discourse/lib/sass/discourse_stylesheets.rb

97 lines
3.0 KiB
Ruby

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