Install pcov only if needed

Author: marc-mabe

.github/workflows/test.Dockerfile

@@ -8,11 +8,3 @@ RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local
 ENV COMPOSER_ALLOW_SUPERUSER=1
 ENV COMPOSER_HTACCESS_PROTECT=0
 ENV COMPOSER_CACHE_DIR=/.composer
-
-# install PHP extension pcov
-RUN apk add --no-cache --virtual .build-deps $PHPIZE_DEPS \
-    && mkdir -p /usr/src/php/ext/pcov && curl -fsSL https://pecl.php.net/get/pcov | tar xvz -C /usr/src/php/ext/pcov --strip 1 \
-    && docker-php-ext-install pcov \
-    && docker-php-ext-enable pcov \
-    && rm -Rf /usr/src/php/ext/pcov \
-    && apk del --no-cache .build-deps

.github/workflows/test.yml

@@ -95,7 +95,12 @@ jobs:
       - name: Run Unit Test
         run: |
           if [ "${{ matrix.CODE_COVERAGE }}" == "true" ]; then
-            docker run --rm -u "$(id -u):$(id -g)" -v "$(pwd):/workdir" 'test:${{ matrix.PHP_VERSION }}' php -d 'zend.assertions=1' -d 'pcov.enabled=1' ./vendor/bin/phpunit --coverage-clover=.clover.xml
+            docker run --rm -u "$(id -u):$(id -g)" -v "$(pwd):/workdir" 'test:${{ matrix.PHP_VERSION }}' \
+              apk add --no-cache --virtual .build-deps $PHPIZE_DEPS \
+              && mkdir -p /usr/src/php/ext/pcov && curl -fsSL https://pecl.php.net/get/pcov | tar xvz -C /usr/src/php/ext/pcov --strip 1 \
+              && docker-php-ext-install pcov \
+              && docker-php-ext-enable pcov \
+              && php -d 'zend.assertions=1' -d 'pcov.enabled=1' ./vendor/bin/phpunit --coverage-clover=.clover.xml
           else
             docker run --rm -u "$(id -u):$(id -g)" -v "$(pwd):/workdir" 'test:${{ matrix.PHP_VERSION }}' php -d 'zend.assertions=1' ./vendor/bin/phpunit
           fi