vcpkg/scripts/cmake/vcpkg_execute_required_proc...

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CMake

#[===[.md:
# vcpkg_execute_required_process
Execute a process with logging and fail the build if the command fails.
## Usage
```cmake
vcpkg_execute_required_process(
COMMAND <${PERL}> [<arguments>...]
WORKING_DIRECTORY <${CURRENT_BUILDTREES_DIR}/${TARGET_TRIPLET}-dbg>
LOGNAME <build-${TARGET_TRIPLET}-dbg>
[TIMEOUT <seconds>]
[OUTPUT_VARIABLE <var>]
[ERROR_VARIABLE <var>]
)
```
## Parameters
### ALLOW_IN_DOWNLOAD_MODE
Allows the command to execute in Download Mode.
[See execute_process() override](../../scripts/cmake/execute_process.cmake).
### COMMAND
The command to be executed, along with its arguments.
### WORKING_DIRECTORY
The directory to execute the command in.
### LOGNAME
The prefix to use for the log files.
### TIMEOUT
Optional timeout after which to terminate the command.
### OUTPUT_VARIABLE
Optional variable to receive stdout of the command.
### ERROR_VARIABLE
Optional variable to receive stderr of the command.
This should be a unique name for different triplets so that the logs don't conflict when building multiple at once.
## Examples
* [ffmpeg](https://github.com/Microsoft/vcpkg/blob/master/ports/ffmpeg/portfile.cmake)
* [openssl](https://github.com/Microsoft/vcpkg/blob/master/ports/openssl/portfile.cmake)
* [boost](https://github.com/Microsoft/vcpkg/blob/master/ports/boost/portfile.cmake)
* [qt5](https://github.com/Microsoft/vcpkg/blob/master/ports/qt5/portfile.cmake)
#]===]
function(vcpkg_execute_required_process)
cmake_parse_arguments(PARSE_ARGV 0 arg
"ALLOW_IN_DOWNLOAD_MODE"
"WORKING_DIRECTORY;LOGNAME;TIMEOUT;OUTPUT_VARIABLE;ERROR_VARIABLE"
"COMMAND"
)
if(DEFINED arg_UNPARSED_ARGUMENTS)
message(WARNING "${CMAKE_CURRENT_FUNCTION} was passed extra arguments: ${arg_UNPARSED_ARGUMENTS}")
endif()
foreach(required_arg IN ITEMS WORKING_DIRECTORY COMMAND)
if(NOT DEFINED arg_${required_arg})
message(FATAL_ERROR "${required_arg} must be specified.")
endif()
endforeach()
if(NOT DEFINED arg_LOGNAME)
message(WARNING "LOGNAME should be specified.")
set(arg_LOGNAME "required")
endif()
if (VCPKG_DOWNLOAD_MODE AND NOT arg_ALLOW_IN_DOWNLOAD_MODE)
message(FATAL_ERROR
[[
This command cannot be executed in Download Mode.
Halting portfile execution.
]])
endif()
set(log_out "${CURRENT_BUILDTREES_DIR}/${arg_LOGNAME}-out.log")
set(log_err "${CURRENT_BUILDTREES_DIR}/${arg_LOGNAME}-err.log")
set(timeout_param "")
set(output_and_error_same OFF)
set(output_variable_param "")
set(error_variable_param "")
if(DEFINED arg_TIMEOUT)
set(timeout_param TIMEOUT "${arg_TIMEOUT}")
endif()
if(DEFINED arg_OUTPUT_VARIABLE AND DEFINED arg_ERROR_VARIABLE AND arg_OUTPUT_VARIABLE STREQUAL arg_ERROR_VARIABLE)
set(output_variable_param OUTPUT_VARIABLE out_err_var)
set(error_variable_param ERROR_VARIABLE out_err_var)
set(output_and_error_same ON)
else()
if(DEFINED arg_OUTPUT_VARIABLE)
set(output_variable_param OUTPUT_VARIABLE out_var)
endif()
if(DEFINED arg_ERROR_VARIABLE)
set(error_variable_param ERROR_VARIABLE err_var)
endif()
endif()
vcpkg_execute_in_download_mode(
COMMAND ${arg_COMMAND}
OUTPUT_FILE "${log_out}"
ERROR_FILE "${log_err}"
RESULT_VARIABLE error_code
WORKING_DIRECTORY "${arg_WORKING_DIRECTORY}"
${timeout_param}
${output_variable_param}
${error_variable_param}
)
if(NOT error_code EQUAL 0)
set(stringified_logs "")
foreach(log IN ITEMS "${log_out}" "${log_err}")
if(NOT EXISTS "${log}")
continue()
endif()
file(SIZE "${log}" log_size)
if(NOT log_size EQUAL "0")
file(TO_NATIVE_PATH "${log}" native_log)
string(APPEND stringified_logs " ${native_log}\n")
endif()
endforeach()
z_vcpkg_prettify_command_line(pretty_command ${arg_COMMAND})
message(FATAL_ERROR
" Command failed: ${pretty_command}\n"
" Working Directory: ${arg_WORKING_DIRECTORY}\n"
" Error code: ${error_code}\n"
" See logs for more information:\n"
"${stringified_logs}"
)
endif()
# pass output parameters back to caller's scope
if(output_and_error_same)
z_vcpkg_forward_output_variable(arg_OUTPUT_VARIABLE out_err_var)
# arg_ERROR_VARIABLE = arg_OUTPUT_VARIABLE, so no need to set it again
else()
z_vcpkg_forward_output_variable(arg_OUTPUT_VARIABLE out_var)
z_vcpkg_forward_output_variable(arg_ERROR_VARIABLE err_var)
endif()
endfunction()