feat: add command to list linked services for a given app

README.md

@@ -17,6 +17,7 @@ sudo dokku plugin:install https://github.com/dokku/dokku-postgres.git postgres
 ## commands
 
 ```
+postgres:app-links <app>          List all postgres service links for a given app
 postgres:backup <name> <bucket> (--use-iam) Create a backup of the postgres service to an existing s3 bucket
 postgres:backup-auth <name> <aws_access_key_id> <aws_secret_access_key> (<aws_default_region>) (<aws_signature_version>) (<endpoint_url>) Sets up authentication for backups on the postgres service
 postgres:backup-deauth <name>     Removes backup authentication for the postgres service

common-functions

@@ -118,6 +118,22 @@ service_alternative_alias() {
   echo "$ALIAS"
 }
 
+service_app_links() {
+  declare desc="Outputs all service links for a given app"
+  declare APP="$1"
+  local SERVICE LINKED_APP
+
+  pushd "$PLUGIN_DATA_ROOT" > /dev/null
+  for SERVICE in *; do
+    [[ -f "$SERVICE/LINKS" ]] || continue
+    for LINKED_APP in $(<"$SERVICE/LINKS"); do
+      if [[ "$LINKED_APP" == "$APP" ]] ; then
+        echo "$SERVICE"
+      fi
+    done
+  done
+}
+
 service_backup() {
   declare desc="Creates a backup of a service to an existing s3 bucket"
   declare SERVICE="$1" BUCKET_NAME="$2" USE_IAM_OPTIONAL_FLAG="$3"

subcommands/app-links

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/config"
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+source "$PLUGIN_BASE_PATH/common/functions"
+source "$(dirname "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)")/functions"
+
+service-app-links-cmd() {
+  #E list all $PLUGIN_COMMAND_PREFIX services that are linked to the 'playground' app.
+  #E dokku $PLUGIN_COMMAND_PREFIX:app-links playground
+  #A app, app to run command against
+  declare desc="list all $PLUGIN_SERVICE service links for a given app"
+  local cmd="$PLUGIN_COMMAND_PREFIX:app-links" argv=("$@"); [[ ${argv[0]} == "$cmd" ]] && shift 1
+  declare APP="$1"
+  APP=${APP:="$DOKKU_APP_NAME"}
+
+  [[ -z "$APP" ]] && dokku_log_fail "Please specify an app to run the command on"
+  verify_app_name "$APP"
+  service_app_links "$APP"
+}
+
+service-app-links-cmd "$@"