add length to progress bar

so progress bar shows real progress

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

Author: xsuchy

CHANGELOG.rst

@@ -38,6 +38,9 @@ v33.0.0 (next next, roadmap)
 - Update Dockerfile and test container build.
   See https://github.com/aboutcode-org/scancode-toolkit/issues/3955
 
+- Progress bar now shows length. You can estimate the duration now.
+  See https://github.com/aboutcode-org/scancode-toolkit/issues/3342
+
 v32.3.1 - 2024-01-06
 --------------------
 

src/scancode/cli.py

@@ -1176,10 +1176,11 @@ def run_scanners(
 
     progress_manager = None
     if not quiet:
+        resources = list(((r.location, r.path) for r in codebase.walk() if r.is_file))
         echo_func(f'Scan files for: {scan_names} with {processes} process(es)...')
         item_show_func = partial(path_progress_message, verbose=verbose)
         progress_manager = partial(progressmanager,
-            item_show_func=item_show_func,
+            item_show_func=item_show_func, length=len(resources)*2,
             verbose=verbose, file=sys.stderr)
 
     # TODO: add CLI option to bypass cache entirely?