#! /bin/zsh
#
# this file:
#   https://dataswamp.org/~incal/conf/.zsh/install-emacs

emacs_src=https://git.savannah.gnu.org/git/emacs.git

src_dir=~/src
emacs_dir=${src_dir}/emacs


emacs-install-prepare () {
    sudo apt-get -qq update
    sudo apt-get install build-essential debian-goodies libgccjit-10-dev
    sudo apt-get build-dep emacs
}

emacs-src-get () {
    cd $src_dir
    git clone $emacs_src
}

emacs-src-update () {
    cd $emacs_dir
    git fetch
    git merge
}

emacs-src-reset () {
    cd $emacs_dir
    git reset --hard
    git clean -d -f -x
    git config pull.rebase false
    git pull $emacs_src
}

emacs-install () {
    local reset=$1
    local old_ver=$(emacs --version | head -n 1)
    (( ${+reset} )) && emacs-src-reset || emacs-src-update
    emacs-install-local
    local new_ver=$(emacs --version | head -n 1)
    echo "version: $old_ver -> $new_ver"
}

emacs-install-local () {
    cd $emacs_dir
    autogen.sh
    configure --without-all --with-x-toolkit=no --with-native-compilation
    make
    sudo make install
}