Add N-API prebuild for Windows arm64

.github/workflows/ci.yml

@@ -45,6 +45,15 @@ jobs:
       if: ${{ matrix.os == 'ubuntu-16.04' }}
       name: Install additional dependencies
 
+    # This step can be removed as soon as official Windows arm64 builds are published:
+    # https://github.com/nodejs/build/issues/2450#issuecomment-705853342
+    - run: |
+        $NodeVersion = (node --version) -replace '^.'
+        $NodeFallbackVersion = "15.2.1"
+        & .\script\download-node-lib-win-arm64.ps1 $NodeVersion $NodeFallbackVersion
+      if: ${{ matrix.os == 'windows-latest' }}
+      name: Install Windows arm64 node.lib
+
     - run: npm install
       name: Setup environment
 
@@ -68,16 +77,19 @@ jobs:
     - run: npm run prebuild-napi-x64
       name: Prebuild (x64)
 
+    - run: npm run prebuild-napi-arm64
+      name: Prebuild (arm64)
+      if: ${{ matrix.os != 'macos-latest' }}
+
     - run: |
-        npm run prebuild-napi-arm64
         docker build -t node-keytar/i386 docker/i386
         docker run --rm -v ${PWD}:/project node-keytar/i386 /bin/bash -c "cd /project && npm run prebuild-napi-ia32"
       if: ${{ matrix.os == 'ubuntu-16.04' }}
-      name: Prebuild (x86 and arm64)
+      name: Prebuild (Linux x86)
 
     - run: npm run prebuild-napi-ia32
       if: ${{ matrix.os == 'windows-latest' }}
-      name: Prebuild (x86)
+      name: Prebuild (Windows x86)
 
     - run: |
         ls prebuilds/

appveyor.yml

@@ -24,6 +24,11 @@ build_script:
   - npm test
   - npm run prebuild-napi-x64
   - npm run prebuild-napi-ia32
+  - ps: >-
+      $NodeVersion = (node --version) -replace '^.'
+      $NodeFallbackVersion = "15.2.1"
+      & .\script\download-node-lib-win-arm64.ps1 $NodeVersion $NodeFallbackVersion
+      npm run prebuild-napi-arm64
   - if defined APPVEYOR_REPO_TAG_NAME (npm run upload)
 
 test: off

script/download-node-lib-win-arm64.ps1

@@ -0,0 +1,36 @@
+# This script can be removed as soon as official Windows arm64 builds are published:
+# https://github.com/nodejs/build/issues/2450#issuecomment-705853342
+
+$nodeVersion = $args[0]
+$fallbackVersion = $args[1]
+
+If ($null -eq $nodeVersion -Or $null -eq $fallbackVersion) {
+  Write-Error "No NodeJS version given as argument to this file. Run it like download-nodejs-win-arm64.ps1 NODE_VERSION NODE_FALLBACK_VERSION"
+  exit 1
+}
+
+$url = "https://unofficial-builds.nodejs.org/download/release/v$nodeVersion/win-arm64/node.lib"
+$fallbackUrl = "https://unofficial-builds.nodejs.org/download/release/v$fallbackVersion/win-arm64/node.lib"
+
+# Always write to the $nodeVersion cache folder, even if we're using the fallbackVersion
+$cacheFolder = "$env:LOCALAPPDATA\Temp\prebuild\napi\$nodeVersion\arm64"
+
+If (!(Test-Path $cacheFolder)) {
+  New-Item -ItemType Directory -Force -Path $cacheFolder
+}
+
+$output = "$cacheFolder\node.lib"
+$start_time = Get-Date
+
+try {
+  Invoke-WebRequest -Uri $url -OutFile $output
+  $downloadedNodeVersion = $nodeVersion
+} catch {
+  if ($_.Exception.Response -And $_.Exception.Response.StatusCode -eq "NotFound") {
+    Write-Output "No arm64 node.lib found for Node Windows $nodeVersion, trying fallback version $fallbackVersion..."
+    Invoke-WebRequest -Uri $fallbackUrl -OutFile $output
+    $downloadedNodeVersion = $fallbackVersion
+  }
+}
+
+Write-Output "Downloaded arm64 NodeJS lib v$downloadedNodeVersion to $output in $((Get-Date).Subtract($start_time).Seconds) second(s)"