Merge pull request #4336 from dokku/4306-stacks-set

Add ability to manage stacks on an app or global level …

docs/configuration/environment-variables.md

@@ -78,7 +78,7 @@ The following config variables have special meanings and can be set in a variety
 | Name                           | Default                         | How to modify                                                                                                                                    | Description                                                                                                |
 | ------------------------------ | ------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------- |
 | `DOKKU_ROOT`                   | `~dokku`                        | `/etc/environment`                                                                                                                               | The root directory where dokku will store application repositories, as well as certain configuration files. |
-| `DOKKU_IMAGE`                  | `gliderlabs/herokuish`          | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*`                                                                           | The default image to use when building herokuish containers. |
+| `DOKKU_IMAGE`                  | `gliderlabs/herokuish`          | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*`                                                                           | The default image to use when building herokuish containers. Deprecated in favor of using `buildpacks:set-property` |
 | `DOKKU_LIB_ROOT`               | `/var/lib/dokku`                | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*`                                                                           | The directory where plugins, certain data, and general configuration is stored. |
 | `PLUGIN_PATH`                  | `$DOKKU_LIB_ROOT/plugins"`      | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*`                                                                           | The top-level directory where plugins are stored. |
 | `PLUGIN_AVAILABLE_PATH`        | `$PLUGIN_PATH/available"`       | `/etc/environment` <br /> `~dokku/.dokkurc` <br /> `~dokku/.dokkurc/*`                                                                           | The directory that holds all available plugins, including core. |

docs/deployment/methods/cloud-native-buildpacks.md

@@ -2,6 +2,9 @@
 
 > New as of 0.22.0
 
+```
+buildpacks:set-property [--global|<app>] <key> <value>  # Set or clear a buildpacks property for an app
+```
 Cloud Native Buildpacks are an evolution over the Buildpacks technology provided by the Herokuish builder. See the [herokuish buildpacks documentation](/docs/deployment/methods/herokuish.md) for more information on how to clear buildpack build cache for an application.
 
 > Warning: This functionality uses the `pack` cli from the [Cloud Native Buildpacks](https://buildpacks.io) project to build apps. As the integration is experimental in Dokku, it is likely to change over time.
@@ -22,10 +25,8 @@ Builds will proceed with the `pack` cli for the app from then on.
 
 As this functionality is highly experimental, there are a number of caveats. Please note that not all issuesare listed below.
 
-- The `heroku/buildpacks:latest` CNB builder is currently enforced. Specifying specific builders is not currently possible.
-  - A future release will allow modifying the chosen builder.
 - Specifying specific buildpacks is not currently possible.
-  - A future release will add support for the `buildpacks` plugin.
+  - A future release will add support for specifying buildpacks via the `buildpacks` plugin.
 - There is currently no way to specify extra arguments for `pack` cli invocations.
   - A future release will add support for injecting extra arguments during the build process.
 - The default process type is `web`.
@@ -33,3 +34,31 @@ As this functionality is highly experimental, there are a number of caveats. Ple
   - A future version will add integration with the `repo` plugin.
 - `pack` is not currently included with Dokku, nor is it added as a package dependency.
   - A future version will include it as a package dependency.
+
+### Customizing the Buildpack stack builder
+
+> New as of 0.23.0
+
+The default stack builder in use by CNB buildpacks in Dokku is based on `heroku/buildpacks`. Users may desire to switch the stack builder to a custom version, either to update the operating system or to customize packages included with the stack builder. This can be performed via the `buildpacks:set-property` command.
+
+```shell
+dokku buildpacks:set-property node-js-app paketobuildpacks/build:base-cnb
+```
+
+The specified stack builder can also be unset by omitting the name of the stack builder when calling `buildpacks:set-property`.
+
+```shell
+dokku buildpacks:set-property node-js-app
+```
+
+A change in the stack builder value will execute the `post-stack-set` trigger.
+
+Finally, stack builders can be set or unset globally as a fallback. This will take precedence over a globally set `DOKKU_CNB_STACK` environment variable (`heroku/buildpacks` by default).
+
+```shell
+# set globally
+dokku buildpacks:set-property --global paketobuildpacks/build:base-cnb
+
+# unset globally
+dokku buildpacks:set-property --global
+```

