Try reproduce #228

Author: Julien Neuhart

build-and-test.sh

@@ -19,6 +19,10 @@ docker run --rm test/slim_onbuild php -m | grep pdo_pgsql
 docker run --rm test/slim_onbuild php -m | grep pdo_sqlite
 docker rmi test/slim_onbuild
 
+# Let's check that the extensions are available for composer using "ARG PHP_EXTENSIONS" statement:
+docker build -t test/slim_onbuild_composer --build-arg PHP_VERSION="${PHP_VERSION}" --build-arg BRANCH="$BRANCH" --build-arg BRANCH_VARIANT="$BRANCH_VARIANT" tests/slim_onbuild_composer
+docker rmi test/slim_onbuild_composer
+
 # Post build unit tests
 if [[ $VARIANT == cli* ]]; then CONTAINER_CWD=/usr/src/app; else CONTAINER_CWD=/var/www/html; fi
 # Default user is 1000

tests/slim_onbuild_composer/Dockerfile

@@ -0,0 +1,11 @@
+ARG BRANCH
+ARG BRANCH_VARIANT
+ARG PHP_VERSION
+
+ARG PHP_EXTENSIONS="gd"
+FROM thecodingmachine/php:${PHP_VERSION}-${BRANCH}-slim-${BRANCH_VARIANT}
+
+COPY composer.json composer.json
+
+# Let's check that GD is available.
+RUN composer install

tests/slim_onbuild_composer/composer.json

@@ -0,0 +1,5 @@
+{
+  "require": {
+    "ext-gd": "*"
+  }
+}