setup_path_on_import: Replace with setup_path function.

isort 5 knows not to reorder imports across function calls, so this
will stop isort from breaking our code.

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

docs/subsystems/dependencies.md

@@ -184,8 +184,8 @@ highlighting.  The system is largely managed by the code in
   amounts of disk over time.
 * **Scripts**.  Often, we want a script running in production to use
   the Zulip virtualenv.  To make that work without a lot of duplicated
-  code, we have a helpful library,
+  code, we have a helpful function,
-  `scripts/lib/setup_path_on_import.py`, which on import will put the
+  `scripts.lib.setup_path.setup_path`, which on import will put the
   currently running Python script into the Zulip virtualenv.  This is
   called by `./manage.py` to ensure that our Django code always uses
   the correct virtualenv as well.

manage.py

@@ -10,7 +10,10 @@ if sys.version_info <= (3, 0):
 
 BASE_DIR = os.path.dirname(os.path.abspath(__file__))
 sys.path.append(BASE_DIR)
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
+
 from scripts.lib.zulip_tools import assert_not_running_as_root
 
 if __name__ == "__main__":

puppet/zulip/files/nagios_plugins/zulip_app_frontend/check_send_receive_time

@@ -17,7 +17,9 @@ import os
 
 sys.path.append('.')
 sys.path.append('/home/zulip/deployments/current')
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
 
 import django
 

puppet/zulip/files/nagios_plugins/zulip_postgres_appdb/check_fts_update_log

@@ -6,7 +6,9 @@ Nagios plugin to check the length of the FTS update log.
 import sys
 sys.path.append('/home/zulip/deployments/current')
 try:
-    import scripts.lib.setup_path_on_import
+    from scripts.lib.setup_path import setup_path
+
+    setup_path()
 except ImportError:
     pass
 

puppet/zulip/files/postgresql/process_fts_updates

@@ -9,14 +9,16 @@
 import sys
 
 # We want to use a virtualenv in production, which will be in /home/zulip/deployments/current.
-# So we should add that path to sys.path and then import scripts.lib.setup_path_on_import.
+# So we should add that path to sys.path and then call setup_path.
 # But this file is also used in development, where the above path will not exist.
-# So `import scripts.lib.setup_path_on_import` will raise an ImportError.
+# So `from scripts.lib.setup_path import setup_path` will raise an ImportError.
 # In development, we just want to skip this step since we know that virtualenv will already be in use.
 # So catch the ImportError and do nothing.
 sys.path.append('/home/zulip/deployments/current')
 try:
-    import scripts.lib.setup_path_on_import
+    from scripts.lib.setup_path import setup_path
+
+    setup_path()
 except ImportError:
     pass
 

puppet/zulip_ops/files/nagios_plugins/zulip_zephyr_mirror/check_user_zephyr_mirror_liveness

@@ -11,7 +11,9 @@ import os
 import sys
 
 sys.path.append('/home/zulip/deployments/current')
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
 
 import django
 from django.utils.timezone import now as timezone_now

scripts/get-django-setting

@@ -4,7 +4,9 @@ import sys
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.append(BASE_DIR)
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
 
 os.environ['DJANGO_SETTINGS_MODULE'] = 'zproject.settings'
 from django.conf import settings

scripts/lib/queue_workers.py

@@ -6,7 +6,9 @@ import sys
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.append(BASE_DIR)
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
 
 os.environ['DJANGO_SETTINGS_MODULE'] = 'zproject.settings'
 

scripts/lib/setup_path.py

@@ -0,0 +1,16 @@
+"""
+Use libraries from a virtualenv (by modifying sys.path) in production.
+"""
+
+import os
+import sys
+
+def setup_path() -> None:
+    if os.path.basename(sys.prefix) != "zulip-py3-venv":
+        BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+        venv = os.path.join(BASE_DIR, "zulip-py3-venv")
+        activate_this = os.path.join(venv, "bin", "activate_this.py")
+        activate_locals = dict(__file__=activate_this)
+        exec(open(activate_this).read(), activate_locals)
+        if not os.path.exists(activate_locals["site_packages"]):
+            raise RuntimeError(venv + " was not set up for this Python version")

scripts/lib/setup_path_on_import.py

@@ -1,15 +0,0 @@
-"""
-Use libraries from a virtualenv (by modifying sys.path) in production.
-"""
-
-import os
-import sys
-
-if os.path.basename(sys.prefix) != "zulip-py3-venv":
-    BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
-    venv = os.path.join(BASE_DIR, "zulip-py3-venv")
-    activate_this = os.path.join(venv, "bin", "activate_this.py")
-    activate_locals = dict(__file__=activate_this)
-    exec(open(activate_this).read(), activate_locals)
-    if not os.path.exists(activate_locals["site_packages"]):
-        raise RuntimeError(venv + " was not set up for this Python version")

scripts/setup/flush-memcached

@@ -6,7 +6,10 @@ import sys
 BASE_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), "../..")
 sys.path.append(BASE_DIR)
 
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
+
 from zproject import settings
 import pylibmc
 

scripts/setup/generate_secrets.py

@@ -8,7 +8,9 @@ from typing import Dict, List
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
 sys.path.append(BASE_DIR)
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
 
 os.environ['DJANGO_SETTINGS_MODULE'] = 'zproject.settings'
 

scripts/setup/restore-backup

@@ -24,7 +24,9 @@ def restore_backup(tarball_file):
 
     su_to_zulip(save_suid=True)
 
-    import scripts.lib.setup_path_on_import
+    from scripts.lib.setup_path import setup_path
+
+    setup_path()
 
     # First, we unpack the /etc/zulip configuration, so we know how
     # this server is supposed to be configured (and can import

tools/linter_lib/pyflakes.py

@@ -12,7 +12,6 @@ def check_pyflakes(files, options):
     # type: (List[str], argparse.Namespace) -> bool
     suppress_patterns = [
         ("scripts/lib/pythonrc.py", "imported but unused"),
-        ('', "'scripts.lib.setup_path_on_import' imported but unused"),
         # Intentionally imported by zerver/lib/webhooks/common.py
         ('', "'zerver.lib.exceptions.UnexpectedWebhookEventType' imported but unused"),
 

tools/update-prod-static

@@ -9,7 +9,10 @@ import sys
 
 # We need settings so we can figure out where the prod-static directory is.
 sys.path.insert(0, os.path.join(os.path.dirname(__file__), '..'))
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
+
 os.environ['DJANGO_SETTINGS_MODULE'] = 'zproject.settings'
 from django.conf import settings
 from scripts.lib.node_cache import setup_node_modules

zproject/wsgi.py

@@ -18,7 +18,9 @@ import sys
 
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 sys.path.append(BASE_DIR)
-import scripts.lib.setup_path_on_import
+from scripts.lib.setup_path import setup_path
+
+setup_path()
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "zproject.settings")