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#!/usr/local/bin/python
import jinja2
import os
import sys
import subprocess
import glob
import codecs
# Utility functions
convert = lambda src, dst, environ: open(dst, "w").write(jinja2.Template(open(src).read()).render(**environ))
def check_arguments(environ, args):
for argument in args:
if argument not in environ:
print("Environment variable %s is mandatory, exiting." % argument)
sys.exit(2)
def generate_secrets(environ, secrets):
for name, secret in secrets.items():
if secret not in environ:
filename = "/data/%s.%s.key" % (environ["SYNAPSE_SERVER_NAME"], name)
if os.path.exists(filename):
with open(filename) as handle: value = handle.read()
else:
print("Generating a random secret for {}".format(name))
value = codecs.encode(os.urandom(32), "hex").decode()
with open(filename, "w") as handle: handle.write(value)
environ[secret] = value
# Prepare the configuration
mode = sys.argv[1] if len(sys.argv) > 1 else None
environ = os.environ.copy()
ownership = "{}:{}".format(environ.get("UID", 991), environ.get("GID", 991))
args = ["python", "-m", "synapse.app.homeserver"]
# In generate mode, generate a configuration, missing keys, then exit
if mode == "generate":
check_arguments(environ, ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS", "SYNAPSE_CONFIG_PATH"))
args += [
"--server-name", environ["SYNAPSE_SERVER_NAME"],
"--report-stats", environ["SYNAPSE_REPORT_STATS"],
"--config-path", environ["SYNAPSE_CONFIG_PATH"],
"--generate-config"
]
os.execv("/usr/local/bin/python", args)
# In normal mode, generate missing keys if any, then run synapse
else:
if "SYNAPSE_CONFIG_PATH" in environ:
config_path = environ["SYNAPSE_CONFIG_PATH"]
else:
check_arguments(environ, ("SYNAPSE_SERVER_NAME", "SYNAPSE_REPORT_STATS"))
generate_secrets(environ, {
"registration": "SYNAPSE_REGISTRATION_SHARED_SECRET",
"macaroon": "SYNAPSE_MACAROON_SECRET_KEY"
})
environ["SYNAPSE_APPSERVICES"] = glob.glob("/data/appservices/*.yaml")
if not os.path.exists("/compiled"): os.mkdir("/compiled")
config_path = "/compiled/homeserver.yaml"
convert("/conf/homeserver.yaml", config_path, environ)
convert("/conf/log.config", "/compiled/log.config", environ)
subprocess.check_output(["chown", "-R", ownership, "/data"])
args += [
"--config-path", config_path,
# tell synapse to put any generated keys in /data rather than /compiled
"--keys-directory", "/data",
]
# Generate missing keys and start synapse
subprocess.check_output(args + ["--generate-keys"])
os.execv("/sbin/su-exec", ["su-exec", ownership] + args)
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