Add linters

.drone.yml

@@ -0,0 +1,9 @@
+kind: pipeline
+name: default
+
+steps:
+  - name: lint
+    image: golang:1.12
+    commands:
+      - make lint
+      - make golangci-lint

.golangci

@@ -0,0 +1,25 @@
+linters:
+  enable:
+    - gosimple
+    - deadcode
+    - typecheck
+    - govet
+    - errcheck
+    - staticcheck
+    - unused
+    - structcheck
+    - varcheck
+    - golint
+    - dupl
+    - gofmt
+    - misspell
+    - gocritic
+  enable-all: false
+  disable-all: true
+  fast: false
+
+linters-settings:
+  gocritic:
+    disabled-checks:
+      - ifElseChain
+      - singleCaseSwitch # Every time this occured in the code, there  was no other way.

Makefile

@@ -0,0 +1,13 @@
+.PHONY: golangci-lint
+golangci-lint:
+	@hash golangci-lint > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
+		curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(GOPATH)/bin v1.16.0; \
+	fi
+	golangci-lint run
+
+.PHONY: lint
+lint:
+	@hash golint > /dev/null 2>&1; if [ $$? -ne 0 ]; then \
+    	go get -u golang.org/x/lint/golint; \
+    fi
+	golint ./...

cmd/run.go

@@ -21,6 +21,7 @@ import (
 	"github.com/urfave/cli"
 )
 
+// CmdRun is the command to start the webserver
 var CmdRun = cli.Command{
 	Action: run,
 	Name:   "run",

config/config.go

@@ -39,6 +39,7 @@ func (k Key) setDefault(defaultValue interface{}) {
 	viper.SetDefault(string(k), defaultValue)
 }
 
+// This block contains all config keys
 const (
 	DaysUntilStale Key = "daysUntilStale"
 	DaysUntilClose Key = "daysUntilClose"
@@ -61,6 +62,7 @@ const (
 	SessionSecret Key = "session_secret"
 )
 
+// SetupConfig fills all default values, reads the config and/or writes the default config.
 func SetupConfig() error {
 	DaysUntilStale.setDefault(60)
 	DaysUntilClose.setDefault(7)
@@ -90,7 +92,9 @@ func SetupConfig() error {
 	viper.AddConfigPath(".")
 	if err := viper.SafeWriteConfigAs("config.yml"); err != nil {
 		if os.IsNotExist(err) {
-			err = viper.WriteConfigAs("config.yml")
+			if err := viper.WriteConfigAs("config.yml"); err != nil {
+				return err
+			}
 		}
 	}
 	return viper.ReadInConfig()

models/repository.go

@@ -16,6 +16,7 @@
 
 package models
 
+// Repository represents a Gitea repository indexed at the local database
 type Repository struct {
 	ID    int64  `xorm:"pk"`
 	Owner string `xorm:"unique(owner_name)"`

models/user.go

@@ -18,6 +18,7 @@ package models
 
 import "golang.org/x/oauth2"
 
+// User represents a signed in oauth2 gitea user saved in a session
 type User struct {
 	ID       int64
 	Username string

utils/secret.go

@@ -21,6 +21,7 @@ import (
 	"encoding/base64"
 )
 
+// NewSecret will generate a random string of the given length
 func NewSecret(length int) (string, error) {
 	secret := make([]byte, length)
 	if _, err := rand.Read(secret); err != nil {

web/router.go

@@ -23,6 +23,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
+// StartServer will start the webserver at the given addresses
 func StartServer(addr ...string) error {
 	r := gin.Default()
 	store := cookie.NewStore([]byte(config.SessionSecret.Get().(string)))