Adding --set-string flag to force string values.

cmd/helm/install.go

@@ -50,7 +50,8 @@ The install argument must be a chart reference, a path to a packaged chart,
 a path to an unpacked chart directory or a URL.
 
 To override values in a chart, use either the '--values' flag and pass in a file
-or use the '--set' flag and pass configuration from the command line.
+or use the '--set' flag and pass configuration from the command line, to force
+a string value use '--set-string'.
 
 	$ helm install -f myvalues.yaml ./redis
 
@@ -58,6 +59,10 @@ or
 
 	$ helm install --set name=prod ./redis
 
+or
+
+	$ helm install --set-string long_int=1234567890 ./redis
+
 You can specify the '--values'/'-f' flag multiple times. The priority will be given to the
 last (right-most) file specified. For example, if both myvalues.yaml and override.yaml
 contained a key called 'Test', the value set in override.yaml would take precedence:
@@ -113,6 +118,7 @@ type installCmd struct {
 	out          io.Writer
 	client       helm.Interface
 	values       []string
+	stringValues []string
 	nameTemplate string
 	version      string
 	timeout      int64
@@ -186,6 +192,7 @@ func newInstallCmd(c helm.Interface, out io.Writer) *cobra.Command {
 	f.BoolVar(&inst.disableHooks, "no-hooks", false, "prevent hooks from running during install")
 	f.BoolVar(&inst.replace, "replace", false, "re-use the given name, even if that name is already used. This is unsafe in production")
 	f.StringArrayVar(&inst.values, "set", []string{}, "set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
+	f.StringArrayVar(&inst.stringValues, "set-string", []string{}, "set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
 	f.StringVar(&inst.nameTemplate, "name-template", "", "specify template used to name the release")
 	f.BoolVar(&inst.verify, "verify", false, "verify the package before installing it")
 	f.StringVar(&inst.keyring, "keyring", defaultKeyring(), "location of public keys used for verification")
@@ -211,7 +218,7 @@ func (i *installCmd) run() error {
 		i.namespace = defaultNamespace()
 	}
 
-	rawVals, err := vals(i.valueFiles, i.values)
+	rawVals, err := vals(i.valueFiles, i.values, i.stringValues)
 	if err != nil {
 		return err
 	}
@@ -325,8 +332,8 @@ func mergeValues(dest map[string]interface{}, src map[string]interface{}) map[st
 }
 
 // vals merges values from files specified via -f/--values and
-// directly via --set, marshaling them to YAML
-func vals(valueFiles valueFiles, values []string) ([]byte, error) {
+// directly via --set or --set-string, marshaling them to YAML
+func vals(valueFiles valueFiles, values []string, stringValues []string) ([]byte, error) {
 	base := map[string]interface{}{}
 
 	// User specified a values files via -f/--values
@@ -359,6 +366,13 @@ func vals(valueFiles valueFiles, values []string) ([]byte, error) {
 		}
 	}
 
+	// User specified a value via --set-string
+	for _, value := range stringValues {
+		if err := strvals.ParseIntoString(value, base); err != nil {
+			return []byte{}, fmt.Errorf("failed parsing --set-string data: %s", err)
+		}
+	}
+
 	return yaml.Marshal(base)
 }
 

cmd/helm/lint.go

@@ -46,6 +46,7 @@ or recommendation, it will emit [WARNING] messages.
 type lintCmd struct {
 	valueFiles valueFiles
 	values     []string
+	sValues    []string
 	namespace  string
 	strict     bool
 	paths      []string
@@ -71,6 +72,7 @@ func newLintCmd(out io.Writer) *cobra.Command {
 
 	cmd.Flags().VarP(&l.valueFiles, "values", "f", "specify values in a YAML file (can specify multiple)")
 	cmd.Flags().StringArrayVar(&l.values, "set", []string{}, "set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
+	cmd.Flags().StringArrayVar(&l.sValues, "set-string", []string{}, "set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
 	cmd.Flags().StringVar(&l.namespace, "namespace", "default", "namespace to install the release into (only used if --install is set)")
 	cmd.Flags().BoolVar(&l.strict, "strict", false, "fail on lint warnings")
 
