Adding log_rotation

.gitignore

@@ -5,6 +5,7 @@ artifacts
 *.dll
 *.so
 *.dylib
+coverage
 
 # Test binary, built with `go test -c`
 *.test

Makefile

@@ -1,6 +1,7 @@
 # Inspired from https://dustinspecker.com/posts/go-combined-unit-integration-code-coverage/ and https://netdevops.me/2023/test-coverage-for-go-integration-tests/
 BIN_DIR = $(CURDIR)/artifacts
 BINARY = $(BIN_DIR)/gocustomurls
+COVERAGE_DIR = $(CURDIR)/coverage
 CURRENT_DIR = $(shell pwd)
 CUR_TAG = $(shell git tag | sort -g | tail -1 | cut -c 2-)
 VERSION_NUMBER ?= 0.0.0
@@ -29,4 +30,25 @@ lint:
 
 .PHONY: build
 build:
-	go build -o $(BINARY)
+	go build -o $(BINARY)
+
+.PHONY: build-debug
+build-debug:
+	mkdir -p $(BIN_DIR)
+	go build -cover -o $(BINARY) .
+
+.PHONY: test
+test: build-debug
+	rm -rf $(COVERAGE_DIR)
+	mkdir -p $(COVERAGE_DIR)
+	go test -cover ./... -args -test.gocoverdir="$(COVERAGE_DIR)"
+
+.PHONY: coverage-full
+coverage-full: test
+	go tool covdata textfmt -i=$(COVERAGE_DIR) -o $(COVERAGE_DIR)/coverage.out
+	go tool cover -func=$(COVERAGE_DIR)/coverage.out
+
+.PHONY: coverage-html
+coverage-html: coverage-full
+	go tool cover -html=./coverage/coverage.out -o ./coverage/coverage.html
+	open ./coverage/coverage.html

README.md

@@ -74,4 +74,5 @@ do this instead
 
 * [x] Fix permission errors around opening the app.log and rules.json.
 * [x] Make the flags (config, rules) required instead of optional.
-* [ ] Figure how to use logrotate (a linux utility)
+~~* [ ] Figure how to use logrotate (a linux utility)~~
+* [ ] Figure how to do log rotation as part of this app's function

app.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"net/http"
+	"time"
 )
 
 type Application struct {
@@ -24,7 +25,8 @@ func (app *Application) routes() {
 func (app *Application) Setup(port string) *http.Server {
 	app.routes()
 	return &http.Server{
-		Addr:    fmt.Sprintf(":%s", port),
-		Handler: app.Mux,
+		Addr:        fmt.Sprintf(":%s", port),
+		Handler:     app.Mux,
+		ReadTimeout: 2500 * time.Millisecond,
 	}
 }

conf.go

@@ -4,8 +4,18 @@ import (
 	"encoding/json"
 	"fmt"
 	"os"
+	"path/filepath"
+	"strings"
 )
 
