Improve overall php and dependencies support (#15)

* Add PHP 8 support.
 * Add PHP 7.2 support.
 * Add pipeline for running tests.
 * Replace `endclothing/prometheus_client_php` dependency with the more
 up-to-date `promphp/prometheus_client_php` lib.
 * Update changelog.
 * Add support for Guzzle 6 and 7.
 * Drop Laravel 6 support and add support for Laravel 8.

.docker/Dockerfile

@@ -0,0 +1,17 @@
+ARG PHP_VERSION="7.3"
+
+FROM php:${PHP_VERSION}-cli
+
+WORKDIR /application
+
+RUN php -r "readfile('http://getcomposer.org/installer');" | php -- --install-dir=/usr/bin/ --filename=composer
+
+RUN pecl install xdebug && docker-php-ext-enable xdebug
+
+RUN apt-get update \
+    && apt-get install -y git libzip-dev \
+    && docker-php-ext-install zip \
+    && pecl install redis apcu \
+    && docker-php-ext-enable redis zip apcu
+
+COPY .docker/php-ini-overrides.ini /usr/local/etc/php/conf.d/99-overrides.ini

.docker/php-ini-overrides.ini

@@ -0,0 +1,13 @@
+memory_limit=-1
+
+xdebug.mode=debug
+xdebug.start_with_request=yes
+xdebug.client_port=9003
+xdebug.discover_client_host=1
+
+apc.enable_cli=true
+
+[Date]
+; Defines the default timezone used by the date functions
+; http://php.net/date.timezone
+date.timezone = America/Sao_Paulo

.gitattributes

@@ -1 +1,3 @@
 /examples export-ignore
+/bin export-ignore
+/.docker export-ignore

.github/workflows/main.yml

@@ -0,0 +1,38 @@
+name: Build
+
+on:
+  pull_request:
+  push:
+    branches: [ master ]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        php: ["7.2", "7.3", "7.4", "8.0"]
+    runs-on: ubuntu-latest
+    container: arquivei/laravel-prometheus-exporter:${{ matrix.php }}
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Get Composer Cache Directory
+        id: composer-cache
+        run: |
+          echo "::set-output name=dir::$(composer config cache-files-dir)"
+      - name: Cache composer dependencies
+        uses: actions/cache@v2
+        with:
+          path: ${{ steps.composer-cache.outputs.dir }}
+          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-composer-
+      - name: Install composer dependencies
+        run: composer install
+
+      - name: Run checks
+        run: php vendor/bin/phpunit
+
+      - name: Run checks in lower versions
+        run: |
+          composer update --prefer-lowest --prefer-dist --prefer-stable --no-interaction
+          php vendor/bin/phpunit

.github/workflows/publish.yml

@@ -0,0 +1,24 @@
+name: Publish docker images
+
+on:
+  workflow_dispatch:
+
+jobs:
+  publish:
+    strategy:
+      matrix:
+        php: ["7.2", "7.3", "7.4", "8.0"]
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Push to Docker Hub
+        uses: docker/build-push-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          repository: arquivei/laravel-prometheus-exporter
+          push: true
+          context: .
+          file: ./.docker/Dockerfile
+          tags: ${{ matrix.php }}

.gitignore

@@ -1,8 +1,8 @@
 .idea
 composer.lock
 vendor
-bin
 coverage
 coverage.xml
 .php_cs.cache
 examples/lumen-app/vendor
+.phpunit.cache

