115 lines
3.5 KiB
Ruby
115 lines
3.5 KiB
Ruby
require_dependency 'sass/discourse_sass_compiler'
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class DiscourseStylesheets
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CACHE_PATH = 'uploads/stylesheet-cache'
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MANIFEST_DIR = "#{Rails.root}/tmp/cache/assets/#{Rails.env}"
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MANIFEST_FULL_PATH = "#{MANIFEST_DIR}/stylesheet-manifest"
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@lock = Mutex.new
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def self.stylesheet_link_tag(target = :desktop)
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builder = self.new(target)
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@lock.synchronize do
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builder.compile unless File.exists?(builder.stylesheet_fullpath)
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builder.ensure_digestless_file
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%[<link href="#{Rails.env.production? ? builder.stylesheet_relpath : builder.stylesheet_relpath_no_digest + '?body=1'}" media="screen" rel="stylesheet" />].html_safe
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end
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end
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def self.compile(target = :desktop, opts={})
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@lock.synchronize do
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FileUtils.rm(MANIFEST_FULL_PATH, force: true) if opts[:force] # Force a recompile, even in production env
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builder = self.new(target)
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builder.compile
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builder.stylesheet_filename
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end
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end
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def self.last_file_updated
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if Rails.env.production?
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@last_file_updated ||= if File.exists?(MANIFEST_FULL_PATH)
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File.readlines(MANIFEST_FULL_PATH, 'r')[0]
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else
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mtime = max_file_mtime
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FileUtils.mkdir_p(MANIFEST_DIR)
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File.open(MANIFEST_FULL_PATH, "w") { |f| f.print(mtime) }
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mtime
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end
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else
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max_file_mtime
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end
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end
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def self.max_file_mtime
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[ "#{Rails.root}/app/assets/stylesheets/**/*.*css",
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"#{Rails.root}/plugins/**/*.*css",
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"#{Rails.root}/plugins/**/plugin.rb" ].map do |pattern|
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Dir.glob(pattern).map { |x| File.mtime(x) }.max
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end.compact.max.to_i
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end
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def initialize(target = :desktop)
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@target = target
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end
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def compile
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scss = File.read("#{Rails.root}/app/assets/stylesheets/#{@target}.scss")
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css = begin
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DiscourseSassCompiler.compile(scss, @target)
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rescue Sass::SyntaxError => e
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Rails.logger.error "Stylesheet failed to compile for '#{@target}'! Recompiling without plugins and theming."
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Rails.logger.error e.sass_backtrace_str("#{@target} stylesheet")
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DiscourseSassCompiler.compile(scss + DiscourseSassCompiler.error_as_css(e, "#{@target} stylesheet"), @target, safe: true)
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end
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FileUtils.mkdir_p(cache_fullpath)
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File.open(stylesheet_fullpath, "w") do |f|
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f.puts css
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end
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css
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end
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def ensure_digestless_file
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# file without digest is only for auto-reloading css in dev env
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unless Rails.env.production? || (File.exist?(stylesheet_fullpath_no_digest) && File.mtime(stylesheet_fullpath) == File.mtime(stylesheet_fullpath_no_digest))
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FileUtils.cp(stylesheet_fullpath, stylesheet_fullpath_no_digest)
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end
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end
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def cache_fullpath
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"#{Rails.root}/public/#{CACHE_PATH}"
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end
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def stylesheet_fullpath
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"#{cache_fullpath}/#{stylesheet_filename}"
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end
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def stylesheet_fullpath_no_digest
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"#{cache_fullpath}/#{stylesheet_filename_no_digest}"
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end
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def stylesheet_relpath
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"/#{CACHE_PATH}/#{stylesheet_filename}"
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end
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def stylesheet_relpath_no_digest
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"/#{CACHE_PATH}/#{stylesheet_filename_no_digest}"
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end
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def stylesheet_filename
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"#{@target}_#{digest}.css"
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end
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def stylesheet_filename_no_digest
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"#{@target}.css"
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end
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# digest encodes the things that trigger a recompile
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def digest
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@digest ||= begin
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theme = (cs = ColorScheme.enabled) ? "#{cs.id}-#{cs.version}" : 0
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category_updated = Category.last_updated_at
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Digest::SHA1.hexdigest("#{RailsMultisite::ConnectionManagement.current_db}-#{theme}-#{DiscourseStylesheets.last_file_updated}-#{category_updated}")
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end
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end
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end
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