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provision: Add caching of virtualenvs by sha1sum of requirements.txt.

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This should save a couple minutes on the time it takes to provision a
Zulip environment on a machine that has provisioned with the same
requirements.txt file content before.

We can't yet use this in Travis CI because Travis CI doesn't support
using both sudo and caching in the same build.
This commit is contained in:
Tim Abbott
2016-05-02 18:12:34 -07:00
parent ef95917da5
commit 9f786a5131
1 changed files with 16 additions and 1 deletions
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17
provision.py
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@@ -104,7 +104,22 @@ REPO_STOPWORDS_PATH = os.path.join(
LOUD = dict(_out=sys.stdout, _err=sys.stderr)
def setup_virtualenv(venv_path, requirements_file, virtualenv_args=[]):
def setup_virtualenv(target_venv_path, requirements_file, virtualenv_args=[]):
# Check if a cached version already exists
output = subprocess.check_output(['sha1sum', requirements_file])
sha1sum = output.split()[0]
cached_venv_path = os.path.join("/srv/zulip-venv-cache/", sha1sum, os.path.basename(target_venv_path))
success_stamp = os.path.join(cached_venv_path, "success-stamp")
if not os.path.exists(success_stamp):
do_setup_virtualenv(cached_venv_path, requirements_file, virtualenv_args)
run(["sudo", "touch", success_stamp])
print("Using cached Python venv from %s" % (cached_venv_path,))
run(["sudo", "ln", "-nsf", cached_venv_path, target_venv_path])
activate_this = os.path.join(target_venv_path, "bin", "activate_this.py")
execfile(activate_this, dict(__file__=activate_this))
def do_setup_virtualenv(venv_path, requirements_file, virtualenv_args):
# Setup Python virtualenv
run(["sudo", "rm", "-rf", venv_path])
run(["sudo", "mkdir", "-p", venv_path])