@@ -192,5 +194,12 @@ func (l *lintCmd) vals() ([]byte, error) {
 		}
 	}
 
+	// User specified a value via --set-string
+	for _, value := range l.sValues {
+		if err := strvals.ParseIntoString(value, base); err != nil {
+			return []byte{}, fmt.Errorf("failed parsing --set-string data: %s", err)
+		}
+	}
+
 	return yaml.Marshal(base)
 }

cmd/helm/template.go

@@ -68,6 +68,7 @@ type templateCmd struct {
 	chartPath    string
 	out          io.Writer
 	values       []string
+	stringValues []string
 	nameTemplate string
 	showNotes    bool
 	releaseName  string
@@ -96,6 +97,7 @@ func newTemplateCmd(out io.Writer) *cobra.Command {
 	f.VarP(&t.valueFiles, "values", "f", "specify values in a YAML file (can specify multiple)")
 	f.StringVar(&t.namespace, "namespace", "", "namespace to install the release into")
 	f.StringArrayVar(&t.values, "set", []string{}, "set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
+	f.StringArrayVar(&t.stringValues, "set-string", []string{}, "set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
 	f.StringVar(&t.nameTemplate, "name-template", "", "specify template used to name the release")
 	f.StringVar(&t.kubeVersion, "kube-version", defaultKubeVersion, "kubernetes version used as Capabilities.KubeVersion.Major/Minor")
 	f.StringVar(&t.outputDir, "output-dir", "", "writes the executed templates to files in output-dir instead of stdout")
@@ -149,7 +151,7 @@ func (t *templateCmd) run(cmd *cobra.Command, args []string) error {
 		t.namespace = defaultNamespace()
 	}
 	// get combined values and create config
-	rawVals, err := vals(t.valueFiles, t.values)
+	rawVals, err := vals(t.valueFiles, t.values, t.stringValues)
 	if err != nil {
 		return err
 	}

cmd/helm/upgrade.go

@@ -37,7 +37,8 @@ a packaged chart, or a fully qualified URL. For chart references, the latest
 version will be specified unless the '--version' flag is set.
 
 To override values in a chart, use either the '--values' flag and pass in a file
-or use the '--set' flag and pass configuration from the command line.
+or use the '--set' flag and pass configuration from the command line, to force string
+values, use '--set-string'.
 
 You can specify the '--values'/'-f' flag multiple times. The priority will be given to the
 last (right-most) file specified. For example, if both myvalues.yaml and override.yaml
@@ -63,6 +64,7 @@ type upgradeCmd struct {
 	disableHooks bool
 	valueFiles   valueFiles
 	values       []string
+	stringValues []string
 	verify       bool
 	keyring      string
 	install      bool
@@ -118,6 +120,7 @@ func newUpgradeCmd(client helm.Interface, out io.Writer) *cobra.Command {
 	f.BoolVar(&upgrade.recreate, "recreate-pods", false, "performs pods restart for the resource if applicable")
 	f.BoolVar(&upgrade.force, "force", false, "force resource update through delete/recreate if needed")
 	f.StringArrayVar(&upgrade.values, "set", []string{}, "set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
+	f.StringArrayVar(&upgrade.stringValues, "set-string", []string{}, "set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)")
 	f.BoolVar(&upgrade.disableHooks, "disable-hooks", false, "disable pre/post upgrade hooks. DEPRECATED. Use no-hooks")
 	f.BoolVar(&upgrade.disableHooks, "no-hooks", false, "disable pre/post upgrade hooks")
 	f.BoolVar(&upgrade.verify, "verify", false, "verify the provenance of the chart before upgrading")
@@ -183,6 +186,7 @@ func (u *upgradeCmd) run() error {
 				disableHooks: u.disableHooks,
 				keyring:      u.keyring,
 				values:       u.values,
+				stringValues: u.stringValues,
 				namespace:    u.namespace,
 				timeout:      u.timeout,
 				wait:         u.wait,
@@ -191,7 +195,7 @@ func (u *upgradeCmd) run() error {
 		}
 	}
 
