Githug
About
Githug is designed to give you a practical way of learning git. It has a series of levels, each utilizing git commands to ensure a correct answer.
Installation
To install Githug
gem install githug
After the gem is installed, you can run githug
where you will be prompted to create a directory. Githug should work on Linux and OS X.
Commands
Githug has 4 commands:
- play - This is the default command and it will check your solution for the current level.
- hint - Gives you a hint (if available) for the current level
- reset - Reset the current level
- test - Used to test levels in development, please see the Testing Levels section.
Change Log
The change log is available on the wiki. Change log
Contributing
If you want to suggest a level or make a level that has been suggested, check out the wiki.
Get yourself on the contributors list by doing the following:
- Fork the repository
- Make a level in the levels directory (covered below)
- Add your level to the LEVELS array inside
lib/githug/level.rb
in a position that makes sense (the "commit" level after the "add" and "init" levels for example) - Make sure your level works (covered below)
- Submit a pull request
Todo List
- A better way of returning from the solution block
- A follow up to the level, more information on a specific command, etc.
- More levels!
Writing Levels
Githug has a DSL for writing levels
An example level:
difficulty 1
description "There is a file in your folder called README, you should add it to your staging area"
setup do
repo.init
FileUtils.touch("README")
end
solution do
return false unless repo.status.files.keys.include?("README")
return false if repo.status.files["README"].untracked
true
end
hint do
puts "You can type `git` in your shell to get a list of available git commands"
end
difficulty
, description
and solution
are required.
You can also include multiple hints like this:
hints [
"You can type `git` in your shell to get a list of available git commands",
"Check the man for `git add`"]
note Because solution
is a Proc, you cannot prematurely return out of it and as a result, must put an implicit return on the last line of the solution block.
solution do
solved = false
solved = true if repo.valid?
solved
end
By default, setup
will remove all files from the game folder. You do not need to include a setup method if you don't want an initial git repository (if you are testing git init
or only checking an answer.)
You can call repo.init
to initialize an empty repository.
All methods called on repo
are sent to the grit gem if the method does not exist, and you can use that for most git related commands (repo.add
, repo.commit
, etc.)
Another method exists called init_from_level
and it is used like so:
setup do
init_from_level
end
This will copy the contents of a repository specified in the levels folder for your level. For example, if your level is called "merge" then it will copy the contents of the "merge" folder. it is recommended that you do the following steps:
- mkdir "yourlevel"
- cd "yourlevel"
- git init
- some git stuff
- important rename ".git" to ".githug" so it does not get treated as a submodule
- cd "../"
- git add "yourlevel"
After doing this, your level should be able to copy the contents from that git repository and use those for your level. You can see the "blame" level for an example of this.
Testing Levels
The easiest way to test a level is:
- change into your git_hug repository
- Run `githug reset PATH_TO_YOUR_LEVEL
- Solve the level
- Run `githug test PATH_TO_YOUR_LEVEL
Please note that the githug test
command can be run as githug test --errors
to get an error stacktrace from your solve method.