2016-09-08 09:11:44 +00:00
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# encoding: utf-8
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require 'tmpdir'
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require 'fileutils'
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require 'mixlib/shellout'
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require 'inspec/log'
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module Fetchers
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#
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# The git fetcher uses the git binary to fetch remote git sources.
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# Git-based sources should be specified with the `git:` key in the
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# source hash. Additionally, we accept `:branch`, `:ref`, and `:tag`
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# keys to allow users to pin to a particular revision.
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#
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# Parts of this class are derived from:
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#
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# https://github.com/chef/omnibus/blob/master/lib/omnibus/fetchers/git_fetcher.rb
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#
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# which is Copyright 2012-2014 Chef Software, Inc. and offered under
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# the same Apache 2 software license as inspec.
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#
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# Many thanks to the omnibus authors!
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#
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# Note that we haven't replicated all of omnibus' features here. If
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# you got to this file during debugging, you may want to look at the
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# omnibus source for hints.
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#
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class Git < Inspec.fetcher(1)
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name 'git'
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priority 200
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def self.resolve(target, opts = {})
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if target.respond_to?(:has_key?) &&target.key?(:git)
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new(target[:git], opts.merge(target))
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end
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end
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def initialize(remote_url, opts = {})
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@branch = opts[:branch]
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@tag = opts[:tag]
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@ref = opts[:ref]
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@remote_url = remote_url
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@repo_directory = nil
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end
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def fetch(dir)
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@repo_directory = dir
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if cloned?
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checkout
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else
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Dir.mktmpdir do |tmpdir|
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checkout(tmpdir)
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Inspec::Log.debug("Checkout of #{resolved_ref} successful. Moving checkout to #{dir}")
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FileUtils.cp_r(tmpdir, @repo_directory)
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end
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end
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@repo_directory
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end
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2016-09-20 10:36:23 +00:00
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def cache_key
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resolved_ref
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end
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2016-09-08 09:11:44 +00:00
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def archive_path
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@repo_directory
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end
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def resolved_source
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{ git: @remote_url, ref: resolved_ref }
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end
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private
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def resolved_ref
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@resolved_ref ||= if @ref
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@ref
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elsif @branch
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resolve_ref(@branch)
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elsif @tag
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resolve_ref(@tag)
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else
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resolve_ref('master')
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end
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end
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def resolve_ref(ref_name)
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cmd = shellout("git ls-remote \"#{@remote_url}\" \"#{ref_name}*\"")
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ref = parse_ls_remote(cmd.stdout, ref_name)
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if !ref
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2017-02-08 22:49:16 +00:00
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raise "Unable to resolve #{ref_name} to a specific git commit for #{@remote_url}"
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2016-09-08 09:11:44 +00:00
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end
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ref
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end
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#
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# The following comment is a minor modification of the comment in
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# the omnibus source for a similar function:
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#
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# Dereference annotated tags.
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#
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# The +remote_list+ parameter is assumed to look like this:
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#
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# a2ed66c01f42514bcab77fd628149eccb4ecee28 refs/tags/rel-0.11.0
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# f915286abdbc1907878376cce9222ac0b08b12b8 refs/tags/rel-0.11.0^{}
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#
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# The SHA with ^{} is the commit pointed to by an annotated
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# tag. If ref isn't an annotated tag, there will not be a line
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# with trailing ^{}.
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#
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# @param [String] output
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# output from `git ls-remote origin` command
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# @param [String] ref_name
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# the target git ref_name
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#
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# @return [String]
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#
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def parse_ls_remote(output, ref_name)
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pairs = output.lines.map { |l| l.chomp.split("\t") }
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tagged_commit = pairs.find { |m| m[1].end_with?("#{ref_name}^{}") }
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if tagged_commit
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tagged_commit.first
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else
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found = pairs.find { |m| m[1].end_with?(ref_name.to_s) }
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if found
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found.first
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end
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end
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end
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def cloned?
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File.directory?(File.join(@repo_directory, '.git'))
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end
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def clone(dir = @repo_directory)
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git_cmd("clone #{@remote_url} ./", dir) unless cloned?
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@repo_directory
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end
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def checkout(dir = @repo_directory)
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clone(dir)
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git_cmd("checkout #{resolved_ref}", dir)
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@repo_directory
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end
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def git_cmd(cmd, dir = @repo_directory)
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cmd = shellout("git #{cmd}", cwd: dir)
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cmd.error!
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cmd.status
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rescue Errno::ENOENT
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raise 'To use git sources, you must have git installed.'
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end
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def shellout(cmd, opts = {})
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Inspec::Log.debug("Running external command: #{cmd} (#{opts})")
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cmd = Mixlib::ShellOut.new(cmd, opts)
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cmd.run_command
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Inspec::Log.debug("External command: completed with exit status: #{cmd.exitstatus}")
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Inspec::Log.debug('External command: STDOUT BEGIN')
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Inspec::Log.debug(cmd.stdout)
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Inspec::Log.debug('External command: STDOUT END')
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Inspec::Log.debug('External command: STDERR BEGIN')
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Inspec::Log.debug(cmd.stderr)
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Inspec::Log.debug('External command: STDERR END')
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cmd
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end
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end
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end
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