vcpkg/docs/maintainers/vcpkg_execute_required_process.md
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[(z_)vcpkg_prettify_command(_line)] Scripts Tree Audit (#16130)
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2021-02-09 15:53:36 -08:00

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# 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)
## Source
[scripts/cmake/vcpkg_execute_required_process.cmake](https://github.com/Microsoft/vcpkg/blob/master/scripts/cmake/vcpkg_execute_required_process.cmake)