docs/deployment/methods/herokuish-buildpacks.md

@@ -3,12 +3,13 @@
 > Subcommands new as of 0.15.0
 
 ```
-buildpacks:add [--index 1] <app> <buildpack>  # Add new app buildpack while inserting into list of buildpacks if necessary
+buildpacks:add [--index 1] <app> <buildpack>            # Add new app buildpack while inserting into list of buildpacks if necessary
-buildpacks:clear <app>                        # Clear all buildpacks set on the app
+buildpacks:clear <app>                                  # Clear all buildpacks set on the app
-buildpacks:list <app>                         # List all buildpacks for an app
+buildpacks:list <app>                                   # List all buildpacks for an app
-buildpacks:remove <app> <buildpack>           # Remove a buildpack set on the app
+buildpacks:remove <app> <buildpack>                     # Remove a buildpack set on the app
-buildpacks:report [<app>] [<flag>]            # Displays a buildpack report for one or more apps
+buildpacks:report [<app>] [<flag>]                      # Displays a buildpack report for one or more apps
-buildpacks:set [--index 1] <app> <buildpack>  # Set new app buildpack at a given position defaulting to the first buildpack if no index is specified
+buildpacks:set [--index 1] <app> <buildpack>            # Set new app buildpack at a given position defaulting to the first buildpack if no index is specified
+buildpacks:set-property [--global|<app>] <key> <value>  # Set or clear a buildpacks property for an app
 ```
 
 > Warning: If using the `buildpacks` plugin, be sure to unset any `BUILDPACK_URL` and remove any such entries from a committed `.env` file. A specified `BUILDPACK_URL` will always override a `.buildpacks` file or the buildpacks plugin.
@@ -123,6 +124,34 @@ The `buildpacks:clear` command can be used to clear all configured buildpacks fo
 dokku buildpacks:clear node-js-app
 ```
 
+### Customizing the Buildpack stack builder
+
+> New as of 0.23.0
+
+The default stack builder in use by Herokuish buildpacks in Dokku is based on `gliderlabs/herokuish:latest`. Typically, this is installed via an OS package which pulls the requisite Docker image. Users may desire to switch the stack builder to a custom version, either to update the operating system or to customize packages included with the stack builder. This can be performed via the `buildpacks:set-property` command.
+
+```shell
+dokku buildpacks:set-property node-js-app gliderlabs/herokuish:latest
+```
+
+The specified stack builder can also be unset by omitting the name of the stack builder when calling `buildpacks:set-property`.
+
+```shell
+dokku buildpacks:set-property node-js-app
+```
+
+A change in the stack builder value will execute the `post-stack-set` trigger.
+
+Finally, stack builders can be set or unset globally as a fallback. This will take precedence over a globally set `DOKKU_IMAGE` environment variable (`gliderlabs/herokuish:latest` by default).
+
+```shell
+# set globally
+dokku buildpacks:set-property --global gliderlabs/herokuish:latest
+
+# unset globally
+dokku buildpacks:set-property --global
+```
+
 ### Displaying buildpack reports for an app
 
 You can get a report about the app's buildpacks status using the `buildpacks:report` command:
@@ -133,11 +162,20 @@ dokku buildpacks:report
 
