#!/usr/bin/env python3

# This script generates a bazel-compatible list of files `filelist.bzl` from `filelist`.

import pprint

filelist_bzl = "filelist.bzl"

platform2files = {}
with open("filelist") as f:
    for a in [l.split() for l in f if l != "\n" and not l.startswith("#")]:
        file, platform = a[0], f"WT_FILELIST_{a[1]}" if len(a) > 1 else "WT_FILELIST"
        platform2files.setdefault(platform, [])
        platform2files[platform].append(file)

res = """
# DO NOT EDIT: automatically built by dist/s_bazel.

# This file is only used by external projects building WiredTiger via Bazel.
"""
for platform, files in platform2files.items():
    res += f"\n{platform} = " + pprint.pformat(files) + "\n"

try:
    with open(filelist_bzl) as f:
        if res == f.read():
            exit()
except OSError:
    pass

with open(filelist_bzl, "w") as f:
    f.write(res)

print(f"Updated dist/{filelist_bzl}")