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Merge pull request #1319 from middleman/builder_api

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Separate Build from Thor
This commit is contained in:
Thomas Reynolds 2014-07-11 09:33:39 -07:00
commit 1f69967652
7 changed files with 317 additions and 226 deletions
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1
CHANGELOG.md
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@ -1,6 +1,7 @@
master
===
* Builder extracted from Thor. `after_build` hook now passes an instance of a Builder instead of the Thor CLI.
* New FileWatcher API.
* Remove the `partials_dir` setting. Partials should live next to content, or be addressed with absolute paths.
* Partials must be named with a leading underscore. `_my_snippet.html.erb`, not `my_snippet.html.erb`.

268
middleman-cli/lib/middleman-cli/build.rb
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@ -1,18 +1,9 @@
require 'fileutils'
require 'set'
# CLI Module
module Middleman::Cli
# Alias "b" to "build"
Base.map('b' => 'build')
# The CLI Build class
class Build < Thor
include Thor::Actions
attr_reader :debugging
attr_accessor :had_errors
check_unknown_options!
namespace :build
@ -53,250 +44,85 @@ module Middleman::Cli
require 'middleman-core'
require 'middleman-core/logger'
require 'middleman-core/rack'
require 'rack'
require 'rack/mock'
require 'find'
@debugging = Middleman::Cli::Base.respond_to?(:debugging) && Middleman::Cli::Base.debugging
self.had_errors = false
require 'middleman-core/builder'
require 'fileutils'
env = options['environment'].to_sym
verbose = options['verbose'] ? 0 : 1
instrument = options['instrument']
app = ::Middleman::Application.new do
@app = ::Middleman::Application.new do
config[:mode] = :build
config[:environment] = env
config[:show_exceptions] = false
::Middleman::Logger.singleton(verbose, instrument)
end
opts = {}
opts[:glob] = options['glob'] if options.key?('glob')
opts[:clean] = options['clean']
builder = Middleman::Builder.new(@app,
glob: options['glob'],
clean: options['clean'])
app.run_hook :before_build, self
builder.on_build_event(&method(:on_event))
action BuildAction.new(self, app, opts)
app.run_hook :after_build, self
app.config_context.execute_after_build_callbacks(self)
if had_errors && !debugging
if builder.run!
clean_directories! if options['clean']
else
msg = 'There were errors during this build'
unless options['verbose']
msg << ', re-run with `middleman build --verbose` to see the full exception.'
end
shell.say msg, :red
end
exit(1) if had_errors
end
# Static methods
class << self
def exit_on_failure?
true
end
end
end
# A Thor Action, modular code, which does the majority of the work.
class BuildAction < ::Thor::Actions::EmptyDirectory
attr_reader :source
attr_reader :logger
# Setup the action
#
# @param [Middleman::Cli::Build] base
# @param [Hash] config
def initialize(base, app, config={})
@app = app
@source_dir = Pathname(@app.source_dir)
@build_dir = Pathname(@app.config[:build_dir])
@to_clean = Set.new
@logger = @app.logger
rack_app = ::Middleman::Rack.new(@app).to_app
@rack = ::Rack::MockRequest.new(rack_app)
super(base, @build_dir, config)
end
# Execute the action
# @return [void]
def invoke!
queue_current_paths if should_clean?
execute!
clean! if should_clean?
end
protected
# Remove files which were not built in this cycle
# @return [void]
def clean!
@to_clean.each do |f|
base.remove_file f, force: true
end
Dir[@build_dir.join('**', '*')].select { |d| File.directory?(d) }.each do |d|
base.remove_file d, force: true if directory_empty? d
exit(1)
end
end
# Whether we should clean the build
# @return [Boolean]
def should_clean?
@config[:clean]
# Tell Thor to send an exit status on a failure.
def self.exit_on_failure?
true
end
# Whether the given directory is empty
# @param [String, Pathname] directory
# @return [Boolean]
def directory_empty?(directory)
Pathname(directory).children.empty?
end
no_tasks do
# Get a list of all the file paths in the destination folder and save them
# for comparison against the files we build in this cycle
# @return [void]
def queue_current_paths
return unless File.exist?(@build_dir)
paths = ::Middleman::Util.all_files_under(@build_dir).map(&:realpath).select(&:file?)
@to_clean += paths.select do |path|
path.to_s !~ /\/\./ || path.to_s =~ /\.(htaccess|htpasswd)/
end
return unless RUBY_PLATFORM =~ /darwin/
# handle UTF-8-MAC filename on MacOS
@to_clean = @to_clean.map { |path| path.to_s.encode('UTF-8', 'UTF-8-MAC') }
end
# Actually build the app
# @return [void]
def execute!
# Sort order, images, fonts, js/css and finally everything else.
sort_order = %w(.png .jpeg .jpg .gif .bmp .svg .svgz .ico .woff .otf .ttf .eot .js .css)
# Pre-request CSS to give Compass a chance to build sprites
logger.debug '== Prerendering CSS'
@app.sitemap.resources.select do |resource|
resource.ext == '.css'
end.each(&method(:build_resource))
logger.debug '== Checking for generated images'
# Double-check for generated images
@app.files.find_new_files((@source_dir + @app.config[:images_dir]).relative_path_from(@app.root_path))
@app.sitemap.ensure_resource_list_updated!
# Sort paths to be built by the above order. This is primarily so Compass can
# find files in the build folder when it needs to generate sprites for the
# css files
logger.debug '== Building files'
resources = @app.sitemap.resources.sort_by do |r|
sort_order.index(r.ext) || 100
end
if @build_dir.expand_path.relative_path_from(@source_dir).to_s =~ /\A[.\/]+\Z/
raise ":build_dir (#{@build_dir}) cannot be a parent of :source_dir (#{@source_dir})"
end
# Loop over all the paths and build them.
resources.reject do |resource|
resource.ext == '.css'
end.each(&method(:build_resource))
::Middleman::Profiling.report('build')
end
def build_resource(resource)
return if @config[:glob] && !File.fnmatch(@config[:glob], resource.destination_path)
output_path = render_to_file(resource)
return unless should_clean? && output_path.exist?
if RUBY_PLATFORM =~ /darwin/
# handle UTF-8-MAC filename on MacOS
@to_clean.delete(output_path.realpath.to_s.encode('UTF-8', 'UTF-8-MAC'))
else
@to_clean.delete(output_path.realpath)
end
end
# Render a resource to a file.
#
# @param [Middleman::Sitemap::Resource] resource
# @return [Pathname] The full path of the file that was written
def render_to_file(resource)
output_file = @build_dir + resource.destination_path.gsub('%20', ' ')
if resource.binary?
if !output_file.exist?
base.say_status :create, output_file, :green
elsif FileUtils.compare_file(resource.source_file, output_file)
base.say_status :identical, output_file, :blue
return output_file
# Handles incoming events from the builder.
# @param [Symbol] event_type The type of event.
# @param [String] contents The event contents.
# @param [String] extra The extra information.
# @return [void]
def on_event(event_type, target, extra=nil)
case event_type
when :error
say_status :error, target, :red
shell.say extra, :red if options['verbose']
when :deleted
say_status :remove, target, :green
when :created
say_status :create, target, :green
when :identical
say_status :identical, target, :blue
when :updated
say_status :updated, target, :yellow
else
base.say_status :update, output_file, :yellow
end
output_file.dirname.mkpath
FileUtils.cp(resource.source_file, output_file)
else
begin
response = @rack.get(URI.escape(resource.request_path))
if response.status == 200
base.create_file(output_file, binary_encode(response.body))
else
handle_error(output_file, response.body)
end
rescue => e
handle_error(output_file, "#{e}\n#{e.backtrace.join("\n")}", e)
say_status event_type, extra, :blue
end
end
output_file
end
# Find empty directories in the build folder and remove them.
# @return [Boolean]
def clean_directories!
all_build_files = File.join(@app.config[:build_dir], '**', '*')
def handle_error(file_name, response, e=Thor::Error.new(response))
base.had_errors = true
empty_directories = Dir[all_build_files].select do |d|
File.directory?(d)
end
base.say_status :error, file_name, :red
if base.debugging
raise e
elsif base.options['verbose']
base.shell.say response, :red
empty_directories.each do |d|
remove_file d, force: true if Pathname(d).children.empty?
end
end
end
def binary_encode(string)
string.force_encoding('ascii-8bit') if string.respond_to?(:force_encoding)
string
end
end
end
# Quiet down create file
class ::Thor::Actions::CreateFile
def on_conflict_behavior(&block)
if identical?
say_status :identical, :blue
else
say_status :update, :yellow
block.call unless pretend?
end
end
# Alias "b" to "build"
Base.map('b' => 'build')
end

9
middleman-core/fixtures/clean-app/config.rb
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@ -0,0 +1,9 @@
proxy "/fake.html", "/real.html", layout: false
ignore "/should_be_ignored.html"
ignore "/should_be_ignored2.html"
proxy "/target_ignore.html", "/should_be_ignored3.html", ignore: true
%w(one two).each do |num|
proxy "/fake/#{num}.html", "/real/index.html", locals: { num: num }
end

