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return if Rails.env.production?
require 'png_quantizator'
require 'parallel'
require_relative '../../tooling/lib/tooling/images'
# The amount of variance (in bytes) allowed in
# file size when testing for compression size
namespace :pngquant do
# Returns an array of all images eligible for compression
def doc_images
Dir.glob('doc/**/*.png', File::FNM_CASEFOLD)
end
desc 'GitLab | Pngquant | Compress all documentation PNG images using pngquant'
task :compress do
files = doc_images
puts "Compressing #{files.size} PNG files in doc/**"
Parallel.each(files) do |file|
was_uncompressed, savings = Tooling::Image.compress_image(file)
if was_uncompressed
puts "#{file} was reduced by #{savings} bytes"
end
end
end
desc 'GitLab | Pngquant | Checks that all documentation PNG images have been compressed with pngquant'
task :lint do
files = doc_images
puts "Checking #{files.size} PNG files in doc/**"
uncompressed_files = Parallel.map(files) do |file|
is_uncompressed, _ = Tooling::Image.compress_image(file, true)
if is_uncompressed
puts "Uncompressed file detected: ".color(:red) + file
file
end
end.compact
if uncompressed_files.empty?
puts "All documentation images are optimally compressed!".color(:green)
else
warn(
"The #{uncompressed_files.size} image(s) above have not been optimally compressed using pngquant.".color(:red),
'Please run "bin/rake pngquant:compress" and commit the result.'
)
abort
end
end
end
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