Add CI testing workflow (#9)

## 💸 TL;DR
Add a CI test workflow
* Build binary.
* Run tests.
* Set minimum Go version to 1.21.
* Cleanup Go module requirements/indirect sections.

Signed-off-by: SuperQ <[email protected]>

.github/workflows/ci.yml

@@ -0,0 +1,31 @@
+name: Build
+
+on:
+  - pull_request
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        go:
+          - "1.21"
+          - "1.22"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+      - name: install Go
+        uses: actions/setup-go@0c52d547c9bc32b1aa3301fd7a9cb496313a4491 # v5.0.0
+        with:
+          go-version: ${{ matrix.go }}
+      - name: Build
+        run: make build
+      - name: Test
+        run: make test-unit

Makefile

@@ -1,5 +1,7 @@
 .PHONY: test build install lint clean fmt processbin
 
+CGO_ENABLED ?= 0
+
 BRANCH    ?= $(shell git rev-parse --abbrev-ref HEAD)
 BUILDDATE ?= $(shell date +"%Y-%m-%dT%H:%M:%S%z")
 REVISION  ?= $(shell git rev-parse HEAD)
@@ -18,19 +20,19 @@ test-ci: processbin
 	go test -race ./... -count=30
 
 test-unit: processbin
-	go test -short -timeout 15s ./...
+	CGO_ENABLED=$(CGO_ENABLED) go test -short -timeout 15s ./...
 
 processbin:
-	go build  -o dist/processbin ./cmd/processbin
+	CGO_ENABLED=$(CGO_ENABLED) go build  -o dist/processbin ./cmd/processbin
 
 build:
-	go build -ldflags "$(VERSION_LDFLAGS)" -o dist/monoceros ./cmd/monoceros
+	CGO_ENABLED=$(CGO_ENABLED) go build -ldflags "$(VERSION_LDFLAGS)" -o dist/monoceros ./cmd/monoceros
 
 build-race:
-	go build -race -ldflags "$(VERSION_LDFLAGS)" -o dist/monoceros-race ./cmd/monoceros
+	CGO_ENABLED=$(CGO_ENABLED) go build -race -ldflags "$(VERSION_LDFLAGS)" -o dist/monoceros-race ./cmd/monoceros
 
 install:
-	go install -ldflags "$(VERSION_LDFLAGS)" ./cmd/monoceros
+	CGO_ENABLED=$(CGO_ENABLED) go install -ldflags "$(VERSION_LDFLAGS)" ./cmd/monoceros
 
 lint:
 	go mod tidy

cmd/monoceros/main.go

@@ -4,12 +4,10 @@ package main
 import (
 	"context"
 	"fmt"
-	"math/rand"
 	"os"
 	"os/signal"
 	"sync"
 	"syscall"
-	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/common/version"
@@ -97,7 +95,6 @@ func mainCore(config *config.MonocerosConfig, logger *zap.Logger) error {
 
 func main() {
 	prometheus.MustRegister(version.NewCollector(AppName))
-	rand.Seed(time.Now().UnixNano())
 
 	app := &cli.App{
 		Name:        AppName,

go.mod

@@ -1,20 +1,16 @@
 module github.com/reddit/monoceros
 
-go 1.19
+go 1.21
 
 require (
 	github.com/go-cmd/cmd v1.4.2
-	github.com/stretchr/testify v1.8.0 // indirect
-	go.uber.org/zap v1.21.0
-	gopkg.in/yaml.v3 v3.0.1
-)
-
-require (
 	github.com/google/go-cmp v0.6.0
 	github.com/prometheus/client_golang v1.13.0
 	github.com/prometheus/common v0.37.0
 	github.com/prometheus/procfs v0.8.0
 	github.com/urfave/cli/v2 v2.11.1
+	go.uber.org/zap v1.21.0
+	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
@@ -27,6 +23,7 @@ require (
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/prometheus/client_model v0.2.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
+	github.com/stretchr/testify v1.8.0 // indirect
 	github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect
 	go.uber.org/atomic v1.7.0 // indirect
 	go.uber.org/multierr v1.6.0 // indirect

go.sum

@@ -77,6 +77,7 @@ github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG
 github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
 github.com/go-stack/stack v1.8.0/go.mod h1:v0f6uXyyMGvRgIKkXu+yp6POWl0qKG85gN/melR3HDY=
 github.com/go-test/deep v1.1.0 h1:WOcxcdHcvdgThNXjw0t76K42FXTU7HpNQWHpA2HHNlg=
+github.com/go-test/deep v1.1.0/go.mod h1:5C2ZWiW0ErCdrYzpqxLbTX7MG14M9iiw8DgHncVwcsE=
 github.com/gogo/protobuf v1.1.1/go.mod h1:r8qH/GZQm5c6nD/R0oafs1akxWv10x8SbQlK7atdtwQ=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=