1 files changed, 325 insertions, 0 deletions
diff --git a/build/lint.go b/build/lint.go
new file mode 100644
index 0000000000..bc6ddbec41
--- /dev/null
+++ b/build/lint.go
@@ -0,0 +1,325 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Copyright (c) 2018 Minko Gechev. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/BurntSushi/toml"
+	"github.com/mgechev/dots"
+	"github.com/mgechev/revive/formatter"
+	"github.com/mgechev/revive/lint"
+	"github.com/mgechev/revive/rule"
+	"github.com/mitchellh/go-homedir"
+)
+
+func fail(err string) {
+	fmt.Fprintln(os.Stderr, err)
+	os.Exit(1)
+}
+
+var defaultRules = []lint.Rule{
+	&rule.VarDeclarationsRule{},
+	&rule.PackageCommentsRule{},
+	&rule.DotImportsRule{},
+	&rule.BlankImportsRule{},
+	&rule.ExportedRule{},
+	&rule.VarNamingRule{},
+	&rule.IndentErrorFlowRule{},
+	&rule.IfReturnRule{},
+	&rule.RangeRule{},
+	&rule.ErrorfRule{},
+	&rule.ErrorNamingRule{},
+	&rule.ErrorStringsRule{},
+	&rule.ReceiverNamingRule{},
+	&rule.IncrementDecrementRule{},
+	&rule.ErrorReturnRule{},
+	&rule.UnexportedReturnRule{},
+	&rule.TimeNamingRule{},
+	&rule.ContextKeysType{},
+	&rule.ContextAsArgumentRule{},
+}
+
+var allRules = append([]lint.Rule{
+	&rule.ArgumentsLimitRule{},
+	&rule.CyclomaticRule{},
+	&rule.FileHeaderRule{},
+	&rule.EmptyBlockRule{},
+	&rule.SuperfluousElseRule{},
+	&rule.ConfusingNamingRule{},
+	&rule.GetReturnRule{},
+	&rule.ModifiesParamRule{},
+	&rule.ConfusingResultsRule{},
+	&rule.DeepExitRule{},
+	&rule.UnusedParamRule{},
+	&rule.UnreachableCodeRule{},
+	&rule.AddConstantRule{},
+	&rule.FlagParamRule{},
+	&rule.UnnecessaryStmtRule{},
+	&rule.StructTagRule{},
+	&rule.ModifiesValRecRule{},
+	&rule.ConstantLogicalExprRule{},
+	&rule.BoolLiteralRule{},
+	&rule.RedefinesBuiltinIDRule{},
+	&rule.ImportsBlacklistRule{},
+	&rule.FunctionResultsLimitRule{},
+	&rule.MaxPublicStructsRule{},
+	&rule.RangeValInClosureRule{},
+	&rule.RangeValAddress{},
+	&rule.WaitGroupByValueRule{},
+	&rule.AtomicRule{},
+	&rule.EmptyLinesRule{},
+	&rule.LineLengthLimitRule{},
+	&rule.CallToGCRule{},
+	&rule.DuplicatedImportsRule{},
+	&rule.ImportShadowingRule{},
+	&rule.BareReturnRule{},
+	&rule.UnusedReceiverRule{},
+	&rule.UnhandledErrorRule{},
+	&rule.CognitiveComplexityRule{},
+	&rule.StringOfIntRule{},
+}, defaultRules...)
+
+var allFormatters = []lint.Formatter{
+	&formatter.Stylish{},
+	&formatter.Friendly{},
+	&formatter.JSON{},
+	&formatter.NDJSON{},
+	&formatter.Default{},
+	&formatter.Unix{},
+	&formatter.Checkstyle{},
+	&formatter.Plain{},
+}
+
+func getFormatters() map[string]lint.Formatter {
+	result := map[string]lint.Formatter{}
+	for _, f := range allFormatters {
+		result[f.Name()] = f
+	}
+	return result
+}
+
+func getLintingRules(config *lint.Config) []lint.Rule {
+	rulesMap := map[string]lint.Rule{}
+	for _, r := range allRules {
+		rulesMap[r.Name()] = r
+	}
+
+	lintingRules := []lint.Rule{}
+	for name := range config.Rules {
+		rule, ok := rulesMap[name]
+		if !ok {
+			fail("cannot find rule: " + name)
+		}
+		lintingRules = append(lintingRules, rule)
+	}
+
+	return lintingRules
+}
+
+func parseConfig(path string) *lint.Config {
+	config := &lint.Config{}
+	file, err := ioutil.ReadFile(path)
+	if err != nil {
+		fail("cannot read the config file")
+	}
+	_, err = toml.Decode(string(file), config)
+	if err != nil {
+		fail("cannot parse the config file: " + err.Error())
+	}
+	return config
+}
+
+func normalizeConfig(config *lint.Config) {
+	if config.Confidence == 0 {
+		config.Confidence = 0.8
+	}
+	severity := config.Severity
+	if severity != "" {
+		for k, v := range config.Rules {
+			if v.Severity == "" {
+				v.Severity = severity
+			}
+			config.Rules[k] = v
+		}
+		for k, v := range config.Directives {
