Do not use progress bars in non-interactive runs (#58)

news/58-progress-bars

@@ -0,0 +1,19 @@
+### Enhancements
+
+* Do not render extraction progress bars in non-interactive runs or when `CONDA_QUIET` is set to a truthy value. (#58)
+
+### Bug fixes
+
+* <news item>
+
+### Deprecations
+
+* <news item>
+
+### Docs
+
+* <news item>
+
+### Other
+
+* <news item>

src/entry_point.py

@@ -143,6 +143,7 @@ def _constructor_extract_conda_pkgs(prefix, max_workers=None):
     from concurrent.futures import ProcessPoolExecutor
 
     import tqdm
+    from conda.auxlib.type_coercion import boolify
     from conda.base.constants import CONDA_PACKAGE_EXTENSIONS
     from conda_package_handling import api
 
@@ -155,7 +156,11 @@ def _constructor_extract_conda_pkgs(prefix, max_workers=None):
             if pkg.endswith(ext):
                 fn = os.path.join(os.getcwd(), pkg)
                 flist.append(fn)
-    with tqdm.tqdm(total=len(flist), leave=False) as t:
+    if boolify(os.environ.get("CONDA_QUIET")):
+        disabled = True
+    else:
+        disabled = None  # only for non-tty
+    with tqdm.tqdm(total=len(flist), leave=False, disable=disabled) as t:
         for fn, _ in zip(flist, executor.map(api.extract, flist)):
             t.set_description("Extracting : %s" % os.path.basename(fn))
             t.update()