool
-				for _, k := range tags {
-					if b, ok := vt[k]; ok {
-						if b.(bool) {
+			var hasTrue, hasFalse bool
+			for _, k := range tags {
+				if b, ok := vt[k]; ok {
+					// if not bool, warn
+					if bv, ok := b.(bool); ok {
+						if bv {
 							hasTrue = true
-						}
-						if !b.(bool) {
+						} else {
 							hasFalse = true
 						}
+					} else {
+						log.Printf("Warning: Tag '%s' for chart %s returned non-bool value", k, r.Name)
 					}
 				}
-				if !hasTrue && hasFalse {
-					r.Enabled = false
-				} else {
-					if hasTrue || !hasTrue && !hasFalse {
-						r.Enabled = true
-					}
-				}
+			}
+			if !hasTrue && hasFalse {
+				r.Enabled = false
+			} else if hasTrue || !hasTrue && !hasFalse {
+				r.Enabled = true
 
 			}
+
 		}
 	}
+
 }
 
 // ProcessRequirementsEnabled removes disabled charts from dependencies
@@ -212,10 +220,10 @@ func ProcessRequirementsEnabled(c *chart.Chart, v *chart.Config) error {
 		// if not just missing requirements file, return error
 		if nerr, ok := err.(ErrNoRequirementsFile); !ok {
 			return nerr
-		} else {
-			// no requirements to process
-			return nil
 		}
+
+		// no requirements to process
+		return nil
 	}
 	// set all to true
 	for _, lr := range reqs.Dependencies {
@@ -238,7 +246,8 @@ func ProcessRequirementsEnabled(c *chart.Chart, v *chart.Config) error {
 		}
 	}
 	// don't keep disabled charts in new slice
-	cd := c.Dependencies[:0]
+	cd := []*chart.Chart{}
+	copy(cd, c.Dependencies[:0])
 	for _, n := range c.Dependencies {
 		if _, ok := rm[n.Metadata.Name]; !ok {
 			cd = append(cd, n)
diff --git a/pkg/chartutil/requirements_test.go b/pkg/chartutil/requirements_test.go
index ff3e895df..b9a5ae12a 100644
--- a/pkg/chartutil/requirements_test.go
+++ b/pkg/chartutil/requirements_test.go
@@ -42,7 +42,7 @@ func TestRequirementsTagsNonValue(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags with no effect
-	v := &chart.Config{Raw: string("tags:\n  nothinguseful: false\n\n")}
+	v := &chart.Config{Raw: "tags:\n  nothinguseful: false\n\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart1", "subcharta", "subchartb"}
 
@@ -54,7 +54,7 @@ func TestRequirementsTagsDisabledL1(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags disabling a group
-	v := &chart.Config{Raw: string("tags:\n  front-end: false\n\n")}
+	v := &chart.Config{Raw: "tags:\n  front-end: false\n\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart"}
 
@@ -66,7 +66,7 @@ func TestRequirementsTagsEnabledL1(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags disabling a group and enabling a different group
-	v := &chart.Config{Raw: string("tags:\n  front-end: false\n\n  back-end: true\n")}
+	v := &chart.Config{Raw: "tags:\n  front-end: false\n\n  back-end: true\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart2", "subchartb", "subchartc"}
 
@@ -78,7 +78,7 @@ func TestRequirementsTagsDisabledL2(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags disabling only children
-	v := &chart.Config{Raw: string("tags:\n  subcharta: false\n\n  subchartb: false\n")}
+	v := &chart.Config{Raw: "tags:\n  subcharta: false\n\n  subchartb: false\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart1"}
 
@@ -90,7 +90,7 @@ func TestRequirementsTagsDisabledL1Mixed(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags disabling all parents/children with additional tag re-enabling a parent
-	v := &chart.Config{Raw: string("tags:\n  front-end: false\n\n  subchart1: true\n\n  back-end: false\n")}
+	v := &chart.Config{Raw: "tags:\n  front-end: false\n\n  subchart1: true\n\n  back-end: false\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart1"}
 
@@ -102,7 +102,7 @@ func TestRequirementsConditionsNonValue(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags with no effect
-	v := &chart.Config{Raw: string("subchart1:\n  nothinguseful: false\n\n")}
+	v := &chart.Config{Raw: "subchart1:\n  nothinguseful: false\n\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart1", "subcharta", "subchartb"}
 
@@ -114,7 +114,7 @@ func TestRequirementsConditionsEnabledL1Both(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// conditions enabling the parent charts, effectively enabling children
-	v := &chart.Config{Raw: string("subchart1:\n  enabled: true\nsubchart2:\n  enabled: true\n")}
+	v := &chart.Config{Raw: "subchart1:\n  enabled: true\nsubchart2:\n  enabled: true\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart1", "subchart2", "subcharta", "subchartb", "subchartb", "subchartc"}
 
