#! /bin/bash
#==========================================================================
# Execute any hooks required for this segment
#
# Title:         pbuilder-runhooks
# Description    User hooks for pbuilder package
# Programmed by: Dale Amon <amon@vnl.com>

# $HOOKDIR is set in /etc/pbuilderrc and contains a list of executable
# programs or scripts. The type is only limited by what you expect will
# be available in your chrooted environment after debootstrap has done
# an initial install. The functions muxt be named in the format:
# <prefex><digit><digit><descriptive name>. Currently only X is defined;
# scripts prefixed with X will be run just before the chroot environment
# is exited and the base.tgz file is created or updated.

# $BUILDPLACE is as used in pbuilder. When already inside chroot, this
# routine can be called with $BUILDPLACE=''

# TODO:		* Are there any other executable backup types we should
#		  filtered besides *~ and *.bak?
#
#==========================================================================

hooks=tmp/hooks

#==========================================================================
# Set up fresh chroot'd hooks tmp script directory
# 

function loadhooks () {
    if [ -z "$HOOKDIR" ]; then
	return ;
    fi
    if [ -d "$BUILDPLACE/$hooks" ]; then
	rm -rf "$BUILDPLACE/$hooks"
    fi
    if [ -d "$HOOKDIR" ]; then
	mkdir -p "$BUILDPLACE/$hooks"
	if ! cp -a "$HOOKDIR/"* "$BUILDPLACE/$hooks"; then
	    echo "W: no hooks found on the hookdir" >&2 
	fi
    fi
}

#--------------------------------------------------------------------------
# Tidy up after ourselves. (Anything we leave behind ends up in base.tgz)
#

function unloadhooks () {
    if [ -z "$HOOKDIR" ]; then
	return ;
    fi
    if [ -d "$BUILDPLACE/$hooks" ]; then
	rm -rf "$BUILDPLACE/$hooks"
    else
	echo "E: Logic failure." >&2 
    fi
}

#--------------------------------------------------------------------------
# Execute every script found in the chroot'd target directory. We only 
# test for whether a file is executable because we have no idea what
# the user had put in their dist. If they want PL/1 and ADA on the base
# dist or have decided to use emacslisp for everything, it's their 
# problem.
#
# Args:		Required prefix on hook fn name
# Returns:	none
#

function executehooks () {
    local prefix="$1"
    if [ -z "$HOOKDIR" ]; then
	return ;
    fi
    for fn in "$BUILDPLACE/$hooks/$prefix"[0-9][0-9]* ; do
	case "$fn" in
	    "$BUILDPLACE/$hooks/$prefix"'[0-9][0-9]*')
		echo "W: no hooks of type ${prefix} found -- ignoring" >&2 
		;;
	    *~)
		echo "W: skipping an editor backup file $fn" >&2 
		;;
	    *.bak)
		echo "W: skipping a backup file $fn" >&2 
		;;
	    *)	
		if [ -x "$fn" ]; then
		    $CHROOTEXEC "$hooks/"$(basename "$fn")
		    echo " -> user script $fn finished"
		else
		    if [ -f "$fn" ]; then
			filetype=$(basename "$fn" ) 
			echo "W: execute priv not set on file $filetype, not executing." >&2 
		    else
			# Should it reach here ? This case should be caught in the above case.
			echo "W: no hooks of type ${prefix} found -- internal error in logic" >&2 
		    fi
		fi  
	        ;;	
	esac
    done
}

#--------------------------------------------------------------------------