+type parsedConf struct {
+	RulesFp      string `json:"rulesPath"`
+	LogFp        string `json:"logPath"`
+	Compression  bool   `json:"compress"`
+	SizeToRotate string `json:"sizeToRotate"`
+	Port         string `json:"port"`
+}
+
 type Config struct {
 	MappingFilePath string
 	MappingRules    ImportRulesMappings
@@ -62,3 +72,105 @@ func (c *Config) LoadMappingFile(fp string) error {
 	}
 	return nil
 }
+
+func getDefaults() (map[string]string, error) {
+	m := make(map[string]string)
+	confDir, err := os.UserConfigDir()
+	if err != nil {
+		return m, err
+	}
+	homeDir, err := os.UserHomeDir()
+	if err != nil {
+		return m, err
+	}
+	m["rulesFp"] = filepath.Join(confDir, "gocustomcurls", "rules.json")
+	m["confFp"] = filepath.Join(confDir, "gocustomcurls", "config.json")
+	m["logFp"] = filepath.Join(homeDir, ".gocustomurls", "logs", "app.log")
+	return m, nil
+}
+
+func generateDefaultConfigFile(defaultObj map[string]string) (parsedConf, error) {
+	var p parsedConf
+	var err error
+	var defaults map[string]string
+	if len(defaultObj) == 0 {
+		defaults, err = getDefaults()
+	} else {
+		defaults = defaultObj
+	}
+
+	if err != nil {
+		return p, err
+	}
+	parentDir := filepath.Dir(defaults["confFp"])
+	err = os.MkdirAll(parentDir, 0755)
+	if err != nil {
+		return p, err
+	}
+	f, err := os.OpenFile(defaults["confFp"], os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		return p, err
+	}
+	defer f.Close()
+	p.RulesFp = defaults["rulesFp"]
+	p.LogFp = defaults["logFp"]
+	p.Port = "7070"
+	p.Compression = true
+	p.SizeToRotate = "5MiB"
+	jsonString, _ := json.Marshal(p)
+	err = os.WriteFile(defaults["confFp"], jsonString, 0666)
+	if err != nil {
+		return p, err
+	}
+	return p, nil
+}
+
+func checkIfSizeIsConfigured(fsize string) (bool, error) {
+	suffixes := []string{"KB", "MB", "GB"}
+	var found string
+	for _, suffix := range suffixes {
+		if strings.HasSuffix(fsize, suffix) {
+			found = suffix
+		}
+	}
+	if len(found) == 0 {
+		return false, fmt.Errorf("%s has the incorrect suffix, Please use one of this suffixes {\"KB\", \"MB\", \"GB\"}", fsize)
+	}
+
+	return true, nil
+}
+
+// load the main config file
+func (c *Config) LoadMainConfigFile(fp string) (parsedConf, error) {
+	var conf parsedConf
+	var err error
+	ok := isFile(fp)
+	if !ok {
+		// generate config file
+		errorLog.Println("Warning, generating default config file")
+		conf, err = generateDefaultConfigFile(map[string]string{})
+		if err != nil {
+			return conf, err
+		}
+		c.MappingFilePath = conf.RulesFp
+		return conf, nil
+	}
+	f, err := os.Open(fp)
+	if err != nil {
+		return conf, err
+	}
+	defer f.Close()
+
+	err = json.NewDecoder(f).Decode(&conf)
+	if err != nil {
+		return conf, err
+	}
+
+	_, err = checkIfSizeIsConfigured(conf.SizeToRotate)
+	if err != nil {
+		return conf, err
+	}
+
+	c.MappingFilePath = conf.RulesFp
+	return conf, nil
+}

