refactor: add more linters and fix findings (#100)

.drone.yml

@@ -8,7 +8,7 @@ platform:
 
 steps:
   - name: deps
-    image: golang:1.19
+    image: golang:1.20
     commands:
       - make deps
     volumes:
@@ -16,7 +16,7 @@ steps:
         path: /go
 
   - name: lint
-    image: golang:1.19
+    image: golang:1.20
     commands:
       - make lint
     volumes:
@@ -24,7 +24,7 @@ steps:
         path: /go
 
   - name: test
-    image: golang:1.19
+    image: golang:1.20
     commands:
       - make test
     volumes:
@@ -51,7 +51,7 @@ platform:
 
 steps:
   - name: build
-    image: techknowlogick/xgo:go-1.19.x
+    image: techknowlogick/xgo:go-1.20.x
     commands:
       - ln -s /drone/src /source
       - make release
@@ -292,6 +292,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: e3e2e1002f50516f1eb241ff22916f509547348fbfb819b050f61f772c463291
+hmac: 23c3365c3e827c02c0c57ab6d98e5bca2780471061b7976dad14578982404ad8
 
 ...

.golangci.yml

@@ -1,25 +1,92 @@
 linters:
-  enable:
-    - gosimple
-    - deadcode
-    - typecheck
-    - govet
-    - errcheck
-    - staticcheck
-    - unused
-    - structcheck
-    - varcheck
-    - dupl
-    - gofmt
-    - misspell
-    - gocritic
-    - bidichk
-    - ineffassign
-    - revive
-    - gofumpt
-    - depguard
   enable-all: false
   disable-all: true
+  enable:
+    - errcheck
+    - gosimple
+    - govet
+    - ineffassign
+    - staticcheck
+    - typecheck
+    - unused
+    - asasalint
+    - asciicheck
+    - bidichk
+    - bodyclose
+    - containedctx
+    - contextcheck
+    - decorder
+    - depguard
+    - dogsled
+    - dupl
+    - dupword
+    - durationcheck
+    - errchkjson
+    - errname
+    - errorlint
+    - execinquery
+    - exhaustive
+    - exportloopref
+    - forcetypeassert
+    - ginkgolinter
+    - gocheckcompilerdirectives
+    - gochecknoglobals
+    - gochecknoinits
+    - gocognit
+    - goconst
+    - gocritic
+    - gocyclo
+    - godot
+    - godox
+    - goerr113
+    - gofmt
+    - gofumpt
+    - goheader
+    - goimports
+    - gomnd
+    - gomoddirectives
+    - gomodguard
+    - goprintffuncname
+    - gosec
+    - grouper
+    - importas
+    - interfacebloat
+    - ireturn
+    - lll
+    - loggercheck
+    - maintidx
+    - makezero
+    - misspell
+    - musttag
+    - nakedret
+    - nestif
+    - nilerr
+    - nilnil
+    - nlreturn
+    - noctx
+    - nolintlint
+    - nonamedreturns
+    - nosprintfhostport
+    - prealloc
+    - predeclared
+    - promlinter
+    - reassign
+    - revive
+    # - rowserrcheck
+    # - sqlclosecheck
+    # - structcheck
+    - stylecheck
+    - tagliatelle
+    - tenv
+    - testableexamples
+    - thelper
+    - tparallel
+    - unconvert
+    - unparam
+    - usestdlibvars
+    # - wastedassign
+    - whitespace
+    - wsl
   fast: false
 
 run:
@@ -28,4 +95,4 @@ run:
 linters-settings:
   gofumpt:
     extra-rules: true
-    lang-version: "1.18"
+    lang-version: "1.20"

Makefile

@@ -19,7 +19,7 @@ GOLANGCI_LINT_PACKAGE ?= github.com/golangci/golangci-lint/cmd/golangci-lint@$(G
 XGO_PACKAGE ?= src.techknowlogick.com/xgo@latest
 
 GENERATE ?=
-XGO_VERSION := go-1.19.x
+XGO_VERSION := go-1.20.x
 XGO_TARGETS ?= linux/amd64,linux/arm-6,linux/arm-7,linux/arm64
 
