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CMake/Modules/CMakeFindJavaCommon.cmake
Seth R Johnson 3acbe073ba FindJava: improve failure/verbosity when 'java -version' fails
On macOS monterey, `java -version` returns
```
The operation couldn’t be completed. Unable to locate a Java Runtime.
Please visit http://www.java.com for information on installing Java.

```
which does not match the existing regex. Instead of hitting a fatal error if required,
reset the variable and let FindPackage handle the result.

If `QUIET` is requested, don't print anything if the version query fails. Otherwise, print the message.

Additionally, clean up temporary variables set by the execute_process commands.
2022-05-31 07:34:49 -04:00

35 lines
1.0 KiB
CMake

# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
# Do not include this module directly from code outside CMake!
set(_JAVA_HOME "")
if(JAVA_HOME AND IS_DIRECTORY "${JAVA_HOME}")
set(_JAVA_HOME "${JAVA_HOME}")
set(_JAVA_HOME_EXPLICIT 1)
else()
set(_ENV_JAVA_HOME "")
if(DEFINED ENV{JAVA_HOME})
file(TO_CMAKE_PATH "$ENV{JAVA_HOME}" _ENV_JAVA_HOME)
endif()
if(_ENV_JAVA_HOME AND IS_DIRECTORY "${_ENV_JAVA_HOME}")
set(_JAVA_HOME "${_ENV_JAVA_HOME}")
set(_JAVA_HOME_EXPLICIT 1)
else()
set(_CMD_JAVA_HOME "")
if(APPLE AND EXISTS /usr/libexec/java_home)
execute_process(COMMAND /usr/libexec/java_home
OUTPUT_VARIABLE _CMD_JAVA_HOME
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
)
endif()
if(_CMD_JAVA_HOME AND IS_DIRECTORY "${_CMD_JAVA_HOME}")
set(_JAVA_HOME "${_CMD_JAVA_HOME}")
set(_JAVA_HOME_EXPLICIT 0)
endif()
unset(_CMD_JAVA_HOME)
endif()
unset(_ENV_JAVA_HOME)
endif()