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module SDoc::GitHub
def github_url(path)
return false unless have_git?
unless @github_url_cache.has_key? path
@github_url_cache[path] = false
file = @store.find_file_named(path)
if file
base_url = repository_url(path)
if base_url
relative_url = path_relative_to_repository(path)
@github_url_cache[path] = "#{base_url}#{last_commit_sha1}#{relative_url}"
end
end
end
@github_url_cache[path]
end
protected
def have_git?
@have_git = system('git --version > /dev/null 2>&1') if @have_git.nil?
@have_git
end
def last_commit_sha1
return @sha1 if defined?(@sha1)
@sha1 = Dir.chdir(base_dir) do
`git rev-parse HEAD`.chomp
end
end
def repository_url(path)
return @repository_url if defined?(@repository_url)
s = Dir.chdir(File.join(base_dir, File.dirname(path))) do
`git config --get remote.origin.url`
end
m = s.match(%r{github.com[/:](.*)\.git$})
@repository_url = m ? "https://github.com/#{m[1]}/blob/" : false
end
def path_relative_to_repository(path)
absolute_path = File.join(base_dir, path)
root = path_to_git_dir(File.dirname(absolute_path))
absolute_path[root.size..absolute_path.size]
end
def path_to_git_dir(path)
while !path.empty? && path != '.'
if (File.exists? File.join(path, '.git'))
return path
end
path = File.dirname(path)
end
''
end
end
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