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# Schedules a file to be installed by the 'install' target, but first
# transformed by configure_file(... @ONLY) as well as by changing the
# shell script's hashbang (#!) line to use the absolute path to the
# interpreter in the path of the user running ./configure (or CMake equiv.).
#
# Hashbangs are not transformed when in binary packaging or cross-compiling
# mode because that can result in inserting paths on the build system
# that are not valid on the target system.
#
# _dstdir: absolute path to the directory in which to install the transformed
# source file
# _srcfile: path relevant to CMAKE_CURRENT_SOURCE_DIR pointing to the shell
# script to install
# [_dstfilename]: an optional argument for how to (re)name the file as
# it's installed inside _dstdir
macro(InstallShellScript _dstdir _srcfile)
if (NOT "${ARGN}" STREQUAL "")
set(_dstfilename ${ARGN})
else ()
get_filename_component(_dstfilename ${_srcfile} NAME)
endif ()
set(orig_file ${CMAKE_CURRENT_SOURCE_DIR}/${_srcfile})
set(configed_file ${CMAKE_CURRENT_BINARY_DIR}/${_srcfile})
set(dehashbanged_file ${CMAKE_CURRENT_BINARY_DIR}/${_srcfile}.dehashbanged)
configure_file(${orig_file} ${configed_file} @ONLY)
file(READ ${configed_file} _srclines)
file(WRITE ${dehashbanged_file} "")
if (NOT BINARY_PACKAGING_MODE AND NOT CMAKE_CROSSCOMPILING)
set(_regex "^#![ ]*/usr/bin/env[ ]+([^\n ]*)")
string(REGEX MATCH ${_regex} _match ${_srclines})
if (_match)
set(_shell ${CMAKE_MATCH_1})
if ( (${_shell} STREQUAL "python" OR ${_shell} STREQUAL "python3") AND PYTHON_EXECUTABLE )
set(${_shell}_interp ${PYTHON_EXECUTABLE})
else ()
find_program(${_shell}_interp ${_shell})
endif ()
if (NOT ${_shell}_interp)
message(FATAL_ERROR
"Absolute path to interpreter '${_shell}' not found, "
"failed to configure shell script: ${orig_file}")
endif ()
string(REGEX REPLACE ${_regex} "#!${${_shell}_interp}"
_srclines "${_srclines}")
endif ()
endif ()
file(WRITE ${dehashbanged_file} "${_srclines}")
install(PROGRAMS ${dehashbanged_file}
DESTINATION ${_dstdir}
RENAME ${_dstfilename})
endmacro(InstallShellScript)
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