@@ -126,7 +126,7 @@ func TestRequirementsConditionsDisabledL1Both(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// conditions disabling the parent charts, effectively disabling children
-	v := &chart.Config{Raw: string("subchart1:\n  enabled: false\nsubchart2:\n  enabled: false\n")}
+	v := &chart.Config{Raw: "subchart1:\n  enabled: false\nsubchart2:\n  enabled: false\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart"}
 
@@ -139,7 +139,7 @@ func TestRequirementsConditionsSecond(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// conditions a child using the second condition path of child's condition
-	v := &chart.Config{Raw: string("subchart1:\n  subcharta:\n    enabled: false\n")}
+	v := &chart.Config{Raw: "subchart1:\n  subcharta:\n    enabled: false\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart1", "subchartb"}
 
@@ -151,7 +151,7 @@ func TestRequirementsCombinedDisabledL2(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags enabling a parent/child group with condition disabling one child
-	v := &chart.Config{Raw: string("subchartc:\n  enabled: false\ntags:\n  back-end: true\n")}
+	v := &chart.Config{Raw: "subchartc:\n  enabled: false\ntags:\n  back-end: true\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart", "subchart1", "subchart2", "subcharta", "subchartb", "subchartb"}
 
@@ -163,7 +163,7 @@ func TestRequirementsCombinedDisabledL1(t *testing.T) {
 		t.Fatalf("Failed to load testdata: %s", err)
 	}
 	// tags will not enable a child if parent is explicitly disabled with condition
-	v := &chart.Config{Raw: string("subchart1:\n  enabled: false\ntags:\n  front-end: true\n")}
+	v := &chart.Config{Raw: "subchart1:\n  enabled: false\ntags:\n  front-end: true\n"}
 	// expected charts including duplicates in alphanumeric order
 	e := []string{"parentchart"}
 
diff --git a/pkg/chartutil/testdata/subpop/Chart.yaml b/pkg/chartutil/testdata/subpop/Chart.yaml
index 77bda03b6..bbb0941c3 100644
--- a/pkg/chartutil/testdata/subpop/Chart.yaml
+++ b/pkg/chartutil/testdata/subpop/Chart.yaml
@@ -1,4 +1,4 @@
 apiVersion: v1
 description: A Helm chart for Kubernetes
 name: parentchart
-version: 0.1.0
\ No newline at end of file
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml b/pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml
index 3fa0b8dfb..94d278234 100644
--- a/pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml
+++ b/pkg/chartutil/testdata/subpop/charts/subchart1/requirements.yaml
@@ -12,4 +12,4 @@ dependencies:
         condition: subchartb.enabled
         tags:
           - front-end
-          - subchartb
\ No newline at end of file
+          - subchartb
diff --git a/pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml b/pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml
index b68d1a776..1f0023a08 100644
--- a/pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml
+++ b/pkg/chartutil/testdata/subpop/charts/subchart2/requirements.yaml
@@ -12,4 +12,4 @@ dependencies:
         condition: subchartc.enabled
         tags:
           - back-end
-          - subchartc
\ No newline at end of file
+          - subchartc
diff --git a/pkg/chartutil/testdata/subpop/noreqs/Chart.yaml b/pkg/chartutil/testdata/subpop/noreqs/Chart.yaml
index 77bda03b6..bbb0941c3 100644
--- a/pkg/chartutil/testdata/subpop/noreqs/Chart.yaml
+++ b/pkg/chartutil/testdata/subpop/noreqs/Chart.yaml
@@ -1,4 +1,4 @@
 apiVersion: v1
 description: A Helm chart for Kubernetes
 name: parentchart
-version: 0.1.0
\ No newline at end of file
+version: 0.1.0
diff --git a/pkg/chartutil/testdata/subpop/noreqs/values.yaml b/pkg/chartutil/testdata/subpop/noreqs/values.yaml
index 81c18c6b0..4ed3b7ad3 100644
--- a/pkg/chartutil/testdata/subpop/noreqs/values.yaml
+++ b/pkg/chartutil/testdata/subpop/noreqs/values.yaml
@@ -24,4 +24,3 @@ resources:
 tags:
   front-end: true
   back-end: false
-
diff --git a/pkg/chartutil/testdata/subpop/requirements.yaml b/pkg/chartutil/testdata/subpop/requirements.yaml
index 5b6b8304e..9840e047d 100644
--- a/pkg/chartutil/testdata/subpop/requirements.yaml
+++ b/pkg/chartutil/testdata/subpop/requirements.yaml
@@ -12,4 +12,4 @@ dependencies:
         condition: subchart2.enabled
         tags:
           - back-end
-          - subchart2
\ No newline at end of file
+          - subchart2
diff --git a/pkg/chartutil/values.go b/pkg/chartutil/values.go
index 074c7a97c..cc60860cd 100644
--- a/pkg/chartutil/values.go
+++ b/pkg/chartutil/values.go
@@ -383,7 +383,7 @@ func istable(v interface{}) bool {
 // PathValue takes a yaml path with . notation and returns the value if exists
 func (v Values) PathValue(ypath string) (interface{}, error) {
 	if len(ypath) == 0 {
-		return nil, error(fmt.Errorf("yaml path string cannot be zero length"))
+		return nil, fmt.Errorf("yaml path string cannot be zero length")
 	}
 	yps := strings.Split(ypath, ".")
 	if len(yps) == 1 {
@@ -397,16 +397,20 @@ func (v Values) PathValue(ypath string) (interface{}, error) {
 		// key not found
 		return nil, ErrNoValue(fmt.Errorf("%v is not a value", k))
 	}
-	table := yps[:len(yps)-1]
+	// join all elements of YAML path except last to get string table path
+	ypsLen := len(yps)
+	table := yps[:ypsLen-1]
 	st := strings.Join(table, ".")
-	key := yps[len(yps)-1:]
+	// get the last element as a string key
+	key := yps[ypsLen-1:]
 	sk := string(key[0])
-
+	// get our table for table path
 	t, err := v.Table(st)
 	if err != nil {
 		//no table
 		return nil, ErrNoValue(fmt.Errorf("%v is not a value", sk))
 	}
+	// check table for key and ensure value is not a table
 	if k, ok := t[sk]; ok && !istable(k) {
 		// key found
 		return k, nil

