discourse/lib/theme_store/git_importer.rb

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module ThemeStore; end
class ThemeStore::GitImporter
class ImportFailed < StandardError; end
attr_reader :url
def initialize(url, private_key: nil, branch: nil)
@url = url
if @url.start_with?("https://github.com") && !@url.end_with?(".git")
@url += ".git"
end
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@temp_folder = "#{Pathname.new(Dir.tmpdir).realpath}/discourse_theme_#{SecureRandom.hex}"
@private_key = private_key
@branch = branch
end
def import!
if @private_key
import_private!
else
import_public!
end
end
def commits_since(hash)
commit_hash, commits_behind = nil
Dir.chdir(@temp_folder) do
commit_hash = Discourse::Utils.execute_command("git", "rev-parse", "HEAD").strip
commits_behind = Discourse::Utils.execute_command("git", "rev-list", "#{hash}..HEAD", "--count").strip
end
[commit_hash, commits_behind]
end
def version
Dir.chdir(@temp_folder) do
Discourse::Utils.execute_command("git", "rev-parse", "HEAD").strip
end
end
def cleanup!
FileUtils.rm_rf(@temp_folder)
end
def real_path(relative)
fullpath = "#{@temp_folder}/#{relative}"
return nil unless File.exist?(fullpath)
# careful to handle symlinks here, don't want to expose random data
fullpath = Pathname.new(fullpath).realpath.to_s
if fullpath && fullpath.start_with?(@temp_folder)
fullpath
else
nil
end
end
def [](value)
fullpath = real_path(value)
return nil unless fullpath
File.read(fullpath)
end
protected
def import_public!
begin
if @branch.present?
Discourse::Utils.execute_command("git", "clone", "--single-branch", "-b", @branch, @url, @temp_folder)
else
Discourse::Utils.execute_command("git", "clone", @url, @temp_folder)
end
rescue => err
raise ImportFailed.new(err.message)
end
end
def import_private!
ssh_folder = "#{Pathname.new(Dir.tmpdir).realpath}/discourse_theme_ssh_#{SecureRandom.hex}"
FileUtils.mkdir_p ssh_folder
Dir.chdir(ssh_folder) do
File.write('id_rsa', @private_key.strip)
FileUtils.chmod(0600, 'id_rsa')
end
begin
git_ssh_command = { 'GIT_SSH_COMMAND' => "ssh -i #{ssh_folder}/id_rsa -o StrictHostKeyChecking=no" }
if @branch.present?
Discourse::Utils.execute_command(git_ssh_command, "git", "clone", "--single-branch", "-b", @branch, @url, @temp_folder)
else
Discourse::Utils.execute_command(git_ssh_command, "git", "clone", @url, @temp_folder)
end
rescue => err
raise ImportFailed.new(err.message)
end
ensure
FileUtils.rm_rf ssh_folder
end
end