bash script for installing tmux & htop without root access

tmux_htop_local_install.sh

#!/bin/bash

# Script for installing tmux & htop on systems where you don't have root access.
# tmux & htop will be installed in $HOME/.local/bin.

# exit on error
set -e

# Required commands for script
if ! command -v wget >/dev/null 2>&1; then
    echo "ERROR: missing \`wget\`"
    exit 1
elif ! command -v make >/dev/null 2>&1; then
    echo "ERROR: missing \`make\`"
    exit 1
elif ! command -v gcc >/dev/null 2>&1; then
    echo "ERROR: missing C/C++ compiler"
    exit 1
elif ! command -v python >/dev/null 2>&1; then
    echo "ERROR: missing Python"
    exit 1
fi

TMUX_VERSION=2.8
LIBEVENT_VERSION=2.1.8
NCURSES_VERSION=6.1
HTOP_VERSION=2.2.0

# for make
function make_jobs () {
    if [[ $(expr $(nproc) / 2) -le 0 ]]; then
        jobs=1
    else
        jobs=$(expr $(nproc) / 2)
    fi  
}
make_jobs
# Create necessary folders
mkdir -p $HOME/.local/bin

# download source files for tmux, libevent, ncurses, and htop
wget -O tmux-${TMUX_VERSION}.tar.gz                https://github.com/tmux/tmux/releases/download/${TMUX_VERSION}/tmux-${TMUX_VERSION}.tar.gz
wget -O libevent-${LIBEVENT_VERSION}-stable.tar.gz https://github.com/libevent/libevent/releases/download/release-${LIBEVENT_VERSION}-stable/libevent-${LIBEVENT_VERSION}-stable.tar.gz
wget -O ncurses-${NCURSES_VERSION}.tar.gz          https://ftp.gnu.org/gnu/ncurses/ncurses-${NCURSES_VERSION}.tar.gz
wget -O htop-${HTOP_VERSION}.tar.gz                https://hisham.hm/htop/releases/2.2.0/htop-2.2.0.tar.gz

# extract files, configure, and compile

############
# libevent #
############
echo -e "\n~~  libevent  ~~"
tar xvzf libevent-${LIBEVENT_VERSION}-stable.tar.gz
cd libevent-${LIBEVENT_VERSION}-stable
./configure --prefix=$HOME/.local --disable-shared
make -j ${jobs}
make -j ${jobs} install
cd ..

############
# ncurses  #
############
echo -e "\n~~  ncurses  ~~"
tar xvzf ncurses-${NCURSES_VERSION}.tar.gz
cd ncurses-${NCURSES_VERSION}
./configure --prefix=$HOME/.local --enable-widec
make -j ${jobs}
make -j ${jobs} install
cd ..

############
# tmux     #
############
echo -e "\n~~  tmux  ~~"
tar xvzf tmux-${TMUX_VERSION}.tar.gz
cd tmux-${TMUX_VERSION}
CPPFLAGS="-I$HOME/.local/include -I$HOME/.local/include/ncursesw" LDFLAGS="-L$HOME/.local/lib" ./configure
CPPFLAGS="-I$HOME/.local/include -I$HOME/.local/include/ncursesw" LDFLAGS="-static -L$HOME/.local/lib" make -j ${jobs}
cp tmux $HOME/.local/bin
cd ..

############
# htop     #
############
echo -e "\n~~ htop  ~~"
tar xvzf htop-${HTOP_VERSION}.tar.gz
cd htop-${HTOP_VERSION}
CPPFLAGS="-I$HOME/.local/include -I$HOME/.local/include/ncursesw" LDFLAGS="-L$HOME/.local/lib" ./configure
CPPFLAGS="-I$HOME/.local/include -I$HOME/.local/include/ncursesw" LDFLAGS="-static -L$HOME/.local/lib" make -j ${jobs}
cp htop $HOME/.local/bin
cd ..

echo "$HOME/.local/bin/tmux and $HOME/.local/bin/htop is now available. You can optionally add $HOME/.local/bin to your PATH."