From fe864ad699c774cacc61bbfc007366b00a083c34 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Thu, 9 Feb 2017 15:37:58 -0800
Subject: [PATCH 5/9] feat(helm): remove logging of tags/condition warnings to
 pass ci

---
 pkg/chartutil/requirements.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/chartutil/requirements.go b/pkg/chartutil/requirements.go
index 3a31042d6..8865566e3 100644
--- a/pkg/chartutil/requirements.go
+++ b/pkg/chartutil/requirements.go
@@ -147,7 +147,7 @@ func ProcessRequirementsConditions(reqs *Requirements, cvals Values) {
 								hasFalse = true
 							}
 						} else {
-							log.Printf("Warning: Condition path '%s' for chart %s returned non-bool value", c, r.Name)
+							//log.Printf("Warning: Condition path '%s' for chart %s returned non-bool value", c, r.Name)
 						}
 					} else if _, ok := err.(ErrNoValue); !ok {
 						// this is a real error
@@ -197,7 +197,7 @@ func ProcessRequirementsTags(reqs *Requirements, cvals Values) {
 							hasFalse = true
 						}
 					} else {
-						log.Printf("Warning: Tag '%s' for chart %s returned non-bool value", k, r.Name)
+						//log.Printf("Warning: Tag '%s' for chart %s returned non-bool value", k, r.Name)
 					}
 				}
 			}

From f58214496880a6d9ef99c223e06ebd29104e4106 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Thu, 9 Feb 2017 21:35:33 -0800
Subject: [PATCH 6/9] feat(helm): add docs section about tags and conditions

---
 docs/charts.md | 74 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)

diff --git a/docs/charts.md b/docs/charts.md
index 2a119ab48..d6e74afb8 100644
--- a/docs/charts.md
+++ b/docs/charts.md
@@ -203,6 +203,80 @@ Managing charts with `requirements.yaml` is a good way to easily keep
 charts updated, and also share requirements information throughout a
 team.
 
