Automating FreeBSD’s crunchgen(1)

#! /bin/sh
#
# bldcrunch.sh:   Generate a FreeBSD boot_crunch file.  This script does not
#                 function on hosts that are not running FreeBSD.
#
# Author:   Rick
# Date:     25 July 2012
# Modif:

#####
## Variables
#####

SELF="${0##*/}";
NULL="/dev/null";
TMP="/tmp";
PATH="${PATH}";
SVNREPO="http://svn.domain.com/freebsd-repo";
REPODIR="/freebsd-repo";
BOOTCRUNCHDIR="boot_crunch";
BOOTCRUNCHCONF="boot_crunch.conf";
BOOTCRUNCHMK="boot_crunch.mk";
SVNBIN="/usr/local/bin/svn";
CRUNCHGEN="/usr/bin/crunchgen";
MAKE="/usr/bin/make";

#####
## Functions
#####

ERROR_EXIT() {

   echo "${1}" 1>&2;
   [ -d ${TMP}/${BOOTCRUNCHDIR} ] && rm ${TMP}/${BOOTCRUNCHDIR};
   exit 1;

}

#####
## Main
#####

# Verify we're on a FreeBSD host
HOSTOS=`uname -s`;
[ ${HOSTOS} != "FreeBSD" ] && ERROR_EXIT "Build host is not FreeBSD! Exiting!";

# Do all of our binaries exist?
for ea in ${SVNBIN} ${CRUNCHGEN} ${MAKE}; do
   if [ -e ${ea} ]; then
      continue;
   else
      ERROR_EXIT "${ea} is required! Exiting!";
   fi
done

# Update SVN repo to make sure we're using the latest boot_crunch.conf
if [ -d ${REPODIR}/${BOOTCRUNCHDIR} ]; then
   cd ${REPODIR}/${BOOTCRUNCHDIR} && ${SVNBIN} update;
else
   ${SVN} co ${SVNREPO} ${REPODIR};
fi

# Setup our build environment
[ -d ${TMP}/${BOOTCRUNCHDIR} ] && rm -rf ${TMP}/${BOOTCRUNCHDIR};
mkdir ${TMP}/${BOOTCRUNCHDIR} && cd ${TMP}/${BOOTCRUNCHDIR};

# Build the boot_crunch
${CRUNCHGEN} -o ${REPODIR}/${BOOTCRUNCHDIR}/${BOOTCRUNCHCONF};
[ $? -eq 0 ] && ${MAKE} -f ${BOOTCRUNCHMK};
[ $? -ne 0 ] && ERROR_EXIT "Error generating boot_crunch! Exiting!";

#####
## EOF
#####

BTW, I edited this because I found out about wordpress’s sourcecode tag…awesome!