D2470.id.diff
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	diff --git a/phabricator/read-token.py b/phabricator/read-token.py
	new file mode 100755
	--- /dev/null
	+++ b/phabricator/read-token.py
	@@ -0,0 +1,59 @@
	+#!/usr/bin/env python3
	+
	+
	+import json
	+import os
	+import sys
	+
	+
	+# -------------------------------------------------------------
	+# Parse Phabricator configuration
	+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	+
	+def get_phabricator_configuration_path():
	+ candidates = [
	+ os.environ["HOME"] + "/.arcrc",
	+ "/usr/local/etc/arcrc",
	+ "/etc/arcrc",
	+ ]
	+
	+ for candidate in candidates:
	+ if os.path.exists(candidate):
	+ return candidate
	+
	+ raise FileNotFoundError("Can't find Arc configuration")
	+
	+
	+def get_token(phabricator_url):
	+ config_path = get_phabricator_configuration_path()
	+
	+ with open(config_path) as fd:
	+ config = json.load(fd)
	+
	+ for instance, args in config.get("hosts", {}).items():
	+ if phabricator_url in instance:
	+ return args["token"]
	+
	+ raise RuntimeError(
	+ f"{config_path} doesn't describe host {phabricator_url}")
	+
	+
	+# -------------------------------------------------------------
	+# Application entry point
	+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	+
	+
	+def run(phabricator_url):
	+ token = get_token(phabricator_url)
	+ print(token)
	+
	+
	+if __name__ == "__main__":
	+ try:
	+ phabricator_url_fragment = sys.argv[1]
	+ except IndexError:
	+ print("Usage:", sys.argv[0],
	+ "<Phabricator instance URL>", file=sys.stderr)
	+ sys.exit(2)
	+
	+ run(phabricator_url_fragment)