📜 Changelog

• Fixed bugs:
  • Fixed is_trivial to correctly handle unusual types.
• Code cleanups:
  • Removed compiler bug workarounds.
• Infrastructure improvements:
  • Updated dependencies.
    • Updated build compiler to VS 2022 17.10 Preview 3.
    • Updated Python to 3.12.3.

💡 Non-Changelog Overview

• This fixes our scripts for preparing 1ES Hosted Pools (after create-1es-hosted-pool.ps1: Avoid ConvertTo-SecureString #4535 broke them), and massively overhauls/simplifies them (also getting rid of the weird "run as admin" dance).
• The resulting pools should require slightly less storage because we're now cleaning up installer executables after running them, and not installing Python docs.
• To meet new security requirements, I'm dropping our use of pip to install psutil, which gives up our ability to have per-test timeouts, but we weren't relying on them anyways (and I don't use them locally). We still have overall timeouts enforced by Azure Pipelines.

⚙️ Commits

• Drop the PsExec dance, but keep the PowerShell 7.4.1 upgrade.
  • The PsExec "switching to AdminUser" machinery was introduced back in Add scripts to generate new Virtual Machine Scale Sets and images for build machines #633 but is no longer necessary (perhaps due to changes in Azure itself, Azure PowerShell, or our scripts). We can run our installers with whatever user Invoke-AzVMRunCommand gives us, and everything works.
  • For now, I've retained the "download modern PowerShell and invoke ourselves to upgrade it" machinery. This isn't actually necessary (the entire script could run as old PowerShell) and removing it would simplify things. However, modern PowerShell has lots of conveniences, and we might want to use them in the future even if the beginning of the script has to remain old-compatible. I think the way that I've structured this is easier to understand than the old dance, but I could be persuaded to drop it entirely.
• Add exit to improve the transcript.
  • This eliminates weird lines:

    PS>$global:?
    True
    

• We don't need the PowerShell call operator when invoking curl.exe.
  • This was the only affected invocation.
• Cleanup the transcript and all downloaded files.
  • This should make the VM image slightly smaller.
• Extract Python args.
  • This is a step towards unification in a later commit.
• Wrap Python installation in try-catch.
  • Ditto.
• For Python, use /quiet instead of /passive, and don't install docs.
  • This should save 50 MB.
  • See Using Python on Windows:
    • /quiet means "to install/uninstall without displaying any UI"
    • /passive means "to display progress without requiring user interaction"
• Move $ProgressPreference to the top, drop duplicate $ErrorActionPreference.
• We can directly invoke pwsh, no need for a transcript.
• Dramatically simplify code with Get-SecureRandom.
  • This uses the exact same System.Security.Cryptography.RandomNumberGenerator machinery. See Get-SecureRandom docs.
  • It was added in PowerShell 7.4, released 2023-11-16. See What's New in PowerShell 7.4.
• Suppress breaking change warnings from Update-AzConfig itself.
  • I had removed this environment variable technique in Toolset update: VS 2022 17.6 Preview 3 #3651, saying "The previous method stopped working.", but it clearly works here now. Let's keep both.
• Simply inline PrintMsiExitCodeMessage.
• Simplify script output.
• Directly invoke the VS installer without cmd.exe /c.
  • I'm not sure why this technique was being used, but it was unnecessary.
• Grand unified DownloadAndInstall.
  • This significantly simplifies the script by invoking our installers in a uniform manner.
• Always disable positional binding, make all parameters mandatory.
  • This is a modern convention.
• Fix VSO-1784520 by dropping psutil and --timeout=240.
  • Without psutil, attempting to use --timeout emits:

    stl-lit.py: D:\GitHub\STL\llvm-project\llvm\utils\lit\lit\main.py:72: note: The test suite configuration requested an individual test timeout of 0 seconds but a timeout of 240 seconds was requested on the command line. Forcing timeout to be 240 seconds.
    stl-lit.py: D:\GitHub\STL\llvm-project\llvm\utils\lit\lit\LitConfig.py:129: fatal: Setting a timeout per test not supported. Requires the Python psutil module but it could not be found. Try installing it via pip or via your operating system's package manager.
    

• Simplify output.
• Python 3.12.3.
• New-AzGalleryImageVersion needs -SourceImageVMId in Azure PowerShell 11.5.0.
• VS 2022 17.10 Preview 3.
• Print whether pool creation was successful.
  • I've seen this script appear to succeed, except that the pool isn't actually created (e.g. due to core quota limitations). This can waste a bunch of time, if I create a PR and then have to investigate why it isn't working. I'm not sure why we aren't getting a failure from New-AzResource (and investigating by running the script is extremely time-consuming), but it's simple to add a final check that the pool resource exists - if it doesn't, then we're definitely doomed.
• Style: } else {
• New pool.
• Remove _VCRT_EXPORT_STD workarounds.
  • std.ixx was explicitly including <yvals_core.h> for the workaround, which is no longer necessary.
• Remove workaround for VSO-1975579 "Standard Library Modules: fatal error C1116: unrecoverable error importing module 'std'. Specialization of 'std::invoke_result_t' with arguments '_Fn, _Ty...'".
• Fix DevCom-1586179 VSO-1439353 by removing workarounds for VSO-119526 (fixed) and LLVM-41915 (still active).
  • VSO-119526 "Multiple versions of special member function should be allowed" was fixed after 11 years.
  • LLVM-41915 "Implement CWG-1496" is still active, but implementing is_trivial with __is_trivially_constructible(_Ty) && __is_trivially_copyable(_Ty) isn't a transparent workaround - it causes DevCom-1586179 VSO-1439353 "std::is_trivial incorrectly fails because of protected defaulted default constructor". Let's just use the dedicated compiler builtin, and blame the compiler if it goes wrong - we've moved away from attempting to compensate for compiler deficiencies in type traits.
• Fix test: ranges::dangling is non-trivial (properly detected by Clang), but (portably) trivially default constructible.