Migrate CI/CD to Github Actions

Signed-off-by: Ben Reedy <breed808@breed808.com>

.github/workflows/ci.yml

@@ -0,0 +1,129 @@
+name: windows_exporter CI/CD
+
+# Trigger on pull requests and releases
+# Deployments will only occur for releases (see `if` clauses in the build job).
+on:
+  pull_request:
+    branches:
+      - master
+  release:
+    types:
+      - published
+      - edited
+
+jobs:
+  test:
+    runs-on: windows-2019
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.17.5'
+
+      - name: Test
+        run: make test
+
+      - name: Install e2e deps
+        run: |
+          go get -u github.com/prometheus/promu@v0.11.1
+          go get -u github.com/josephspurrier/goversioninfo/cmd/goversioninfo@v1.2.0
+          # GOPATH\bin dir must be appended to PATH else the `promu` command won't be found
+          echo "$(go env GOPATH)\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+
+      - name: e2e Test
+        run: make e2e-test
+
+  lint:
+    runs-on: windows-2019
+    steps:
+      # `gofmt` linter run by golangci-lint fails on CRLF line endings (the default for Windows)
+      - name: Set git to use LF
+        run: |
+          git config --global core.autocrlf false
+          git config --global core.eol lf
+
+      - uses: actions/checkout@v2
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.17.5'
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: v1.43
+          args: "--timeout=5m"
+
+      # golangci-lint action doesn't always provide helpful output, so re-run without the action for
+      # better output of the problem.
+      # The cache from the golangci-lint step is re-used here, so this step should finish quickly.
+      - name: errors
+        if: ${{ failure() }}
+        run: golangci-lint run --timeout=5m -c .golangci.yaml
+
+  build:
+    runs-on: windows-2019
+    needs:
+      - test
+      - lint
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          # fetch-depth required for gitversion in `Build` step
+          fetch-depth: 0
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '^1.17.5'
+
+      - name: Install Build deps
+        run: |
+          go get -u github.com/prometheus/promu@v0.11.1
+          go get -u github.com/josephspurrier/goversioninfo/cmd/goversioninfo@v1.2.0
+          # GOPATH\bin dir must be added to PATH else the `promu` and `goversioninfo` commands won't be found
+          echo "$(go env GOPATH)\bin" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append
+
+      - name: Build
+        run: |
+          $ErrorActionPreference = "Stop"
+
+          gitversion /output json /showvariable FullSemVer | Set-Content VERSION -PassThru
+          $Version = Get-Content VERSION
+          # Windows versioninfo resources need the file version by parts (but product version is free text)
+          $VersionParts = ($Version -replace '^v?([0-9\.]+).*$','$1').Split(".")
+          goversioninfo.exe -ver-major $VersionParts[0] -ver-minor $VersionParts[1] -ver-patch $VersionParts[2] -product-version $Version -platform-specific
+
+          make crossbuild
+          # GH requires all files to have different names, so add version/arch to differentiate
+          foreach($Arch in "amd64","386") {
+            Move-Item output\$Arch\windows_exporter.exe output\windows_exporter-$Version-$Arch.exe
+          }
+
+      - name: Upload Artifacts
+        uses: actions/upload-artifact@v2
+        with:
+          name: windows_exporter_binaries
+          path: output\windows_exporter-*.exe
+
+      - name: Build Release Artifacts
+        if: startsWith(github.ref, 'refs/tags/')
+        run: |
+          $ErrorActionPreference = "Stop"
+          $BuildVersion = Get-Content VERSION
+          $TagName = $env:GITHUB_REF -replace 'refs/tags/', ''
+          # The MSI version is not semver compliant, so just take the numerical parts
+          $MSIVersion = $TagName -replace '^v?([0-9\.]+).*$','$1'
+          foreach($Arch in "amd64","386") {
+            Write-Verbose "Building windows_exporter $MSIVersion msi for $Arch"
+            .\installer\build.ps1 -PathToExecutable .\output\windows_exporter-$BuildVersion-$Arch.exe -Version $MSIVersion -Arch "$Arch"
+            Move-Item installer\Output\windows_exporter-$MSIVersion-$Arch.msi output\
+          }
+
+          promu checksum output\
+
+      - name: Release
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          $TagName = $env:GITHUB_REF -replace 'refs/tags/', ''
+          Get-ChildItem -Path output\* -Include @('windows_exporter*.msi', 'windows_exporter*.exe', 'sha256sums.txt') | Foreach-Object {gh release upload $TagName $_}