Add CI checks for Go code. (#17066)

Co-authored-by: Ilya Mashchenko <ilya@netdata.cloud>

2 files changed, 163 insertions, 0 deletions

diff --git a/.github/scripts/get-go-version.py b/.github/scripts/get-go-version.py
new file mode 100755
index 0000000000..105c537c8c
--- /dev/null
+++ b/.github/scripts/get-go-version.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+
+import json
+import os
+import pathlib
+
+from packaging.version import parse
+
+SCRIPT_PATH = pathlib.Path(__file__).parents[0]
+REPO_ROOT = SCRIPT_PATH.parents[1]
+GO_SRC = REPO_ROOT / 'src' / 'go'
+
+GITHUB_OUTPUT = pathlib.Path(os.environ['GITHUB_OUTPUT'])
+
+version = parse('1.0.0')
+modules = []
+
+for modfile in GO_SRC.glob('**/go.mod'):
+    moddata = modfile.read_text()
+
+    for line in moddata.splitlines():
+        if line.startswith('go '):
+            version = max(version, parse(line.split()[1]))
+            break
+
+    for main in modfile.parent.glob('**/main.go'):
+        mainpath = main.relative_to(modfile.parent).parent
+
+        if 'examples' in mainpath.parts:
+            continue
+
+        modules.append({
+            'module': str(modfile.parent),
+            'version': str(version),
+            'build_target': f'github.com/netdata/netdata/go/{ modfile.parts[-2] }/{ str(mainpath) }/',
+        })
+
+with GITHUB_OUTPUT.open('a') as f:
+    f.write(f'matrix={ json.dumps({"include": modules}) }\n')
diff --git a/.github/workflows/go-tests.yml b/.github/workflows/go-tests.yml
new file mode 100644
index 0000000000..531c290ae9
--- /dev/null
+++ b/.github/workflows/go-tests.yml
@@ -0,0 +1,124 @@
+---
+# Ci code for building release artifacts.
+name: Go Tests
+on:
+  push: # Master branch checks only validate the build and generate artifacts for testing.
+    branches:
+      - master
+  pull_request: null # PR checks only validate the build and generate artifacts for testing.
+concurrency: # This keeps multiple instances of the job from running concurrently for the same ref and event type.
+  group: go-test-${{ github.ref }}-${{ github.event_name }}
+  cancel-in-progress: true
+jobs:
+  file-check: # Check what files changed if we’re being run in a PR or on a push.
+    name: Check Modified Files
+    runs-on: ubuntu-latest
+    outputs:
+      run: ${{ steps.check-run.outputs.run }}
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          submodules: recursive
+      - name: Check files
+        id: check-files
+        uses: tj-actions/changed-files@v42
+        with:
+          since_last_remote_commit: ${{ github.event_name != 'pull_request' }}
+          files: |
+            **/*.cmake
+            CMakeLists.txt
+            .github/workflows/go-tests.yml
+            packaging/cmake/
+            src/go/**
+          files_ignore: |
+            **/*.md
+            src/go/**/metadata.yaml
+      - name: List all changed files in pattern
+        continue-on-error: true
+        env:
+          ALL_CHANGED_FILES: ${{ steps.check-files.outputs.all_changed_files }}
+        run: |
+          for file in ${ALL_CHANGED_FILES}; do
+            echo "$file was changed"
+          done
+      - name: Check Run
+        id: check-run
+        run: |
+          if [ "${{ steps.check-files.outputs.any_modified }}" == "true" ] || [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
+            echo 'run=true' >> "${GITHUB_OUTPUT}"
+          else
+            echo 'run=false' >> "${GITHUB_OUTPUT}"
+          fi
+
+  matrix:
+    name: Generate Build Matrix
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.get-version.outputs.matrix }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install dependencies
+        run: sudo apt-get update && sudo apt-get upgrade -y && sudo apt-get install -y python3-packaging
+      - name: Get Go version and modules
+        id: get-version
+        run: .github/scripts/get-go-version.py
+
+  tests:
+    name: Go toolchain tests
+    runs-on: ubuntu-latest
+    needs:
+      - file-check
+      - matrix
+    strategy:
+      fail-fast: false
+      matrix: ${{ fromJson(needs.matrix.outputs.matrix) }}
+    steps:
+      - name: Skip Check
+        id: skip
+        if: needs.file-check.outputs.run != 'true'
+        run: echo "SKIPPED"
+      - name: Install Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.version }}
+      - name: Checkout
+        if: needs.file-check.outputs.run == 'true'
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Go mod download
+        if: needs.file-check.outputs.run == 'true'
+        run: go mod download
+        working-directory: ${{ matrix.module }}
+      - name: Compile
+        if: needs.file-check.outputs.run == 'true'
+        run: |
+          CGO_ENABLED=0 go build -o /tmp/go-test-build ${{ matrix.build_target }}
+          /tmp/go-test-build --help || true
+        working-directory: ${{ matrix.module }}
+      - name: Go fmt
+        if: needs.file-check.outputs.run == 'true'
+        run: |
+          go fmt ./... | tee modified-files
+          [ "$(wc -l modified-files | cut -f 1 -d ' ')" -eq 0 ] || exit 1
+        working-directory: ${{ matrix.module }}
+      - name: Go vet
+        if: needs.file-check.outputs.run == 'true'
+        run: go vet ./...
+        working-directory: ${{ matrix.module }}
+      - name: Set up gotestfmt
+        if: needs.file-check.outputs.run == 'true'
+        uses: GoTestTools/gotestfmt-action@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          version: v2.0.0
+      - name: Go test
+        if: needs.file-check.outputs.run == 'true'
+        run: |
+          set -euo pipefail
+          go test -json ./... -race -count=1 2>&1 | gotestfmt -hide all
+        working-directory: ${{ matrix.module }}