99 lines
2.5 KiB
Ruby
Executable file
99 lines
2.5 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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HOOK_PATH = File.expand_path("../.git/hooks/pre-push", __dir__)
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HOOK_DATA = <<~HOOK
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#!/bin/bash
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set -e
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url="$2"
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harness=`dirname "$0"`/../security_harness
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if [ -e "$harness" ]
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then
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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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fi
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HOOK
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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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end
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# Toggle the harness on or off
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def toggle
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harness_path = File.expand_path('../.git/security_harness', __dir__)
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if File.exist?(harness_path)
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FileUtils.rm(harness_path)
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puts "#{SHELL_YELLOW}Security harness removed -- you can now push to all remotes.#{SHELL_CLEAR}"
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else
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FileUtils.touch(harness_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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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 previous_version?(dest_sum)
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# SHA256 hashes of previous iterations of the script contained in `DATA`
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%w[
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010bf0363a911ebab2bd5728d80795ed02388da51815f0b2530d08ae8ac574f0
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].include?(dest_sum)
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end
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if !File.exist?(HOOK_PATH)
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write_hook
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toggle
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else
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# Deal with a pre-existing hook
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source_sum = Digest::SHA256.hexdigest(HOOK_DATA)
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dest_sum = Digest::SHA256.file(HOOK_PATH).hexdigest
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if previous_version?(dest_sum)
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# Upgrading from a previous version, update in-place
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write_hook
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toggle
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elsif source_sum != dest_sum
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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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else
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# No hook update needed, just toggle
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toggle
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end
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end
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