Merge pull request #4696 from wp-cli/git-pre-commit-only-check-staged-files

Only check staged files during the pre-commit PHPCS verification

utils/git-pre-commit-script

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+if REV=$(git rev-parse -q --verify HEAD); then
+	against=HEAD
+else
+	# Initial commit: diff against an empty tree object
+	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+fi
+
+FILES=$(git diff-index --name-only --cached --diff-filter=ACMR $against -- )
+
+if [ "$FILES" == "" ]; then
+	echo "No files to check with PHPCS."
+	exit 0
+fi
+
+set -ex
+
+{{PHPCS_BIN}} -s $FILES

utils/git-setup-pre-commit-hook

@@ -25,7 +25,7 @@ fi
 pre_commit_file="$(git rev-parse --git-dir)/hooks/pre-commit"
 
 if [[ ! -f "$pre_commit_file" ]]; then
-	echo -e "#!/bin/bash\nset -ex\n$phpcs_bin" > $pre_commit_file
+	cat utils/git-pre-commit-script | sed 's|{{PHPCS_BIN}}|'$phpcs_bin'|' > $pre_commit_file
 	chmod +x $pre_commit_file
 elif ! grep -q "phpcs" $pre_commit_file; then
 	echo -e "hook file already exists: $pre_commit_file\n\nplease add the below command to your pre-commit file:\n\n$phpcs_bin"