+			if v.Severity == "" {
+				v.Severity = severity
+			}
+			config.Directives[k] = v
+		}
+	}
+}
+
+func getConfig() *lint.Config {
+	config := defaultConfig()
+	if configPath != "" {
+		config = parseConfig(configPath)
+	}
+	normalizeConfig(config)
+	return config
+}
+
+func getFormatter() lint.Formatter {
+	formatters := getFormatters()
+	formatter := formatters["default"]
+	if formatterName != "" {
+		f, ok := formatters[formatterName]
+		if !ok {
+			fail("unknown formatter " + formatterName)
+		}
+		formatter = f
+	}
+	return formatter
+}
+
+func buildDefaultConfigPath() string {
+	var result string
+	if homeDir, err := homedir.Dir(); err == nil {
+		result = filepath.Join(homeDir, "revive.toml")
+		if _, err := os.Stat(result); err != nil {
+			result = ""
+		}
+	}
+
+	return result
+}
+
+func defaultConfig() *lint.Config {
+	defaultConfig := lint.Config{
+		Confidence: 0.0,
+		Severity:   lint.SeverityWarning,
+		Rules:      map[string]lint.RuleConfig{},
+	}
+	for _, r := range defaultRules {
+		defaultConfig.Rules[r.Name()] = lint.RuleConfig{}
+	}
+	return &defaultConfig
+}
+
+func normalizeSplit(strs []string) []string {
+	res := []string{}
+	for _, s := range strs {
+		t := strings.Trim(s, " \t")
+		if len(t) > 0 {
+			res = append(res, t)
+		}
+	}
+	return res
+}
+
+func getPackages() [][]string {
+	globs := normalizeSplit(flag.Args())
+	if len(globs) == 0 {
+		globs = append(globs, ".")
+	}
+
+	packages, err := dots.ResolvePackages(globs, normalizeSplit(excludePaths))
+	if err != nil {
+		fail(err.Error())
+	}
+
+	return packages
+}
+
+type arrayFlags []string
+
+func (i *arrayFlags) String() string {
+	return strings.Join([]string(*i), " ")
+}
+
+func (i *arrayFlags) Set(value string) error {
+	*i = append(*i, value)
+	return nil
+}
+
+var configPath string
+var excludePaths arrayFlags
+var formatterName string
+var help bool
+
+var originalUsage = flag.Usage
+
+func init() {
+	flag.Usage = func() {
+		originalUsage()
+	}
+	// command line help strings
+	const (
+		configUsage    = "path to the configuration TOML file, defaults to $HOME/revive.toml, if present (i.e. -config myconf.toml)"
+		excludeUsage   = "list of globs which specify files to be excluded (i.e. -exclude foo/...)"
+		formatterUsage = "formatter to be used for the output (i.e. -formatter stylish)"
+	)
+
+	defaultConfigPath := buildDefaultConfigPath()
+
+	flag.StringVar(&configPath, "config", defaultConfigPath, configUsage)
+	flag.Var(&excludePaths, "exclude", excludeUsage)
+	flag.StringVar(&formatterName, "formatter", "", formatterUsage)
+	flag.Parse()
+}
+
+func main() {
+	config := getConfig()
+	formatter := getFormatter()
+	packages := getPackages()
+
+	revive := lint.New(func(file string) ([]byte, error) {
+		return ioutil.ReadFile(file)
+	})
+
+	lintingRules := getLintingRules(config)
+
+	failures, err := revive.Lint(packages, lintingRules, *config)
+	if err != nil {
+		fail(err.Error())
+	}
+
+	formatChan := make(chan lint.Failure)
+	exitChan := make(chan bool)
+
+	var output string
+	go (func() {
+		output, err = formatter.Format(formatChan, *config)
+		if err != nil {
+			fail(err.Error())
+		}
+		exitChan <- true
+	})()
+
+	exitCode := 0
+	for f := range failures {
+		if f.Confidence < config.Confidence {
+			continue
+		}
+		if exitCode == 0 {
+			exitCode = config.WarningCode
+		}
+		if c, ok := config.Rules[f.RuleName]; ok && c.Severity == lint.SeverityError {
+			exitCode = config.ErrorCode
+		}
+		if c, ok := config.Directives[f.RuleName]; ok && c.Severity == lint.SeverityError {
+			exitCode = config.ErrorCode
+		}
+
+		formatChan <- f
+	}
+
+	close(formatChan)
+	<-exitChan
+	if output != "" {
+		fmt.Println(output)
+	}
+
+	os.Exit(exitCode)
+}