Arch Linux

deltaecho

Member

From: Georgia (USA)

Registered: 2008-08-06

Posts: 193

Wrapper script to build PKGBUILD's in RAM

I've been wanting to do 2 things for the last couple weeks: 1) create a wrapper script to build Arch pkg's in RAM and 2) create KDE trunk PKGBUILDs for those adventurous enough to use them (such as myself).  Anyway, I sat down and began the task today; I haven't progressed too far, and probably won't do much more with it until next weekend because of school, but here is the current, very alpha-ish but working, wrapper script I will use:

#!/bin/bash                                                                           

# =============================================================
# kdepkg is a wrapper script to build KDE-TRUNK packages in RAM.
# =============================================================

# Holds the location of the original directory
ORIG_DIR="`pwd`"

# Build each package listed as arguments
for dir in ${@}; do                     
        cd ${dir}                       

        # Create some local variables
        PKG_NAME="`grep pkgname PKGBUILD| head -n1 | sed -e "s/'//g" | sed -e 's/"//g' |
                sed -e 's/=/ /' | awk '{print $2}'`"
        SRC_DIR="`pwd`/src/`grep _svnmod PKGBUILD | head -n1 | sed -e "s/'//g" |       
                sed -e 's/"//g' | sed -e 's/=/ /' | awk '{print $2}'`"                 
        BUILD_DIR="/dev/shm/${PKG_NAME}-build"                                         

        # Create the necessary directories
        mkdir -p ${SRC_DIR} \     
                 ${BUILD_DIR}     

        # Link the build directory to the source directory
        ln -sf ${BUILD_DIR} ${SRC_DIR}

        # Create a unique stamp for the backup PKGBUILD
        UNIQUE="`date +"%m%d%y_%H%M%S"`"

        # Modify the PKGBUILD && make a pkg
        mv -f PKGBUILD PKGBUILD.${UNIQUE}.bak
        sed -e "s:[.][.]:${SRC_DIR}:" PKGBUILD.${UNIQUE}.bak > PKGBUILD && makepkg
        mv -f PKGBUILD.${UNIQUE}.bak PKGBUILD

        # Remove the build directory
        rm -rf ${BUILD_DIR} \
               ${SRC_DIR}/${PKG_NAME}-build
done

# Return to the original directory
cd ${ORIG_DIR}

It's currently very picky about what it will build, but is sufficient enough to build my packages.  I plan to extend its abilities to include building any package, whether it uses a build directory or not, regardless of the packaging technique utilized.  I will also include options to specify the temp directory to use as the base for build directories and whether to delete them after package creation.

Here's an example of one of the PKGBUILD's this will work with:

# KDE Trunk Libraries               
# Contributor: Dylon Edwards <deltaecho@archlinux.us>                   

pkgname=kdetrunk-kdelibs
pkgver=860962           
pkgrel=1               
pkgdesc="KDE Core Libraries"
arch=('i686' 'x86_64')     
url='http://www.kde.org'   
license=('GPL' 'LGPL' 'FDL')
groups=('kde')             
depends=('libxcursor' 'kdetrunk-phonon' 'shared-mime-info' 'qt-copy' 'libxpm'
         'enchant' 'jasper' 'openexr' 'kdetrunk-strigi' 'bzip2' 'libxslt' 'libxtst'
         'giflib' 'kdetrunk-soprano' 'ca-certificates' 'heimdal' 'pmount')         
makedepends=('pkgconfig' 'cmake' 'kdetrunk-automoc4' 'intltool' 'avahi' 'libgl')   
replaces=('arts')                             
conflicts=('kdelibs' 'kdemod-kdelibs')                                   
options=('docs')                                                         
source=()                                                                 
md5sums=()

_svnmod='kdelibs'
_svntrunk="svn://anonsvn.kde.org/home/kde/trunk/KDE"

build() {
        cd ${srcdir}

        # update the src as needed
        [ -d ${_svnmod}/.svn ] && svn up ${_svnmod} || svn co ${_svnroot}/${_svnmod}
        cd ${_svnmod}                                                                   

        # Create a build directory
        mkdir -p ${_svnmod}-build && cd ${_svnmod}-build

        # Configure the package
        cmake -D CMAKE_BUILD_TYPE=Release \
              -D KDE_DISTRIBUTION_TEXT='Arch Linux' \
              -D CMAKE_INSTALL_PREFIX=/usr \
              -D SYSCONF_INSTALL_DIR=/etc \
              -D KDE_DEFAULT_HOME='.kde4' .. || return 1

        # Begin make
        make || return 1

        # Install the package to the fakeroot directory
        make DESTDIR=${pkgdir} install || return 1
}

What do y'all think?

Edit: I might should add, in case my intentions weren't very clear, that this script will be extended to building PKGBUILD's other than those designed for KDE.  Its advantage over moving the entire directory to RAM and building it there is that only the build directory is located off the hard disk.  This is important to my project because I only need to update KDE's subversion files in order to keep up-to-date (if I had to download everything each time I updated the packages, I would do everything in RAM).  Building the packages in a tmpfs directory is MUCH faster than building them directly from the hard disk, and reduces the latter's wear and tear on the life and fragmentation of the hard drive.  I got the idea from here and here.

Last edited by deltaecho (2008-09-14 22:01:08)

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Dylon

lilsirecho

Veteran

Registered: 2003-10-24

Posts: 5,000

Re: Wrapper script to build PKGBUILD's in RAM

Good show...pleased to see the speed and performance of a ram based PKGBUILD.

My system has no HDD, is based on Compact Flash devices in Faunos.  I may give this procedure a tryout on a "Live" system.

EDIT:

Faunos already uses tmpfs so I guess the PKGBUILDS already perform in ram along with the system via aufs for downloads.

Last edited by lilsirecho (2008-09-14 22:47:31)

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