feat: cleanup IP and PORT files on app clone

plugins/network/.gitignore

@@ -3,6 +3,7 @@
 /triggers/*
 /network-*
 /install
+/post-app-clone-setup
 /post-create
 /post-delete
-/report
+/report

plugins/network/Makefile

@@ -3,7 +3,7 @@ include ../../common.mk
 GO_ARGS ?= -a
 
 SUBCOMMANDS = subcommands/rebuild subcommands/rebuildall subcommands/report subcommands/set
-TRIGGERS = triggers/install triggers/network-build-config triggers/network-compute-ports triggers/network-config-exists triggers/network-get-ipaddr triggers/network-get-listeners triggers/network-get-port triggers/network-get-property triggers/network-write-ipaddr triggers/network-write-port triggers/post-create triggers/post-delete triggers/report
+TRIGGERS = triggers/install triggers/network-build-config triggers/network-compute-ports triggers/network-config-exists triggers/network-get-ipaddr triggers/network-get-listeners triggers/network-get-port triggers/network-get-property triggers/network-write-ipaddr triggers/network-write-port triggers/post-app-clone-setup triggers/post-create triggers/post-delete triggers/report
 build-in-docker: clean
 	docker run --rm \
 		-v $$PWD/../..:$(GO_REPO_ROOT) \

plugins/network/network.go

@@ -180,6 +180,29 @@ func HasNetworkConfig(appName string) bool {
 	return common.FileExists(ipfile) && common.FileExists(portfile)
 }
 
+// PostAppCloneSetup removes old IP and PORT files for a newly cloned app
+func PostAppCloneSetup(appName string) bool {
+	dokkuRoot := common.MustGetEnv("DOKKU_ROOT")
+	appRoot := strings.Join([]string{dokkuRoot, appName}, "/")
+	success := true
+
+	ipFiles, _ := filepath.Glob(appRoot + "/IP.*")
+	for _, file := range ipFiles {
+		if err := os.Remove(file); err != nil {
+			common.LogWarn(fmt.Sprintf("Unable to remove file %s", file))
+			success = false
+		}
+	}
+	portFiles, _ := filepath.Glob(appRoot + "/PORT.*")
+	for _, file := range portFiles {
+		if err := os.Remove(file); err != nil {
+			common.LogWarn(fmt.Sprintf("Unable to remove file %s", file))
+			success = false
+		}
+	}
+	return success
+}
+
 // ReportSingleApp is an internal function that displays the app report for one or more apps
 func ReportSingleApp(appName, infoFlag string) {
 	if err := common.VerifyAppName(appName); err != nil {

plugins/network/src/triggers/post-app-clone-setup/post-app-clone-setup.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"flag"
+	"os"
+
+	"github.com/dokku/dokku/plugins/network"
+)
+
+// cleanup network files for a new app clone
+func main() {
+	flag.Parse()
+	appName := flag.Arg(1)
+
+	success := network.PostAppCloneSetup(appName)
+	if !success {
+		os.Exit(1)
+	}
+}