-	rawVals, err := vals(u.valueFiles, u.values)
+	rawVals, err := vals(u.valueFiles, u.values, u.stringValues)
 	if err != nil {
 		return err
 	}

docs/chart_best_practices/values.md

@@ -92,7 +92,7 @@ There are three potential sources of values:
 
 - A chart's `values.yaml` file
 - A values file supplied by `helm install -f` or `helm upgrade -f`
-- The values passed to a `--set` flag on `helm install` or `helm upgrade`
+- The values passed to a `--set` or `--set-string` flag on `helm install` or `helm upgrade`
 
 When designing the structure of your values, keep in mind that users of your
 chart may want to override them via either the `-f` flag or with the `--set`

docs/helm/helm_install.md

@@ -12,7 +12,8 @@ The install argument must be a chart reference, a path to a packaged chart,
 a path to an unpacked chart directory or a URL.
 
 To override values in a chart, use either the '--values' flag and pass in a file
-or use the '--set' flag and pass configuration from the command line.
+or use the '--set' flag and pass configuration from the command line, to force
+a string value use '--set-string'.
 
 	$ helm install -f myvalues.yaml ./redis
 
@@ -20,6 +21,10 @@ or
 
 	$ helm install --set name=prod ./redis
 
+or
+
+	$ helm install --set-string long_int=1234567890 ./redis
+
 You can specify the '--values'/'-f' flag multiple times. The priority will be given to the
 last (right-most) file specified. For example, if both myvalues.yaml and override.yaml
 contained a key called 'Test', the value set in override.yaml would take precedence:
@@ -84,6 +89,7 @@ helm install [CHART]
       --replace                  re-use the given name, even if that name is already used. This is unsafe in production
       --repo string              chart repository url where to locate the requested chart
       --set stringArray          set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
+      --set-string stringArray   set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
       --timeout int              time in seconds to wait for any individual Kubernetes operation (like Jobs for hooks) (default 300)
       --tls                      enable TLS for request
       --tls-ca-cert string       path to TLS CA certificate file (default "$HELM_HOME/ca.pem")
@@ -111,4 +117,4 @@ helm install [CHART]
 ### SEE ALSO
 * [helm](helm.md)	 - The Helm package manager for Kubernetes.
 
-###### Auto generated by spf13/cobra on 8-Mar-2018
+###### Auto generated by spf13/cobra on 20-Mar-2018

docs/helm/helm_lint.md

@@ -23,6 +23,7 @@ helm lint [flags] PATH
 ```
       --namespace string         namespace to install the release into (only used if --install is set) (default "default")
       --set stringArray          set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
+      --set-string stringArray   set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
       --strict                   fail on lint warnings
   -f, --values valueFiles        specify values in a YAML file (can specify multiple) (default [])
 ```
@@ -41,4 +42,4 @@ helm lint [flags] PATH
 ### SEE ALSO
 * [helm](helm.md)	 - The Helm package manager for Kubernetes.
 
-###### Auto generated by spf13/cobra on 8-Mar-2018
+###### Auto generated by spf13/cobra on 9-Mar-2018