Makefile

@@ -0,0 +1,38 @@
+PHP_VERSION ?= 7.3
+PHP ?= bin/php -d "xdebug.mode=off"
+COMPOSER ?= bin/composer
+
+.PHONY: setup
+setup:
+	DOCKER_BUILDKIT=1 docker build -f .docker/Dockerfile -t laravel-prometheus-exporter:7.2 --build-arg PHP_VERSION=7.2 .
+	DOCKER_BUILDKIT=1 docker build -f .docker/Dockerfile -t laravel-prometheus-exporter:7.3 --build-arg PHP_VERSION=7.3 .
+	DOCKER_BUILDKIT=1 docker build -f .docker/Dockerfile -t laravel-prometheus-exporter:7.4 --build-arg PHP_VERSION=7.4 .
+	DOCKER_BUILDKIT=1 docker build -f .docker/Dockerfile -t laravel-prometheus-exporter:8.0 --build-arg PHP_VERSION=8.0 .
+
+.PHONY: publish
+publish: publish-7.2 publish-7.3 publish-7.4 publish-8.0
+
+.PHONY: publish-%
+publish-%:
+	docker tag laravel-prometheus-exporter:${*} arquivei/laravel-prometheus-exporter:${*}
+	docker push arquivei/laravel-prometheus-exporter:${*}
+
+.PHONY: vendor
+vendor:
+	PHP_VERSION=$(PHP_VERSION) $(COMPOSER) install
+
+.PHONY: tests
+tests:
+	PHP_VERSION=$(PHP_VERSION) $(PHP) vendor/bin/phpunit
+
+.PHONY: ci-local
+ci-local: ci-local-7.2 ci-local-7.3 ci-local-7.4 ci-local-8.0
+
+ci-local-%:
+	rm -rf composer.lock vendor/
+
+	PHP_VERSION=${*} $(COMPOSER) install
+	PHP_VERSION=${*} $(PHP) vendor/bin/phpunit
+
+	PHP_VERSION=${*} $(COMPOSER) update --prefer-lowest --prefer-dist --prefer-stable --no-interaction
+	PHP_VERSION=${*} $(PHP) vendor/bin/phpunit

bin/composer

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+set -e
+
+command -v docker >/dev/null 2>&1 || { echo "docker is required to run this binary. Aborting." >&2; exit 1; }
+
+USER=${USER:-$( id -un )}
+GROUP=${GROUP:-$( id -gn )}
+COMPOSER_HOME=${COMPOSER_HOME:-${HOME}/.composer}
+DOCKER_OPTS=${DOCKER_OPTS:-'-it'}
+PHP_VERSION=${PHP_VERSION:-7.3}
+
+exec docker run ${DOCKER_OPTS} --rm \
+    -u $( id -u ${USER} ):$( id -g ${USER} ) \
+    -v "${PWD}":"/application" \
+    -v "${COMPOSER_HOME}":/tmp/composer \
+    -w "/application" \
+    -e COMPOSER_HOME="/tmp/composer" \
+    --net=host --sig-proxy=true --pid=host \
+    --entrypoint="php" \
+     laravel-prometheus-exporter:"${PHP_VERSION}" -d "xdebug.mode=off" /usr/bin/composer "${@}"
+

bin/php

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+
+set -e
+
+command -v docker >/dev/null 2>&1 || { echo "docker is required to run this binary. Aborting." >&2; exit 1; }
+
+USER=${USER:-$( id -un )}
+GROUP=${GROUP:-$( id -gn )}
+DOCKER_OPTS=${DOCKER_OPTS:-'-it'}
+PHP_VERSION=${PHP_VERSION:-7.3}
+
+exec docker run ${DOCKER_OPTS} --rm \
+    -u $( id -u ${USER} ):$( id -g ${USER} ) \
+    -v "${PWD}":"/application" \
+    -w "/application" \
+    -e PHP_IDE_CONFIG="serverName=laravel-prometheus-exporter.localhost" \
+    --net=host --sig-proxy=true --pid=host \
+    --entrypoint="php" \
+     laravel-prometheus-exporter:"${PHP_VERSION}" "${@}"
+

changelog.md

@@ -1,9 +1,32 @@
 # Changelog
+All notable changes to this project will be documented in this file.
 
-## 1.0.1 - 2017-08-30
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-* Fix config retrieval of `prometheus.storage_adapters`
+## [2.0.0] - 2020-02-12
+### Added
+ - Add PHP 7.2 support.
+ - Add PHP 8 support.
+ - Add pipeline for running automated tests.
+ - Add makefile and docker images for development purposes.
+ - Add support for Guzzle 7.
+ - Add default metric `php_version`.
 
-## 1.0.0 - 2017-07-27
+### Changed
+ - Replace `endclothing/prometheus_client_php` dependency with `promphp/prometheus_client_php` .
+ - Move collectors instantiation from the boot method to the callable that creates
+the prometheus exporter. This means that the collectors are instantiated only when the
+exporter is required, preventing the need of a redis connection when just executing
+`php artisan`, for example.
 
-* Initial release
+### Removed
+ - Drop Laravel 5.x support.
+
+## [1.0.1] - 2017-08-30
+### Changed
+ - Fix config retrieval of `prometheus.storage_adapters`
+
+## [1.0.0] - 2017-07-27
+### Added
+ - Initial release