add public function to remove old doc files

Signed-off-by: Guillaume Lours <705411+glours@users.noreply.github.com>

Author: glours

clidocstool.go

@@ -17,7 +17,9 @@ package clidocstool
 import (
 	"errors"
 	"io"
+	"io/fs"
 	"os"
+	"path/filepath"
 	"strings"
 
 	"github.com/spf13/cobra"
@@ -76,6 +78,40 @@ func (c *Client) GenAllTree() error {
 	return nil
 }
 
+// GenAllTreeAndRemoveOldFiles creates all structured ref files for this command and
+// all descendants in the directory given then removes potential old documentation files from the origin directory tree.
+func (c *Client) GenAllTreeAndRemoveOldFiles() error {
+	if err := c.GenAllTree(); err != nil {
+		return err
+	}
+	filesToRemove := make(map[string]any)
+	filepath.WalkDir(c.source, func(path string, entry fs.DirEntry, err error) error {
+		return c.checkIfShouldBeRemoved(filesToRemove, path, entry, err)
+	})
+	for file, _ := range filesToRemove {
+		if err := os.Remove(file); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (c *Client) checkIfShouldBeRemoved(filesToRemove map[string]any, path string, entry fs.DirEntry, err error) error {
+	if err != nil {
+		return err
+	}
+	if !entry.IsDir() {
+		if _, err := entry.Info(); err != nil {
+			return err
+		}
+		targetFile := filepath.Join(c.target, strings.ReplaceAll(path, c.source, ""))
+		if _, err := os.Stat(targetFile); os.IsNotExist(err) {
+			filesToRemove[path] = struct{}{}
+		}
+	}
+	return nil
+}
+
 func fileExists(f string) bool {
 	info, err := os.Stat(f)
 	if os.IsNotExist(err) {