docs/helm/helm_template.md

@@ -33,6 +33,7 @@ helm template [flags] CHART
       --notes                    show the computed NOTES.txt file as well
       --output-dir string        writes the executed templates to files in output-dir instead of stdout
       --set stringArray          set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
+      --set-string stringArray   set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
   -f, --values valueFiles        specify values in a YAML file (can specify multiple) (default [])
 ```
 
@@ -50,4 +51,4 @@ helm template [flags] CHART
 ### SEE ALSO
 * [helm](helm.md)	 - The Helm package manager for Kubernetes.
 
-###### Auto generated by spf13/cobra on 8-Mar-2018
+###### Auto generated by spf13/cobra on 9-Mar-2018

docs/helm/helm_upgrade.md

@@ -14,7 +14,8 @@ a packaged chart, or a fully qualified URL. For chart references, the latest
 version will be specified unless the '--version' flag is set.
 
 To override values in a chart, use either the '--values' flag and pass in a file
-or use the '--set' flag and pass configuration from the command line.
+or use the '--set' flag and pass configuration from the command line, to force string
+values, use '--set-string'.
 
 You can specify the '--values'/'-f' flag multiple times. The priority will be given to the
 last (right-most) file specified. For example, if both myvalues.yaml and override.yaml
@@ -52,6 +53,7 @@ helm upgrade [RELEASE] [CHART]
       --reset-values             when upgrading, reset the values to the ones built into the chart
       --reuse-values             when upgrading, reuse the last release's values, and merge in any new values. If '--reset-values' is specified, this is ignored.
       --set stringArray          set values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
+      --set-string stringArray   set STRING values on the command line (can specify multiple or separate values with commas: key1=val1,key2=val2)
       --timeout int              time in seconds to wait for any individual Kubernetes operation (like Jobs for hooks) (default 300)
       --tls                      enable TLS for request
       --tls-ca-cert string       path to TLS CA certificate file (default "$HELM_HOME/ca.pem")
@@ -79,4 +81,4 @@ helm upgrade [RELEASE] [CHART]
 ### SEE ALSO
 * [helm](helm.md)	 - The Helm package manager for Kubernetes.
 
-###### Auto generated by spf13/cobra on 8-Mar-2018
+###### Auto generated by spf13/cobra on 20-Mar-2018

pkg/strvals/parser.go

@@ -45,18 +45,38 @@ func ToYAML(s string) (string, error) {
 func Parse(s string) (map[string]interface{}, error) {
 	vals := map[string]interface{}{}
 	scanner := bytes.NewBufferString(s)
-	t := newParser(scanner, vals)
+	t := newParser(scanner, vals, false)
 	err := t.parse()
 	return vals, err
 }
 
-//ParseInto parses a strvals line and merges the result into dest.
+// Parse parses a set line and forces a string value.
+//
+// A set line is of the form name1=value1,name2=value2
+func ParseString(s string) (map[string]interface{}, error) {
+	vals := map[string]interface{}{}
+	scanner := bytes.NewBufferString(s)
+	t := newParser(scanner, vals, true)
+	err := t.parse()
+	return vals, err
+}
+
+// ParseInto parses a strvals line and merges the result into dest.
 //
 // If the strval string has a key that exists in dest, it overwrites the
 // dest version.
 func ParseInto(s string, dest map[string]interface{}) error {
 	scanner := bytes.NewBufferString(s)
-	t := newParser(scanner, dest)
+	t := newParser(scanner, dest, false)
+	return t.parse()
+}
+
+// ParseIntoString parses a strvals line nad merges the result into dest.
+//
+// This method always returns a string as the value.
+func ParseIntoString(s string, dest map[string]interface{}) error {
+	scanner := bytes.NewBufferString(s)
+	t := newParser(scanner, dest, true)
 	return t.parse()
 }
 
