update-libxcrypt-static

#!/usr/bin/env nix-shell
#! nix-shell -i zsh -p zsh gnutar xz git cacert coreutils gnused nixfmt-rfc-style --pure
#
# Copyright © 2025 Barry Schwartz
#
# This program is free software: you can redistribute it and/or
# modify it under the terms of the GNU General Public License, as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received copies of the GNU General Public License
# along with this program. If not, see
# <https:#www.gnu.org/licenses/>.
#

set -e
program_name="${0}"

source glibc-libre-files/command-line.zsh
source glibc-libre-files/helpers.zsh

libxcrypt_subdir="pkgs/development/libraries/libxcrypt"
libxcrypt_in_local_repo="${local_repo}/${libxcrypt_subdir}"
libxcrypt_dir="glibc-libre/libxcrypt"
abs_libxcrypt_dir=`realpath ${PWD}`/"${libxcrypt_dir}"

function obtain_the_libxcrypt_derivation
{
    printf "Obtaining the libxcrypt derivation.\n"
    require_the_local_repo
    rm -R -f libxcrypt-with-static
    mkdir -p "${abs_libxcrypt_dir}"
    cp -R "${libxcrypt_in_local_repo}"/* "${abs_libxcrypt_dir}"
}

function edit_libxcrypt
{
    local defnix="${abs_libxcrypt_dir}/default.nix"

    printf "Editing the derivation.\n"

    # The only changes are in the name and that we want a static
    # library instead of a shared library.

    sed -i -E \
        -e 's|pname[[:space:]]*=[[:space:]]*"libxcrypt"|pname="libxcrypt-static"|' \
        -e 's|"--disable-failure-tokens"|"--disable-failure-tokens" "--enable-static" "--disable-shared"|' \
        "${defnix}"

    nixfmt "${defnix}"
}

function write_a_configuration
{
    printf "Writing a Nix configuration.\n"

    the_file=glibc-libre/libxcrypt-static.nix

    cat > "${the_file}" <<EOF
{ pkgs, ... }:

{
  nixpkgs.overlays = [
    (final: prev: {
      libxcrypt-static = final.pkgs.callPackage ./libxcrypt { };
    })
  ];
}
EOF

    nixfmt "${the_file}"
}

rm -R -f glibc-libre/libxcrypt
obtain_the_libxcrypt_derivation
edit_libxcrypt
write_a_configuration
printf "Done.\n"

# local variables:
# mode: shell-script
# sh-shell: zsh
# coding: utf-8
# indent-tabs-mode: nil
# end: