refactor: move app.json script execution into it's own plugin

Rather than have this live in 00_dokku-standard, move it out so that it may start to support various other features around the app.json manifest.

plugins/app-json/plugin.toml

@@ -0,0 +1,4 @@
+[plugin]
+description = "dokku core app-json plugin"
+version = "0.13.4"
+[plugin.config]

plugins/app-json/post-deploy

@@ -2,11 +2,11 @@
 set -eo pipefail
 [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
-source "$PLUGIN_CORE_AVAILABLE_PATH/00_dokku-standard/exec-app-json-scripts"
+source "$PLUGIN_CORE_AVAILABLE_PATH/app-json/internal-functions"
 
-exec_app_json_scripts() {
-  declare desc="core app.json scripts execution"
-  local trigger="post-deploy app_json_scripts"
+app_json_post_deploy() {
+  declare desc="app-json scripts execution"
+  local trigger="app_json_post_deploy"
   local APP="$1"
   local IMAGE_TAG="$4"
   local PHASE_SCRIPT_KEY="postdeploy"
@@ -15,4 +15,4 @@ exec_app_json_scripts() {
   execute_script "$APP" "$IMAGE_TAG" "$PHASE_SCRIPT_KEY"
 }
 
-exec_app_json_scripts "$@"
+app_json_post_deploy "$@"

plugins/app-json/pre-deploy

@@ -2,11 +2,11 @@
 set -eo pipefail
 [[ $DOKKU_TRACE ]] && set -x
 source "$PLUGIN_CORE_AVAILABLE_PATH/common/functions"
-source "$PLUGIN_CORE_AVAILABLE_PATH/00_dokku-standard/exec-app-json-scripts"
+source "$PLUGIN_CORE_AVAILABLE_PATH/app-json/internal-functions"
 
-exec_app_json_scripts() {
-  declare desc="core app.json scripts execution"
-  local trigger="pre-deploy app_json_scripts"
+app_json_pre_deploy() {
+  declare desc="app-json scripts execution"
+  local trigger="app_json_pre_deploy"
   local APP="$1"
   local IMAGE_TAG="$2"
   local PHASE_SCRIPT_KEY="predeploy"
@@ -15,4 +15,4 @@ exec_app_json_scripts() {
   execute_script "$APP" "$IMAGE_TAG" "$PHASE_SCRIPT_KEY"
 }
 
-exec_app_json_scripts "$@"
+app_json_pre_deploy "$@"