2 files changed, 32 insertions(+), 2 deletions(-)

M doc/lutil-fmt.1.scd
M fmt/fmt.go

@@ 12,7 12,9 @@ lutil-fmt - format ledger files
 
 *lutil fmt* formats ledger files, similar to *gofmt*. By default it reads the
 files specified in _filenames_ and prints formatted contents of each file to
-stdout. If no filename is given, stdin is read instead.
+stdout. If no filename is given, stdin is read instead. Directories are
+traversed recursively. Ledger files are identified by the suffix .leg. Hidden
+files are ignored
 
 Flags and filenames can be mixed. *lutil fmt* will continue to interpret flags
 until a flag separator (--) is encountered.

@@ 13,9 13,11 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
+	"log"
 	"os"
 	"path/filepath"
 	"regexp"
+	"strings"
 
 	"github.com/spf13/pflag"
 )


@@ 44,7 46,18 @@ func RunFmt() {
 		processFile("<standard input>", os.Stdin, os.Stdout)
 	} else {
 		for _, file := range pflag.Args() {
-			processFile(file, nil, os.Stdout)
+			switch info, err := os.Stat(file); {
+			case err != nil:
+				log.Printf("could not access \"%s\": %v", file, err)
+			case !info.IsDir():
+				if err := processFile(file, nil, os.Stdout); err != nil {
+					log.Printf("could not process \"%s\": %v", file, err)
+				}
+			default:
+				if err := filepath.WalkDir(file, visitFile); err != nil {
+					log.Printf("error during file system walk for \"%s\": %v", file, err)
+				}
+			}
 		}
 	}
 }


@@ 144,6 157,21 @@ func format(in []byte) ([]byte, error) {
 	return b.Bytes(), nil
 }
 
+func visitFile(path string, f fs.DirEntry, err error) error {
+	if err != nil || !isLedgerFile(f) {
+		return err
+	}
+	if err := processFile(path, nil, os.Stdout); err != nil {
+		log.Printf("error processing \"%s\": %v", path, err)
+	}
+	return nil
+}
+
+func isLedgerFile(f fs.DirEntry) bool {
+	filename := f.Name()
+	return !f.IsDir() && !strings.HasPrefix(filename, ".") && strings.HasSuffix(filename, ".leg")
+}
+
 func backupFile(name string, content []byte, perm fs.FileMode) (string, error) {
 	f, err := os.CreateTemp(filepath.Dir(name), filepath.Base(name))
 	if err != nil {