255
middleman-core/lib/middleman-core/builder.rb Normal file
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@ -0,0 +1,255 @@
require 'pathname'
require 'fileutils'
require 'tempfile'
require 'middleman-core/rack'
require 'middleman-core/contracts'
module Middleman
class Builder
extend Forwardable
include Contracts
# Make app & events available to `after_build` callbacks.
attr_reader :app, :events
# Logger comes from App.
def_delegator :@app, :logger
# Sort order, images, fonts, js/css and finally everything else.
SORT_ORDER = %w(.png .jpeg .jpg .gif .bmp .svg .svgz .ico .woff .otf .ttf .eot .js .css)
# Create a new Builder instance.
# @param [Middleman::Application] app The app to build.
# @param [Hash] opts The builder options
def initialize(app, opts={})
@app = app
@source_dir = Pathname(@app.source_dir)
@build_dir = Pathname(@app.config[:build_dir])
if @build_dir.expand_path.relative_path_from(@source_dir).to_s =~ /\A[.\/]+\Z/
raise ":build_dir (#{@build_dir}) cannot be a parent of :source_dir (#{@source_dir})"
end
@glob = opts.fetch(:glob)
@cleaning = opts.fetch(:clean)
@_event_callbacks = []
rack_app = ::Middleman::Rack.new(@app).to_app
@rack = ::Rack::MockRequest.new(rack_app)
end
# Run the build phase.
# @return [Boolean] Whether the build was successful.
Contract None => Bool
def run!
@has_error = false
@events = {}
@app.run_hook :before_build, self
queue_current_paths if @cleaning
prerender_css
output_files
clean if @cleaning
::Middleman::Profiling.report('build')
# Run hooks
@app.run_hook :after_build, self
@app.config_context.execute_after_build_callbacks(self)
!@has_error
end
# Attach callbacks for build events.
# @return [Array<Proc>] All the attached events.
Contract Proc => ArrayOf[Proc]
def on_build_event(&block)
@_event_callbacks << block if block_given?
@_event_callbacks
end
# Pre-request CSS to give Compass a chance to build sprites
# @return [Array<Resource>] List of css resources that were output.
Contract None => ResourceList
def prerender_css
logger.debug '== Prerendering CSS'
css_files = @app.sitemap.resources.select do |resource|
resource.ext == '.css'
end.each(&method(:output_resource))
logger.debug '== Checking for Compass sprites'
# Double-check for compass sprites
@app.files.find_new_files((@source_dir + @app.config[:images_dir]).relative_path_from(@app.root_path))
@app.sitemap.ensure_resource_list_updated!
css_files
end
# Find all the files we need to output and do so.
# @return [Array<Resource>] List of resources that were output.
Contract None => ResourceList
def output_files
logger.debug '== Building files'
# Sort paths to be built by the above order. This is primarily so Compass can
# find files in the build folder when it needs to generate sprites for the
# css files.
#
# Loop over all the paths and build them.
@app.sitemap.resources
.sort_by { |resource| SORT_ORDER.index(resource.ext) || 100 }
.reject { |resource| resource.ext == '.css' }
.select { |resource| !@glob || File.fnmatch(@glob, resource.destination_path) }
.each(&method(:output_resource))
end
# Figure out the correct event mode.
# @param [Pathname] output_file The output file path.
# @param [String] source The source file path.
# @return [Symbol]
Contract Pathname, String => Symbol
def which_mode(output_file, source)
if !output_file.exist?
:created
else
FileUtils.compare_file(source.to_s, output_file.to_s) ? :identical : :updated
end
end
# Create a tempfile for a given output with contents.
# @param [Pathname] output_file The output path.
# @param [String] contents The file contents.
# @return [Tempfile]
Contract Pathname, String => Tempfile
def write_tempfile(output_file, contents)
file = Tempfile.new([
File.basename(output_file),
File.extname(output_file)])
file.binmode
file.write(contents)
file.close
file
end
# Actually export the file.
# @param [Pathname] output_file The path to output to.
# @param [String|Pathname] source The source path or contents.
# @return [void]
Contract Pathname, Or[String, Pathname] => Any
def export_file!(output_file, source)
source = write_tempfile(output_file, source.to_s) if source.is_a? String
method, source_path = if source.is_a? Tempfile
[FileUtils.method(:mv), source.path]
else
[FileUtils.method(:cp), source.to_s]
end
mode = which_mode(output_file, source_path)
if mode == :created || mode == :updated
FileUtils.mkdir_p(output_file.dirname)
method.call(source_path, output_file.to_s)
end
source.unlink if source.is_a? Tempfile
trigger(mode, output_file)
end
# Try to output a resource and capture errors.
# @param [Middleman::Sitemap::Resource] resource The resource.
# @return [void]
Contract IsA['Middleman::Sitemap::Resource'] => Any
def output_resource(resource)
output_file = @build_dir + resource.destination_path.gsub('%20', ' ')
begin
if resource.binary?
export_file!(output_file, Pathname(resource.source_file))
else
response = @rack.get(URI.escape(resource.request_path))
# If we get a response, save it to a tempfile.
if response.status == 200
export_file!(output_file, binary_encode(response.body))
else
@has_error = true
trigger(:error, output_file, response.body)
end
end
rescue => e
@has_error = true
trigger(:error, output_file, "#{e}\n#{e.backtrace.join("\n")}")
end
return unless @cleaning
return unless output_file.exist?
# handle UTF-8-MAC filename on MacOS
cleaned_name = if RUBY_PLATFORM =~ /darwin/
output_file.to_s.encode('UTF-8', 'UTF-8-MAC')
else
output_file
end
@to_clean.delete(Pathname(cleaned_name))
end
# Get a list of all the paths in the destination folder and save them
# for comparison against the files we build in this cycle
# @return [void]
Contract None => Any
def queue_current_paths
@to_clean = []
return unless File.exist?(@app.config[:build_dir])
paths = ::Middleman::Util.all_files_under(@app.config[:build_dir]).map do |path|
Pathname(path)
end
@to_clean = paths.select do |path|
path.to_s !~ /\/\./ || path.to_s =~ /\.(htaccess|htpasswd)/
end
# handle UTF-8-MAC filename on MacOS
@to_clean = @to_clean.map do |path|
if RUBY_PLATFORM =~ /darwin/
Pathname(path.to_s.encode('UTF-8', 'UTF-8-MAC'))
else
Pathname(path)
end
end
end
# Remove files which were not built in this cycle
Contract None => ArrayOf[Pathname]
def clean
@to_clean.each do |f|
FileUtils.rm(f)
trigger(:deleted, f)
end
end
Contract String => String
def binary_encode(string)
string.force_encoding('ascii-8bit') if string.respond_to?(:force_encoding)
string
end
Contract Symbol, Or[String, Pathname], Maybe[String] => Any
def trigger(event_type, target, extra=nil)
@events[event_type] ||= []
@events[event_type] << target
@_event_callbacks.each do |callback|
callback.call(event_type, target, extra)
end
end
end
end

2
middleman-core/lib/middleman-core/core_extensions/show_exceptions.rb
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@ -6,7 +6,7 @@ module Middleman::CoreExtensions
def initialize(app, options_hash={}, &block)
super
app.config.define_setting :show_exceptions, true, 'Whether to catch and display exceptions'
app.config.define_setting :show_exceptions, !!ENV['TEST'], 'Whether to catch and display exceptions'
end
def after_configuration

4
middleman-core/lib/middleman-core/extensions/gzip.rb
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@ -63,10 +63,10 @@ class Middleman::Extensions::Gzip < ::Middleman::Extension
total_savings += (old_size - new_size)
size_change_word = (old_size - new_size) > 0 ? 'smaller' : 'larger'
builder.say_status :gzip, "#{output_filename} (#{NumberHelpers.new.number_to_human_size((old_size - new_size).abs)} #{size_change_word})"
builder.trigger :gzip, "#{output_filename} (#{NumberHelpers.new.number_to_human_size((old_size - new_size).abs)} #{size_change_word})"
end
builder.say_status :gzip, "Total gzip savings: #{NumberHelpers.new.number_to_human_size(total_savings)}", :blue
builder.trigger :gzip, "Total gzip savings: #{NumberHelpers.new.number_to_human_size(total_savings)}"
I18n.locale = old_locale
end

4
middleman-core/lib/middleman-core/step_definitions/builder_steps.rb
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@ -34,12 +34,12 @@ end
Given /^a built app at "([^\"]*)"$/ do |path|
step %Q{a fixture app "#{path}"}
step %Q{I run `middleman build`}
step %Q{I run `middleman build --verbose`}
end
Given /^was successfully built$/ do
step %Q{a directory named "build" should exist}
step %Q{the exit status should be 0}
step %Q{a directory named "build" should exist}
end
Given /^a successfully built app at "([^\"]*)"$/ do |path|