Class: Chef::Provider::Git

Inherits:
Chef::Provider show all
Includes:
Mixin::ShellOut
Defined in:
lib/chef/provider/git.rb

Constant Summary

Constants included from Mixin::ShellOut

Mixin::ShellOut::DEPRECATED_OPTIONS

Instance Attribute Summary

Attributes inherited from Chef::Provider

#action, #cookbook_name, #current_resource, #new_resource, #recipe_name, #run_context

Instance Method Summary collapse

Methods included from Mixin::ShellOut

#run_command_compatible_options, #shell_out, #shell_out!

Methods inherited from Chef::Provider

#action_nothing, #cleanup_after_converge, #converge_by, #events, #initialize, #node, #process_resource_requirements, #requirements, #resource_collection, #resource_updated?, #run_action, #set_updated_status, #whyrun_mode?

Methods included from DSL::Recipe

#build_resource, #declare_resource, #describe_self_for_error, #evaluate_resource_definition, #has_resource_definition?, #have_resource_class_for?, #method_missing, #resource_class_for

Methods included from Mixin::ConvertToClassName

#convert_to_class_name, #convert_to_snake_case, #filename_to_qualified_string, #snake_case_basename

Constructor Details

This class inherits a constructor from Chef::Provider

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Chef::DSL::Recipe

Instance Method Details

#action_checkout ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 76

def action_checkout
  if target_dir_non_existent_or_empty?
    clone
    if @new_resource.enable_checkout
      checkout
    end
    enable_submodules
    add_remotes
  else
    Chef::Log.debug "#{@new_resource} checkout destination #{@new_resource.destination} already exists or is a non-empty directory"
  end
end

#action_export ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 89

def action_export
  action_checkout
  converge_by("complete the export by removing #{@new_resource.destination}.git after checkout") do
    FileUtils.rm_rf(::File.join(@new_resource.destination,".git"))
  end
end

#action_sync ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 96

def action_sync
  if existing_git_clone?
    current_rev = find_current_revision
    Chef::Log.debug "#{@new_resource} current revision: #{current_rev} target revision: #{target_revision}"
    unless current_revision_matches_target_revision?
      fetch_updates
      enable_submodules
      Chef::Log.info "#{@new_resource} updated to revision #{target_revision}"
    end
    add_remotes
  else
    action_checkout
  end
end

#add_remotes ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 129

def add_remotes
  if (@new_resource.additional_remotes.length > 0)
    @new_resource.additional_remotes.each_pair do |remote_name, remote_url|
      converge_by("add remote #{remote_name} from #{remote_url}") do
        Chef::Log.info "#{@new_resource} adding git remote #{remote_name} = #{remote_url}"
        setup_remote_tracking_branches(remote_name, remote_url)
      end
    end
  end
end

#checkout ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 155

def checkout
  sha_ref = target_revision

  converge_by("checkout ref #{sha_ref} branch #{@new_resource.revision}") do
    # checkout into a local branch rather than a detached HEAD
    shell_out!("git checkout -b #{@new_resource.checkout_branch} #{sha_ref}", run_options(:cwd => @new_resource.destination))
    Chef::Log.info "#{@new_resource} checked out branch: #{@new_resource.revision} onto: #{@new_resource.checkout_branch} reference: #{sha_ref}"
  end
end

#clone ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 140

def clone
  converge_by("clone from #{@new_resource.repository} into #{@new_resource.destination}") do
    remote = @new_resource.remote

    args = []
    args << "-o #{remote}" unless remote == 'origin'
    args << "--depth #{@new_resource.depth}" if @new_resource.depth

    Chef::Log.info "#{@new_resource} cloning repo #{@new_resource.repository} to #{@new_resource.destination}"

    clone_cmd = "git clone #{args.join(' ')} \"#{@new_resource.repository}\" \"#{@new_resource.destination}\""
    shell_out!(clone_cmd, run_options)
  end
end

#current_revision_matches_target_revision? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 221

def current_revision_matches_target_revision?
  (!@current_resource.revision.nil?) && (target_revision.strip.to_i(16) == @current_resource.revision.strip.to_i(16))
end

#define_resource_requirements ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 44

def define_resource_requirements
  # Parent directory of the target must exist.
  requirements.assert(:checkout, :sync) do |a|
    dirname = ::File.dirname(@new_resource.destination)
    a.assertion { ::File.directory?(dirname) }
    a.whyrun("Directory #{dirname} does not exist, this run will fail unless it has been previously created. Assuming it would have been created.")
    a.failure_message(Chef::Exceptions::MissingParentDirectory,
      "Cannot clone #{@new_resource} to #{@new_resource.destination}, the enclosing directory #{dirname} does not exist")
  end


  requirements.assert(:all_actions) do |a|
    a.assertion { !(@new_resource.revision =~ /^origin\//) }
    a.failure_message Chef::Exceptions::InvalidRemoteGitReference,
       "Deploying remote branches is not supported. " +
       "Specify the remote branch as a local branch for " +
       "the git repository you're deploying from " +
       "(ie: '#{@new_resource.revision.gsub('origin/', '')}' rather than '#{@new_resource.revision}')."
  end

  requirements.assert(:all_actions) do |a|
    # this can't be recovered from in why-run mode, because nothing that
    # we do in the course of a run is likely to create a valid target_revision
    # if we can't resolve it up front.
    a.assertion { target_revision != nil }
    a.failure_message Chef::Exceptions::UnresolvableGitReference,
      "Unable to parse SHA reference for '#{@new_resource.revision}' in repository '#{@new_resource.repository}'. " +
      "Verify your (case-sensitive) repository URL and revision.\n" +
      "`git ls-remote` output: #{@resolved_reference}"
  end
end

