# $FreeBSD: Mk/Uses/shebangfix.mk 334392 2013-11-20 07:29:08Z bapt $
#
# common templates for replacing #! interpreters in scripts file
#
# MAINTAINER: portmgr@FreeBSD.org
#
# Feature:	shebangfix
# Usage:	USES=shebangfix
#
# To define that the file to modify are: ${WRKSRC}/path1/file and all the .pl files in ${WRKSRC}/path2:
#
# SHEBANG_FILES=	path1/file path2/*.pl
#
# To define new shebang scheme, in the port Makefile add:
#
# SHEBANG_LANG=	lua
# lua_OLD_CMD=	/usr/bin/lua
# lua_CMD=	${LOCALBASE}/bin/lua
#
# To override a definition for example replacing /usr/bin/perl by /usr/bin/env perl
# add to the port Makefile:
# perl_CMD=	${SETENV} perl
#

.if !defined(_INCLUDE_USES_SHEBANGFIX_Mk)
_INCLUDE_USES_SHEBANGFIX_MK=	yes

bash_OLD_CMD?=	/bin/bash
bash_CMD?=	${LOCALBASE}/bin/bash
perl_OLD_CMD?=	/usr/bin/perl
perl_CMD?=	${LOCALBASE}/bin/perl
python_OLD_CMD?=	/usr/bin/python
python_CMD?=	${LOCALBASE}/bin/python
ruby_OLD_CMD?=	/usr/bin/ruby
ruby_CMD?=	${LOCALBASE}/bin/ruby
php_OLD_CMD?=	/usr/bin/php
php_CMD?=	${LOCALBASE}/bin/php

SHEBANG_LANG+=	bash perl python ruby php

.for lang in ${SHEBANG_LANG}
.if !defined(${lang}_CMD)
IGNORE+=	missing definition for ${lang}_CMD
.endif
.if !defined(${lang}_OLD_CMD)
IGNORE+=	missing definition for ${lang}_OLD_CMD
.endif
_SHEBANG_REINPLACE_ARGS+=	-e "1s|^\#![[:space:]]*${${lang}_OLD_CMD}|\#!${${lang}_CMD}|"
.endfor

.PHONY: fix-shebang
pre-patch: fix-shebang

fix-shebang:
	@cd ${WRKSRC}; \
		${ECHO_CMD} ${SHEBANG_FILES} | ${XARGS} ${SED} -i '' ${_SHEBANG_REINPLACE_ARGS}

.endif