overcommit/lib/overcommit/hook/pre_commit/image_optim.rb at main · sds/overcommit · GitHub

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# frozen_string_literal: true

module Overcommit::Hook::PreCommit

# Checks for images that can be optimized with `image_optim`.

# @see https://github.com/toy/image_optim

class ImageOptim < Base

def run

result = execute(command, args: applicable_files)

return [:fail, result.stdout + result.stderr] unless result.success?

optimized_files = extract_optimized_files(result.stdout)

return :pass if optimized_files.empty?

output = "The following images are optimizable:\n#{optimized_files.join("\n")}"

output += "\n\nOptimize them by running `#{command.join(' ')} #{optimized_files.join(' ')}`"

[:fail, output]

end

private

def extract_optimized_files(output)

output.split("\n").

select { |line| line =~ /^\d+/ }.

map { |line| line.split(/\s+/).last }

end

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