Fix create archive to a continuous writing source file failed (#388)

* Fix create archive to a continuous writing source file failed #387 Signed-off-by: Yan Zhu <[email protected]> * Update archiver.go --------- Signed-off-by: Yan Zhu <[email protected]> Co-authored-by: Matt Holt <[email protected]>
mholt · Dec 13, 2023 · 09bbccc · 09bbccc
1 parent aa12f39
commit 09bbccc
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/archiver.go b/archiver.go
@@ -221,8 +221,14 @@ func openAndCopyFile(file File, w io.Writer) error {
 		return err
 	}
 	defer fileReader.Close()
-	_, err = io.Copy(w, fileReader)
-	return err
+	// When file is in use and size is being written to, creating the compressed
+	// file will fail with "archive/tar: write too long." Using CopyN gracefully
+	// handles this.
+	_, err = io.CopyN(w, fileReader, file.Size())
+	if err != nil && err != io.EOF {
+		return err
+	}
+	return nil
 }
 
 // fileIsIncluded returns true if filename is included according to