 ```
 =====> node-js-app buildpacks information
-       Buildpacks list:               https://github.com/heroku/heroku-buildpack-nodejs.git
+       Buildpacks computed stack:  gliderlabs/herokuish:v0.5.23-20
+       Buildpacks global stack:    gliderlabs/herokuish:latest
+       Buildpacks list:            https://github.com/heroku/heroku-buildpack-nodejs.git
+       Buildpacks stack:           gliderlabs/herokuish:v0.5.23-20
 =====> python-sample buildpacks information
-       Buildpacks list:               https://github.com/heroku/heroku-buildpack-nodejs.git,https://github.com/heroku/heroku-buildpack-python.git
+       Buildpacks computed stack:  gliderlabs/herokuish:v0.5.23-20
+       Buildpacks global stack:    gliderlabs/herokuish:latest
+       Buildpacks list:            https://github.com/heroku/heroku-buildpack-nodejs.git,https://github.com/heroku/heroku-buildpack-python.git
+       Buildpacks stack:
 =====> ruby-sample buildpacks information
+       Buildpacks computed stack:  gliderlabs/herokuish:v0.5.23-20
+       Buildpacks global stack:    gliderlabs/herokuish:latest
        Buildpacks list:
+       Buildpacks stack:
 ```
 
 You can run the command for a specific app also.

dokku

@@ -42,6 +42,7 @@ DOKKU_DISTRO=$(
 export DOCKER_BIN=${DOCKER_BIN:="docker"}
 
 export DOKKU_IMAGE=${DOKKU_IMAGE:="gliderlabs/herokuish:latest"}
+export DOKKU_CNB_BUILDER=${DOKKU_CNB_BUILDER:="heroku/buildpacks"}
 export DOKKU_LIB_ROOT=${DOKKU_LIB_PATH:="/var/lib/dokku"}
 
 export PLUGIN_PATH=${PLUGIN_PATH:="$DOKKU_LIB_ROOT/plugins"}

plugins/builder-cnb/builder-build

@@ -13,6 +13,14 @@ trigger-builder-cnb-builder-build() {
     return
   fi
 
+
+  local stack="$(plugn trigger buildpack-stack-name "$APP")"
+  if [[ -z "$stack" ]]; then
+    DOKKU_CNB_STACK="$stack"
+  fi
+
+  dokku_log_info1 "Building $APP from cnb stack $DOKKU_CNB_STACK (experimental)..."
+
   if ! command -v "pack" &>/dev/null; then
     dokku_log_fail "Missing pack, install it"
   fi
@@ -28,7 +36,7 @@ trigger-builder-cnb-builder-build() {
 
   plugn trigger pre-build-cnb "$APP" "$SOURCECODE_WORK_DIR"
 
-  pack build "$IMAGE" --builder heroku/buildpacks --path "$SOURCECODE_WORK_DIR" --default-process web
+  pack build "$IMAGE" --builder "$DOKKU_CNB_BUILDER" --path "$SOURCECODE_WORK_DIR" --default-process web
 
   echo "FROM $IMAGE" | suppress_output "$DOCKER_BIN" image build --label=com.dokku.image-stage=build --label=org.label-schema.schema-version=1.0 --label=org.label-schema.vendor=dokku --label=com.dokku.app-name=$APP --label=dokku -t "$IMAGE" -
 

plugins/builder-dockerfile/builder-build

@@ -12,6 +12,8 @@ trigger-builder-dockerfile-builder-build() {
     return
   fi
 
+  dokku_log_info1 "Building $APP from Dockerfile"
+
   local IMAGE=$(get_app_image_name "$APP")
   local DOCKER_BUILD_LABEL_ARGS="--label=org.label-schema.schema-version=1.0 --label=org.label-schema.vendor=dokku --label=com.dokku.app-name=$APP"
 

plugins/builder-herokuish/builder-build

@@ -12,6 +12,14 @@ trigger-builder-herokuish-builder-build() {
     return
   fi
 
+  local stack="$(plugn trigger buildpack-stack-name "$APP")"
+  if [[ -n "$stack" ]]; then
+    dokku_log_info1 "Building $APP from $stack"
+    DOKKU_IMAGE="$stack"
+  else
+    dokku_log_info1 "Building $APP from herokuish"
+  fi
+
   local IMAGE=$(get_app_image_name "$APP")
   local DOKKU_APP_CACHE_DIR="$DOKKU_ROOT/$APP/cache"
   local DOKKU_APP_HOST_CACHE_DIR="$DOKKU_HOST_ROOT/$APP/cache"
@@ -22,8 +30,6 @@ trigger-builder-herokuish-builder-build() {
   pushd "$SOURCECODE_WORK_DIR" &>/dev/null
 
   eval "$(config_export app "$APP")"
-
-  DOKKU_IMAGE="$(config_get "$APP" DOKKU_IMAGE || echo "$DOKKU_IMAGE")"
   plugn trigger builder-create-dokku-image "$BUILDER_TYPE" "$APP" "$SOURCECODE_WORK_DIR" "$DOKKU_IMAGE"
   NEW_DOKKU_IMAGE=$(plugn trigger builder-dokku-image "$BUILDER_TYPE" "$APP" "$SOURCECODE_WORK_DIR" "$DOKKU_IMAGE")
   [[ -n "$NEW_DOKKU_IMAGE" ]] && DOKKU_IMAGE="$NEW_DOKKU_IMAGE"

plugins/buildpacks/.gitignore

@@ -2,6 +2,7 @@
 /subcommands/*
 /triggers/*
 /triggers
+/buildpack-stack-name
 /install
 /post-*
 /report

plugins/buildpacks/Makefile

@@ -1,5 +1,5 @@
-SUBCOMMANDS = subcommands/add subcommands/clear subcommands/list subcommands/remove subcommands/report subcommands/set
+SUBCOMMANDS = subcommands/add subcommands/clear subcommands/list subcommands/remove subcommands/report subcommands/set subcommands/set-property
-TRIGGERS = triggers/install triggers/post-app-clone-setup triggers/post-app-rename-setup triggers/post-delete triggers/post-extract triggers/report
+TRIGGERS = triggers/buildpack-stack-name triggers/install triggers/post-app-clone-setup triggers/post-app-rename-setup triggers/post-delete triggers/post-extract triggers/report
 BUILD = commands subcommands triggers
 PLUGIN_NAME = buildpacks
 

plugins/buildpacks/buildpacks.go

@@ -0,0 +1,13 @@
+package buildpacks
+
+var (
+	// DefaultProperties is a map of all valid buildpacks properties with corresponding default property values
+	DefaultProperties = map[string]string{
+		"stack": "",
+	}
+
+	// GlobalProperties is a map of all valid global buildpacks properties
+	GlobalProperties = map[string]bool{
+		"stack": true,
+	}
+)

plugins/buildpacks/report.go

@@ -1,6 +1,7 @@
 package buildpacks
 
 import (
+	"os"
 	"strings"
 
 	"github.com/dokku/dokku/plugins/common"
@@ -13,7 +14,10 @@ func ReportSingleApp(appName, infoFlag string) error {
 	}
 
 	flags := map[string]common.ReportFunc{
-		"--buildpacks-list": reportList,
+		"--buildpacks-computed-stack": reportComputedStack,
+		"--buildpacks-global-stack":   reportGlobalStack,
+		"--buildpacks-list":           reportList,
+		"--buildpacks-stack":          reportStack,
 	}
 
 	flagKeys := []string{}
@@ -27,6 +31,28 @@ func ReportSingleApp(appName, infoFlag string) error {
 	return common.ReportSingleApp("buildpacks", appName, infoFlag, infoFlags, flagKeys, trimPrefix, uppercaseFirstCharacter)
 }
 
+func reportComputedStack(appName string) string {
+	if stack := common.PropertyGetDefault("buildpacks", appName, "stack", ""); stack != "" {
+		return stack
+	}
+
+	if stack := common.PropertyGetDefault("buildpacks", "--global", "stack", ""); stack != "" {
+		return stack
+	}
+
+	b, _ := common.PlugnTriggerOutput("config-get", []string{appName, "DOKKU_IMAGE"}...)
+	if dokkuImage := strings.TrimSpace(string(b[:])); dokkuImage != "" {
+		common.LogWarn("Deprecated: use buildpacks:set-property instead of specifying DOKKU_IMAGE environment variable")
+		return dokkuImage
+	}
+
+	return os.Getenv("DOKKU_IMAGE")
+}
+
+func reportGlobalStack(appName string) string {
+	return common.PropertyGetDefault("buildpacks", "--global", "stack", "")
+}
+
 func reportList(appName string) string {
 	buildpacks, err := common.PropertyListGet("buildpacks", appName, "buildpacks")
 	if err != nil {
@@ -35,3 +61,7 @@ func reportList(appName string) string {
 
 	return strings.Join(buildpacks, ",")
 }
+
+func reportStack(appName string) string {
+	return common.PropertyGetDefault("buildpacks", appName, "stack", "")
+}

plugins/buildpacks/src/commands/commands.go

@@ -24,6 +24,7 @@ Additional commands:`
     buildpacks:remove <app> <buildpack>, Remove a buildpack set on the app
