cmd: new command lsf

fs/operations.go

@@ -11,6 +11,7 @@ import (
 	"mime"
 	"path"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"sync/atomic"
@@ -1784,3 +1785,66 @@ func MoveFile(fdst Fs, fsrc Fs, dstFileName string, srcFileName string) (err err
 func CopyFile(fdst Fs, fsrc Fs, dstFileName string, srcFileName string) (err error) {
 	return moveOrCopyFile(fdst, fsrc, dstFileName, srcFileName, true)
 }
+
+// ListFormat defines files information print format
+type ListFormat struct {
+	separator string
+	dirSlash  bool
+	output    []func() string
+	entry     DirEntry
+}
+
+// SetSeparator changes separator in struct
+func (l *ListFormat) SetSeparator(separator string) {
+	l.separator = separator
+}
+
+// SetDirSlash defines if slash should be printed
+func (l *ListFormat) SetDirSlash(dirSlash bool) {
+	l.dirSlash = dirSlash
+}
+
+// SetOutput sets functions used to create files information
+func (l *ListFormat) SetOutput(output []func() string) {
+	l.output = output
+}
+
+// AddModTime adds file's Mod Time to output
+func (l *ListFormat) AddModTime() {
+	l.AppendOutput(func() string { return l.entry.ModTime().Format("2006-01-02 15:04:05") })
+}
+
+// AddSize adds file's size to output
+func (l *ListFormat) AddSize() {
+	l.AppendOutput(func() string { return strconv.FormatInt(l.entry.Size(), 10) })
+}
+
+// AddPath adds path to file to output
+func (l *ListFormat) AddPath() {
+	l.AppendOutput(func() string {
+		_, isDir := l.entry.(Directory)
+
+		if isDir && l.dirSlash {
+			return l.entry.Remote() + "/"
+		}
+		return l.entry.Remote()
+	})
+}
+
+// AppendOutput adds string generated by specific function to printed output
+func (l *ListFormat) AppendOutput(functionToAppend func() string) {
+	if len(l.output) > 0 {
+		l.output = append(l.output, func() string { return l.separator })
+	}
+	l.output = append(l.output, functionToAppend)
+}
+
+// ListFormatted prints information about specific file in specific format
+func ListFormatted(entry *DirEntry, list *ListFormat) string {
+	list.entry = *entry
+	var out string
+	for _, fun := range list.output {
+		out += fun()
+	}
+	return out
+}

fs/operations_test.go

@@ -958,3 +958,45 @@ func TestCheckEqualReaders(t *testing.T) {
 	assert.Equal(t, myErr, err)
 	assert.Equal(t, differ, true)
 }
+
+func TestListFormat(t *testing.T) {
+	r := fstest.NewRun(t)
+	defer r.Finalise()
+	file1 := r.WriteObject("a", "a", t1)
+	file2 := r.WriteObject("subdir/b", "b", t1)
+
+	fstest.CheckItems(t, r.Fremote, file1, file2)
+
+	items, _ := fs.ListDirSorted(r.Fremote, true, "")
+	var list fs.ListFormat
+	list.AddPath()
+	list.SetDirSlash(false)
+	assert.Equal(t, "subdir", fs.ListFormatted(&items[1], &list))
+
+	list.SetDirSlash(true)
+	assert.Equal(t, "subdir/", fs.ListFormatted(&items[1], &list))
+
+	list.SetOutput(nil)
+	assert.Equal(t, "", fs.ListFormatted(&items[1], &list))
+
+	list.AppendOutput(func() string { return "a" })
+	list.AppendOutput(func() string { return "b" })
+	assert.Equal(t, "ab", fs.ListFormatted(&items[1], &list))
+	list.SetSeparator(":::")
+	assert.Equal(t, "a:::b", fs.ListFormatted(&items[1], &list))
+
+	list.SetOutput(nil)
+	list.AddModTime()
+	assert.Equal(t, items[0].ModTime().Format("2006-01-02 15:04:05"), fs.ListFormatted(&items[0], &list))
+
+	list.SetOutput(nil)
+	list.AddSize()
+	assert.Equal(t, "1", fs.ListFormatted(&items[0], &list))
+
+	list.AddPath()
+	list.AddModTime()
+	list.SetDirSlash(true)
+	list.SetSeparator("__SEP__")
+	assert.Equal(t, "1__SEP__a__SEP__"+items[0].ModTime().Format("2006-01-02 15:04:05"), fs.ListFormatted(&items[0], &list))
+	assert.Equal(t, "-1__SEP__subdir/__SEP__"+items[1].ModTime().Format("2006-01-02 15:04:05"), fs.ListFormatted(&items[1], &list))
+}