conf_test.go

@@ -0,0 +1,126 @@
+package main
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestLoadMappingFile(t *testing.T) {
+
+	t.Run("load the mapping file correctly - initial load", func(t *testing.T) {
+		tmpDir := t.TempDir()
+
+		mkDirForTest(t, fmt.Sprintf("%s/tmp", tmpDir))
+		rulesJsonFp := "testData/rules.json"
+
+		expected := fmt.Sprintf("%s/tmp/rules.json", tmpDir)
+
+		cpFileForTest(t, rulesJsonFp, expected)
+
+		cfg := &Config{}
+
+		assert.Equal(t, cfg.MappingFilePath, "")
+		assert.Empty(t, cfg.MappingRules)
+		err := cfg.LoadMappingFile(expected)
+		assert.Equal(t, err, nil)
+		assert.Equal(t, cfg.MappingFilePath, expected)
+		assert.NotEmpty(t, cfg.MappingRules)
+	})
+
+	t.Run("load the mapping file correctly - reload", func(t *testing.T) {
+		tmpDir := t.TempDir()
+
+		mkDirForTest(t, fmt.Sprintf("%s/tmp", tmpDir))
+		rulesJsonFp := "testData/rules.json"
+
+		expected := fmt.Sprintf("%s/tmp/rules.json", tmpDir)
+
+		cpFileForTest(t, rulesJsonFp, expected)
+
+		cfg := &Config{}
+
+		assert.Equal(t, cfg.MappingFilePath, "")
+		assert.Empty(t, cfg.MappingRules)
+		err := cfg.LoadMappingFile(expected)
+		assert.Equal(t, err, nil)
+		assert.Equal(t, cfg.MappingFilePath, expected)
+		assert.NotEmpty(t, cfg.MappingRules)
+		oldRules := cfg.MappingRules
+
+		rulesJsonFp = "testData/rules2.json"
+
+		cpFileForTest(t, rulesJsonFp, expected)
+
+		err = cfg.LoadMappingFile(expected)
+		assert.Equal(t, err, nil)
+		assert.Equal(t, cfg.MappingFilePath, expected)
+		assert.NotEmpty(t, cfg.MappingRules)
+
+		newRules := cfg.MappingRules
+
+		assert.NotEqualValues(t, oldRules, newRules)
+	})
+}
+
+func TestGetDefaults(t *testing.T) {
+	actual, err := getDefaults()
+	assert.Equal(t, err, nil)
+	assert.Contains(t, actual, "rulesFp")
+	assert.Contains(t, actual, "logFp")
+	assert.Contains(t, actual, "confFp")
+}
+
+func TestSizeIsConfigured(t *testing.T) {
+	tests := map[string]struct {
+		input string
+		want  bool
+	}{
+		"wrong input - K":    {input: "5677.45K", want: false},
+		"wrong input - KiB":  {input: "5677.45KiB", want: false},
+		"wrong input - M":    {input: "9.45M", want: false},
+		"wrong input - G":    {input: "9.45G", want: false},
+		"correct input - KB": {input: "5.45KB", want: true},
+		"correct input - MB": {input: "5677.45MB", want: true},
+		"correct input - GB": {input: "9.45GB", want: true},
+	}
+
+	for name, tc := range tests {
+		t.Run(name, func(t *testing.T) {
+			got, _ := checkIfSizeIsConfigured(tc.input)
+			assert.Equal(t, got, tc.want)
+		})
+	}
+}
+
+func TestGenerateConfigFile(t *testing.T) {
+	tmpDir := t.TempDir()
+
+	tempLogsDir := fmt.Sprintf("%s/tmp/logs", tmpDir)
+	tempConfigDir := fmt.Sprintf("%s/tmp/config", tmpDir)
+
+	mkDirForTest(t, tempLogsDir)
+	mkDirForTest(t, tempConfigDir)
+
+	defaultConfig := map[string]string{
+		"rulesFp": fmt.Sprintf("%s/rules.json", tempConfigDir),
+		"confFp":  fmt.Sprintf("%s/config.json", tempConfigDir),
+		"logFp":   fmt.Sprintf("%s/app.log", tempLogsDir),
+	}
+
+	ok := IsDirEmpty(t, tempConfigDir)
+	assert.Equal(t, ok, true)
+	ok = IsDirEmpty(t, tempLogsDir)
+	assert.Equal(t, ok, true)
+
+	expected, err := generateDefaultConfigFile(defaultConfig)
+	assert.Equal(t, err, nil)
+	assert.NotEmpty(t, expected)
+
+	ok = IsDirEmpty(t, tempConfigDir)
+	assert.Equal(t, ok, false)
+	ok = IsDirEmpty(t, tempLogsDir)
+	assert.Equal(t, ok, true)
+
+}

go.mod

@@ -1,3 +1,11 @@
 module gocustomurls
 
 go 1.20
+
+require github.com/stretchr/testify v1.9.0
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,10 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

logger.go

@@ -1,12 +1,18 @@
 package main
 
 import (
+	"bufio"
+	"compress/gzip"
 	"encoding/json"
+	"fmt"
+	"io"
 	"log"
+	"math"
 	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
+	"sync"
 	"time"
 )
 
@@ -40,9 +46,10 @@ var (
 )
 
 type LogFile struct {
-	handle *os.File
-	logger *log.Logger
-	path   string
+	handle   *os.File
+	logger   *log.Logger
+	path     string
+	fileLock sync.Mutex
 }
 
 type LogFileRec struct {
@@ -51,28 +58,176 @@ type LogFileRec struct {
 	Url    string `json:"url"`
 }
 