+#### Tags and Condition fields in requirements.yaml
+
+In addition to the other fields above, each requirements entry may contain 
+the optional fields `tags` and `condition`.
+
+All charts are loaded by default. If `tags` or `condition` fields are present, 
+they will be evaluated and used to control loading for the chart(s) they are applied to. 
+
+Condition - The condition field holds one or more YAML paths (delimited by commas). 
+If this path exists in the top parent's values and resolves to a boolean value, 
+the chart will be enabled or disabled based on that boolean value.  Only the first 
+valid path found in the list is evaluated and if no paths exist then the condition has no effect.
+
+Tags - The tags field is a YAML list of labels to associate with this chart. 
+In the top parent's values, all charts with tags can be enabled or disabled by 
+specifying the tag and a boolean value.
+
+````
+# parentchart/requirements.yaml
+dependencies:
+      - name: subchart1
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subchart1.enabled, global.subchart1.enabled
+        tags:
+          - front-end
+          - subchart1
+      
+      - name: subchart2
+        repository: http://localhost:10191
+        version: 0.1.0
+        condition: subchart2.enabled, global.subchart2.enabled
+        tags:
+          - back-end
+          - subchart1
+
+````
+````
+# parentchart/values.yaml
+
+subchart1:
+  enabled: true
+tags:
+  - front-end: false
+  - back-end: true
+```` 
+
+In the above example all charts with the tag `front-end` would be disabled but since the 
+`subchart1.enabled` path evaluates to 'true' in the parent's values, the condition will override the 
+`front-end` tag and `subchart1` will be enabled.  
+
+Since `subchart2` is tagged with `back-end` and that tag evaluates to `true`, `subchart2` will be 
+enabled. Also note that although `subchart2` has a condition specified in `requirements.yaml`, there 
+is no corresponding path and value in the parent's values so that condition has no effect.  
+
+##### Using the CLI with Tags and Conditions
+
+The `--set` parameter can be used as usual to alter tag and condition values.
+
+````
+helm install --set tags.front-end=true --set subchart2.enabled=false
+
+````
+
+##### Tags and Condition Resolution
+
+
+  * **Conditions (when set in values) always override tags.** The first condition 
+    path that exists wins and subsequent ones for that chart are ignored.
+  * Tags are evaluated as 'if any of the chart's tags are true then enable the chart'.
+  * Tags and conditions values must be set in the top parent's values.
+  * The `tags:` key in values must be a top level key. Globals and nested `tags:` tables 
+    are not currently supported.
+
 ## Templates and Values
 
 Helm Chart templates are written in the

From 17c6ae61da79e735c526dc324d15ca500e07dd11 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Sat, 11 Feb 2017 13:39:15 -0800
Subject: [PATCH 7/9] feat(helm): re-enable log warnings for tags and
 conditions

---
 pkg/chartutil/requirements.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/chartutil/requirements.go b/pkg/chartutil/requirements.go
index 8865566e3..3a31042d6 100644
--- a/pkg/chartutil/requirements.go
+++ b/pkg/chartutil/requirements.go
@@ -147,7 +147,7 @@ func ProcessRequirementsConditions(reqs *Requirements, cvals Values) {
 								hasFalse = true
 							}
 						} else {
-							//log.Printf("Warning: Condition path '%s' for chart %s returned non-bool value", c, r.Name)
+							log.Printf("Warning: Condition path '%s' for chart %s returned non-bool value", c, r.Name)
 						}
 					} else if _, ok := err.(ErrNoValue); !ok {
 						// this is a real error
@@ -197,7 +197,7 @@ func ProcessRequirementsTags(reqs *Requirements, cvals Values) {
 							hasFalse = true
 						}
 					} else {
-						//log.Printf("Warning: Tag '%s' for chart %s returned non-bool value", k, r.Name)
+						log.Printf("Warning: Tag '%s' for chart %s returned non-bool value", k, r.Name)
 					}
 				}
 			}

From 8094acba74bdffd86edc2004bf127b3ce207c0fa Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Sun, 12 Feb 2017 12:44:16 -0800
Subject: [PATCH 8/9] helm(feat): remove space from example condition list

---
 docs/charts.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/charts.md b/docs/charts.md
index d6e74afb8..c86a2773b 100644
--- a/docs/charts.md
+++ b/docs/charts.md
@@ -234,7 +234,7 @@ dependencies:
       - name: subchart2
         repository: http://localhost:10191
         version: 0.1.0
-        condition: subchart2.enabled, global.subchart2.enabled
+        condition: subchart2.enabled,global.subchart2.enabled
         tags:
           - back-end
           - subchart1

From 511cbf5f6a9d7e74be3bd0ebf14c48b3fd6bc7b4 Mon Sep 17 00:00:00 2001
From: Justin Scott <justin.a.scott@intel.com>
Date: Mon, 13 Feb 2017 13:55:49 -0800
Subject: [PATCH 9/9] feat(helm): change incorrect list to dict in charts.md
 example for tags and conditions

---
 docs/charts.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs/charts.md b/docs/charts.md
index c86a2773b..096e2e4ff 100644
--- a/docs/charts.md
+++ b/docs/charts.md
@@ -246,8 +246,8 @@ dependencies:
 subchart1:
   enabled: true
 tags:
-  - front-end: false
-  - back-end: true
+  front-end: false
+  back-end: true
 ```` 
 
 In the above example all charts with the tag `front-end` would be disabled but since the