Build Zsh from sources on Ubuntu

build-zsh.sh

#!/bin/bash
# Build Zsh from sources on Ubuntu.
# From http://zsh.sourceforge.net/Arc/git.html and sources INSTALL file.

execute () {
	echo "$ $*"
	OUTPUT=$($@ 2>&1)
	if [ $? -ne 0 ]; then
        echo "$OUTPUT"
        echo ""
        echo "Failed to Execute $*" >&2
        exit 1
    fi
}


# Speed up the process
# Env Var NUMJOBS overrides automatic detection
if [[ -n $NUMJOBS ]]; then
    MJOBS=$NUMJOBS
elif [[ -f /proc/cpuinfo ]]; then
    MJOBS=$(grep -c processor /proc/cpuinfo)
elif [[ "$OSTYPE" == "darwin"* ]]; then
	MJOBS=$(sysctl -n machdep.cpu.thread_count)
else
    MJOBS=4
fi

# Some packages may be missing
execute sudo apt-get install -y git-core gcc make autoconf yodl libncursesw5-dev texinfo

#git clone git://git.code.sf.net/p/zsh/code zsh
execute git clone https://github.com/zsh-users/zsh zsh # Mirror of above repo

execute cd zsh

execute ./Util/preconfig

# Options from Ubuntu Zsh package rules file (http://launchpad.net/ubuntu/+source/zsh)
./configure --prefix=/usr \
            --mandir=/usr/share/man \
            --bindir=/bin \
            --infodir=/usr/share/info \
            --enable-maildir-support \
            --enable-max-jobtable-size=256 \
            --enable-etcdir=/etc/zsh \
            --enable-function-subdirs \
            --enable-site-fndir=/usr/local/share/zsh/site-functions \
            --enable-fndir=/usr/share/zsh/functions \
            --with-tcsetpgrp \
            --with-term-lib="ncursesw" \
            --enable-cap \
            --enable-pcre \
            --enable-readnullcmd=pager \
            --enable-custom-patchlevel=Debian \
            LDFLAGS="-Wl,--as-needed -g"

execute make -j $MJOBS

execute make check

execute sudo make install

execute sudo make install.info