External 3rdparty dir

CMake/Fetch3rdPartyInBuild.cmake

 #This file depends on being in open-vds/CMake directory
-set(Fetch3rdPartyDir ${CMAKE_CURRENT_LIST_DIR})
+set(Fetch3rdPartyDirInternal "${CMAKE_CURRENT_LIST_DIR}")
 
 macro(Fetch3rdParty_File name dir_prefix version ext url url_hash)
-  get_filename_component(thirdParty "${Fetch3rdPartyDir}/../3rdparty/${dir_prefix}" ABSOLUTE)
+  message("OPENVDS_3RD_PARTY_DIR ${OPENVDS_3RD_PARTY_DIR}")
+  if (OPENVDS_3RD_PARTY_DIR)
+    set(Fetch3rdPartyDir "${OPENVDS_3RD_PARTY_DIR}")
+  else()
+    set(Fetch3rdPartyDir "${Fetch3rdPartyDirInternal}/../3rdparty")
+  endif()
+  get_filename_component(thirdParty "${Fetch3rdPartyDir}/${dir_prefix}" ABSOLUTE)
   file(MAKE_DIRECTORY ${thirdParty})
   set(SRC_FILE ${thirdParty}/${name}-${version}.${ext})
   set(${name}_SOURCE_FILE ${SRC_FILE} PARENT_SCOPE)
@@ -17,11 +23,16 @@ macro(Fetch3rdParty_File name dir_prefix version ext url url_hash)
 endmacro()
 
 macro(Fetch3rdParty_FileTarget name dir_prefix dest version url url_hash)
-  get_filename_component(thirdParty "${Fetch3rdPartyDir}/../3rdparty/${name}-${version}/${dir_prefix}" ABSOLUTE)
+  if (OPENVDS_3RD_PARTY_DIR)
+    set(Fetch3rdPartyDir "${OPENVDS_3RD_PARTY_DIR}")
+  else()
+    set(Fetch3rdPartyDir "${Fetch3rdPartyDirInternal}/../3rdparty")
+  endif()
+  get_filename_component(thirdParty "${Fetch3rdPartyDir}/${name}-${version}/${dir_prefix}" ABSOLUTE)
   file(MAKE_DIRECTORY ${thirdParty})
   set(DEST_FILE ${thirdParty}/${dest})
   set(${name}_SOURCE_FILE ${DEST_FILE} PARENT_SCOPE)
-  set(${name}_SOURCE_DIR  ${Fetch3rdPartyDir}/../3rdparty/${name}-${version} PARENT_SCOPE)
+  set(${name}_SOURCE_DIR  ${Fetch3rdPartyDir}/${name}-${version} PARENT_SCOPE)
   set(${name}_VERSION ${version} PARENT_SCOPE)
   if (NOT (EXISTS ${DEST_FILE}))
     file(DOWNLOAD ${url}
@@ -34,7 +45,12 @@ macro(Fetch3rdParty_FileTarget name dir_prefix dest version url url_hash)
 endmacro()
 
