Change Host to Build and Target to Host

This matches the rest of the workflow's naming convention.

Author: Steelskin

.github/actions/setup-build/action.yml

@@ -15,8 +15,11 @@ inputs:
     default: false
     required: false
     type: boolean
-  target-arch:
-    description: The target architecture, "x86", "amd64" or "arm64". Defaults to the host architecture.
+  host-arch:
+    description: |
+      The compiler's host architecture, "x86", "amd64" or "arm64". Defaults to the build
+      architecture. (a.k.a. the current runner's architecture).
+      This is the target architecture for the Visual Studio Developer Environment.
     required: false
     type: string
 
@@ -35,20 +38,20 @@ runs:
       shell: pwsh
       run: |
         if ($IsWindows) {
-          $HostOS = "windows"
+          $BuildOS = "windows"
         } elseif ($IsMacOS) {
-          $HostOS = "mac"
+          $BuildOS = "macosx"
         } else {
           Write-Output "::error::Unsupported host OS."
           exit 1
         }
 
         $Arch = ([System.Runtime.InteropServices.RuntimeInformation]::OSArchitecture).ToString()
         switch ($Arch) {
-          "X64" { $HostArch = "amd64" }
-          "Arm64" { $HostArch = "arm64" }
+          "X64" { $BuildArch = "amd64" }
+          "Arm64" { $BuildArch = "arm64" }
           default {
-            Write-Output "::error::Unsupported host architecture: `"$HostArch`""
+            Write-Output "::error::Unsupported host architecture: `"$BuildArch`""
             exit 1
           }
         }
@@ -79,32 +82,32 @@ runs:
         }
 
         if ("${{ inputs.setup-vs-dev-env }}" -eq "true") {
-          switch ("${{ inputs.target-arch }}") {
-            "x86" { $TargetArch = "x86" }
-            "amd64" { $TargetArch = "amd64" }
-            "arm64" { $TargetArch = "arm64" }
-            "" { $TargetArch = $HostArch }
+          switch ("${{ inputs.host-arch }}") {
+            "x86" { $HostArch = "x86" }
+            "amd64" { $HostArch = "amd64" }
+            "arm64" { $HostArch = "arm64" }
+            "" { $HostArch = $BuildArch }
             default {
-              Write-Output "::error::Unsupported target architecture: `"${{ inputs.target-arch }}`""
+              Write-Output "::error::Unsupported host architecture: `"${{ inputs.host-arch }}`""
               exit 1
             }
           }
         } else {
-          $TargetArch = $HostArch
+          $HostArch = $BuildArch
         }
 
-        Write-Output "ℹ️ Host OS: $HostOS"
+        Write-Output "ℹ️ Build OS: $BuildOS"
+        Write-Output "ℹ️ Build architecture: $BuildArch"
         Write-Output "ℹ️ Host architecture: $HostArch"
-        Write-Output "ℹ️ Target architecture: $TargetArch"
 
         @"
-        host-os=$HostOS
+        build-os=$BuildOS
+        build-arch=$BuildArch
         host-arch=$HostArch
-        target-arch=$TargetArch
         "@ | Out-File -FilePath $env:GITHUB_OUTPUT -Encoding utf8 -Append
 
     - name: Install Windows SDK version ${{ inputs.windows-sdk-version }}
-      if: steps.sanitize-input.outputs.host-os == 'windows' && inputs.windows-sdk-version != ''
+      if: steps.sanitize-input.outputs.build-os == 'windows' && inputs.windows-sdk-version != ''
       shell: pwsh
       run: |
         $WinSdkVersionString = "${{ inputs.windows-sdk-version }}"
@@ -168,7 +171,7 @@ runs:
         }
 
     - name: Install Windows MSVC version ${{ inputs.msvc-version }}
-      if: steps.sanitize-input.outputs.host-os == 'windows' && inputs.msvc-version != ''
+      if: steps.sanitize-input.outputs.build-os == 'windows' && inputs.msvc-version != ''
       id: setup-msvc
       shell: pwsh
       run: |
@@ -232,10 +235,10 @@ runs:
         }
 
     - name: Setup Visual Studio Developer Environment
-      if: steps.sanitize-input.outputs.host-os == 'windows' && inputs.setup-vs-dev-env == 'true'
+      if: steps.sanitize-input.outputs.build-os == 'windows' && inputs.setup-vs-dev-env == 'true'
       uses: compnerd/gha-setup-vsdevenv@5eb3eae1490d4f7875d574c4973539f69109700d # main
       with:
-        host_arch: ${{ steps.sanitize-input.outputs.host-arch }}
-        arch: ${{ steps.sanitize-input.outputs.target-arch }}
+        host_arch: ${{ steps.sanitize-input.outputs.build-arch }}
+        arch: ${{ steps.sanitize-input.outputs.host-arch }}
         winsdk: ${{ inputs.windows-sdk-version }}
         toolset_version: ${{ inputs.msvc-version }}