bin/resolve-hash
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	#!/usr/bin/env python3

	# -------------------------------------------------------------
	# Resolve a hash
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	# Project: Nasqueron
	# Description: Query sources like Phabricator to find a known
	# hash and return if found an URL representation.
	# This is intended to resolve Git hash.
	# License: Trivial work, not eligible to copyright
	# -------------------------------------------------------------


	import json
	import os
	import requests
	import sys


	# -------------------------------------------------------------
	# Phabricator
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


	def call_phabricator_api(api_url, token, method, parameters):
	parameters["api.token"] = token

	r = requests.post(api_url + method, data=parameters)
	if r.status_code != 200:
	return None

	result = r.json()["result"]
	if result is None:
	return None

	return result["data"]


	def query_phabricator_instance(api_url, token, commit_hash):
	result = call_phabricator_api(
	api_url,
	token,
	"diffusion.commit.search",
	{"constraints[identifiers][0]": commit_hash}
	)

	if result is None:
	return None

	try:
	commit = result[0]
	except IndexError:
	# Query works but didn't found anything
	return None

	return resolve_phabricator_commit_url(api_url, token, commit_hash, commit["fields"]["repositoryPHID"])


	def resolve_phabricator_commit_url(api_url, token, commit_hash, repositoryPhid):
	callsign = query_get_repository_callsign(api_url, token, repositoryPhid)

	return api_url.replace("api/", "") + callsign + commit_hash


	def query_get_repository_callsign(api_url, token, repositoryPhid):
	result = call_phabricator_api(
	api_url,
	token,
	"diffusion.repository.search",
	{"constraints[phids][0]": repositoryPhid}
	)

	return "r" + result[0]["fields"]["callsign"]


	def query_phabricator_instances(hash):
	with open(os.environ["HOME"] + "/.arcrc", "r") as fd:
	instances = json.load(fd)

	for api_url, args in instances["hosts"].items():
	url = query_phabricator_instance(api_url, args["token"], hash)
	if url is not None:
	return url

	return None


	# -------------------------------------------------------------
	# Application entry point
	# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


	def run(hash):
	# Strategy I. Query Phabricator diffusion.commit.search
	result = query_phabricator_instances(hash)

	if result is not None:
	print(result)
	sys.exit(0)

	# Nothing found
	sys.exit(1)


	if __name__ == "__main__":
	argc = len(sys.argv)

	if argc < 2:
	print(f"Usage: {sys.argv[0]} <hash>", file=sys.stderr)
	sys.exit(1)

	run(sys.argv[1])

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	dereckson
	Mar 5 2022, 14:50

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