Class: Chef::Provider::Git

Inherits:
Chef::Provider show all
Extended by:
Forwardable
Defined in:
lib/chef/provider/git.rb

Constant Summary collapse

GIT_VERSION_PATTERN = 
Regexp.compile('git version (\d+\.\d+.\d+)')

Instance Attribute Summary

Attributes inherited from Chef::Provider

#action, #current_resource, #logger, #new_resource, #recipe_name, #run_context

Instance Method Summary collapse

Methods inherited from Chef::Provider

action, #action_nothing, #check_resource_semantics!, #cleanup_after_converge, #compile_and_converge_action, #converge_by, #converge_if_changed, #cookbook_name, #description, #events, include_resource_dsl?, include_resource_dsl_module, #initialize, #introduced, #node, #process_resource_requirements, provides, provides?, #requirements, #resource_collection, #resource_updated?, #run_action, #set_updated_status, supports?, use_inline_resources, #whyrun_mode?, #whyrun_supported?

Methods included from Mixin::Provides

#provided_as, #provides, #provides?

Methods included from Mixin::DescendantsTracker

#descendants, descendants, direct_descendants, #direct_descendants, find_descendants_by_name, #find_descendants_by_name, #inherited, store_inherited

Methods included from Mixin::LazyModuleInclude

#descendants, #include, #included

Methods included from Mixin::NotifyingBlock

#notifying_block, #subcontext_block

Methods included from DSL::DeclareResource

#build_resource, #declare_resource, #delete_resource, #delete_resource!, #edit_resource, #edit_resource!, #find_resource, #find_resource!, #with_run_context

Methods included from Mixin::ShellOut

#a_to_s, #clean_array, #shell_out, #shell_out!, #shell_out_compact, #shell_out_compact!, #shell_out_compact_timeout, #shell_out_compact_timeout!, #shell_out_with_systems_locale, #shell_out_with_systems_locale!

Methods included from Mixin::PathSanity

#enforce_path_sanity, #sanitized_path

Methods included from Mixin::PowershellOut

#powershell_out, #powershell_out!

Methods included from Mixin::WindowsArchitectureHelper

#assert_valid_windows_architecture!, #disable_wow64_file_redirection, #forced_32bit_override_required?, #is_i386_process_on_x86_64_windows?, #node_supports_windows_architecture?, #node_windows_architecture, #restore_wow64_file_redirection, #valid_windows_architecture?, #with_os_architecture, #wow64_architecture_override_required?, #wow64_directory

Methods included from Mixin::PowershellExec

#powershell_exec

Methods included from DSL::PlatformIntrospection

#docker?, #platform?, #platform_family?, #value_for_platform, #value_for_platform_family

Constructor Details

This class inherits a constructor from Chef::Provider

Instance Method Details

#action_checkout ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 74

def action_checkout
  if target_dir_non_existent_or_empty?
    clone
    if new_resource.enable_checkout
      checkout
    end
    enable_submodules
    add_remotes
  else
    logger.trace "#{new_resource} checkout destination #{cwd} already exists or is a non-empty directory"
  end
end

#action_export ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 87

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

#action_sync ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 94

def action_sync
  if existing_git_clone?
    logger.trace "#{new_resource} current revision: #{current_resource.revision} target revision: #{target_revision}"
    unless current_revision_matches_target_revision?
      fetch_updates
      enable_submodules
      logger.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 142

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
        logger.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 169

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
    git("branch", "-f", new_resource.checkout_branch, sha_ref, cwd: cwd)
    git("checkout", new_resource.checkout_branch, cwd: cwd)
    logger.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 153

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

    clone_cmd = ["clone"]
    clone_cmd << "-o #{remote}" unless remote == "origin"
    clone_cmd << "--depth #{new_resource.depth}" if new_resource.depth
    clone_cmd << "--no-single-branch" if new_resource.depth && git_has_single_branch_option?
    clone_cmd << "\"#{new_resource.repository}\""
    clone_cmd << "\"#{cwd}\""

    logger.info "#{new_resource} cloning repo #{new_resource.repository} to #{cwd}"
    git clone_cmd
  end
end

#current_revision_matches_target_revision? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 232

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 43

def define_resource_requirements
  # Parent directory of the target must exist.
  requirements.assert(:checkout, :sync) do |a|
    dirname = ::File.dirname(cwd)
    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 #{cwd}, 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 '#{new_resource.repository}' '#{rev_search_pattern}'` output: #{@resolved_reference}"
  end
end

