FindEnvModules

Locate an environment module implementation and make commands available to CMake scripts to use them. This is compatible with both Lua-based Lmod and TCL-based EnvironmentModules.

This module is intended for the use case of setting up the compiler and library environment within a CTest Script (ctest -S). It can also be used in a CMake Script (cmake -P).

Note

The loaded environment will not survive past the end of the calling process. Do not use this module in project code (CMakeLists.txt files) to load a compiler environment; it will not be available during the build. Instead load the environment manually before running CMake or using the generated build system.

Example Usage

set(CTEST_BUILD_NAME "CrayLinux-CrayPE-Cray-dynamic")
set(CTEST_BUILD_CONFIGURATION Release)
set(CTEST_BUILD_FLAGS "-k -j8")
set(CTEST_CMAKE_GENERATOR "Unix Makefiles")

...

find_package(EnvModules REQUIRED)

env_module(purge)
env_module(load modules)
env_module(load craype)
env_module(load PrgEnv-cray)
env_module(load craype-knl)
env_module(load cray-mpich)
env_module(load cray-libsci)

set(ENV{CRAYPE_LINK_TYPE} dynamic)

...

Result Variables

This module will set the following variables in your project:

EnvModules_FOUND
True if a compatible environment modules framework was found.

Cache Variables

The following cache variable will be set:

EnvModules_COMMAND
The low level module command to use. Currently supported implementations are the Lua based Lmod and TCL based EnvironmentModules.

Environment Variables

ENV{MODULESHOME}
Usually set by the module environment implementation, used as a hint to locate the module command to execute.

Provided Functions

This defines the following CMake functions for interacting with environment modules:

env_module

Execute an aribitrary module command:

env_module(cmd arg1 ... argN)
env_module(
  COMMAND cmd arg1 ... argN
  [OUTPUT_VARIABLE <out-var>]
  [RESULT_VARIABLE <ret-var>]
)

The options are:

cmd arg1 ... argN
The module sub-command and arguments to execute as if they were passed directly to the module command in your shell environment.
OUTPUT_VARIABLE <out-var>
The standard output from executing the module command.
RESULT_VARIABLE <ret-var>
The return code from executing the module command.
env_module_swap

Swap one module for another:

env_module_swap(out_mod in_mod
  [OUTPUT_VARIABLE <out-var>]
  [RESULT_VARIABLE <ret-var>]
)

This is functionally equivalent to the module swap out_mod in_mod shell command. The options are:

OUTPUT_VARIABLE <out-var>
The standard output from executing the module command.
RESULT_VARIABLE <ret-var>
The return code from executing the module command.
env_module_list

Retrieve the list of currently loaded modules:

env_module_list(<out-var>)

This is functionally equivalent to the module list shell command. The result is stored in <out-var> as a properly formatted CMake semicolon-separated list variable.

env_module_avail

Retrieve the list of available modules:

env_module_avail([<mod-prefix>] <out-var>)

This is functionally equivalent to the module avail <mod-prefix> shell command. The result is stored in <out-var> as a properly formatted CMake semicolon-separated list variable.