Add CI pipeline

.github/workflows/ci.yaml

@@ -0,0 +1,57 @@
+name: GoURN CI
+
+on:
+  push:
+    branches:
+      - 'main'
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - '*'
+
+jobs:
+  check:
+    name: Check
+    runs-on: ubuntu-latest
+    steps:
+    - name: Set up Go 1.20.x
+      uses: actions/setup-go@v4
+      with:
+        go-version: 1.20.x
+        cache-dependency-path: go.sum
+
+    - name: Checkout Code
+      uses: actions/checkout@v3
+
+    - name: go-fmt
+      run: |
+        if [ -n "$(gofmt -s -l .)" ]; then
+          echo "Go code is not formatted, run 'gofmt -s -w .'"
+          exit 1
+        fi
+
+    - name: go-vet
+      run: go vet ./...
+
+    - name: revive
+      run: |
+        go install github.com/mgechev/[email protected]
+        revive -config .revive.toml -formatter friendly ./...
+
+  test:
+    name: Test
+    needs: check
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v3
+
+    - name: Set up Go 1.20.x
+      uses: actions/setup-go@v4
+      with:
+        go-version: 1.20.x
+        cache-dependency-path: go.sum
+
+    - name: Test GoURN
+      run: go test -v -covermode=count -coverprofile=coverage.out ./...

.revive.toml

@@ -0,0 +1,28 @@
+ignoreGeneratedHeader = false
+severity = "warning"
+confidence = 0.8
+errorCode = 1
+warningCode = 1
+
+[rule.blank-imports]
+[rule.context-as-argument]
+[rule.context-keys-type]
+[rule.dot-imports]
+[rule.empty-block]
+[rule.error-naming]
+[rule.error-return]
+[rule.error-strings]
+[rule.errorf]
+[rule.exported]
+[rule.increment-decrement]
+[rule.indent-error-flow]
+[rule.range]
+[rule.receiver-naming]
+[rule.redefines-builtin-id]
+[rule.superfluous-else]
+[rule.time-naming]
+[rule.unexported-return]
+[rule.unreachable-code]
+[rule.unused-parameter]
+[rule.var-declaration]
+[rule.var-naming]

urn.go

@@ -8,6 +8,7 @@ import (
 )
 
 var (
+	// ErrInvalidURN represents an error for invalid URN
 	ErrInvalidURN  = errors.New("invalid URN")
 	genericPattern = regexp.MustCompile(`^(?i)urn:(?P<nid>[a-z0-9][a-z0-9-]{0,31}):(?P<nss>(?:[-a-z0-9()+,.:=@;$_!*'&~/]|%[0-9a-fA-F]{2})+)$`)
 )