composer.json

{
    "repositories": [
        {
            "type": "package",
            "package": {
                "name": "google/code-prettify",
				"version": "1.0-dev",
                "source": {
                    "url": "http://google-code-prettify.googlecode.com/svn/",
                    "type": "svn",
                    "reference": "trunk"
                }
            }
        }
    ],
    "require": {
        "google/code-prettify":"*"
    }
}

composer_svn

php composer.phar install
Installing dependencies
  - Package google/code-prettify (1.0-dev)
    Checking out trunk
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/yui-compressor
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/yui-compressor/LICENSE.TXT
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/yui-compressor/yuicompressor-2.4.4.jar
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/yui-compressor/README
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/README.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/regexpPrecederPatterns.pl
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/prettify.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/extractSourceSpans_test.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/recombineTagsAndDecorations_test.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/externs.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/numberLines_test.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/combinePrefixPatterns.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/recombineTagsAndDecorations.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/extractSourceSpans.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/js-modules/numberLines.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/tests
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/tests/ie-newline-copy-paste.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/tests/test_base.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/tests/prettify_test.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/tests/prettify_test_2.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/tests/test_styles.css
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/tests/large_input_test.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/styles
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/styles/sons-of-obsidian.css
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/styles/demo.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/styles/index.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/styles/sunburst.css
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/styles/desert.css
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/closure-compiler
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/closure-compiler/console-externs.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/closure-compiler/compiler.jar
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/closure-compiler/COPYING
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/closure-compiler/README
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/README-zh-Hans.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-apollo.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/prettify.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-css.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-xq.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-vhdl.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-n.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-sql.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-tex.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-yaml.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-wiki.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-proto.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/prettify.css
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-go.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-lisp.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-vb.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-ml.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-clj.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-hs.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-lua.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/src/lang-scala.js
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/COPYING
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/CHANGES.html
A    /Users/stealth35/Documents/test/vendor/google/code-prettify/Makefile
 U   /Users/stealth35/Documents/test/vendor/google/code-prettify
Checked out revision 194.

Writing lock file
Generating autoload files

composer_svn_quite

// php composer.phar install
Installing dependencies
  - Package google/code-prettify (1.0-dev)
    Checking out trunk

Writing lock file
Generating autoload files