 TARGETOS ?= linux

cmd/drone-matrix/config.go

@@ -58,9 +58,10 @@ func settingsFlags(settings *plugin.Settings, category string) []cli.Flag {
 			Category:    category,
 		},
 		&cli.StringFlag{
-			Name:        "template",
-			EnvVars:     []string{"PLUGIN_TEMPLATE", "MATRIX_TEMPLATE"},
-			Usage:       "message template",
+			Name:    "template",
+			EnvVars: []string{"PLUGIN_TEMPLATE", "MATRIX_TEMPLATE"},
+			Usage:   "message template",
+			//nolint:lll
 			Value:       "Build {{ build.Status }} [{{ repo.Owner }}/{{ repo.Name }}#{{ truncate commit.SHA 8 }}]({{ build.Link }}) ({{ build.Branch }}) by {{ commit.Author }}",
 			Destination: &settings.Template,
 			Category:    category,

cmd/drone-matrix/main.go

@@ -17,6 +17,7 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
+//nolint:gochecknoglobals
 var (
 	BuildVersion = "devel"
 	BuildDate    = "00000000"

go.mod

@@ -1,6 +1,6 @@
 module github.com/drone-plugins/drone-matrix
 
-go 1.19
+go 1.20
 
 require (
 	github.com/joho/godotenv v1.4.0

plugin/impl.go

@@ -7,6 +7,7 @@
 package plugin
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 
@@ -31,10 +32,13 @@ type Settings struct {
 	Template    string
 }
 
+var ErrAuthSourceNotSet = errors.New("either username and password or userid and accesstoken are required")
+
 // Validate handles the settings validation of the plugin.
 func (p *Plugin) Validate() error {
-	if (p.settings.Username == "" || p.settings.Password == "") && (p.settings.UserID == "" || p.settings.AccessToken == "") {
-		return fmt.Errorf("either username and password or userid and accesstoken are required")
+	if (p.settings.Username == "" || p.settings.Password == "") &&
+		(p.settings.UserID == "" || p.settings.AccessToken == "") {
+		return ErrAuthSourceNotSet
 	}
 
 	return nil
@@ -43,6 +47,7 @@ func (p *Plugin) Validate() error {
 // Execute provides the implementation of the plugin.
 func (p *Plugin) Execute() error {
 	muid := id.NewUserID(prepend("@", p.settings.UserID), p.settings.Homeserver)
+
 	client, err := mautrix.NewClient(p.settings.Homeserver, muid, p.settings.AccessToken)
 	if err != nil {
 		return fmt.Errorf("failed to initialize client: %w", err)
@@ -60,7 +65,8 @@ func (p *Plugin) Execute() error {
 			return fmt.Errorf("failed to authenticate user: %w", err)
 		}
 	}
-	logrus.Info("successfully logged in")
+
+	logrus.Info("logged in successfully")
 
 	joined, err := client.JoinRoom(prepend("!", p.settings.RoomID), "", nil)
 	if err != nil {
@@ -86,19 +92,20 @@ func (p *Plugin) Execute() error {
 	if _, err := client.SendMessageEvent(joined.RoomID, event.EventMessage, content); err != nil {
 		return fmt.Errorf("failed to submit message: %w", err)
 	}
+
 	logrus.Info("message sent successfully")
 
 	return nil
 }
 
-func prepend(prefix, s string) string {
-	if s == "" {
-		return s
+func prepend(prefix, input string) string {
+	if strings.TrimSpace(input) == "" {
+		return input
 	}
 
-	if strings.HasPrefix(s, prefix) {
-		return s
+	if strings.HasPrefix(input, prefix) {
+		return input
 	}
 
-	return prefix + s
+	return prefix + input
 }

plugin/plugin.go

@@ -18,7 +18,7 @@ type Plugin struct {
 }
 
 // New initializes a plugin from the given Settings, Pipeline, and Network.
-func New(settings Settings, pipeline drone.Pipeline, network drone.Network) drone.Plugin {
+func New(settings Settings, pipeline drone.Pipeline, network drone.Network) *Plugin {
 	return &Plugin{
 		settings: settings,
 		pipeline: pipeline,