     buildpacks:report [<app>] [<flag>], Displays a buildpack report for one or more apps
     buildpacks:set [--index 1] <app> <buildpack>, Set new app buildpack at a given position defaulting to the first buildpack if no index is specified
+    buildpacks:set-property [--global|<app>] <key> <value>, Set or clear a buildpacks property for an app
 `
 )
 

plugins/buildpacks/src/subcommands/subcommands.go

@@ -57,6 +57,19 @@ func main() {
 		appName := args.Arg(0)
 		buildpack := args.Arg(1)
 		err = buildpacks.CommandSet(appName, buildpack, *index)
+	case "set-property":
+		args := flag.NewFlagSet("buildpacks:set-property", flag.ExitOnError)
+		global := args.Bool("global", false, "--global: set a global property")
+		args.Parse(os.Args[2:])
+		appName := args.Arg(0)
+		property := args.Arg(1)
+		value := args.Arg(2)
+		if *global {
+			appName = "--global"
+			property = args.Arg(0)
+			value = args.Arg(1)
+		}
+		err = buildpacks.CommandSetProperty(appName, property, value)
 	default:
 		common.LogFail(fmt.Sprintf("Invalid plugin subcommand call: %s", subcommand))
 	}

plugins/buildpacks/src/triggers/triggers.go

@@ -18,8 +18,11 @@ func main() {
 
 	var err error
 	switch trigger {
+	case "buildpack-stack-name":
+		appName := flag.Arg(0)
+		err = buildpacks.TriggerBuildpackStackName(appName)
 	case "install":
-		buildpacks.TriggerInstall()
+		err = buildpacks.TriggerInstall()
 	case "post-app-clone-setup":
 		oldAppName := flag.Arg(0)
 		newAppName := flag.Arg(1)
@@ -30,11 +33,11 @@ func main() {
 		err = buildpacks.TriggerPostAppRenameSetup(oldAppName, newAppName)
 	case "post-delete":
 		appName := flag.Arg(0)
-		buildpacks.TriggerPostDelete(appName)
+		err = buildpacks.TriggerPostDelete(appName)
 	case "post-extract":
 		appName := flag.Arg(0)
 		sourceWorkDir := flag.Arg(1)
-		buildpacks.TriggerPostExtract(appName, sourceWorkDir)
+		err = buildpacks.TriggerPostExtract(appName, sourceWorkDir)
 	case "report":
 		appName := flag.Arg(0)
 		err = buildpacks.ReportSingleApp(appName, "")

plugins/buildpacks/subcommands.go

@@ -138,3 +138,18 @@ func CommandSet(appName string, buildpack string, index int) error {
 
 	return common.PropertyListSet("buildpacks", appName, "buildpacks", buildpack, index)
 }
+
+// CommandSetProperty implements buildpacks:set-property
+func CommandSetProperty(appName string, property string, value string) error {
+	oldStack := ""
+	if property == "stack" {
+		oldStack = common.PropertyGet("buildpacks", appName, "stack")
+	}
+
+	common.CommandPropertySet("buildpacks", appName, property, value, DefaultProperties, GlobalProperties)
+	if property == "stack" && oldStack != value {
+		return common.PlugnTrigger("post-stack-set", []string{appName, value}...)
+	}
+
+	return nil
+}

plugins/buildpacks/triggers.go

@@ -5,15 +5,41 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/dokku/dokku/plugins/common"
 )
 
-// TriggerInstall runs the install step for the buildpacks plugin
+// TriggerBuildpackStackName echos the stack name for the app
-func TriggerInstall() {
+func TriggerBuildpackStackName(appName string) error {
-	if err := common.PropertySetup("buildpacks"); err != nil {
+	if stack := common.PropertyGetDefault("buildpacks", appName, "stack", ""); stack != "" {
-		common.LogFail(fmt.Sprintf("Unable to install the buildpacks plugin: %s", err.Error()))
+		fmt.Println(stack)
+		return nil
 	}
+
+	if stack := common.PropertyGetDefault("buildpacks", "--global", "stack", ""); stack != "" {
+		fmt.Println(stack)
+		return nil
+	}
+
+	b, _ := common.PlugnTriggerOutput("config-get", []string{appName, "DOKKU_IMAGE"}...)
