Prepare for Alpine support

.travis.yml

@@ -1,5 +1,8 @@
 sudo: false
 
+notifications:
+  email: false
+
 branches:
   only:
     - master
@@ -7,16 +10,24 @@ branches:
 services:
   - docker
 
-env:
-  global:
+test-extensions-job-template: &test-extensions-job-template
+  stage: Test extensions
+  if: type = pull_request
+  script: ./scripts/travisci-test-extensions
+
+jobs:
+  include:
+    - <<: *test-extensions-job-template
+      name: Test extensions on Alpine Linux
+      env: DOCKER_DISTRO=alpine
+
+    - <<: *test-extensions-job-template
+      name: Test extensions on Debian Linux
+      env: DOCKER_DISTRO=debian
+
+    - stage: Update docs
+      name: Update README.md
+      if: branch = master AND type = push
+      env:
         - secure: "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"
-
-install:
-  - true
-
-script:
-  - if test "${TRAVIS_EVENT_TYPE:-}" = 'pull_request'; then ./scripts/travisci-test-new-extensions; fi
-  - if test "${TRAVIS_EVENT_TYPE:-}" = 'push' && test "${TRAVIS_BRANCH:-}" = 'master'; then ./scripts/travisci-update-readme; fi
-
-notifications:
-  email: false
+      script: ./scripts/travisci-update-readme

README.md

@@ -4,10 +4,7 @@
 
 This repository contains a script that can be used to easily install a PHP extension inside the [official PHP Docker images](https://hub.docker.com/_/php/).
 
-
-## Known limits
-
-Currently the script requires the Debian-based images (no Alpine).
+The script works both for Alpine and Debian Linux.
 
 
 ## Usage
@@ -157,3 +154,8 @@ Some extension has special requirements:
   
   Test: gd, zip
   ```
+
+
+## Do you want to really say thank you?
+
+You can offer me a [monthly coffee](https://github.com/sponsors/mlocati) or a [one-time coffee](https://paypal.me/mlocati) :wink:

scripts/travisci-test-extensions

@@ -26,20 +26,28 @@ fi
 #
 # Outputs:
 # the full docker image ID
-getExtensionImage () {
+getDockerImageName () {
 	case "${2}" in
 		*)
-			getExtensionImage_version="${2}"
+			getDockerImageName_version="${2}"
 			;;
 	esac
-	getExtensionImage_result="php:${getExtensionImage_version}-cli"
-	getExtensionImage_reqs="${TRAVIS_BUILD_DIR}/data/special-requirements"
-	if test -f "${getExtensionImage_reqs}"; then
-		if test -n "$(cat "${getExtensionImage_reqs}" | grep -E "^${1}[ \t]+zts[ \t]*$")"; then
-			getExtensionImage_result="php:${getExtensionImage_version}-zts"
+	getDockerImageName_suffix='-cli'
+	getDockerImageName_reqs="${TRAVIS_BUILD_DIR}/data/special-requirements"
+	if test -f "${getDockerImageName_reqs}"; then
+		if test -n "$(cat "${getDockerImageName_reqs}" | grep -E "^${1}[ \t]+zts[ \t]*$")"; then
+			getDockerImageName_suffix="-zts"
 		fi
 	fi
-	printf '%s' "${getExtensionImage_result}"
+	case "${DOCKER_DISTRO:-}" in
+		alpine)
+			getDockerImageName_distro="-$DOCKER_DISTRO"
+			;;
+		*)
+			getDockerImageName_distro=''
+			;;
+	esac
+	printf 'php:%s%s%s' "${getDockerImageName_version}" "${getDockerImageName_suffix}" "${getDockerImageName_distro}"
 }
 
 
@@ -58,10 +66,10 @@ testExtension () {
 		printf '  INVALID PHP VERSION: %s\n' "${2}" >&2
 		return 1
 	fi
-	testExtension_Image="$(getExtensionImage "${1}" "${2}")"
+	testExtension_Image="$(getDockerImageName "${1}" "${2}")"
 	printf ' - Docker image: %s\n' "${testExtension_Image}"
 	testExtension_out=`mktemp`
-	if $(docker run --rm --volume "${TRAVIS_BUILD_DIR}:/app" --workdir /app "${testExtension_Image}" bash -c "./install-php-extensions '${1}' && php ./scripts/check-installed-extension.php '${1}'" >"${testExtension_out}" 2>&1); then
+	if $(docker run --rm --volume "${TRAVIS_BUILD_DIR}:/app" --workdir /app "${testExtension_Image}" sh -c "./install-php-extensions --cleanup '${1}' && php ./scripts/check-installed-extension.php '${1}'" >"${testExtension_out}" 2>&1); then
 		rm -rf "${testExtension_out}"
 		printf ' - Passed\n'
 		return 0