Merge pull request #2 from nubs/switch-to-alpine

Switch from Arch Linux to Alpine Linux for smaller images.

Author: nubs

Dockerfile

@@ -1,33 +1,19 @@
-FROM base/archlinux:latest
+FROM php:7.0-alpine
 
 MAINTAINER Spencer Rinehart <[email protected]>
 
-RUN curl -o /etc/pacman.d/mirrorlist "https://www.archlinux.org/mirrorlist/?country=all&protocol=https&ip_version=6&use_mirror_status=on" && sed -i 's/^#//' /etc/pacman.d/mirrorlist
-
-# Update system and install php + composer dependencies (git and openssh for
-# access to repositories)
-RUN pacman-key --refresh-keys && \
-    pacman --sync --refresh --noconfirm --noprogressbar --quiet && \
-    pacman --sync --noconfirm --noprogressbar --quiet archlinux-keyring openssl pacman && \
-    pacman-db-upgrade && \
-    pacman --sync --sysupgrade --noconfirm --noprogressbar --quiet && \
-    pacman --sync --noconfirm --noprogressbar --quiet php git openssh
-
-# Configure the base system.  Timezone is there to silence php's silly
-# warnings.
-COPY timezone.ini /etc/php/conf.d/
+RUN apk add --no-cache --virtual .php-composer-deps git openssh
 
 RUN mkdir /code
 WORKDIR /code
 
-ENV HOME /root
 ENV COMPOSER_HOME $HOME/.composer
 
 # Setup and install composer into the composer global location.  The
 # certificate is installed manually to get around open_basedir restrictions.
 RUN mkdir -p $COMPOSER_HOME/vendor/bin
-RUN curl -sSLo $COMPOSER_HOME/cacert.pem http://curl.haxx.se/ca/cacert.pem
-RUN curl -sSL https://getcomposer.org/installer | php -- --install-dir=$COMPOSER_HOME/vendor/bin --filename=composer --cafile=$COMPOSER_HOME/cacert.pem
+RUN curl -sSL https://getcomposer.org/installer | \
+    php -- --install-dir=$COMPOSER_HOME/vendor/bin --filename=composer
 
 # Setup PATH to prioritize local composer bin and global composer bin ahead of
 # system PATH.

README.md

@@ -2,17 +2,14 @@
 This is a base image for building [PHP][PHP] [composer] packages.
 
 ## Purpose
-This docker image builds on top of Arch Linux's base/archlinux image for the
+This docker image builds on top of the official PHP 7.0-alpine image with the
 purpose of building PHP composer packages.  It provides several key features:
 
 * Access to the build location will be in the volume located at `/code`.  This
   directory will be the default working directory.
 * Composer bin directories are automatically included in `PATH`.  Both a
   relative `vendor/bin` directory, and the global `$COMPOSER_HOME/vendor/bin`
   directory are included in the `PATH`.
-* Timezone set to `UTC` by default to remove the warnings with PHP's date and
-  time functions.  This can be overridden by updating
-  `/etc/php/conf.d/timezone.ini`.
 
 ## Usage
 This library is useful with simple `composer.json`'s from the command line.
@@ -73,7 +70,8 @@ process alone could look like this:
 ```dockerfile
 FROM nubs/composer-build
 
-RUN pacman --sync --noconfirm --noprogressbar --quiet xdebug
+RUN apk add --no-cache xdebug && \
+    docker-php-ext-enable xdebug
 ```
 
 You can then build this docker image and run it against your `composer.json`