library/roles/composer: Role that installs composer, a php plugins manager.

composer/defaults/main.yml

@@ -0,0 +1,11 @@
+---
+# See https://getcomposer.org/download
+#
+composer_install: True
+composer_get_url: https://getcomposer.org/installer
+composer_dest_dir: /usr/local/bin
+composer_exec_name: composer
+composer_signature_type: SHA384
+composer_signature: 'e115a8dc7871f15d853148a7fbac7da27d6c0030b848d9b3dc09e2a0388afed865e6a3d6b3c0fad45c48e2b5fc1196ae'
+composer_setup: composer-setup.php
+

composer/tasks/main.yml

@@ -0,0 +1,23 @@
+---
+- block:
+    - name: Install the script that downloads and installs composer
+      template: src=composer-installer.j2 dest=/usr/local/sbin/composer-installer owner=root group=root mode=0750
+      
+    - name: Install composer
+      shell: /usr/local/sbin/composer-installer
+      args:
+        creates: '{{ composer_dest_dir }}/{{ composer_exec_name }}'
+
+  when: composer_install
+  tags: [ 'php', 'composer' ]
+
+- block:
+    - name: Remove the composer installer script
+      file: dest=/usr/local/sbin/composer-installer state=absent
+      
+    - name: Remove composer
+      file: dest='{{ composer_dest_dir }}/{{ composer_exec_name }}' state=absent
+
+  when: not composer_install
+  tags: [ 'php', 'composer' ]
+

composer/templates/composer-installer.j2

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+php -r "copy('{{ composer_get_url }}', '{{ composer_setup }}');" 
+php -r "if (hash_file('{{ composer_signature_type }}', '{{ composer_setup }}') === '{{ composer_signature }}') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('{{ composer_setup }}'); } echo PHP_EOL;"
+php {{ composer_setup }} --install-dir={{ composer_dest_dir }} --filename={{ composer_exec_name }}
+php -r "unlink('{{ composer_setup }}');"
+
+chmod 755 {{ composer_dest_dir }}/{{ composer_exec_name }}
+
+exit 0