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#!/usr/bin/env python3
import json
import os
from pathlib import Path
def run(input_path, apps_path, out_path):
default_command_flags = [
"--host",
"${host}",
"--port",
"${port}",
"--authKey",
"${secret}",
"--server",
]
default_ready_line = "App running at"
with open(input_path, "r") as rf:
input_dict = json.load(rf)
if not Path(apps_path).exists():
raise Exception(f"{apps_path} does not exist")
with open(apps_path, "r") as rf:
apps_dict = json.load(rf)
if not apps_dict:
raise Exception(f"{apps_path} is empty")
for app_name, config in apps_dict.items():
if "app" not in config and "cmd" not in config:
msg = (
f'In {apps_path}, every app must contain an "app" key '
f'if a "cmd" is not provided, but "{app_name}" does not'
)
raise Exception(msg)
if "cmd" in config and "args" in config:
msg = (
f'In {apps_path}, "args" and "cmd" cannot both be specified. '
'"args" is for appending extra args to the default "cmd", but '
'"cmd" is for overriding the command entirely. Error occurred '
f'in "{app_name}".'
)
raise Exception(msg)
default_cmd = [
config.get("app", "your_trame_app_package_name")
] + default_command_flags
cmd = config.get("cmd", default_cmd)
cmd += config.get("args", [])
ready_line = config.get("ready_line", default_ready_line)
input_dict.setdefault("apps", {})
input_dict["apps"][app_name] = {
"cmd": cmd,
"ready_line": ready_line,
}
if "trame" not in input_dict["apps"]:
# Make a copy of the first app and put it in PyWebVue, so that
# the default localhost:9000 web page will use that app.
first_key = next(iter(input_dict["apps"]))
input_dict["apps"]["trame"] = input_dict["apps"][first_key]
# Allow user to override launcher timeout via
# the TRAME_LAUNCHER_TIMEOUT environment variable
if "TRAME_LAUNCHER_TIMEOUT" in os.environ:
timeout = int(os.environ.get("TRAME_LAUNCHER_TIMEOUT", 25))
input_dict["configuration"]["timeout"] = timeout
with open(out_path, "w") as wf:
json.dump(input_dict, wf, indent=2)
if __name__ == "__main__":
default_input_path = "/opt/trame/default-launcher.json"
override_input_path = "/deploy/setup/launcher.json"
apps_path = "/opt/trame/apps.json"
out_path = "/deploy/server/launcher.json"
if Path(override_input_path).exists():
input_path = override_input_path
else:
input_path = default_input_path
run(input_path, apps_path, out_path)
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