#enable_submodules ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 165

def enable_submodules
  if @new_resource.enable_submodules
    converge_by("enable git submodules for #{@new_resource}") do
      Chef::Log.info "#{@new_resource} synchronizing git submodules"
      command = "git submodule sync"
      shell_out!(command, run_options(:cwd => @new_resource.destination))
      Chef::Log.info "#{@new_resource} enabling git submodules"
      # the --recursive flag means we require git 1.6.5+ now, see CHEF-1827
      command = "git submodule update --init --recursive"
      shell_out!(command, run_options(:cwd => @new_resource.destination))
    end
  end
end

#existing_git_clone? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 112

def existing_git_clone?
  ::File.exist?(::File.join(@new_resource.destination, ".git"))
end

#fetch_updates ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 179

def fetch_updates
  setup_remote_tracking_branches(@new_resource.remote, @new_resource.repository)
  converge_by("fetch updates for #{@new_resource.remote}") do
    # since we're in a local branch already, just reset to specified revision rather than merge
    fetch_command = "git fetch #{@new_resource.remote} && git fetch #{@new_resource.remote} --tags && git reset --hard #{target_revision}"
    Chef::Log.debug "Fetching updates from #{new_resource.remote} and resetting to revision #{target_revision}"
    shell_out!(fetch_command, run_options(:cwd => @new_resource.destination))
  end
end

#find_current_revision ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 120

def find_current_revision
  Chef::Log.debug("#{@new_resource} finding current git revision")
  if ::File.exist?(::File.join(cwd, ".git"))
    # 128 is returned when we're not in a git repo. this is fine
    result = shell_out!('git rev-parse HEAD', :cwd => cwd, :returns => [0,128]).stdout.strip
  end
  sha_hash?(result) ? result : nil
end

#load_current_resource ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 36

def load_current_resource
  @resolved_reference = nil
  @current_resource = Chef::Resource::Git.new(@new_resource.name)
  if current_revision = find_current_revision
    @current_resource.revision current_revision
  end
end

#multiple_remotes?(check_remote_command_result) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 213

def multiple_remotes?(check_remote_command_result)
  check_remote_command_result.exitstatus == 2
end

#remote_matches?(remote_url, check_remote_command_result) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 217

def remote_matches?(remote_url, check_remote_command_result)
  check_remote_command_result.stdout.strip.eql?(remote_url)
end

#remote_resolve_reference ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 237

def remote_resolve_reference
  Chef::Log.debug("#{@new_resource} resolving remote reference")
  # The sha pointed to by an annotated tag is identified by the
  # '^{}' suffix appended to the tag. In order to resolve
  # annotated tags, we have to search for "revision*" and
  # post-process. Special handling for 'HEAD' to ignore a tag
  # named 'HEAD'.
  rev_pattern = case @new_resource.revision
                when '', 'HEAD'
                  'HEAD'
                else
                  @new_resource.revision + '*'
                end
  command = git("ls-remote \"#{@new_resource.repository}\"", rev_pattern)
  @resolved_reference = shell_out!(command, run_options).stdout
  ref_lines = @resolved_reference.split("\n")
  refs = ref_lines.map { |line| line.split("\t") }
  # first try for ^{} indicating the commit pointed to by an
  # annotated tag
  tagged_commit = refs.find { |m| m[1].end_with?("#{@new_resource.revision}^{}") }
  # It is possible for a user to create a tag named 'HEAD'.
  # Using such a degenerate annotated tag would be very
  # confusing. We avoid the issue by disallowing the use of
  # annotated tags named 'HEAD'.
  if tagged_commit && rev_pattern != 'HEAD'
    tagged_commit[0]
  else
    found = refs.find { |m| m[1].end_with?(@new_resource.revision) }
    if found
      found[0]
    else
      nil
    end
  end
end

#setup_remote_tracking_branches(remote_name, remote_url) ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 189

def setup_remote_tracking_branches(remote_name, remote_url)
  converge_by("set up remote tracking branches for #{remote_url} at #{remote_name}") do
    Chef::Log.debug "#{@new_resource} configuring remote tracking branches for repository #{remote_url} "+
      "at remote #{remote_name}"
    check_remote_command = "git config --get remote.#{remote_name}.url"
    remote_status = shell_out!(check_remote_command, run_options(:cwd => @new_resource.destination, :returns => [0,1,2]))
    case remote_status.exitstatus
    when 0, 2
      # * Status 0 means that we already have a remote with this name, so we should update the url
      #   if it doesn't match the url we want.
      # * Status 2 means that we have multiple urls assigned to the same remote (not a good idea)
      #   which we can fix by replacing them all with our target url (hence the --replace-all option)

      if multiple_remotes?(remote_status) || !remote_matches?(remote_url,remote_status)
        update_remote_url_command = "git config --replace-all remote.#{remote_name}.url #{remote_url}"
        shell_out!(update_remote_url_command, run_options(:cwd => @new_resource.destination))
      end
    when 1
      add_remote_command = "git remote add #{remote_name} #{remote_url}"
      shell_out!(add_remote_command, run_options(:cwd => @new_resource.destination))
    end
  end
end

#target_dir_non_existent_or_empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 116

def target_dir_non_existent_or_empty?
  !::File.exist?(@new_resource.destination) || Dir.entries(@new_resource.destination).sort == ['.','..']
end

#target_revision ⇒ Object Also known as: revision_slug 



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# File 'lib/chef/provider/git.rb', line 225

def target_revision
  @target_revision ||= begin
    if sha_hash?(@new_resource.revision)
      @target_revision = @new_resource.revision
    else
      @target_revision = remote_resolve_reference
    end
  end
end

#whyrun_supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 32

def whyrun_supported?
  true
end