fix: prune stopped containers after build

bioconda_utils/build.py

@@ -494,6 +494,9 @@ def build_recipes(recipe_folder: str, config_path: str, recipes: List[str],
         # remove traces of the build
         if not keep_old_work:
             conda_build_purge()
+            # prune stopped containers
+            if docker_builder is not None:
+                docker_utils.pruneStoppedContainers()
 
     if failed or failed_uploads:
         logger.error('BUILD SUMMARY: of %s recipes, '
@@ -525,4 +528,4 @@ def report_resources(message, show_docker=True):
     logger.info("{0} Free disk space: {1:.2f} MB. Free memory: {2:.2f} MB ({3:.2f}%)".format(message, free_space_mb, free_mem_mb, free_mem_percent))
     if show_docker:
         cmd = ['docker', 'system', 'df']
-        utils.run(cmd, mask=False, live=True)
+        utils.run(cmd, mask=False, live=True)

bioconda_utils/docker_utils.py

@@ -490,3 +490,8 @@ def purgeImage(mulled_upload_target, img):
     pkg_container_image = f"quay.io/{mulled_upload_target}/{pkg_name}:{pkg_version}--{pkg_build_string}"
     cmd = ['docker', 'rmi', pkg_container_image]
     o = utils.run(cmd, mask=False)
+
+
+def pruneStoppedContainers():
+    cmd = ['docker', 'container', 'prune', '-f']
+    utils.run(cmd, mask=False)