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restart-server: Warn if the shell’s PWD goes through an updated symlink. 

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
This commit is contained in:
Anders Kaseorg 2019-09-19 17:23:23 -07:00 committed by Tim Abbott
parent a4ababb9a4
commit 8d91bebf95
1 changed files with 19 additions and 2 deletions
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21
scripts/restart-server
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@ -7,9 +7,10 @@ import pwd
import subprocess
import logging
import time
import shlex
sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
from scripts.lib.zulip_tools import ENDC, OKGREEN, DEPLOYMENTS_DIR, overwrite_symlink
from scripts.lib.zulip_tools import ENDC, OKGREEN, WARNING, DEPLOYMENTS_DIR, overwrite_symlink
logging.Formatter.converter = time.gmtime
logging.basicConfig(format="%(asctime)s restart-server: %(message)s",
@ -40,7 +41,8 @@ if os.path.exists("/etc/supervisor/conf.d/thumbor.conf"):
current_symlink = os.path.join(DEPLOYMENTS_DIR, "current")
last_symlink = os.path.join(DEPLOYMENTS_DIR, "last")
if os.readlink(current_symlink) != deploy_path:
change_symlink = os.readlink(current_symlink) != deploy_path
if change_symlink:
overwrite_symlink(os.readlink(current_symlink), last_symlink)
overwrite_symlink(deploy_path, current_symlink)
@ -83,3 +85,18 @@ if os.path.exists("/etc/supervisor/conf.d/zulip_db.conf"):
logging.info("Done!")
print(OKGREEN + "Application restarted successfully!" + ENDC)
if change_symlink and "PWD" in os.environ:
for symlink in [last_symlink, current_symlink]:
if os.path.commonprefix([os.environ["PWD"], symlink]) == symlink:
print(
"""
%sYour shell entered its current directory through a symlink:
%s
which has now changed. Your shell will not see this change until you run:
cd %s
to traverse the symlink again.%s
"""
% (WARNING, symlink, shlex.quote(os.environ["PWD"]), ENDC),
file=sys.stderr,
)