Run PHP CodeSniffer for all changed/new files on Git, using Docker

tip.md

Run PHP CodeSniffer for all changed/new files on Git, using Docker

• The -a flag instructs phpcs to execute interactively, so then you can edit the files and re-check it again with no need to run the same phpcs command again. Awesome, eh?
• The Git part:
  • git status --porcelain will show us all files and their state: ?? for a new one, M for modified;
  • We combine egrep and cut to give us exactly what we want, a perfect list.
  • We put this as a subcommand to pass the expected file list to phpcs.
• Docker here is a mere tool. You can enjoy the same functionality with or without it 😉

docker run -it --rm \
  -v $(pwd):/mycode \
  -w /mycode \
  devdrops/php-toolbox \
  phpcs -a --standard=PSR2 \
  $(git status --porcelain | egrep "^(\ M|\?\?)" | cut -c 4-)

FIX

git status --porcelain | egrep "^[ M?]" | cut -c 4- will also provide the deleted files, which will break phpcs execution. Instead, use git status --porcelain | egrep "^(\ M|\?\?)" | cut -c 4- to avoid those deleted files.