fix: Add ModTime to fileListEntry and consider it when extracting

Author: codablock

embed_util/embedded_files.go

@@ -9,6 +9,7 @@ import (
 	"io/fs"
 	"os"
 	"path/filepath"
+	"time"
 )
 
 type EmbeddedFiles struct {
@@ -128,7 +129,7 @@ func (e *EmbeddedFiles) copyEmbeddedFilesToTmp(embedFs fs.FS, fl *fileList) erro
 			if resolvedFle.Mode.Type() == existingSt.Mode().Type() {
 				if resolvedFle.Mode.IsDir() {
 					continue
-				} else if existingSt.Size() == resolvedFle.Size {
+				} else if existingSt.Size() == resolvedFle.Size && existingSt.ModTime().Unix() == resolvedFle.ModTime {
 					// unchanged
 					continue
 				}
@@ -176,6 +177,12 @@ func (e *EmbeddedFiles) copyEmbeddedFilesToTmp(embedFs fs.FS, fl *fileList) erro
 		if err != nil {
 			return err
 		}
+		if !resolvedFle.Mode.IsDir() {
+			err = os.Chtimes(path, time.Time{}, time.Unix(resolvedFle.ModTime, 0))
+			if err != nil {
+				return err
+			}
+		}
 	}
 
 	return nil

embed_util/file_list.go

@@ -20,6 +20,7 @@ type fileList struct {
 type fileListEntry struct {
 	Name       string      `json:"name"`
 	Size       int64       `json:"size"`
+	ModTime    int64       `json:"modTime"`
 	Mode       fs.FileMode `json:"perm"`
 	Symlink    string      `json:"symlink,omitempty"`
 	Compressed bool        `json:"compressed,omitempty"`
@@ -48,9 +49,10 @@ func buildFileListFromDir(dir string) (*fileList, error) {
 		}
 
 		fle := fileListEntry{
-			Name: relPath,
-			Size: info.Size(),
-			Mode: info.Mode(),
+			Name:    relPath,
+			Size:    info.Size(),
+			ModTime: info.ModTime().Unix(),
+			Mode:    info.Mode(),
 		}
 
 		if info.Mode().Type() == fs.ModeSymlink {
@@ -92,15 +94,17 @@ func buildFileListFromFs(embedFs fs.FS) (*fileList, error) {
 		}
 
 		fle := fileListEntry{
-			Name: path,
-			Size: info.Size(),
-			Mode: info.Mode() | 0o600,
+			Name:    path,
+			Size:    info.Size(),
+			ModTime: info.ModTime().Unix(),
+			Mode:    info.Mode() | 0o600,
 		}
 
 		if info.Mode().Type() == fs.ModeSymlink {
 			return fmt.Errorf("symlink not supported in buildFileListFromFs")
 		} else if info.Mode().IsDir() {
 			fle.Size = 0
+			fle.ModTime = 0
 		}
 
 		fl.Files = append(fl.Files, fle)