From d7dfc5d30bdd50e78ba733ef22a084c05215ffae Mon Sep 17 00:00:00 2001
From: Vincent Boisard <boisard.v@gmail.com>
Date: Thu, 13 Jan 2022 19:42:11 +0100
Subject: [PATCH 1/2] Purge cache for all apps when calling
 buildpacks:set-property with --global flag

---
 plugins/buildpacks/subcommands.go | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/plugins/buildpacks/subcommands.go b/plugins/buildpacks/subcommands.go
index c3c427ea5..9a49ffabc 100644
--- a/plugins/buildpacks/subcommands.go
+++ b/plugins/buildpacks/subcommands.go
@@ -148,7 +148,19 @@ func CommandSetProperty(appName string, property string, value string) error {
 
 	common.CommandPropertySet("buildpacks", appName, property, value, DefaultProperties, GlobalProperties)
 	if property == "stack" && oldStack != value {
-		return common.PlugnTrigger("post-stack-set", []string{appName, value}...)
+		if appName != "--global" {
+			return common.PlugnTrigger("post-stack-set", []string{appName, value}...)
+		}
+
+		apps, err := common.DokkuApps()
+		if err != nil {
+			return err
+		}
+		for _, app := range apps {
+			if err := common.PlugnTrigger("post-stack-set", []string{app, value}...); err != nil {
+				return err
+			}
+		}
 	}
 
 	return nil

From cf4eed2de055b373328d0ac8d8c1d9076fb88b22 Mon Sep 17 00:00:00 2001
From: Vincent Boisard <boisard.v@gmail.com>
Date: Thu, 13 Jan 2022 23:21:57 +0100
Subject: [PATCH 2/2] Add test for buildpacks:set-property --global

---
 tests/unit/buildpacks.bats | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/tests/unit/buildpacks.bats b/tests/unit/buildpacks.bats
index 898032608..3382a8a88 100644
--- a/tests/unit/buildpacks.bats
+++ b/tests/unit/buildpacks.bats
@@ -184,6 +184,13 @@ teardown() {
   assert_output "https://github.com/heroku/heroku-buildpack-golang.git https://github.com/heroku/heroku-buildpack-python.git https://github.com/heroku/heroku-buildpack-php.git"
 }
 
+@test "(buildpacks) buildpacks:set-property" {
+  run /bin/bash -c "dokku buildpacks:set-property --global stack gliderlabs/herokuish:latest"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+}
+
 @test "(buildpacks) buildpacks:remove" {
   run /bin/bash -c "dokku buildpacks:set $TEST_APP heroku/nodejs"
   echo "output: $output"