Sorting now supports arbitrary numbering length, so long as it is sequential

README.md

@@ -38,7 +38,7 @@ You can also provide a comma-delimited string of alphanumeric patterns to exclud
 
 Filenames matching any of these patterns will not be served.
 
-You can also combine these two parameters, with exclusions taking priority over inclusions.
+You can combine these two parameters, with exclusions taking priority over inclusions.
 
 Both filtering parameters ignore the file extension and full path; they only compare against the bare filename.
 
@@ -77,7 +77,7 @@ Enjoy!
 
 ## Sorting
 
-You can specify a sorting pattern via the `sort=` query parameter, assuming the `-s|--sort` flag is enabled.
+You can specify a sorting direction via the `sort=` query parameter, assuming the `-s|--sort` flag is enabled.
 
 A value of `sort=asc` means files will be served in ascending order (lowest-numbered to highest).
 
@@ -95,7 +95,7 @@ For `sort=desc`, the highest-numbered file will be served instead.
 
 If any other (or no) value is provided, the selected file will be random.
 
-Note: These patterns require sequentially-numbered files matching the following pattern: `filename###.extension`.
+Note: These options require sequentially-numbered files matching the following pattern: `filename[0-9]*.extension`.
 
 ## Themes
 The `--code` handler provides syntax highlighting via [alecthomas/chroma](https://github.com/alecthomas/chroma).

cmd/files.go

@@ -42,16 +42,30 @@ type scanStatsChannels struct {
 
 type splitPath struct {
 	base      string
-	number    int
+	number    string
 	extension string
 }
 
 func (splitPath *splitPath) increment() {
-	splitPath.number = splitPath.number + 1
+	length := len(splitPath.number)
+
+	asInt, err := strconv.Atoi(splitPath.number)
+	if err != nil {
+		return
+	}
+
+	splitPath.number = fmt.Sprintf("%0*d", length, asInt+1)
 }
 
 func (splitPath *splitPath) decrement() {
-	splitPath.number = splitPath.number - 1
+	length := len(splitPath.number)
+
+	asInt, err := strconv.Atoi(splitPath.number)
+	if err != nil {
+		return
+	}
+
+	splitPath.number = fmt.Sprintf("%0*d", length, asInt-1)
 }
 
 func humanReadableSize(bytes int) string {
@@ -85,26 +99,22 @@ func kill(path string, cache *fileCache) error {
 	return nil
 }
 
-func split(path string, regexes *regexes) (*splitPath, error) {
+func split(path string, regexes *regexes) (*splitPath, int, error) {
 	p := splitPath{}
-	var err error
 
 	split := regexes.filename.FindAllStringSubmatch(path, -1)
 
 	if len(split) < 1 || len(split[0]) < 3 {
-		return &splitPath{}, nil
+		return &splitPath{}, 0, nil
 	}
 
 	p.base = split[0][1]
 
-	p.number, err = strconv.Atoi(split[0][2])
-	if err != nil {
-		return &splitPath{}, err
-	}
+	p.number = split[0][2]
 
 	p.extension = split[0][3]
 
-	return &p, nil
+	return &p, len(p.number), nil
 }
 
 func newFile(list []string, sortOrder string, regexes *regexes, formats *types.Types) (string, error) {
@@ -113,15 +123,16 @@ func newFile(list []string, sortOrder string, regexes *regexes, formats *types.T
 		return "", err
 	}
 
-	splitPath, err := split(path, regexes)
+	if sortOrder == "asc" || sortOrder == "desc" {
+		splitPath, length, err := split(path, regexes)
 		if err != nil {
 			return "", err
 		}
 
-	splitPath.number = 1
-
 		switch {
 		case sortOrder == "asc":
+			splitPath.number = fmt.Sprintf("%0*d", length, 1)
+
 			path, err = tryExtensions(splitPath, formats)
 			if err != nil {
 				return "", err
@@ -147,12 +158,13 @@ func newFile(list []string, sortOrder string, regexes *regexes, formats *types.T
 				}
 			}
 		}
+	}
 
 	return path, nil
 }
 
 func nextFile(filePath, sortOrder string, regexes *regexes, formats *types.Types) (string, error) {
-	splitPath, err := split(filePath, regexes)
+	splitPath, _, err := split(filePath, regexes)
 	if err != nil {
 		return "", err
 	}
@@ -178,7 +190,7 @@ func tryExtensions(splitPath *splitPath, formats *types.Types) (string, error) {
 	var path string
 
 	for extension := range formats.Extensions {
-		path = fmt.Sprintf("%s%.3d%s", splitPath.base, splitPath.number, extension)
+		path = fmt.Sprintf("%s%s%s", splitPath.base, splitPath.number, extension)
 
 		exists, err := fileExists(path)
 		if err != nil {

cmd/root.go

@@ -12,7 +12,7 @@ import (
 )
 
 const (
-	ReleaseVersion string = "0.96.5"
+	ReleaseVersion string = "0.97.0"
 )
 
 var (

cmd/web.go

@@ -460,7 +460,7 @@ func ServePage(args []string) error {
 	}
 
 	regexes := &regexes{
-		filename:     regexp.MustCompile(`(.+)([0-9]{3})(\..+)`),
+		filename:     regexp.MustCompile(`(.+?)([0-9]*)(\..+)`),
 		alphanumeric: regexp.MustCompile(`^[A-z0-9]*$`),
 	}