Add github actions

Add github actions workflow descriptor
Remove mage dependency
Add Makefile

.github/workflows/main.yaml

@@ -0,0 +1,38 @@
+name: GitHub Actions Workflow
+on: [push]
+jobs:
+  fmt:
+    name: Fmt
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.14.4'
+      - name: Fmt
+        run: go fmt github.com/pavel-v-chernykh/keystore-go/...
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+      - name: Lint
+        uses: golangci/golangci-lint-action@v1.2.1
+        with:
+          args: --timeout=5m0s -c .golangci.yaml
+          version: v1.27
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '1.14.4'
+      - name: Test
+        run: go test -cover -count=1 -v github.com/pavel-v-chernykh/keystore-go/...

.golangci.yaml

@@ -0,0 +1,28 @@
+modules-download-mode: readonly
+
+linters:
+  enable-all: true
+  disable:
+    - gochecknoglobals
+    - funlen
+    - goerr113
+
+linters-settings:
+  gomnd:
+    settings:
+      mnd:
+        checks: case,condition,return
+
+issues:
+  exclude-rules:
+    - path: _test\.go
+      linters:
+        - testpackage
+        - maligned
+        - dupl
+    - linters:
+        - gosec
+      text: "G401: "
+    - linters:
+        - gosec
+      text: "G505: "

Makefile

@@ -0,0 +1,13 @@
+fmt:
+	go fmt github.com/pavel-v-chernykh/keystore-go/...
+
+lint:
+	golangci-lint run -c .golangci.yaml
+
+test:
+	go test -cover -count=1 -v ./...
+
+all: fmt lint test
+
+.PHONY: fmt lint test all
+.DEFAULT_GOAL := all

common.go

@@ -25,6 +25,7 @@ func passwordBytes(password []byte) []byte {
 	for _, b := range password {
 		result = append(result, 0, b)
 	}
+
 	return result
 }
 

common_test.go

@@ -7,22 +7,27 @@ import (
 )
 
 func TestZeroing(t *testing.T) {
-	type zeroingItem struct {
-		input []byte
-	}
-	type zeroingTable []zeroingItem
+	type (
+		zeroingItem struct {
+			input []byte
+		}
+		zeroingTable []zeroingItem
+	)
 
 	var table zeroingTable
+
 	for i := 0; i < 20; i++ {
 		buf := make([]byte, 4096)
 		if _, err := rand.Read(buf); err != nil {
 			t.Errorf("read random bytes: %v", err)
 		}
+
 		table = append(table, zeroingItem{input: buf})
 	}
 
 	for _, tt := range table {
 		zeroing(tt.input)
+
 		for i := range tt.input {
 			if tt.input[i] != 0 {
 				t.Errorf("fill input with zeros '%v'", tt.input)
@@ -36,19 +41,25 @@ func TestPasswordBytes(t *testing.T) {
 		input  []byte
 		output []byte
 	}
+
 	var table []passwordBytesItem
+
 	for i := 0; i < 20; i++ {
 		input := make([]byte, 1024)
 		if _, err := rand.Read(input); err != nil {
 			t.Errorf("read random bytes: %v", err)
 		}
+
 		output := make([]byte, len(input)*2)
+
 		for j, k := 0, 0; j < len(output); j, k = j+2, k+1 {
 			output[j] = 0
 			output[j+1] = input[k]
 		}
+
 		table = append(table, passwordBytesItem{input: input, output: output})
 	}
+
 	for _, tt := range table {
 		output := passwordBytes(tt.input)
 		if !reflect.DeepEqual(output, tt.output) {