TextMate 2 syntax highlighting for GitHub Fenced Code blocks in Markdown. Extends the standard Markdown bundle.

GitHub Fenced Code Blocks.tmLanguage

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<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>fileTypes</key>
	<array>
		<string>md</string>
	</array>
	<key>injectionSelector</key>
	<string>(L:text.html.markdown)</string>
	<key>name</key>
	<string>GitHub Fenced Code Blocks</string>
	<key>patterns</key>
	<array>
		<dict>
			<key>begin</key>
			<string>```xml\n</string>
			<key>end</key>
			<string>```\n</string>
			<key>name</key>
			<string>markup.raw.block.markdown</string>
			<key>patterns</key>
			<array>
				<dict>
					<key>include</key>
					<string>text.xml</string>
				</dict>
			</array>
		</dict>
		<dict>
			<key>begin</key>
			<string>```java\n</string>
			<key>end</key>
			<string>```\n</string>
			<key>name</key>
			<string>markup.raw.block.markdown</string>
			<key>patterns</key>
			<array>
				<dict>
					<key>include</key>
					<string>source.java</string>
				</dict>
			</array>
		</dict>
		<dict>
			<key>begin</key>
			<string>```javascript\n</string>
			<key>end</key>
			<string>```\n</string>
			<key>name</key>
			<string>markup.raw.block.markdown</string>
			<key>patterns</key>
			<array>
				<dict>
					<key>include</key>
					<string>source.js</string>
				</dict>
			</array>
		</dict>
		<dict>
			<key>begin</key>
			<string>```json\n</string>
			<key>end</key>
			<string>```\n</string>
			<key>name</key>
			<string>markup.raw.block.markdown</string>
			<key>patterns</key>
			<array>
				<dict>
					<key>include</key>
					<string>source.json</string>
				</dict>
			</array>
		</dict>
		<dict>
			<key>begin</key>
			<string>```\w+\n</string>
			<key>end</key>
			<string>```\n</string>
			<key>name</key>
			<string>markup.raw.block.markdown</string>
		</dict>
	</array>
	<key>scope</key>
	<string>(L:text.html)</string>
	<key>scopeName</key>
	<string>injection.markdown.highlight</string>
	<key>uuid</key>
	<string>06EF4EE0-F5CB-4D19-84F2-084E88941794</string>
</dict>
</plist>