Support for command aliases

[jigarius]

Requirements

Allow Phpake callbacks to declare command aliases using a @alias annotation. For example,

# Phpakefile

namespace Input_Output;

/**
 * Say hello world.
 *
 * @alias hhum
 * @alias helo
 */
function hello_human() {
  echo 'Hello human' . PHP_EOL;
}

At the end of all the changes, running phpake input-output:hello-human --help should show the command alias(es) correctly. Running phpake helo should work the same way as phpake input-output::hello-human.

[jigarius]

Hi Pankaj. This is a good task to start with.

Next steps

• Understand what Phpake is (read documentation).
• Read about Symfony Console - what it is and what it does
• Use the instructions in the README to setup a local dev env
• Check how the @usage annotation is being handled by Phpake
  • See class \Phpake\Task
  • See class \Phpake\Commands\ExecCommand
• Add 2 aliases to the callback hello_human(). I'm not sure if multiple aliases are allowed, so check this in the Symfony Console documentation.
  • hhum
  • helo
• Modify the code to detect those @alias tags
• Update the tests

Let me know if you have any questions and feel free to document things that you think are relevant.