Magnus Holm - It's a Gash, Gash, Gash

sudo gem install gash

Gash lets you access a Git-repo as a Hash.
Gash doesn’t touch your working directory
Gash only cares about the data, not the commits.
Gash only cares about the latest data.
Gash can commit.
Gash will automatically create branches if they don’t exist.
Gash only loads what it needs, so it handles large repos well.
Gash got pretty good documentation.
Gash got a bug tracker.
Gash is being developed at GitHub.

Let me show you what I mean…

require 'gash'
wiki = Gash.new("~/programming/sources/gash/.git", "wiki")

# See, it doesn't exists yet!
wiki.branch_exists? # => false

# Lets add some files...
wiki["Start"] = "Welcome to this great [[Wiki]]!"
wiki["Wiki"] = "Something everyone can edit."

# And commit them.
wiki.commit("First verision")

# Now it exists!
wiki.branch_exists? # => true

# We can use all the regular Hash-methods too:
wiki.merge!("Start" => "Se our new section: [[Git]]",
            "Git/About" => "An awesome SCM.")

wiki["GitSCM"] = wiki.delete("Git")

wiki.commit("Adding a Git-section")

# And some special methods:
wiki["Git"].tree?                         # => true
wiki["Git/About"] == wiki["Git"]["About"] # => true
wiki["Git/About"].blob?                   # => true
wiki["Git/About"].sha1                    # => "123456789"
wiki["Git/About"].mode                    # => "100644"