@@ -65,10 +85,11 @@ func ParseInto(s string, dest map[string]interface{}) error {
 type parser struct {
 	sc   *bytes.Buffer
 	data map[string]interface{}
+	st   bool
 }
 
-func newParser(sc *bytes.Buffer, data map[string]interface{}) *parser {
-	return &parser{sc: sc, data: data}
+func newParser(sc *bytes.Buffer, data map[string]interface{}, stringBool bool) *parser {
+	return &parser{sc: sc, data: data, st: stringBool}
 }
 
 func (t *parser) parse() error {
@@ -133,7 +154,7 @@ func (t *parser) key(data map[string]interface{}) error {
 				return e
 			case ErrNotList:
 				v, e := t.val()
-				set(data, string(k), typedVal(v))
+				set(data, string(k), typedVal(v, t.st))
 				return e
 			default:
 				return e
@@ -206,7 +227,7 @@ func (t *parser) listItem(list []interface{}, i int) ([]interface{}, error) {
 			return setIndex(list, i, ""), err
 		case ErrNotList:
 			v, e := t.val()
-			return setIndex(list, i, typedVal(v)), e
+			return setIndex(list, i, typedVal(v, t.st)), e
 		default:
 			return list, e
 		}
@@ -265,10 +286,10 @@ func (t *parser) valList() ([]interface{}, error) {
 			if r, _, e := t.sc.ReadRune(); e == nil && r != ',' {
 				t.sc.UnreadRune()
 			}
-			list = append(list, typedVal(v))
+			list = append(list, typedVal(v, t.st))
 			return list, nil
 		case last == ',':
-			list = append(list, typedVal(v))
+			list = append(list, typedVal(v, t.st))
 		}
 	}
 }
@@ -298,7 +319,7 @@ func inMap(k rune, m map[rune]bool) bool {
 	return ok
 }
 
-func typedVal(v []rune) interface{} {
+func typedVal(v []rune, st bool) interface{} {
 	val := string(v)
 	if strings.EqualFold(val, "true") {
 		return true
@@ -308,8 +329,8 @@ func typedVal(v []rune) interface{} {
 		return false
 	}
 
-	// If this value does not start with zero, try parsing it to an int
-	if len(val) != 0 && val[0] != '0' {
+	// If this value does not start with zero, and not returnString, try parsing it to an int
+	if !st && len(val) != 0 && val[0] != '0' {
 		if iv, err := strconv.ParseInt(val, 10, 64); err == nil {
 			return iv
 		}

pkg/strvals/parser_test.go

@@ -65,6 +65,17 @@ func TestSetIndex(t *testing.T) {
 }
 
 func TestParseSet(t *testing.T) {
+	testsString := []struct {
+		str    string
+		expect map[string]interface{}
+		err    bool
+	}{
+		{
+			str:    "long_int_string=1234567890",
+			expect: map[string]interface{}{"long_int_string": "1234567890"},
+			err:    false,
+		},
+	}
 	tests := []struct {
 		str    string
 		expect map[string]interface{}
@@ -97,6 +108,10 @@ func TestParseSet(t *testing.T) {
 			str:    "leading_zeros=00009",
 			expect: map[string]interface{}{"leading_zeros": "00009"},
 		},
+		{
+			str:    "long_int=1234567890",
+			expect: map[string]interface{}{"long_int": 1234567890},
+		},
 		{
 			str: "name1,name2=",
 			err: true,
@@ -278,6 +293,31 @@ func TestParseSet(t *testing.T) {
 			t.Fatalf("Error serializing parsed value: %s", err)
 		}
 
+		if string(y1) != string(y2) {
+			t.Errorf("%s: Expected:\n%s\nGot:\n%s", tt.str, y1, y2)
+		}
+	}
+	for _, tt := range testsString {
+		got, err := ParseString(tt.str)
+		if err != nil {
+			if tt.err {
+				continue
+			}
+			t.Fatalf("%s: %s", tt.str, err)
+		}
+		if tt.err {
+			t.Errorf("%s: Expected error. Got nil", tt.str)
+		}
+
+		y1, err := yaml.Marshal(tt.expect)
+		if err != nil {
+			t.Fatal(err)
+		}
+		y2, err := yaml.Marshal(got)
+		if err != nil {
+			t.Fatalf("Error serializing parsed value: %s", err)
+		}
+
 		if string(y1) != string(y2) {
 			t.Errorf("%s: Expected:\n%s\nGot:\n%s", tt.str, y1, y2)
 		}

scripts/completions.bash

@@ -830,6 +830,8 @@ _helm_install()
     local_nonpersistent_flags+=("--repo=")
     flags+=("--set=")
     local_nonpersistent_flags+=("--set=")
+    flags+=("--set-string=")
+    local_nonpersistent_flags+=("--set-string=")
     flags+=("--timeout=")
     local_nonpersistent_flags+=("--timeout=")
     flags+=("--tls")