fix split files

Signed-off-by: Austin Abro <[email protected]>

src/internal/packager2/layout/create.go

@@ -953,7 +953,7 @@ func splitFile(srcPath string, chunkSize int) (err error) {
 	//   iteration as soon as we're done writing.
 	for {
 		path := fmt.Sprintf("%s.part%03d", srcPath, fileCount+1)
-		dstFile, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, helpers.ReadAllWriteUser)
+		dstFile, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR|os.O_TRUNC, helpers.ReadAllWriteUser)
 		if err != nil {
 			return err
 		}

src/internal/packager2/layout/package.go

@@ -224,7 +224,18 @@ func (p *PackageLayout) Archive(ctx context.Context, dirPath string, maxPackageS
 		if fi.Size()/int64(chunkSize) > 999 {
 			return fmt.Errorf("unable to split the package archive into multiple files: must be less than 1,000 files")
 		}
-		err := splitFile(tarballPath, chunkSize)
+		// Remove any existing split files
+		existingChunks, err := filepath.Glob(tarballPath + ".part*")
+		if err != nil {
+			return err
+		}
+		for _, chunk := range existingChunks {
+			err := os.Remove(chunk)
+			if err != nil {
+				return fmt.Errorf("unable to remove existing chunk file %s: %w", chunk, err)
+			}
+		}
+		err = splitFile(tarballPath, chunkSize)
 		if err != nil {
 			return fmt.Errorf("unable to split the package archive into multiple files: %w", err)
 		}