Ensure ssh-agent is started

.github/workflows/build.yml

@@ -26,16 +26,42 @@ jobs:
 
     steps:
     - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+
+    - name: Setup gpg-agent
+      run: |
+        gpg-agent --daemon || true
+
+    # The default version of openssh on windows server is quite old (8.1) and doesn't have
+    # all the necessary signing/verification commands available
+    - name: Setup ssh-agent [windows]
+      if: ${{ matrix.os == 'windows-latest' }}
+      run: |
+        Remove-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0
+        Remove-WindowsCapability -Online -Name OpenSSH.Client~~~~0.0.1.0
+        choco install openssh --pre
+
+        $sshAgentOutput = ssh-agent -s | Out-String
+
+        if ($sshAgentOutput -match 'SSH_AUTH_SOCK=(.+?); export SSH_AUTH_SOCK;') {
+            "SSH_AUTH_SOCK=$($matches[1])" | Out-File -Append -FilePath $env:GITHUB_ENV -Encoding utf8
+        }
+        if ($sshAgentOutput -match 'SSH_AGENT_PID=([0-9]+); export SSH_AGENT_PID;') {
+            "SSH_AGENT_PID=$($matches[1])" | Out-File -Append -FilePath $env:GITHUB_ENV -Encoding utf8
+        }
+
+    - name: Setup ssh-agent [unix]
+      if: ${{ matrix.os != 'windows-latest' }}
+      run: |
+        eval "$(ssh-agent -s)"
+        echo "SSH_AUTH_SOCK=$SSH_AUTH_SOCK" >> "$GITHUB_ENV"
+        echo "SSH_AGENT_PID=$SSH_AGENT_PID" >> "$GITHUB_ENV"
+
     - name: Install Rust
       uses: dtolnay/rust-toolchain@1482605bfc5719782e1267fd0c0cc350fe7646b8
       with:
         toolchain:  1.71
     - name: Build
       run: cargo build --workspace --all-targets --verbose ${{ matrix.cargo_flags }}
-    - name: Start Signing Agents
-      run: |
-        source <(gpg-agent --daemon)
-        eval `ssh-agent -s`
     - name: Test
       run: cargo test --workspace --all-targets --verbose ${{ matrix.cargo_flags }}
       env: