Ability to use forgit commands as sub-commands of git (e.g. `git forgit log`)

[wren]

Check list

• [x] I have performed a self-review of my code
• [x] I have commented my code in hard-to-understand areas
• [x] I have made corresponding changes to the documentation

Description

Fixes #147

This works by adding a file (bin/git-forgit) that acts as a bridge between forgit and git. The file takes any command, changes underscores to double colons (_ → ::), and forwards all arguments to the associated function in forgit.plugin.zsh. For example, git forgit log becomes forgit::log, and git forgit checkout_file README.md becomes forgit::checkout::file README.md.

This file should be future-proof as long as the current naming scheme continues, so it won't need to be updated every time a new command is added.

Also, this relies on the user setting an environment variable named FORGIT_STANDALONE. All new code in forgit is hidden behind this new flag, so no current users will see any change in behavior or performance when updating forgit.

Type of change

• [ ] Bug fix
• [x] New feature
• [ ] Refactor
• [ ] Breaking change
• [ ] Documentation change

Test environment

• Shell
  • [x] bash
  • [x] zsh
  • [x] fish
• OS
  • [x] Linux
  • [x] Mac OS X
  • [ ] Windows
  • [ ] Others:

[wfxr]

@wren Merged. Thanks again for your contirbution !

[wfxr]

@wren Can you help take a look at #210 ?

[wren]

@wren Can you help take a look at #210 ?

Yeah, I think I have some time at the end of this week to take a look.