feat(startup): add the DB_WAIT environment var

Dockerfile

@@ -14,6 +14,7 @@ ENV GID=991 \
     DB_USER=flarum \
     DB_NAME=flarum \
     DB_PORT=3306 \
+    DB_WAIT=false \
     FLARUM_TITLE=Docker-Flarum \
     DEBUG=false \
     LOG_TO_STDOUT=false \

README.md

@@ -53,6 +53,7 @@
 | **DB_PASS** | MariaDB database password | **required** | none
 | **DB_PREF** | Flarum tables prefix | *optional* | none
 | **DB_PORT** | MariaDB database port | *optional* | 3306
+| **DB_WAIT** | Wait database live | *optional* | false
 | **FLARUM_PORT** | Port to run Flarum on inside the container | *optional* | 8888
 | **UPLOAD_MAX_SIZE** | The maximum size of an uploaded file | *optional* | 50M
 | **PHP_MEMORY_LIMIT** | PHP memory limit | *optional* | 128M |

rootfs/usr/local/bin/startup

@@ -66,21 +66,23 @@ if [ -f '/flarum/app/extensions/composer.repositories.txt' ]; then
 fi
 
 # Wait database live
-test_count=0
-test_db(){
-  db-live-test --dsn "mysql:host=${DB_HOST};port=${DB_PORT};database=${DB_NAME}" \
-    --user ${DB_USER} \
-    --password ${DB_PASS}
-}
-echo "[INFO] Waiting for the database live..."
-until test_db; do
-  if [ "${test_count}" = 40 ]; then
-    echo "[ERROR] The database not live!" >&2
-    exit 75
-  fi
-  test_count=$(($test_count + 1))
-  sleep 1
-done
+if [ "${DB_WAIT}" = 'true' ]; then
+  test_count=0
+  test_db(){
+    db-live-test --dsn "mysql:host=${DB_HOST};port=${DB_PORT};database=${DB_NAME}" \
+      --user ${DB_USER} \
+      --password ${DB_PASS}
+  }
+  echo "[INFO] Waiting for the database live..."
+  until test_db; do
+    if [ "${test_count}" = 40 ]; then
+      echo "[ERROR] The database not live!" >&2
+      exit 75
+    fi
+    test_count=$(($test_count + 1))
+    sleep 1
+  done
+fi
 
 # if installation was performed before
 if [ -e '/flarum/app/public/assets/rev-manifest.json' ] || [ -e '/flarum/app/public/assets/._flarum-installed.lock' ] ; then