Merge branch 'js/gitlab-ci-windows-rust' into jch

The Windows GitLab CI job has been updated to provision and use the
GNU Rust toolchain for MinGW builds, fixing job failures caused by
incomplete Rust setup and missing linker support.

* js/gitlab-ci-windows-rust:
  ci(gitlab,windows): provide GNU Rust's host-linker support
  ci(gitlab,windows): fix Rust setup for GitLab's MinGW build
  ci(gitlab,windows): preserve exclusions during dependency setup
  ci(gitlab,windows): provision GNU Rust for SDK-based MinGW builds

.gitlab-ci.yml

@@ -133,8 +133,11 @@ build:mingw64:
   before_script:
     - *windows_before_script
     - ./ci/install-sdk.ps1 -directory "git-sdk"
+    - ./ci/install-dependencies.ps1 -Mingw
   script:
-    - git-sdk/usr/bin/bash.exe -l -c 'ci/make-test-artifacts.sh artifacts'
+    # The minimal SDK's profile resets PATH.
+    - git-sdk/usr/bin/bash.exe -l -c
+        'PATH=$PATH:/c/Rust/bin ci/make-test-artifacts.sh artifacts'
   artifacts:
     paths:
       - artifacts

ci/install-dependencies.ps1

@@ -1,5 +1,6 @@
 param(
-    [string]$DownloadDirectory = '.dependencies'
+    [string]$DownloadDirectory = '.dependencies',
+    [switch]$Mingw
 )
 
 $ErrorActionPreference = 'Stop'
@@ -11,7 +12,9 @@ $RustVersion = '1.96.0'
 
 New-Item -Path $DownloadDirectory -ItemType Directory -Force | Out-Null
 New-Item -Path .git/info -ItemType Directory -Force | Out-Null
-New-Item -Path .git/info/exclude -ItemType File -Force | Out-Null
+if (-not (Test-Path .git/info/exclude)) {
+    New-Item -Path .git/info/exclude -ItemType File | Out-Null
+}
 Add-Content -Path .git/info/exclude -Value "/$DownloadDirectory"
 
 function Get-Installer {
@@ -41,6 +44,17 @@ function Invoke-Installer {
     }
 }
 
+$rustTarget = if ($Mingw) { 'gnu' } else { 'msvc' }
+$rustMsi = Get-Installer "rust-$rustTarget.msi" (
+    "https://static.rust-lang.org/dist/" +
+    "rust-$RustVersion-x86_64-pc-windows-$rustTarget.msi")
+Invoke-Installer msiexec.exe @('/i', $rustMsi, 'INSTALLDIR=C:\Rust',
+    "ADDLOCAL=Rustc,Cargo,Std$(if ($Mingw) { ',Gcc' })", '/quiet', '/norestart')
+
+if ($Mingw) {
+    return
+}
+
 $gitAssetVersion = $GitVersion -replace '\.windows\.\d+$', ''
 $gitInstaller = Get-Installer "Git-Installer.exe" `
     "https://github.com/git-for-windows/git/releases/download/v$GitVersion/PortableGit-$gitAssetVersion-64-bit.7z.exe"
@@ -49,7 +63,3 @@ Invoke-Installer $gitInstaller @('-y', '-o"C:\Program Files\Git"')
 $mesonMsi = Get-Installer "meson.msi" `
     "https://github.com/mesonbuild/meson/releases/download/$MesonVersion/meson-$MesonVersion-64.msi"
 Invoke-Installer msiexec.exe @('/i', $mesonMsi, 'INSTALLDIR=C:\Meson', '/quiet', '/norestart')
-
-$rustMsi = Get-Installer "rust.msi" `
-    "https://static.rust-lang.org/dist/rust-$RustVersion-x86_64-pc-windows-msvc.msi"
-Invoke-Installer msiexec.exe @('/i', $rustMsi, 'INSTALLDIR=C:\Rust', 'ADDLOCAL=Rustc,Cargo,Std', '/quiet', '/norestart')