-func newFileLogger(path string) (*LogFile, error) {
+func (lf *LogFile) makeCopyTo(dst string) error {
+	var err error
+	r, err := os.Open(lf.path)
+	if err != nil {
+		return err
+	}
+	defer r.Close()
+
+	w, err := os.OpenFile(dst, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if c := w.Close(); err == nil {
+			err = c
+		}
+	}()
+
+	_, err = io.Copy(w, r)
+	return err
+}
+
+func (lf *LogFile) truncate() error {
+	fd, err := os.OpenFile(lf.path, os.O_TRUNC, 0666)
+	if err != nil {
+		return fmt.Errorf("could not open file %q for truncation: %v", lf.path, err)
+	}
+	err = fd.Close()
+	if err != nil {
+		return fmt.Errorf("could not close file handler for %q after truncation: %v", lf.path, err)
+	}
+	return nil
+}
+
+func prettyByteSize(b int64) string {
+	bf := float64(b)
+	for _, unit := range []string{"", "K", "M", "G", "T", "P", "E", "Z"} {
+		if math.Abs(bf) < 1024.0 {
+			return fmt.Sprintf("%3.1f%sB", bf, unit)
+		}
+		bf /= 1024.0
+	}
+	return fmt.Sprintf("%.1fYB", bf)
+}
+
+func compressOldFile(fname string) error {
+	reader, err := os.Open(fname)
+	if err != nil {
+		return fmt.Errorf("compressOldFile: failed to open existing file %s: %w", fname, err)
+	}
+	defer reader.Close()
+
+	buffer := bufio.NewReader(reader)
+	fnameGz := fname + ".gz"
+	fw, err := os.OpenFile(fnameGz, os.O_WRONLY|os.O_CREATE, 0666)
+	if err != nil {
+		return fmt.Errorf("compressOldFile: failed to open new file %s: %w", fnameGz, err)
+	}
+	defer fw.Close()
+
+	zw, err := gzip.NewWriterLevel(fw, gzip.BestCompression)
+	if err != nil {
+		return fmt.Errorf("compressOldFile: failed to create gzip writer: %w", err)
+	}
+	defer zw.Close()
+
+	_, err = buffer.WriteTo(zw)
+	if err != nil {
+		_ = zw.Close()
+		_ = fw.Close()
+		return fmt.Errorf("compressOldFile: failed to write to gz file: %w", err)
+	}
+	_ = reader.Close()
+
+	err = os.Remove(fname)
+	if err != nil {
+		return fmt.Errorf("compressOldFile: failed to delete old file: %w", err)
+	}
+	return nil
+}
+
+func (lf *LogFile) rotate() error {
+	lf.fileLock.Lock()
+	defer lf.fileLock.Unlock()
+
+	prefix := fmt.Sprintf("%s.%s", lf.handle.Name(), time.Now().Format("2006-01-02"))
+
+	// close file to allow for read-only access
+	err := lf.handle.Close()
+	if err != nil {
+		return err
+	}
+
+	// make a copy of the old log file
+	err = lf.makeCopyTo(prefix)
+	if err != nil {
+		return err
+	}
+
+	// compress the new log file
+	err = compressOldFile(prefix)
+	if err != nil {
+		return err
+	}
+
+	// truncate the old log file
+	err = lf.truncate()
+	if err != nil {
+		return err
+	}
+
+	f, err := os.OpenFile(lf.path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		return err
+	}
+
+	lf.handle = f
+	return nil
+}
+
+func (lf *LogFile) open(maxSize string) error {
+	f, err := os.OpenFile(lf.path, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	if err != nil {
+		return err
+	}
+	finfo, err := f.Stat()
+	if err != nil {
+		return err
+	}
+	curSize := prettyByteSize(finfo.Size())
+	if curSize > maxSize {
+		err = lf.rotate()
+		if err != nil {
+			return err
+		}
+	}
+	lf.handle = f
+	lf.logger = log.New(f, "", 0)
+	return nil
+}
+
+func newFileLogger(path string, maxSize string) (*LogFile, error) {
 	requestedFile := filepath.Clean(filepath.Join("/", path))
 	parentDir := filepath.Dir(requestedFile)
-	err := os.MkdirAll(parentDir, 0777)
+	err := os.MkdirAll(parentDir, 0755)
 	if err != nil {
 		return nil, err
 	}
-	f, err := os.OpenFile(requestedFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
-	if err != nil {
-		return nil, err
+	lf := &LogFile{
+		path: path,
 	}
-	return &LogFile{
-		handle: f,
-		logger: log.New(f, "", 0),
-		path:   path,
-	}, nil
+	err = lf.open(maxSize)
+	return lf, err
+	// f, err := os.OpenFile(requestedFile, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0666)
+	// if err != nil {
+	// 	return nil, err
+	// }
+	// return &LogFile{
+	// 	handle: f,
+	// 	logger: log.New(f, "", 0),
+	// 	path:   path,
+	// }, nil
 }
 
 func (f *LogFile) Close() error {
 	if f == nil {
 		return nil
 	}
+	f.fileLock.Lock()
+	defer f.fileLock.Unlock()
 	err := f.handle.Close()
 	f.handle = nil
 	return err
@@ -140,6 +295,8 @@ func (f *LogFile) WriteLog(r *http.Request) error {
 	if f == nil {
 		return nil
 	}
+	f.fileLock.Lock()
+	defer f.fileLock.Unlock()
 	var rec = make(map[string]string)
 	rec["method"] = r.Method
 	rec["requestUri"] = r.RequestURI

main.go

@@ -9,7 +9,6 @@ import (
 	"net/http"
 	"os"
 	"os/signal"
-	"path/filepath"
 	"strconv"
 	"syscall"
 	"time"
@@ -33,27 +32,27 @@ func flagsSet(flags *flag.FlagSet) map[string]bool {
 }
 