#enable_submodules ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 180

def enable_submodules
  if new_resource.enable_submodules
    converge_by("enable git submodules for #{new_resource}") do
      logger.info "#{new_resource} synchronizing git submodules"
      git("submodule", "sync", cwd: cwd)
      logger.info "#{new_resource} enabling git submodules"
      # the --recursive flag means we require git 1.6.5+ now, see CHEF-1827
      git("submodule", "update", "--init", "--recursive", cwd: cwd)
    end
  end
end

#existing_git_clone? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 125

def existing_git_clone?
  ::File.exist?(::File.join(cwd, ".git"))
end

#fetch_updates ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 192

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
    logger.trace "Fetching updates from #{new_resource.remote} and resetting to revision #{target_revision}"
    git("fetch", new_resource.remote, cwd: cwd)
    git("fetch", new_resource.remote, "--tags", cwd: cwd)
    git("reset", "--hard", target_revision, cwd: cwd)
  end
end

#find_current_revision ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 133

def find_current_revision
  logger.trace("#{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 = git("rev-parse", "HEAD", cwd: cwd, returns: [0, 128]).stdout.strip
  end
  sha_hash?(result) ? result : nil
end

#find_revision(refs, revision, suffix = "") ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 272

def find_revision(refs, revision, suffix = "")
  found = refs_search(refs, rev_match_pattern("refs/tags/", revision) + suffix)
  found = refs_search(refs, rev_match_pattern("refs/heads/", revision) + suffix) if found.empty?
  found = refs_search(refs, revision + suffix) if found.empty?
  found
end

#git_gem_version ⇒ Object Also known as: git_minor_version 



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

def git_gem_version
  return @git_gem_version if defined?(@git_gem_version)
  output = git("--version").stdout
  match = GIT_VERSION_PATTERN.match(output)
  if match
    @git_gem_version = Gem::Version.new(match[1])
  else
    logger.warn "Unable to parse git version from '#{output}'"
    @git_gem_version = nil
  end
  @git_gem_version
end

#git_has_single_branch_option? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 108

def git_has_single_branch_option?
  @git_has_single_branch_option ||= !git_gem_version.nil? && git_gem_version >= Gem::Version.new("1.7.10")
end

#git_ls_remote(rev_pattern) ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 295

def git_ls_remote(rev_pattern)
  git("ls-remote", "\"#{new_resource.repository}\"", "\"#{rev_pattern}\"").stdout
end

#load_current_resource ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 35

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 224

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

#refs_search(refs, pattern) ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 299

def refs_search(refs, pattern)
  refs.find_all { |m| m[1] == pattern }
end

#remote_matches?(remote_url, check_remote_command_result) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/chef/provider/git.rb', line 228

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 248

def remote_resolve_reference
  logger.trace("#{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'.
  @resolved_reference = git_ls_remote(rev_search_pattern)
  refs = @resolved_reference.split("\n").map { |line| line.split("\t") }
  # First try for ^{} indicating the commit pointed to by an
  # annotated tag.
  # 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 rev_search_pattern != "HEAD"
    found = find_revision(refs, new_resource.revision, "^{}")
  else
    found = refs_search(refs, "HEAD")
  end
  found = find_revision(refs, new_resource.revision) if found.empty?
  found.size == 1 ? found.first[0] : nil
end

#rev_match_pattern(prefix, revision) ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 279

def rev_match_pattern(prefix, revision)
  if revision.start_with?(prefix)
    revision
  else
    prefix + revision
  end
end

#rev_search_pattern ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 287

def rev_search_pattern
  if ["", "HEAD"].include? new_resource.revision
    "HEAD"
  else
    new_resource.revision + "*"
  end
end

#setup_remote_tracking_branches(remote_name, remote_url) ⇒ Object 



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# File 'lib/chef/provider/git.rb', line 203

def setup_remote_tracking_branches(remote_name, remote_url)
  converge_by("set up remote tracking branches for #{remote_url} at #{remote_name}") do
    logger.trace "#{new_resource} configuring remote tracking branches for repository #{remote_url} " + "at remote #{remote_name}"
    check_remote_command = ["config", "--get", "remote.#{remote_name}.url"]
    remote_status = git(check_remote_command, cwd: cwd, 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)
        git("config", "--replace-all", "remote.#{remote_name}.url", remote_url, cwd: cwd)
      end
    when 1
      git("remote", "add", remote_name, remote_url, cwd: cwd)
    end
  end
end

#target_dir_non_existent_or_empty? ⇒ Boolean

Returns:

  • (Boolean) 


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

def target_dir_non_existent_or_empty?
  !::File.exist?(cwd) || Dir.entries(cwd).sort == [".", ".."]
end

#target_revision ⇒ Object Also known as: revision_slug 



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# File 'lib/chef/provider/git.rb', line 236

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