Add Docker support for local development

CONTRIBUTING.md

@@ -0,0 +1,28 @@
+# Contributing
+
+Contributions are **welcome** and will be fully **credited**.
+
+We accept contributions via Pull Requests on [Github](https://github.com/ICanBoogie/Inflector).
+
+## Pull Requests
+
+- **Add tests!** — Your contribution won't be accepted if it doesn't have tests.
+- **Document any change in behaviour** — Make sure the `README.md` and any other relevant documentation are kept
+  up-to-date.
+- **Consider our release cycle** — We follow [SemVer v2.0.0](http://semver.org/). Randomly breaking public APIs is not
+  an option.
+- **Create feature branches** — We won't pull from your main branch.
+- **One pull request per feature** — If you want to do more than one thing, send multiple pull requests.
+- **Send coherent history** — Make sure each individual commit in your pull request is meaningful. If you had to make
+  multiple intermediate commits while developing, please [squash them][git-squash] before submitting.
+
+## Running Tests
+
+We provide a Docker container for local development. Run `make test-container` to create a new session. Inside the
+container run `make test` to run the test suite. Alternatively, run `make test-coverage` for a breakdown of the code
+coverage. The coverage report is available in `build/coverage/index.html`.
+
+**Thanks for your contribution**!
+
+
+[git-squash]: http://www.git-scm.com/book/en/v2/Git-Tools-Rewriting-History#Changing-Multiple-Commit-Messages

Dockerfile

@@ -0,0 +1,18 @@
+ARG PHP_VERSION
+FROM php:${PHP_VERSION}-cli-alpine
+
+RUN apk add --no-cache make && \
+    docker-php-ext-enable opcache && \
+    docker-php-source delete
+
+RUN echo $'\
+display_errors=On\n\
+error_reporting=E_ALL\n\
+date.timezone=UTC\n\
+' >> /usr/local/etc/php/conf.d/php.ini
+
+ENV COMPOSER_ALLOW_SUPERUSER 1
+
+RUN curl -s https://raw.githubusercontent.com/composer/getcomposer.org/76a7060ccb93902cd7576b67264ad91c8a2700e2/web/installer | php -- --quiet && \
+    mv composer.phar /usr/local/bin/composer && \
+    echo $'export PATH="$HOME/.composer/vendor/bin:$PATH"\n' >> /root/.profile

Makefile

@@ -24,3 +24,13 @@ test-coverage: test-dependencies
 test-coveralls: test-dependencies
 	@mkdir -p build/logs
 	@$(PHPUNIT) --coverage-clover build/logs/clover.xml
+
+.PHONY: test-container-56
+test-container-56:
+	@docker-compose run --rm app56 sh
+	@docker-compose down
+
+.PHONY: test-container-74
+test-container-74:
+	@docker-compose run --rm app74 sh
+	@docker-compose down

README.md

@@ -381,6 +381,12 @@ The project is continuously tested by [GitHub actions](https://github.com/ICanBo
 
 
 
+## Contributing
+
+Please see [CONTRIBUTING](CONTRIBUTING.md) for details.
+
+
+
 ## License
 
 **ICanBoogie/DateTime** is released under the [BSD-3-Clause](LICENSE).

docker-compose.yaml

@@ -0,0 +1,25 @@
+---
+version: "3.0"
+services:
+  app56:
+    build:
+      context: .
+      args:
+        PHP_VERSION: 5.6
+    environment:
+      PHP_IDE_CONFIG: "serverName=icanboogie-datetime"
+    volumes:
+      - .:/app:delegated
+      - ~/.composer:/root/.composer:delegated
+    working_dir: /app
+  app74:
+    build:
+      context: .
+      args:
+        PHP_VERSION: 7.4
+    environment:
+      PHP_IDE_CONFIG: "serverName=icanboogie-datetime"
+    volumes:
+      - .:/app:delegated
+      - ~/.composer:/root/.composer:delegated
+    working_dir: /app