TEMP: Use public Win Arm64 runners

Author: dpaoliello

.github/workflows/ci.yml

@@ -134,6 +134,9 @@ jobs:
       - name: show the current environment
         run: src/ci/scripts/dump-environment.sh
 
+      - name: install rust
+        run: src/ci/scripts/install-rust.sh
+
       - name: install awscli
         run: src/ci/scripts/install-awscli.sh
 
@@ -212,8 +215,7 @@ jobs:
           fi
           exit ${STATUS}
         env:
-          AWS_ACCESS_KEY_ID: ${{ env.CACHES_AWS_ACCESS_KEY_ID }}
-          AWS_SECRET_ACCESS_KEY: ${{ secrets[format('AWS_SECRET_ACCESS_KEY_{0}', env.CACHES_AWS_ACCESS_KEY_ID)] }}
+          SCCACHE_S3_NO_CREDENTIALS: 1
 
       - name: create github artifacts
         run: src/ci/scripts/create-doc-artifacts.sh

src/ci/github-actions/jobs.yml

@@ -48,7 +48,7 @@ runners:
     <<: *base-job
 
   - &job-windows-aarch64
-    os: windows-11-arm64-8core-32gb
+    os: windows-11-arm
     <<: *base-job
 
   - &job-aarch64-linux

src/ci/scripts/install-clang.sh

@@ -65,6 +65,10 @@ elif isWindows && ! isKnownToBeMingwBuild; then
     # Disable downloading CI LLVM on this builder;
     # setting up clang-cl just above conflicts with the default if-unchanged option.
     ciCommandSetEnv NO_DOWNLOAD_CI_LLVM 1
+
+    # On Arm64, the Ring crate requires that Clang be on the PATH.
+    # https://github.com/briansmith/ring/blob/main/BUILDING.md
+    ciCommandAddPath "$(cygpath -m "$(pwd)/clang-rust/bin")"
 fi
 
 if isWindows; then

src/ci/scripts/install-mingw.sh

@@ -42,5 +42,5 @@ if isWindows && isKnownToBeMingwBuild; then
 
     curl -o mingw.7z "${MIRRORS_BASE}/${mingw_archive}"
     7z x -y mingw.7z > /dev/null
-    ciCommandAddPath "$(pwd)/${mingw_dir}/bin"
+    ciCommandAddPath "$(cygpath -m "$(pwd)/${mingw_dir}/bin")"
 fi

src/ci/scripts/install-ninja.sh

@@ -12,7 +12,7 @@ if isWindows; then
     7z x -oninja ninja.zip
     rm ninja.zip
     ciCommandSetEnv "RUST_CONFIGURE_ARGS" "${RUST_CONFIGURE_ARGS} --enable-ninja"
-    ciCommandAddPath "$(pwd)/ninja"
+    ciCommandAddPath "$(cygpath -m "$(pwd)/ninja")"
 elif isMacOS; then
     brew install ninja
 fi

src/ci/scripts/install-rust.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+# For mingw builds use a vendored mingw.
+
+set -euo pipefail
+IFS=$'\n\t'
+
+source "$(cd "$(dirname "$0")" && pwd)/../shared.sh"
+
+if isWindows; then
+    case "${CI_JOB_NAME}" in
+        *aarch64*)
+            curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y -q --default-host aarch64-pc-windows-msvc
+            ciCommandAddPath "${USERPROFILE}/.cargo/bin"
+            ;;
+    esac
+fi

src/ci/scripts/install-sccache.sh

@@ -15,7 +15,7 @@ elif isWindows; then
     mkdir -p sccache
     curl -fo sccache/sccache.exe \
       "${MIRRORS_BASE}/2025-02-24-sccache-v0.10.0-x86_64-pc-windows-msvc.exe"
-    ciCommandAddPath "$(pwd)/sccache"
+    ciCommandAddPath "$(cygpath -m "$(pwd)/sccache")"
 fi
 
 # FIXME: we should probably install sccache outside the containers and then