130 lines
3.6 KiB
Ruby
Executable file
130 lines
3.6 KiB
Ruby
Executable file
#!/usr/bin/env ruby
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# frozen_string_literal: true
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require 'digest'
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require 'fileutils'
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if ENV['NO_COLOR']
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SHELL_RED = ''
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SHELL_GREEN = ''
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SHELL_YELLOW = ''
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SHELL_CLEAR = ''
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else
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SHELL_RED = "\e[1;31m"
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SHELL_GREEN = "\e[1;32m"
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SHELL_YELLOW = "\e[1;33m"
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SHELL_CLEAR = "\e[0m"
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end
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LEFTHOOK_GLOBAL_CONFIG_PATH = File.expand_path("../lefthook.yml", __dir__)
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HOOK_PATH = `git rev-parse --path-format=absolute --git-path hooks/pre-push`.split.last
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HOOK_DATA = <<~HOOK
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#!/usr/bin/env bash
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set -e
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url="$2"
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if [[ "$url" != *"gitlab-org/security/"* ]]
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then
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echo "Pushing to remotes other than gitlab.com/gitlab-org/security has been disabled!"
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echo "Run scripts/security-harness to disable this check."
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echo
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exit 1
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fi
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HOOK
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def hook_exist?
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File.exist?(HOOK_PATH)
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end
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def lefthook_hook_in_place?
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hook_exist? && File.foreach(HOOK_PATH).grep(/lefthook/i).any?
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end
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def lefthook_available?
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system('bundle exec lefthook run prepare-commit-msg &>/dev/null') # rubocop:disable GitlabSecurity/SystemCommandInjection
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end
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def uninstall_lefthook
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return unless lefthook_available?
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system('bundle exec lefthook uninstall') # rubocop:disable GitlabSecurity/SystemCommandInjection
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# `bundle exec lefthook uninstall` removes the `lefthook.yml` file so we checkout it again
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system("git checkout -- #{LEFTHOOK_GLOBAL_CONFIG_PATH}") # rubocop:disable GitlabSecurity/SystemCommandInjection
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puts "#{SHELL_YELLOW}Lefthook was uninstalled to let the security harness work properly.#{SHELL_CLEAR}"
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end
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def install_lefthook
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return unless lefthook_available?
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system('bundle exec lefthook install') # rubocop:disable GitlabSecurity/SystemCommandInjection
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puts "#{SHELL_GREEN}Lefthook was re-installed.#{SHELL_CLEAR}"
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end
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def write_hook
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FileUtils.mkdir_p(File.dirname(HOOK_PATH))
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File.open(HOOK_PATH, 'w') do |file|
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file.write(HOOK_DATA)
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end
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File.chmod(0755, HOOK_PATH)
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puts "#{SHELL_GREEN}Security harness installed -- you will only be able to push to gitlab.com/gitlab-org/security!#{SHELL_CLEAR}"
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end
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def delete_hook
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FileUtils.rm(HOOK_PATH)
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system("git checkout master")
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puts "#{SHELL_YELLOW}Security harness removed -- you can now push to all remotes.#{SHELL_CLEAR}"
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end
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def hook_file_sum
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Digest::SHA256.file(HOOK_PATH).hexdigest
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end
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def hook_data_sum
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Digest::SHA256.hexdigest(HOOK_DATA)
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end
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# If we were to change the script and then check for a pre-existing hook before
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# writing, the check would fail even if the user had an unmodified version of
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# the old hook. Checking previous version hashes allows us to safely overwrite a
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# script that differs from the current version, as long as it's an old one and
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# not custom.
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def upgrade_available?
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# SHA256 hashes of previous iterations of the script contained in `HOOK_DATA`
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%w[
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010bf0363a911ebab2bd5728d80795ed02388da51815f0b2530d08ae8ac574f0
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d9866fc672f373d631eed9cd8dc9c920fa3d36ff26d956fb96a4082a0931b371
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].include?(hook_file_sum)
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end
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def current_version?
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hook_data_sum == hook_file_sum
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end
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# Uninstall Lefthook if it's in place
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uninstall_lefthook if lefthook_hook_in_place?
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if hook_exist?
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# Deal with a pre-existing hook
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if upgrade_available?
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# Upgrading from a previous version, update in-place
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write_hook
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elsif current_version?
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# Delete the hook if we're already using the current version
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delete_hook
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# Re-install Lefthook pre-push hook
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install_lefthook
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else
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# Pre-existing hook we didn't create; do nothing
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puts "#{SHELL_RED}#{HOOK_PATH} exists and is different from our hook!"
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puts "Remove it and re-run this script to continue.#{SHELL_CLEAR}"
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exit 1
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end
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else
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write_hook
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end
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