noredink-ui/script/check-exposed.py

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#!/usr/bin/env python3
#
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# Checks that `elm.json` contains an `exposed-modules` entry for every
# module in `src/Nri` (recursively) named `Vn.elm`, where `n` is a decimal
# number.
#
# On success, this emits nothing and exits 0.
#
# On failure, this emits a list of those modules not exposed, and exits 2.
#
import json
import os
import re
import sys
re_v_file = re.compile(r"^V[0-9]+[.]elm$")
re_module = re.compile(
r"""
# Zero or more blank lines or single-line comments.
(?:^$\n|^--.*$\n)*
# Optional port or effect modifier.
^(?:(?:port|effect)\s+)?
# The module declaration itself begins.
module
# Optional newline, comment, newline.
(?:\n\s+--.+\n)?
# After some whitespace, capture the module name.
\s+(?P<module>[^ ]+)\b
""",
flags=re.MULTILINE | re.VERBOSE)
def p_v_file(filename):
"""Is `filename` a versioned widget file?"""
return re_v_file.match(filename) is not None
def read_module(filename):
"""Read the module name from the Elm source."""
with open(filename, "r", encoding="utf-8") as elm:
return re_module.search(elm.read()).group("module")
def find_v_modules(root):
for dirname, dirnames, filenames in os.walk(root + "/Nri"):
filenames = filter(p_v_file, filenames)
filepaths = (os.path.join(dirname, filename) for filename in filenames)
yield from map(read_module, filepaths)
def read_exposed_modules(path):
with open(path, "r", encoding="utf-8") as pkg:
yield from json.load(pkg).get("exposed-modules")
if __name__ == "__main__":
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available = set(find_v_modules("src"))
exposed = set(read_exposed_modules("elm.json"))
missing = available - exposed
for module in sorted(missing):
print("Not exposed:", module, file=sys.stderr)
raise SystemExit(
0 if len(missing) == 0 else 2)