find-exposing-stuff.py

#!/usr/bin/env python3
#
# To produce a report, run like so:
#
#   $ ./this-script.py ui/src ui/tests | \
#   >   cut -f 1 | sort | uniq -c | sort -k 2
#

from pathlib import Path
import re
import sys


re_exposing_dotdot = re.compile(
    '^((?:port\s+|effect\s+)?module|import)\s+.*?\s+exposing\s*[(][.][.][)]',
    re.MULTILINE)


def report(classification, filepath):
    print(f"{classification}\t{filepath}")


if __name__ == '__main__':
    for directory in sys.argv[1:]:
        dirpath = Path(directory)
        for filepath in dirpath.rglob("*.elm"):
            contents = filepath.read_text("utf-8")
            module, imports = False, []
            for match in re_exposing_dotdot.finditer(contents):
                if match.group(1) == 'import':
                    imports.append(match.group(0))
                else:
                    assert not module, "Multiple module decls: " + filepath
                    module = True
            if module and len(imports) >= 1:
                report("module-and-imports", filepath)
            elif module:
                report("module", filepath)
            elif len(imports) >= 2:
                report("imports-multiple", filepath)
            elif len(imports) == 1:
                report("imports-once", filepath)
            else:
                report("okay", filepath)