Add the ability to copy configs between stacks

CHANGELOG.md

@@ -5,6 +5,9 @@ CHANGELOG
 
 - Add support for streamInvoke during update
   [#4990](https://github.com/pulumi/pulumi/pull/4990)
+
+- Add ability to copy configuration values between stacks
+  [#4971](https://github.com/pulumi/pulumi/pull/4971)
 
 ## 2.6.1 (2020-07-09)
 

pkg/cmd/pulumi/config.go

@@ -80,10 +80,162 @@ func newConfigCmd() *cobra.Command {
 	cmd.AddCommand(newConfigRmCmd(&stack))
 	cmd.AddCommand(newConfigSetCmd(&stack))
 	cmd.AddCommand(newConfigRefreshCmd(&stack))
+	cmd.AddCommand(newConfigCopyCmd(&stack))
 
 	return cmd
 }
 
+func newConfigCopyCmd(stack *string) *cobra.Command {
+	var path bool
+	var destinationStackName string
+
+	cpCommand := &cobra.Command{
+		Use:   "cp [key]",
+		Short: "Copy config to another stack",
+		Long: "Copies the config from the current stack to the destination stack. If `key` is omitted,\n" +
+			"then all of the config from the current stack will be copied to the destination stack.",
+		Args: cmdutil.MaximumNArgs(1),
+		Run: cmdutil.RunFunc(func(cmd *cobra.Command, args []string) error {
+			opts := display.Options{
+				Color: cmdutil.GetGlobalColorization(),
+			}
+
+			// Get current stack and ensure that it is a different stack to the destination stack
+			currentStack, err := requireStack(*stack, false, opts, true /*setCurrent*/)
+			if err != nil {
+				return err
+			}
+			if currentStack.Ref().Name().String() == destinationStackName {
+				return errors.New("current stack and destination stack are the same")
+			}
+			currentProjectStack, err := loadProjectStack(currentStack)
+			if err != nil {
+				return err
+			}
+
+			// Get the destination stack
+			destinationStack, err := requireStack(destinationStackName, false, opts, false /*setCurrent*/)
+			if err != nil {
+				return err
+			}
+			destinationProjectStack, err := loadProjectStack(destinationStack)
+			if err != nil {
+				return err
+			}
+
+			// Do we need to copy a single value or the entire map
+			if len(args) > 0 {
+				// A single key was specified so we only need to copy that specific value
+				return copySingleConfigKey(args[0], path, currentStack, currentProjectStack, destinationStack,
+					destinationProjectStack)
+			}
+
+			return copyEntireConfigMap(currentStack, currentProjectStack, destinationStack, destinationProjectStack)
+		}),
+	}
+
+	cpCommand.PersistentFlags().BoolVar(
+		&path, "path", false,
+		"The key contains a path to a property in a map or list to set")
+	cpCommand.PersistentFlags().StringVarP(
+		&destinationStackName, "dest", "d", "",
+		"The name of the new stack to copy the config to")
+
+	return cpCommand
+}
+
+func copySingleConfigKey(configKey string, path bool, currentStack backend.Stack,
+	currentProjectStack *workspace.ProjectStack, destinationStack backend.Stack,
+	destinationProjectStack *workspace.ProjectStack) error {
+	var decrypter config.Decrypter
+	key, err := parseConfigKey(configKey)
+	if err != nil {
+		return errors.Wrap(err, "invalid configuration key")
+	}
+
+	v, ok, err := currentProjectStack.Config.Get(key, path)
+	if err != nil {
+		return errors.Errorf(
+			"configuration key '%s' not found for stack '%s'", prettyKey(key), currentStack.Ref())
+	}
+	if ok {
+		if v.Secure() {
+			var err error
+			if decrypter, err = getStackDecrypter(currentStack); err != nil {
+				return errors.Wrap(err, "could not create a decrypter")
+			}
+		} else {
+			decrypter = config.NewPanicCrypter()
+		}
+
+		encrypter, cerr := getStackEncrypter(destinationStack)
+		if cerr != nil {
+			return cerr
+		}
+
+		val, err := v.Copy(decrypter, encrypter)
+		if err != nil {
+			return err
+		}
+
+		err = destinationProjectStack.Config.Set(key, val, path)
+		if err != nil {
+			return err
+		}
+
+		return saveProjectStack(destinationStack, destinationProjectStack)
+	}
+
+	return nil
+}
+
+func copyEntireConfigMap(currentStack backend.Stack,
+	currentProjectStack *workspace.ProjectStack, destinationStack backend.Stack,
+	destinationProjectStack *workspace.ProjectStack) error {
+
+	var decrypter config.Decrypter
+	currentConfig := currentProjectStack.Config
+	if currentConfig.HasSecureValue() {
+		dec, decerr := getStackDecrypter(currentStack)
+		if decerr != nil {
+			return decerr
+		}
+		decrypter = dec
+	} else {
+		decrypter = config.NewPanicCrypter()
+	}
+
+	encrypter, cerr := getStackEncrypter(destinationStack)
+	if cerr != nil {
+		return cerr
+	}
+
+	newProjectConfig, err := currentConfig.Copy(decrypter, encrypter)
+	if err != nil {
+		return err
+	}
+
+	var requiresSaving bool
+	for key, val := range newProjectConfig {
+		err = destinationProjectStack.Config.Set(key, val, false)
+		if err != nil {
+			return err
+		}
+		requiresSaving = true
+	}
+
+	// The use of `requiresSaving` here ensures that there was actually some config
+	// that needed saved, otherwise it's an unnecessary save call
+	if requiresSaving {
+		err := saveProjectStack(destinationStack, destinationProjectStack)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func newConfigGetCmd(stack *string) *cobra.Command {
 	var jsonOut bool
 	var path bool
@@ -431,7 +583,7 @@ func listConfig(stack backend.Stack, showSecrets bool, jsonOut bool) error {
 	// By default, we will use a blinding decrypter to show "[secret]". If requested, display secrets in plaintext.
 	decrypter := config.NewBlindingDecrypter()
 	if cfg.HasSecureValue() && showSecrets {
-		dec, decerr := getStackDencrypter(stack)
+		dec, decerr := getStackDecrypter(stack)
 		if decerr != nil {
 			return decerr
 		}
@@ -518,7 +670,7 @@ func getConfig(stack backend.Stack, key config.Key, path, jsonOut bool) error {
 		var d config.Decrypter
 		if v.Secure() {
 			var err error
-			if d, err = getStackDencrypter(stack); err != nil {
+			if d, err = getStackDecrypter(stack); err != nil {
 				return errors.Wrap(err, "could not create a decrypter")
 			}
 		} else {