+	dokkuImage := strings.TrimSpace(string(b[:]))
+	if dokkuImage != "" {
+		common.LogWarn("Deprecated: use buildpacks:set-property instead of specifying DOKKU_IMAGE environment variable")
+		fmt.Println(dokkuImage)
+		return nil
+	}
+
+	return nil
+}
+
+// TriggerInstall runs the install step for the buildpacks plugin
+func TriggerInstall() error {
+	if err := common.PropertySetup("buildpacks"); err != nil {
+		return fmt.Errorf("Unable to install the buildpacks plugin: %s", err.Error())
+	}
+
+	return nil
 }
 
 // TriggerPostAppCloneSetup creates new buildpacks files
@@ -40,29 +66,25 @@ func TriggerPostAppRenameSetup(oldAppName string, newAppName string) error {
 }
 
 // TriggerPostDelete destroys the buildpacks property for a given app container
-func TriggerPostDelete(appName string) {
+func TriggerPostDelete(appName string) error {
-	err := common.PropertyDestroy("buildpacks", appName)
+	return common.PropertyDestroy("buildpacks", appName)
-	if err != nil {
-		common.LogFail(err.Error())
-	}
 }
 
 // TriggerPostExtract writes a .buildpacks file into the app
-func TriggerPostExtract(appName string, sourceWorkDir string) {
+func TriggerPostExtract(appName string, sourceWorkDir string) error {
 	buildpacks, err := common.PropertyListGet("buildpacks", appName, "buildpacks")
 	if err != nil {
-		return
+		return nil
 	}
 
 	if len(buildpacks) == 0 {
-		return
+		return nil
 	}
 
 	buildpacksPath := filepath.Join(sourceWorkDir, ".buildpacks")
 	file, err := os.OpenFile(buildpacksPath, os.O_RDWR|os.O_TRUNC|os.O_CREATE, 0600)
 	if err != nil {
-		common.LogFail(fmt.Sprintf("Error writing .buildpacks file: %s", err.Error()))
+		return fmt.Errorf("Error writing .buildpacks file: %s", err.Error())
-		return
 	}
 
 	w := bufio.NewWriter(file)
@@ -71,8 +93,9 @@ func TriggerPostExtract(appName string, sourceWorkDir string) {
 	}
 
 	if err = w.Flush(); err != nil {
-		common.LogFail(fmt.Sprintf("Error writing .buildpacks file: %s", err.Error()))
+		return fmt.Errorf("Error writing .buildpacks file: %s", err.Error())
-		return
 	}
 	file.Chmod(0600)
+
+	return nil
 }

plugins/common/functions

@@ -713,9 +713,6 @@ dokku_receive() {
   local DOKKU_CNB_EXPERIMENTAL="$(config_get "$APP" DOKKU_CNB_EXPERIMENTAL || true)"
   if [[ "$DOKKU_CNB_EXPERIMENTAL" == "1" ]]; then
     IMAGE_SOURCE_TYPE="cnb"
-    dokku_log_info1 "Building $APP from $IMAGE_SOURCE_TYPE (experimental)..."
-  else
-    dokku_log_info1 "Building $APP from $IMAGE_SOURCE_TYPE..."
   fi
 
   DOKKU_QUIET_OUTPUT=1 config_set --no-restart "$APP" DOKKU_APP_TYPE="$IMAGE_SOURCE_TYPE"

plugins/logs/logs.go

@@ -10,7 +10,7 @@ import (
 const MaxSize = "10m"
 
 var (
-	// DefaultProperties is a map of all valid ps properties with corresponding default property values
+	// DefaultProperties is a map of all valid logs properties with corresponding default property values
 	DefaultProperties = map[string]string{
 		"max-size":    "",
 		"vector-sink": "",

plugins/repo/.gitignore

@@ -3,3 +3,4 @@
 /triggers/*
 /triggers
 /pre-delete
+/post-stack-set

plugins/repo/Makefile

@@ -1,5 +1,5 @@
 SUBCOMMANDS = subcommands/gc subcommands/purge-cache
-TRIGGERS = triggers/pre-delete
+TRIGGERS = triggers/post-stack-set triggers/pre-delete
 BUILD = commands subcommands triggers
 PLUGIN_NAME = repo
 

plugins/repo/src/triggers/triggers.go

@@ -18,6 +18,9 @@ func main() {
 
 	var err error
 	switch trigger {
+	case "post-stack-set":
+		appName := flag.Arg(0)
+		err = repo.PurgeCache(appName)
 	case "pre-delete":
 		appName := flag.Arg(0)
 		err = repo.PurgeCache(appName)