何もない状態からComposer( http://getcomposer.org/ )でAWS SDK( http://aws.amazon.com/jp/sdkforphp/ )を入れて動かそうとしたら変なところで詰まってしまったので、備忘録として。

環境

Ubuntu 14.04.1 LTS
x86_64
PHP回りは何も入ってない状態

流れ

PHPを入れる

$ sudo apt-get install php5-cli

cliのみの最低限で。

Composerを入れる

$ curl -sS https://getcomposer.org/installer | php
$ sudo mv composer.phar /usr/local/bin/composer

どこでも使えるように、/usr/local/bin/下に移動。

$ composer --version
Composer version 1.0-dev (b23a3cd36870ff0eefc161a4638d9fcf49d998ba) 2014-11-21 17:59:11

動いた。

AWS SDKのサンプルを拾ってくる

$ git clone https://github.com/awslabs/aws-php-sample.git

cloneするだけ。

いざcomposer install

$ composer installLoading composer repositories with package information
Installing dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
(略)
    - aws/aws-sdk-php 2.6.16 requires guzzle/guzzle >=3.7.0,<=3.9.9 -> satisfiable by guzzle/guzzle[v3.7.0, v3.7.1, v3.7.2, v3.7.3, v3.7.4, v3.8.0, v3.8.1, v3.9.0, v3.9.1, v3.9.2].
(略)

依存関係が解決できないようだけど、勝手に入れてくれたような・・・？

composer.jsonに追記してみる

{
    "require": {
        "guzzle/guzzle": "3.9.*",
        "aws/aws-sdk-php": "2.6.*"
    }
}

Guzzleの依存関係が解決できてないっぽいので、追記して再度composer intallしてみると・・・

$ composer install
Loading composer repositories with package information
Installing dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - guzzle/guzzle v3.9.2 requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - guzzle/guzzle v3.9.1 requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - guzzle/guzzle v3.9.0 requires ext-curl * -> the requested PHP extension curl is missing from your system.
    - Installation request for guzzle/guzzle 3.9.* -> satisfiable by guzzle/guzzle[v3.9.0, v3.9.1, v3.9.2].

curlの拡張を入れないといけなかったらしい。

curlの拡張を入れる

$ sudo apt-get install php5-curl
$ composer install
Loading composer repositories with package information
Installing dependencies (including require-dev)
  - Installing symfony/event-dispatcher (v2.6.0)
    Downloading: 100%         

  - Installing guzzle/guzzle (v3.9.2)
    Downloading: 100%         

  - Installing aws/aws-sdk-php (2.6.16)
    Downloading: 100%         

symfony/event-dispatcher suggests installing symfony/dependency-injection ()
symfony/event-dispatcher suggests installing symfony/http-kernel ()
aws/aws-sdk-php suggests installing doctrine/cache (Adds support for caching of credentials and responses)
aws/aws-sdk-php suggests installing ext-apc (Allows service description opcode caching, request and response caching, and credentials caching)
aws/aws-sdk-php suggests installing monolog/monolog (Adds support for logging HTTP requests and responses)
aws/aws-sdk-php suggests installing symfony/yaml (Eases the ability to write manifests for creating jobs in AWS Import/Export)
Writing lock file
Generating autoload files

めでたしめでたし。

よく見たら

ここに、

PHP 5.3.3+ compiled with the cURL extension

と書いてありました。ドキュメントをよく読みましょう・・・。