% ConTeXt Packaging Scripts
% https://github.com/gucci-on-fleek/context-packaging
% SPDX-License-Identifier: CC0-1.0+
% SPDX-FileCopyrightText: 2025 Max Chernoff

% This TeX Live-specific file updates the ConTeXt LMTX filename cache if the
% system ls-R files are modified (typically by mktexlsr). It also sets the
% default paper size from the context-papersize.tex file which TeX Live
% creates/updates (in tlpkg/TLPaper.pm).

\startluacode
    local addsuffix = file.addsuffix
    local attributes = lfs.attributes
    local difftime = os.difftime
    local file_join = file.join
    local getfirstreadablefile = caches.getfirstreadablefile
    local gethashes = resolvers.gethashes
    local hashed = caches.hashed
    local ipairs = ipairs
    local resolve = resolvers.resolve

    local stale = false
    for _, tree in ipairs(gethashes()) do
        local lsR_path = file_join(resolve(tree.name), "ls-R")
        local lsR_time = attributes(lsR_path, "modification")

        local hash = hashed(tree.name)
        local hash_path = getfirstreadablefile(addsuffix(hash, "lua"), "trees")
        local hash_time = attributes(hash_path, "modification")

        if lsR_time and hash_time and difftime(lsR_time, hash_time) > 0 then
            stale = true
        end
    end

    if stale then
        resolvers.renewcache()
        resolvers.load()
    end
\stopluacode

% Set the default paper size
\readsysfile{context-papersize.tex}{}{}