npmprune.sh

#!/bin/sh

TARGET_DIR=node_modules

if [ ! -d $TARGET_DIR ]; then
	echo "$TARGET_DIR" does not exist
	exit 1
fi

PATTERNS="
	__tests__
	_config.yml
	.*ignore
	.babel*
	.circle*
	.documentup*
	.ds_store
	.editorconfig
	.env*
	.git*
	.idea
	.lint*
	.npm*
	.nyc*
	.prettier*
	.tern-project
	.yarn-integrity
	.yarn-metadata.json
	.yarnclean
	.yo-*
	*.coffee
	*.flow*
	*.jst
	*.markdown
	*.md
	*.mkd
	*.swp
	*.tgz
	*appveyor*
	*coveralls*
	*eslint*
	*htmllint*
	*jshint*
	*readme*
	*stylelint*
	*travis*
	*tslint*
	*vscode*
	*wallaby*
	authors
	changelog
	changes
	circle.yml
	component.json
	contributors
	coverage
	doc
	docs
	example
	examples
	grunt*
	gulp*
	jenkins*
	jest.config.*
	jsconfig.json
	karma.conf*
	licence
	licence.txt
	license
	license.txt
	makefile
	npm-debug.log
	powered-test
	prettier.*
	test
	tests
	tsconfig.json
"

PROD_PATTERNS="
	*.map
	*.mts
	*.ts
"

# Add patterns from command-line arguments
[ "$#" -gt 0 ] && PATTERNS="$PATTERNS $(printf '\n%s' "$@")"

if [ "$NODE_ENV" = "production" ]; then
	PATTERNS="$PATTERNS $PROD_PATTERNS"
fi

if [ ! "$NODE_ENV" = "production" ]; then
	echo "$TARGET_DIR size before: $(du -sh $TARGET_DIR | awk '{print $1}')"
fi

find_cmd="find $TARGET_DIR \("
first_pattern=true
printf '%s\n' "$PATTERNS" | (
	while IFS= read -r line; do
		line=$(echo "$line" | xargs)

		# skip empty lines
		if [ -z "$line" ]; then
			continue
		fi

		# add -o if not the first pattern
		if [ "$first_pattern" = false ]; then
			find_cmd="$find_cmd -o"
		else
			first_pattern=false
		fi

		find_cmd="$find_cmd -iname '$line'"
	done

	eval "$find_cmd \) -exec rm -rf {} +"
)

if [ ! "$NODE_ENV" = "production" ]; then
	echo "$TARGET_DIR size after:  $(du -sh $TARGET_DIR | awk '{print $1}')"
fi