generate-cr-and-crlf-tests.sh

#!/usr/bin/env bash

set -o errexit || exit
set -o nounset
set -o pipefail

exec 0<&-
APP_NAME=$(basename -- "$0")
DEST_DIR='test/LineBreaks'
COMMENT="This file automatically generated by $APP_NAME (do not modify!)"
mkdir -p -- "$DEST_DIR"/CRLF/Q{M,N}{,B,S}/
# mkdir -p -- "$DEST_DIR"/{CR,CRLF}/Q{M,N}{,B,S}/

handle-break() {
	set -o errexit || exit
	set -o nounset
	set -o pipefail

	local dir="$DEST_DIR/$2/$3"
	local file="$dir/${1##*/}"
	local eof=; if [[ $2 == "CR" ]]; then eof='\r'; else eof='\r\n'; fi
	local module_name="module LineBreaks.$2.Q\1\2.Spec"
	cp -f -- "$1" "$dir/"
	sed -i -- "1s/^/-- $COMMENT\n/" "$file"
	sed -i -- "s/^module Q\(M\|N\)\(\|B\|S\).Spec/$module_name/" "$file"
	sed -zi -- "s/\n/$eof/gm" "$file"
}

echo test/Q{M,N}{,B,S}/Spec.hs | tr ' ' '\n' | while read -r item; do
	x=${item#*/}; x=${x%/*}

	# It seems this line breaks format is not allowed in haskell sources anyway.
	# GHC fails with errors like this:
	#   test/LineBreaks/CR/QM/Spec.hs:1:93: error: Not in scope: `spec'
	# handle-break "$item" "CR"   "$x"

	handle-break "$item" "CRLF" "$x"
done