emacs-27.sh

#!/bin/bash

# install emacs 27

## install dependencies

sudo apt install -y autoconf automake autotools-dev bsd-mailx build-essential \
    diffstat gnutls-dev imagemagick libasound2-dev libc6-dev libdatrie-dev \
    libdbus-1-dev libgconf2-dev libgif-dev libgnutls28-dev libgpm-dev libgtk2.0-dev \
    libgtk-3-dev libice-dev libjpeg-dev liblockfile-dev liblqr-1-0 libm17n-dev \
    libmagickwand-dev libncurses5-dev libncurses-dev libotf-dev libpng-dev \
    librsvg2-dev libsm-dev libthai-dev libtiff5-dev libtiff-dev libtinfo-dev libtool \
    libx11-dev libxext-dev libxi-dev libxml2-dev libxmu-dev libxmuu-dev libxpm-dev \
    libxrandr-dev libxt-dev libxtst-dev libxv-dev quilt sharutils texinfo xaw3dg \
    xaw3dg-dev xorg-dev xutils-dev zlib1g-dev libjansson-dev libxaw7-dev \
    libselinux1-dev libmagick++-dev libacl1-dev

## download and install

cd ~
git clone -b emacs-27 --depth 1 git://git.sv.gnu.org/emacs.git
cd emacs
./autogen.sh
./configure
make
sudo make install
cd ~
rm -rf ~/emacs