Merge pull request #66 from wneessen/golangci-lint

Introduce golangci-lint

.github/workflows/golangci-lint.yml

@@ -0,0 +1,49 @@
+# SPDX-FileCopyrightText: 2022 Winni Neessen <winni@neessen.dev>
+#
+# SPDX-License-Identifier: CC0-1.0
+
+name: golangci-lint
+on:
+  push:
+    tags:
+      - v*
+    branches:
+      - main
+  pull_request:
+permissions:
+  contents: read
+  # Optional: allow read access to pull request. Use with `only-new-issues` option.
+  # pull-requests: read
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/setup-go@v3
+        with:
+          go-version: 1.19
+      - uses: actions/checkout@v3
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          # Optional: version of golangci-lint to use in form of v1.2 or v1.2.3 or `latest` to use the latest version
+          version: latest
+
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true
+
+          # Optional: if set to true then the all caching functionality will be complete disabled,
+          #           takes precedence over all other caching options.
+          # skip-cache: true
+
+          # Optional: if set to true then the action don't cache or restore ~/go/pkg.
+          # skip-pkg-cache: true
+
+          # Optional: if set to true then the action don't cache or restore ~/.cache/go-build.
+          # skip-build-cache: true

.gitignore

@@ -20,7 +20,7 @@
 
 # Local testfiles and auth data
 .auth
-cmd/*
+examples/*
 
 # SonarQube
 .scannerwork/

.golangci.toml

@@ -0,0 +1,11 @@
+## SPDX-FileCopyrightText: 2022 Winni Neessen <winni@neessen.dev>
+##
+## SPDX-License-Identifier: MIT
+
+[run]
+go = "1.16"
+tests = true
+
+[linters]
+enable = ["stylecheck", "whitespace", "containedctx", "contextcheck", "decorder",
+    "errname", "errorlint", "gofmt", "gofumpt"]

auth/auth_test.go

@@ -20,9 +20,13 @@ func TestAuth(t *testing.T) {
 	}
 
 	authTests := []authTest{
-		{LoginAuth("user", "pass", "testserver"),
-			[]string{"Username:", "Password:", "2.7.0 Authentication successful", "Invalid:"}, "LOGIN",
-			[]string{"", "user", "pass", "", ""}, []bool{false, false, false, true}},
+		{
+			LoginAuth("user", "pass", "testserver"),
+			[]string{"Username:", "Password:", "2.7.0 Authentication successful", "Invalid:"},
+			"LOGIN",
+			[]string{"", "user", "pass", "", ""},
+			[]bool{false, false, false, true},
+		},
 	}
 
 testLoop:

client.go

@@ -9,12 +9,13 @@ import (
 	"crypto/tls"
 	"errors"
 	"fmt"
-	"github.com/wneessen/go-mail/auth"
 	"net"
 	"net/smtp"
 	"os"
 	"strings"
 	"time"
+
+	"github.com/wneessen/go-mail/auth"
 )
 
 // Defaults
@@ -504,7 +505,7 @@ func (c *Client) Send(ml ...*Msg) error {
 		}
 
 		if err := c.Reset(); err != nil {
-			return fmt.Errorf("sending RSET command failed: %s", err)
+			return fmt.Errorf("sending RSET command failed: %w", err)
 		}
 		if err := c.checkConn(); err != nil {
 			return fmt.Errorf("failed to check server connection: %w", err)
@@ -555,7 +556,7 @@ func (c *Client) DialAndSendWithContext(ctx context.Context, ml ...*Msg) error {
 		return fmt.Errorf("send failed: %w", err)
 	}
 	if err := c.Close(); err != nil {
-		return fmt.Errorf("failed to close connction: %s", err)
+		return fmt.Errorf("failed to close connction: %w", err)
 	}
 	return nil
 }

client_test.go

@@ -8,11 +8,12 @@ import (
 	"context"
 	"crypto/tls"
 	"fmt"
-	"github.com/wneessen/go-mail/auth"
 	"net/smtp"
 	"os"
 	"testing"
 	"time"
+
+	"github.com/wneessen/go-mail/auth"
 )
 
 // DefaultHost is used as default hostname for the Client
@@ -89,9 +90,11 @@ func TestNewClientWithOptions(t *testing.T) {
 		{"WithTLSConfig()", WithTLSConfig(&tls.Config{}), false},
 		{"WithTLSConfig(); config is nil", WithTLSConfig(nil), true},
 		{"WithSMTPAuth()", WithSMTPAuth(SMTPAuthLogin), false},
-		{"WithSMTPAuthCustom()",
+		{
+			"WithSMTPAuthCustom()",
 			WithSMTPAuthCustom(smtp.PlainAuth("", "", "", "")),
-			false},
+			false,
+		},
 		{"WithUsername()", WithUsername("test"), false},
 		{"WithPassword()", WithPassword("test"), false},
 		{"WithDSN()", WithDSN(), false},
@@ -99,8 +102,10 @@ func TestNewClientWithOptions(t *testing.T) {
 		{"WithDSNMailReturnType() wrong option", WithDSNMailReturnType("FAIL"), true},
 		{"WithDSNRcptNotifyType()", WithDSNRcptNotifyType(DSNRcptNotifySuccess), false},
 		{"WithDSNRcptNotifyType() wrong option", WithDSNRcptNotifyType("FAIL"), true},
-		{"WithDSNRcptNotifyType() NEVER combination",
-			WithDSNRcptNotifyType(DSNRcptNotifySuccess, DSNRcptNotifyNever), true},
+		{
+			"WithDSNRcptNotifyType() NEVER combination",
+			WithDSNRcptNotifyType(DSNRcptNotifySuccess, DSNRcptNotifyNever), true,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -796,7 +801,6 @@ func TestClient_DialSendCloseBroken(t *testing.T) {
 			}
 		})
 	}
-
 }
 
 // TestClient_DialSendCloseBrokenWithDSN tests the Dial(), Send() and Close() method of Client with
@@ -857,7 +861,6 @@ func TestClient_DialSendCloseBrokenWithDSN(t *testing.T) {
 			}
 		})
 	}
-
 }
 
 // TestClient_auth tests the Dial(), Send() and Close() method of Client with broken settings
@@ -948,10 +951,10 @@ func getTestConnection(auth bool) (*Client, error) {
 		}
 	}
 	if err := c.DialWithContext(context.Background()); err != nil {
-		return c, fmt.Errorf("connection to test server failed: %s", err)
+		return c, fmt.Errorf("connection to test server failed: %w", err)
 	}
 	if err := c.Close(); err != nil {
-		return c, fmt.Errorf("disconnect from test server failed: %s", err)
+		return c, fmt.Errorf("disconnect from test server failed: %w", err)
 	}
 	return c, nil
 }
@@ -985,10 +988,10 @@ func getTestConnectionWithDSN(auth bool) (*Client, error) {
 		}
 	}
 	if err := c.DialWithContext(context.Background()); err != nil {
-		return c, fmt.Errorf("connection to test server failed: %s", err)
+		return c, fmt.Errorf("connection to test server failed: %w", err)
 	}
 	if err := c.Close(); err != nil {
-		return c, fmt.Errorf("disconnect from test server failed: %s", err)
+		return c, fmt.Errorf("disconnect from test server failed: %w", err)
 	}
 	return c, nil
 }

doc_test.go

@@ -7,10 +7,11 @@ package mail_test
 import (
 	"context"
 	"fmt"
-	"github.com/wneessen/go-mail"
 	"os"
 	"text/template"
 	"time"
+
+	"github.com/wneessen/go-mail"
 )
 
 // Code example for the NewClient method