def parse_manifest()

in build/fbcode_builder/CMake/make_fbpy_archive.py [0:0]
46 lines of code
8 McCabe index (conditional complexity)

def parse_manifest(manifest, path_map):
    bad_prefix = ".." + os.path.sep
    manifest_dir = os.path.dirname(manifest)
    with open(manifest, "r") as f:
        line_num = 1
        line = f.readline()
        if line != MANIFEST_HEADER_V1:
            raise BadManifestError(
                manifest, line_num, "Unexpected manifest file header"
            )

        for line in f:
            line_num += 1
            if line.startswith("#"):
                continue
            line = line.rstrip("\n")
            parts = line.split(MANIFEST_SEPARATOR)
            if len(parts) != 2:
                msg = "line must be of the form SRC %s DEST" % MANIFEST_SEPARATOR
                raise BadManifestError(manifest, line_num, msg)
            src, dest = parts
            dest = os.path.normpath(dest)
            if dest.startswith(bad_prefix):
                msg = "destination path starts with %s: %s" % (bad_prefix, dest)
                raise BadManifestError(manifest, line_num, msg)

            if not os.path.isabs(src):
                src = os.path.normpath(os.path.join(manifest_dir, src))

            if dest in path_map:
                prev_info = path_map[dest]
                msg = (
                    "multiple source paths specified for destination "
                    "path %s.  Previous source was %s from %s:%s"
                    % (
                        dest,
                        prev_info.src,
                        prev_info.manifest_path,
                        prev_info.manifest_line,
                    )
                )
                raise BadManifestError(manifest, line_num, msg)

            info = PathInfo(
                src=src,
                dest=dest,
                manifest_path=manifest,
                manifest_line=line_num,
            )
            path_map[dest] = info