 // generateDefaults - generate the default values for the rules.json and log files
-func generateDefaults(rulesfp string, logfp string) (string, string, error) {
-	var newlogfp, newrulesfp string
-	var err error
-	newlogfp = logfp
-	newrulesfp = rulesfp
-	if len(newrulesfp) == 0 {
-		dir, err := os.UserConfigDir()
-		if err != nil {
-			return newrulesfp, newlogfp, err
-		}
-		newrulesfp = filepath.Join(dir, "gocustomcurls", "rules.json")
-	}
-	if len(newlogfp) == 0 {
-		dir, err := os.UserHomeDir()
-		if err != nil {
-			return newrulesfp, newlogfp, err
-		}
-		newlogfp = filepath.Join(dir, ".gocustomurls", "logs", "app.log")
-	}
-	return newrulesfp, newlogfp, err
-}
+// func generateDefaults(rulesfp string, logfp string) (string, string, error) {
+// 	var newlogfp, newrulesfp string
+// 	var err error
+// 	newlogfp = logfp
+// 	newrulesfp = rulesfp
+// 	if len(newrulesfp) == 0 {
+// 		dir, err := os.UserConfigDir()
+// 		if err != nil {
+// 			return newrulesfp, newlogfp, err
+// 		}
+// 		newrulesfp = filepath.Join(dir, "gocustomcurls", "rules.json")
+// 	}
+// 	if len(newlogfp) == 0 {
+// 		dir, err := os.UserHomeDir()
+// 		if err != nil {
+// 			return newrulesfp, newlogfp, err
+// 		}
+// 		newlogfp = filepath.Join(dir, ".gocustomurls", "logs", "app.log")
+// 	}
+// 	return newrulesfp, newlogfp, err
+// }
 
 // isValidPort returns true if the port is valid
 // following the RFC https://datatracker.ietf.org/doc/html/rfc6056#section-2.1
@@ -74,9 +73,11 @@ func main() {
 		flags.PrintDefaults()
 	}
 
-	portFlag := flags.String("port", "7070", "Optional. Default port is 7070. Port to listen to")
-	rulesFileFlag := flags.String("config", "", "Optional. Contains go-import mapping")
-	logFileFlag := flags.String("logfile", "", "Optional. Default log file")
+	confFlag := flags.String("conf", "", "Required. Contains all the configurations options")
+
+	// portFlag := flags.String("port", "7070", "Optional. Default port is 7070. Port to listen to")
+	// rulesFileFlag := flags.String("rules", "", "Optional. Contains go-import mapping")
+	// logFileFlag := flags.String("logfile", "", "Optional. Default log file")
 	flags.Parse(os.Args[1:])
 
 	if len(flags.Args()) > 1 {
@@ -87,14 +88,23 @@ func main() {
 
 	allSetFlags := flagsSet(flags)
 
-	var port string
-	if allSetFlags["port"] {
-		port = *portFlag
-	} else {
-		port = "7070"
+	if !allSetFlags["conf"] {
+		errorLog.Println("Error: conf arguments must be set")
+		flags.Usage()
+		os.Exit(1)
 	}
 
-	p, err := strconv.Atoi(port)
+	// TODO: Use only one flag conf with a conf file that
+	// contains the following configuration, port, logfile, rulesfile, sizeofRotation
+	conf := *confFlag
+	c := &Config{}
+	pConf, err := c.LoadMainConfigFile(conf)
+	if err != nil {
+		errorLog.Println(err)
+		os.Exit(1)
+	}
+
+	p, err := strconv.Atoi(pConf.Port)
 	if err != nil {
 		errorLog.Println(err)
 		os.Exit(1)
@@ -105,41 +115,52 @@ func main() {
 		os.Exit(1)
 	}
 
