[llvm] df7c577 - Update the Windows packaging script.

[Carlos Alberto Enciso via llvm-commits]

Author: Carlos Alberto Enciso
Date: 2022-07-12T06:37:29+01:00
New Revision: df7c5772a2db6dd7bcf4a89bae4543a8f8984916

URL: https://github.com/llvm/llvm-project/commit/df7c5772a2db6dd7bcf4a89bae4543a8f8984916
DIFF: https://github.com/llvm/llvm-project/commit/df7c5772a2db6dd7bcf4a89bae4543a8f8984916.diff

LOG: Update the Windows packaging script.

As discussed on:
  https://discourse.llvm.org/t/build-llvm-release-bat-script-options/63146/6

Latest 7-zip versions (21.x) require administrator permissions
to create symbolic links.

Check if any of the following conditions is true:
- Version of 7-zip is 20.x or older
- Script is running with administrator permissions

Reviewed By: hans, thieta

Differential Revision: https://reviews.llvm.org/D129263

Added: 
    

Modified: 
    llvm/utils/release/build_llvm_release.bat

Removed: 
    


################################################################################
diff  --git a/llvm/utils/release/build_llvm_release.bat b/llvm/utils/release/build_llvm_release.bat
index e44fc141f92c3..5fa140940e30b 100755
--- a/llvm/utils/release/build_llvm_release.bat
+++ b/llvm/utils/release/build_llvm_release.bat
@@ -1,5 +1,5 @@
 @echo off
-setlocal
+setlocal enabledelayedexpansion
 
 if "%1"=="" goto usage
 goto begin
@@ -16,6 +16,30 @@ exit /b
 
 :begin
 
+REM Note:
+REM   7zip versions 21.x and higher will try to extract the symlinks in
+REM   llvm's git archive, which requires running as administrator.
+
+REM Check 7-zip version and/or administrator permissions.
+for /f "delims=" %%i in ('7z.exe ^| findstr /r "2[1-9].[0-9][0-9]"') do set version=%%i
+if not "%version%"=="" (
+  REM Unique temporary filename to use by the 'mklink' command.
+  set "link_name=%temp%\%username%_%random%_%random%.tmp"
+
+  REM As the 'mklink' requires elevated permissions, the symbolic link
+  REM creation will fail if the script is not running as administrator.
+  mklink /d "!link_name!" . 1>nul 2>nul
+  if errorlevel 1 (
+    echo.
+    echo Script requires administrator permissions, or a 7-zip version 20.x or older.
+    echo Current version is "%version%"
+    exit /b
+  ) else (
+    REM Remove the temporary symbolic link.
+    rd "!link_name!"
+  )
+)
+
 REM Prerequisites:
 REM
 REM   Visual Studio 2019, CMake, Ninja, GNUWin32, SWIG, Python 3,