pkg/cmd/pulumi/crypto.go

@@ -37,7 +37,7 @@ func getStackEncrypter(s backend.Stack) (config.Encrypter, error) {
 	return sm.Encrypter()
 }
 
-func getStackDencrypter(s backend.Stack) (config.Decrypter, error) {
+func getStackDecrypter(s backend.Stack) (config.Decrypter, error) {
 	sm, err := getStackSecretsManager(s)
 	if err != nil {
 		return nil, err

pkg/cmd/pulumi/history.go

@@ -61,7 +61,7 @@ This command lists data about previous updates for a stack.`,
 			}
 			var decrypter config.Decrypter
 			if showSecrets {
-				crypter, err := getStackDencrypter(s)
+				crypter, err := getStackDecrypter(s)
 				if err != nil {
 					return errors.Wrap(err, "decrypting secrets")
 				}

pkg/go.sum

@@ -134,6 +134,8 @@ github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7 h1:6pwm8kMQKCmgUg0ZHTm5+/YvRK0s3THD/28+T6/kk4A=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/creack/pty v1.1.9 h1:uDmaGzcdjhF4i/plgjmEsriH11Y0o7RKapEf/LDaM3w=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -323,12 +325,16 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxv
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
+github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/pty v1.1.4/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/pty v1.1.8 h1:AkaSdXYQOWeaO3neb8EM634ahkXXe3jYbVh/F9lq+GI=
 github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348 h1:MtvEpTB6LX3vkb4ax0b5D2DHbNAUsen0Gx5wZoq3lV4=
 github.com/kylelemons/godebug v0.0.0-20170820004349-d65d576e9348/go.mod h1:B69LEHPfb2qLo0BaaOLcbitczOKLWTsrBG9LczfCD4k=
 github.com/lib/pq v1.1.1/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=

scripts/go.sum

@@ -24,6 +24,7 @@ github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -80,10 +81,14 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxv
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
+github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
 github.com/mattn/go-colorable v0.1.6/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=

sdk/go.mod

@@ -15,6 +15,8 @@ require (
 	github.com/golang/protobuf v1.3.5
 	github.com/grpc-ecosystem/grpc-opentracing v0.0.0-20180507213350-8e809c8a8645
 	github.com/hashicorp/go-multierror v1.0.0
+	github.com/kr/pretty v0.2.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
 	github.com/mattn/go-colorable v0.1.6 // indirect
 	github.com/mattn/go-runewidth v0.0.8 // indirect
 	github.com/mitchellh/go-ps v1.0.0

sdk/go.sum

@@ -32,6 +32,7 @@ github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -104,10 +105,14 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxv
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0 h1:L/CwN0zerZDmRFUapSPitk6f+Q3+0za1rQkzVuMiMFI=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.2.0 h1:s5hAObm+yFO5uHYt5dYjxi2rXrsnmRpJx4OYvIWUaQs=
+github.com/kr/pretty v0.2.0/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/mattn/go-colorable v0.1.4/go.mod h1:U0ppj6V5qS13XJ6of8GYAs25YV2eR4EVcfRqFIhoBtE=
 github.com/mattn/go-colorable v0.1.6 h1:6Su7aK7lXmJ/U79bYtBjLNaha4Fs1Rg9plHpcH+vvnE=

sdk/go/common/resource/config/crypt.go

@@ -208,3 +208,21 @@ func decryptAES256GCM(ciphertext []byte, key []byte, nonce []byte) (string, erro
 
 	return string(msg), err
 }
+
+// Crypter that just adds a prefix to the plaintext string when encrypting,
+// and removes the prefix from the ciphertext when decrypting.
+type prefixCrypter struct {
+	prefix string
+}
+
+func newPrefixCrypter(prefix string) Crypter {
+	return prefixCrypter{prefix: prefix}
+}
+
+func (c prefixCrypter) DecryptValue(ciphertext string) (string, error) {
+	return strings.TrimPrefix(ciphertext, c.prefix), nil
+}
+
+func (c prefixCrypter) EncryptValue(plaintext string) (string, error) {
+	return c.prefix + plaintext, nil
+}

sdk/go/common/resource/config/map.go

@@ -43,6 +43,20 @@ func (m Map) Decrypt(decrypter Decrypter) (map[Key]string, error) {
 	return r, nil
 }
 
+func (m Map) Copy(decrypter Decrypter, encrypter Encrypter) (Map, error) {
+	newConfig := make(Map)
+	for k, c := range m {
+		val, err := c.Copy(decrypter, encrypter)
+		if err != nil {
+			return nil, err
+		}
+
+		newConfig[k] = val
+	}
+
+	return newConfig, nil
+}
+
 // HasSecureValue returns true if the config map contains a secure (encrypted) value.
 func (m Map) HasSecureValue() bool {
 	for _, v := range m {