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FindRails.cmake
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FindRails.cmake
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#--------------------------------------------------------------------------------
# Copyright (c) 2012-2013, Lars Baehren <[email protected]>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without modification,
# are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#--------------------------------------------------------------------------------
# - Check for the presence of RAILS
#
# The following variables are set when RAILS is found:
# RAILS_FOUND = Set to true, if all components of RAILS
# have been found.
# RAILS_INCLUDES = Include path for the header files of RAILS
# RAILS_LIBRARIES = Link these to use RAILS
# RAILS_LFLAGS = Linker flags (optional)
if (NOT RAILS_FOUND)
if (NOT RAILS_ROOT_DIR)
set (RAILS_ROOT_DIR ${CMAKE_INSTALL_PREFIX})
endif (NOT RAILS_ROOT_DIR)
##_____________________________________________________________________________
## Package dependencies
if (NOT RUBY_FOUND)
set (RUBY_FIND_REQUIRED ${RAILS_FIND_REQUIRED})
find_package (Ruby)
endif (NOT RUBY_FOUND)
##_____________________________________________________________________________
## Check for the executable
find_program (RAILS_EXECUTABLE rails
HINTS ${RAILS_ROOT_DIR} ${CMAKE_INSTALL_PREFIX}
PATH_SUFFIXES bin
)
##_____________________________________________________________________________
## Extract program version
if (RAILS_EXECUTABLE)
## Run rails to display version number
execute_process(
COMMAND ${RAILS_EXECUTABLE} --version
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
RESULT_VARIABLE RAILS_RESULT_VARIABLE
OUTPUT_VARIABLE RAILS_OUTPUT_VARIABLE
ERROR_VARIABLE RAILS_ERROR_VARIABLE
OUTPUT_STRIP_TRAILING_WHITESPACE
)
## Process output in order to extract version number. Rails returns status 0
## if run successfully.
if (NOT RAILS_RESULT_VARIABLE)
## If the Rails installation is incomplete, the '--version' inspection will
## fail and produce a message asking the user to install Rails; this output
## does not contain a version number, hence we need to catch that case.
string(REGEX MATCH "install" RAILS_INSTALL_MISSING ${RAILS_OUTPUT_VARIABLE})
if (NOT RAILS_INSTALL_MISSING)
string(REGEX REPLACE "Rails " "" RAILS_VERSION ${RAILS_OUTPUT_VARIABLE})
if (RAILS_VERSION)
## Convert string to list of numbers
string (REGEX REPLACE "\\." ";" RAILS_VERSION_LIST ${RAILS_VERSION})
## Retrieve individual elements in the list
list(GET RAILS_VERSION_LIST 0 RAILS_VERSION_MAJOR)
list(GET RAILS_VERSION_LIST 1 RAILS_VERSION_MINOR)
list(GET RAILS_VERSION_LIST 2 RAILS_VERSION_PATCH)
endif (RAILS_VERSION)
endif (NOT RAILS_INSTALL_MISSING)
endif (NOT RAILS_RESULT_VARIABLE)
endif (RAILS_EXECUTABLE)
##_____________________________________________________________________________
## Actions taken when all components have been found
if (RAILS_EXECUTABLE)
set (RAILS_FOUND TRUE)
else (RAILS_EXECUTABLE)
set (RAILS_FOUND FALSE)
if (NOT RAILS_FIND_QUIETLY)
if (NOT RAILS_EXECUTABLE)
message (STATUS "Unable to find RAILS executable files!")
endif (NOT RAILS_EXECUTABLE)
endif (NOT RAILS_FIND_QUIETLY)
endif (RAILS_EXECUTABLE)
if (RAILS_FOUND)
if (NOT RAILS_FIND_QUIETLY)
message (STATUS "Found components for RAILS")
message (STATUS "RAILS_ROOT_DIR = ${RAILS_ROOT_DIR}")
message (STATUS "RAILS_EXECUTABLE = ${RAILS_EXECUTABLE}")
endif (NOT RAILS_FIND_QUIETLY)
else (RAILS_FOUND)
if (RAILS_FIND_REQUIRED)
message (FATAL_ERROR "Could not find RAILS!")
endif (RAILS_FIND_REQUIRED)
endif (RAILS_FOUND)
##_____________________________________________________________________________
## Mark advanced variables
mark_as_advanced (
RAILS_ROOT_DIR
RAILS_INCLUDES
RAILS_LIBRARIES
)
endif (NOT RAILS_FOUND)