add length to progress bar

so progress bar shows real progress

Signed-off-by: Miroslav Suchý <msuchy@redhat.com>

Author: xsuchy

CHANGELOG.rst

@@ -108,6 +108,9 @@ This is a patch release with bugfixes and improvements::
   https://github.com/aboutcode-org/scancode-toolkit/pull/4476
 
 
+- Progress bar now shows length. You can estimate the duration now.
+  See https://github.com/aboutcode-org/scancode-toolkit/issues/3342
+
 v32.4.0 - 2025-06-26
 --------------------
 

src/scancode/cli.py

@@ -1264,6 +1264,8 @@ def scan_codebase(
 
     # NOTE: we never scan directories
     resources = ((r.location, r.path) for r in codebase.walk() if r.is_file)
+    if progress_manager:
+        resources = list(resources)
 
     use_threading = processes >= 0
     runner = partial(
@@ -1299,6 +1301,7 @@ def scan_codebase(
 
         if progress_manager:
             scans = progress_manager(scans)
+            scans.length = len(resources)
             # hack to avoid using a context manager
             if hasattr(scans, '__enter__'):
                 scans.__enter__()