-	var rulesFile string
-
-	if allSetFlags["config"] {
-		rulesFile = *rulesFileFlag
+	err = c.LoadMappingFile(pConf.RulesFp)
+	if err != nil {
+		errorLog.Println(err)
+		os.Exit(1)
 	}
-
-	var logFile string
-	if allSetFlags["logFile"] {
-		logFile = *logFileFlag
-	}
-
-	rFile, lFile, err := generateDefaults(logFile, rulesFile)
+	l, err := newFileLogger(pConf.LogFp, pConf.SizeToRotate)
 	if err != nil {
 		errorLog.Println(err)
 		os.Exit(1)
 	}
 
-	// load rules mapping
-	c := &Config{}
-	err = c.LoadMappingFile(rFile)
-	if err != nil {
-		errorLog.Println(err)
-		os.Exit(1)
-	}
-	l, err := newFileLogger(lFile)
-	if err != nil {
-		errorLog.Println(err)
-		os.Exit(1)
-	}
+	// var rulesFile string
+
+	// if allSetFlags["config"] {
+	// 	rulesFile = *rulesFileFlag
+	// }
+
+	// var logFile string
+	// if allSetFlags["logFile"] {
+	// 	logFile = *logFileFlag
+	// }
+
+	// rFile, lFile, err := generateDefaults(logFile, rulesFile)
+	// if err != nil {
+	// 	errorLog.Println(err)
+	// 	os.Exit(1)
+	// }
+
+	// // load rules mapping
+	// c := &Config{}
+	// err = c.LoadMappingFile(rFile)
+	// if err != nil {
+	// 	errorLog.Println(err)
+	// 	os.Exit(1)
+	// }
+	// l, err := newFileLogger(lFile)
+	// if err != nil {
+	// 	errorLog.Println(err)
+	// 	os.Exit(1)
+	// }
 
 	app := &Application{
 		Config: c,
 		Log:    l,
 	}
-	srv := app.Setup(port)
+	srv := app.Setup(pConf.Port)
 
 	// For graceful shutdowns
 	go func() {

testData/rules.json

@@ -0,0 +1,14 @@
+{
+	"mappings": [
+		{
+			"vanity_url":"scale.dev/x/migrate",
+			"protocol":"git",
+			"real_url":"https://github.com/scale/migrate"
+		},
+		{
+			"vanity_url":"localhost:7070/x/touche",
+			"protocol":"git",
+			"real_url":"https://github.com/mine/touche"
+		}
+	]
+}

testData/rules2.json

@@ -0,0 +1,19 @@
+{
+	"mappings": [
+		{
+			"vanity_url":"scale.dev/x/migrate",
+			"protocol":"git",
+			"real_url":"https://github.com/scale/migrate"
+		},
+		{
+			"vanity_url":"codeberg.org/woodpecker-plugins/plugin-gitea-release",
+			"protocol":"git",
+			"real_url":"https://codeberg.org/woodpecker-plugins/gitea-release"
+		},
+		{
+			"vanity_url":"localhost:7070/x/touche",
+			"protocol":"git",
+			"real_url":"https://github.com/mine/touche"
+		}
+	]
+}

testUtils_test.go

@@ -0,0 +1,65 @@
+package main
+
+import (
+	"io"
+	"os"
+	"testing"
+)
+
+func mkDirForTest(t *testing.T, fp string) {
+	err := os.MkdirAll(fp, os.ModePerm)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func cpFileForTest(t *testing.T, src string, dst string) {
+	var srcfd *os.File
+	var dstfd *os.File
+	var err error
+	var srcinfo os.FileInfo
+	srcfd, err = os.Open(src)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer srcfd.Close()
+	dstfd, err = os.Create(dst)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	defer dstfd.Close()
+	_, err = io.Copy(dstfd, srcfd)
+	if err != nil {
+		t.Fatal(err)
+	}
+	srcinfo, err = os.Stat(src)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = os.Chmod(dst, srcinfo.Mode())
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func writeForTest(t *testing.T, fp string, data []byte) {
+	err := os.WriteFile(fp, data, 0666)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func IsDirEmpty(t *testing.T, name string) bool {
+	f, err := os.Open(name)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+
+	// read in ONLY one file
+	_, err = f.Readdir(1)
+
+	// and if the file is EOF... well, the dir is empty.
+	return err == io.EOF
+}