thodg/libgit2/cmake/Modules/SanitizeBool.cmake

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• Hash : 41b6d30c
  Author :
  Date : 2020-02-24T21:03:11
  

  cmake: sanitize boolean options passed by user
  
  Starting with our conversions to mix backend-autodetection and selection
  into a single variable (USE_GSSAPI, USE_HTTPS, USE_SHA1), we have
  introduced a simple STREQUAL to check for "ON", which indicates that the
  user wants us to auto-detect available backends and pick any one that's
  available. This behaviour deviates from previous behaviour, as passing a
  value like "yes", "on" or "true" will in fact be treated like a backend
  name and result in autodetection failure.
  
  Fix the issue by introducing a new function `SanitizeBool`. Given a
  variable that may hold a boolean value, the function will sanitize that
  variable to hold either "ON" or "OFF". In case it is not a recognized
  boolean, we will just keep the value as-is. This fixes the above
  described issue.
  

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• cmake/Modules/SanitizeBool.cmake

• FUNCTION(SanitizeBool VAR)
  	STRING(TOLOWER "${${VAR}}" VALUE)
  	IF(VALUE STREQUAL "on")
  		SET(${VAR} "ON" PARENT_SCOPE)
  	ELSEIF(VALUE STREQUAL "yes")
  		SET(${VAR} "ON" PARENT_SCOPE)
  	ELSEIF(VALUE STREQUAL "true")
  		SET(${VAR} "ON" PARENT_SCOPE)
  	ELSEIF(VALUE STREQUAL "1")
  		SET(${VAR} "ON" PARENT_SCOPE)
  	ELSEIF(VALUE STREQUAL "off")
  		SET(${VAR} "OFF" PARENT_SCOPE)
  	ELSEIF(VALUE STREQUAL "no")
  		SET(${VAR} "OFF" PARENT_SCOPE)
  	ELSEIF(VALUE STREQUAL "false")
  		SET(${VAR} "OFF" PARENT_SCOPE)
  	ELSEIF(VALUE STREQUAL "0")
  		SET(${VAR} "OFF" PARENT_SCOPE)
  	ENDIF()
  ENDFUNCTION()
  

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