 macro(Fetch3rdParty_Package name version url url_hash)
-    get_filename_component(thirdParty "${Fetch3rdPartyDir}/../3rdparty" ABSOLUTE)
+  if (OPENVDS_3RD_PARTY_DIR)
+    set(Fetch3rdPartyDir "${OPENVDS_3RD_PARTY_DIR}")
+  else()
+    set(Fetch3rdPartyDir "${Fetch3rdPartyDirInternal}/../3rdparty")
+  endif()
+    get_filename_component(thirdParty "${Fetch3rdPartyDir}" ABSOLUTE)
     set(SRC_DIR ${thirdParty}/${name}-${version})
     set(${name}_SOURCE_DIR ${SRC_DIR} PARENT_SCOPE)
     set(${name}_VERSION ${version} PARENT_SCOPE)
@@ -63,13 +79,13 @@ function(Fetch3rdParty)
   Fetch3rdParty_Package(curl              7.68.0     https://github.com/curl/curl/releases/download/curl-7_68_0/curl-7.68.0.tar.gz        SHA256=1dd7604e418b0b9a9077f62f763f6684c1b092a7bc17e3f354b8ad5c964d7358)
   Fetch3rdParty_Package(libuv             1.34.1     https://github.com/libuv/libuv/archive/v1.34.1.tar.gz                                SHA256=e3e0105c9b26e181e0547607cb6893462beb0c652674c3795766b2e5555288b3)
   Fetch3rdParty_Package(zlib              1.2.11     http://zlib.net/zlib-1.2.11.tar.gz                                                   SHA256=c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1)
-  Fetch3rdParty_Package(libressl          3.1.3      https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.1.3.tar.gz                   SHA256=c76b0316acf612ecb62f5cb014a20d972a663bd9e40abf952a86f3b998b69fa0) 
+  Fetch3rdParty_Package(libressl          3.1.3      https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.1.3.tar.gz                   SHA256=c76b0316acf612ecb62f5cb014a20d972a663bd9e40abf952a86f3b998b69fa0)
   Fetch3rdParty_Package(absl              20200225.2 https://codeload.github.com/abseil/abseil-cpp/tar.gz/20200225.2                      SHA256=f41868f7a938605c92936230081175d1eae87f6ea2c248f41077c8f88316f111)
   Fetch3rdParty_Package(crc32c            1.1.1      https://codeload.github.com/google/crc32c/tar.gz/1.1.1                               SHA256=a6533f45b1670b5d59b38a514d82b09c6fb70cc1050467220216335e873074e8)
   Fetch3rdParty_Package(google-cloud-cpp  1.14.0     https://codeload.github.com/googleapis/google-cloud-cpp/tar.gz/v1.14.0               SHA256=839b2d4dcb36a671734dac6b30ea8c298bbeaafcf7a45ee4a7d7aa5986b16569)
-  Fetch3rdParty_File(testng  java         6.14.3 jar https://repo1.maven.org/maven2/org/testng/testng/6.14.3/testng-6.14.3.jar            MD5=9f17a8f9e99165e148c42b21f4b63d7c) 
-  Fetch3rdParty_File(jcommander java      1.72 jar   https://repo1.maven.org/maven2/com/beust/jcommander/1.72/jcommander-1.72.jar         MD5=9fde6bc0ba1032eceb7267fd1ad1657b) 
+  Fetch3rdParty_File(testng  java         6.14.3 jar https://repo1.maven.org/maven2/org/testng/testng/6.14.3/testng-6.14.3.jar            MD5=9f17a8f9e99165e148c42b21f4b63d7c)
+  Fetch3rdParty_File(jcommander java      1.72 jar   https://repo1.maven.org/maven2/com/beust/jcommander/1.72/jcommander-1.72.jar         MD5=9fde6bc0ba1032eceb7267fd1ad1657b)
   Fetch3rdParty_FileTarget(google_nlohmann google/cloud/storage/internal nlohmann_json.hpp 3.4.0  https://raw.githubusercontent.com/nlohmann/json/v3.4.0/single_include/nlohmann/json.hpp MD5=27f3760c1d3a0fff7d8a2407d8db8f9d)
-  
+
 endfunction()
 

CMakeLists.txt

@@ -18,6 +18,8 @@ set (TEST_CONNECTION "" CACHE STRING "Test connection string for OpenOptions")
 set (OPENVDS_LIBDIR_SUFFIX "" CACHE STRING "Suffix to add to lib directories on linux")
 set (OPENVDS_PYTHON_VERSION "" CACHE STRING "Exact Python 3 version to discover")
 set (OPENVDS_JAVA_VERSION "" CACHE STRING "Exact Java version to discover")
+set (OPENVDS_3RD_PARTY_DIR "" CACHE PATH "Path to put 3rd party source code, should be absolute path")
+
 option(FORCE_NO_LIBDIR_SUFFIX "Force there to be no suffix on lib directories linux")
 
 get_property(LIB64 GLOBAL PROPERTY FIND_LIBRARY_USE_LIB64_PATHS)