use a new Docker arg to control composer install command flags

Dockerfile

@@ -34,10 +34,11 @@ RUN curl https://raw.githubusercontent.com/silinternational/s3-expand/1.5/s3-exp
 WORKDIR /data
 
 # Install/cleanup composer dependencies
+ARG COMPOSER_FLAGS="--prefer-dist --no-interaction --no-dev --optimize-autoloader --no-scripts --no-progress"
 COPY composer.json /data/
 COPY composer.lock /data/
 RUN composer self-update --no-interaction
-RUN COMPOSER_ALLOW_SUPERUSER=1 composer install --prefer-dist --no-interaction --no-dev --optimize-autoloader --no-scripts --no-progress
+RUN COMPOSER_ALLOW_SUPERUSER=1 composer install $COMPOSER_FLAGS
 
 ENV SSP_PATH /data/vendor/simplesamlphp/simplesamlphp
 

docker-compose.yml

@@ -19,7 +19,10 @@ services:
       PMA_PASSWORD: silauth
 
   test:
-    build: .
+    build:
+      context: .
+      args:
+        COMPOSER_FLAGS: "--no-interaction --no-progress"
     depends_on:
       - ssp-hub.local
       - ssp-idp1.local

dockerbuild/run-integration-tests.sh

@@ -7,7 +7,6 @@ set -x
 set -e
 
 cd /data
-export COMPOSER_ALLOW_SUPERUSER=1; composer install
 
 whenavail "ssp-hub.local"  80 15 echo Hub ready
 whenavail "ssp-idp1.local" 80 5 echo IDP 1 ready

dockerbuild/run-metadata-tests.sh

@@ -7,6 +7,5 @@ set -x
 set -e
 
 cd /data
-export COMPOSER_ALLOW_SUPERUSER=1; composer install
 
 ./vendor/bin/phpunit -v tests/MetadataTest.php