clang-format vs plugin: set version number from cmake (PR20307)

Previously it was hard-coded to 1.0, which meant the installer would
not install the plugin over previous versions.

This commit makes us use LLVM's major.minor.patch version from cmake,
or whatever CLANG_FORMAT_VS_VERSION is set to when configuring the build.

It's pretty dirty to update a configuration file in the source directory
from the cmake build like this. However, the plugin build is already
dirty in this regard since it builds in the source dir when visual studio,
and then copies out the resulting vsix.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213584 91177308-0d34-0410-b5e6-96231b3b80d8

tools/clang-format-vs/CMakeLists.txt

@@ -6,9 +6,16 @@ if (BUILD_CLANG_FORMAT_VS_PLUGIN)
       "${CMAKE_CURRENT_SOURCE_DIR}/ClangFormat/clang-format.exe"
       DEPENDS clang-format)
 
+  if (NOT CLANG_FORMAT_VS_VERSION)
+    set(CLANG_FORMAT_VS_VERSION "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}")
+  endif()
+
+  configure_file("source.extension.vsixmanifest.in"
+      "${CMAKE_CURRENT_SOURCE_DIR}/ClangFormat/source.extension.vsixmanifest")
+
   add_custom_target(clang_format_vsix ALL
       devenv "${CMAKE_CURRENT_SOURCE_DIR}/ClangFormat.sln" /Build Release
-      DEPENDS clang_format_exe_for_vsix
+      DEPENDS clang_format_exe_for_vsix "${CMAKE_CURRENT_SOURCE_DIR}/ClangFormat/source.extension.vsixmanifest"
       COMMAND ${CMAKE_COMMAND} -E copy_if_different
       "${CMAKE_CURRENT_SOURCE_DIR}/ClangFormat/bin/Release/ClangFormat.vsix"
       "${LLVM_TOOLS_BINARY_DIR}/${CMAKE_CFG_INTDIR}/ClangFormat.vsix"

tools/clang-format-vs/ClangFormat/source.extension.vsixmanifest → tools/clang-format-vs/source.extension.vsixmanifest.in

 <?xml version="1.0" encoding="utf-8"?>
-<Vsix Version="1.0.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2010">
+<Vsix Version="1.0" xmlns="http://schemas.microsoft.com/developer/vsx-schema/2010">
   <Identifier Id="20dbc914-1c7a-4992-b236-ef58b37850eb">
     <Name>ClangFormat</Name>
     <Author>LLVM</Author>
-    <Version>1.0</Version>
-    <Description xml:space="preserve">Information about my package</Description>
+    <Version>@CLANG_FORMAT_VS_VERSION@</Version>
+    <Description xml:space="preserve">A tool to format C/C++/Obj-C code.</Description>
     <Locale>1033</Locale>
     <InstalledByMsi>false</InstalledByMsi>
     <SupportedProducts>