ambevar-dotfiles/.scripts/ubuilder

#!/bin/sh

if [ $# -ne 1 ] || [ "$1" = "-h" ]; then
    cat<<EOF
Usage: ${0##*/} PKGBUILD

Convert an Arch Linux PKGBUILD to a univesral standalone bash script. (The
infamous 'bash' is assumed because PKGBUILD are bash scripts.)

EOF
    exit
fi

if [ -z "$(command -v realpath)" ]; then
    echo "You need 'realpath'"
    exit
fi

if [ ! -f "$1" ]; then
    echo "$1 must be a PKGBUILD file."
    exit
fi

OUTPATH="$(realpath "$1")"
OUTPATH="${OUTPATH%/*}"
UBUILD="${OUTPATH}/UBUILD.sh"

if [ -f "$UBUILD" ]; then
    echo "$UBUILD already exists."
    exit
fi

echo '#!/bin/bash

if [ -z "$(command -v realpath)" ];then
    echo "You need 'realpath'."
    exit
fi
if [ -z "$(command -v wget)" ];then
    echo "You need 'wget'."
    exit
fi

################################################################################
' > "$UBUILD"

cat "$1" | sed -e 's|--prefix=/usr|--prefix=/usr/local|g' \
     -e 's|PREFIX=/usr|PREFIX=/usr/local|g' >> "$UBUILD"

echo '
################################################################################

_ROOT="$(realpath "$0")"
_ROOT="${_ROOT%/*}"
srcdir=src
pkgdir=pkg
init()
{
    mkdir -p "$_ROOT/$srcdir"
    mkdir -p "$_ROOT/$pkgdir"

    srcdir="$(realpath "$srcdir")"
    pkgdir="$(realpath "$pkgdir")"
}

fetch()
{
    for i in $source; do
        echo "[$i]"
        if [ $(echo $i | grep -c "/") -ne 0 ]; then
            FILE="${i##*/}"

            ## TODO: add support for DLAGENT
            wget "$OPT_FORCE" "$i" -O "$FILE"
	        case "$FILE" in
		        *.tar.bz2|*.tbz2) CODEC="j";;
		        *.tar.gz|*.tgz)   CODEC="z";;
		        *.tar.xz|*.txz)   CODEC="J";;
		        *)  echo "[$1]: unrecognized file compression"
                    return 1;;
	        esac

            ## TODO: checksum support.
            tar xvzf "$FILE" -C "$srcdir"
        fi
    done
}

cleanse ()
{
    (cd "$pkgdir" && \
        find . -type f -executable -exec strip -s {} \; \
        )
}

clean ()
{
rm -r "$srcdir" "$pkgdir"
}


compress()
{
    tar cvJf "$pkgname-$pkgver.tar.xz" -C "$pkgdir" usr/ --owner=root --group=root
}

_printhelp ()
{
    cat <<EOE
Usage: ${1##*/} [OPTIONS]

This script can perform multiple operations:
  1. Fetch source code.
  2. Build.
  3. Create package.
  4. Clean folder from build data.
Default operation is to fetch source code if required.

Options:

  -b:  Build.
  -c:  Clean source folders from temp file (keep upstream source and built package).
  -f:  Force operation (overwrite, rebuild, reinstall).
  -h:  Display this help.
  -p:  Create package.

EOE
}

OPT_FORCE="nc"
OPT_BUILD=false
OPT_PACKAGE=false
OPT_CLEAN=false

while getopts ":bcfhp" opt; do
    case $opt in
        b)
            OPT_BUILD=true ;;
        c)
            OPT_CLEAN=true ;;
        f)
            OPT_FORCE="" ;;
        h)
            _printhelp "$0"
            exit 1 ;;
        p)
            OPT_PACKAGE="" ;;
        ?)
            _printhelp "$0"
            exit 1 ;;
        :)
            echo "Missing argument."
            _printhelp "$0"
            exit 1 ;;
    esac
done
shift $(($OPTIND - 1))

init
fetch

if $OPT_BUILD; then (cd "$srcdir" && build); fi
if $OPT_PACKAGE; then (cd "$srcdir" && package) && cleanse && compress; fi
if $OPT_CLEAN; then clean; fi
' >> "$UBUILD"

chmod +x "$UBUILD"