blends-common 0.6.15ubuntu2 / usr / share / menu / blend-menu

#!/bin/bash

# Script to handle menu profiles for Debian Pure Blends subsystem, installed
# by your system administrator via blends-common package.
#
# It prints on STDOUT Debian menu entries for user

CONFBASE=${CONFBASE:-/etc/blends}

# read generic Blends conf ... in case it exists
# Since menu 2.1.39 triggers are used to run update-menus for every change
# in /usr/{lib,share}/menu - which fails finding ${CONFBASE}/blends.conf in
# case you are installing blends-common the first time.  I do not regard this
# as a reasonable behaviour because it is a real performance loss and
# obviousely error prone (for instance in case of blends-common (see #484167)
# but we have to deal with this somehow
if [ -s "${CONFBASE}/blends.conf" ] ; then
    . ${CONFBASE}/blends.conf
else
    exit 0
fi

BLENDUSER=`whoami`

tasksdir=/usr/share/blends/tasks

# it has to be run only by unprivileged users via update-menus
test "${BLENDUSER}" == "root" && exit 0

# Upper case the first letter of a string to have a nicer menu
NameToUpper() {
	if [ $# -ne 1 ] ; then
		RET=64 # EX_USAGE
		return ${RET}
	fi
	echo $1 | perl -ne 'print "\u\L$_";'
	return 0
}

# Obtain title from HTML page for menu hints
GetHTMLTitle () {
        if [ $# -ne 1 ] ; then
                RET=64 # EX_USAGE
                return ${RET}
        fi
        perl -ne 'while (<>) {chomp; $all.="$_ ";}
                    ($title) = ($all =~ /.*\<title\>(.*)\<\/title\>.*/i);
                    $title =~ s/\s+/ /g ;
                    print $title ; exit 0;' $1
	return 0
}

# Obtain title (= first line) from text file for menu hints
GetTxtTitle () {
        if [ $# -ne 1 ] ; then
                RET=64 # EX_USAGE
                return ${RET}
        fi
	head -1 $1 | sed -e "s/[[:space:]]\+/ /g" -e "s/^[[:space:]]*\(.*\)[[:space:]]*$/\1/"
	return 0
}

# Strip Blend name from metapackage name
# FIXME: the Blend name does not necessarily match the metapackage
#        prefix. Example: education-* packages of Debian Edu
#        Proposed fix: Read Blend name from config file
GetTaskNameFromPackage () {
        if [ $# -ne 2 ] ; then
                RET=64 # EX_USAGE
                return ${RET}
        fi
	BLEND=$1 # Blend name
	PKG=$2   # metapackage name
	echo $PKG | sed "s/^${BLEND}-//"
	return 0
}

# Obtain task title which has to be defined in the metapackage control templates
GetTaskTitle () {
        if [ $# -ne 1 ] ; then
                RET=64 # EX_USAGE
                return ${RET}
        fi
	PKG=$1  # metapackage name
	cat "$tasksdir"/"$BLEND"/`GetTaskNameFromPackage "$BLEND" "$PKG"`
	return 0
}

getMenuEntriesFromDependencies() {
	RET=""
	if [ $# -ne 1 ] ; then
		RET=64 # EX_USAGE
		return ${RET}
	fi
	PKG="$BLEND"-$1
	TASK=`GetTaskTitle $PKG`
	SECTION=`NameToUpper "$BLEND"`/`NameToUpper "$TASK"`

	# find the list of Depends / Recommends / Suggests
	DepPkgs=`dpkg --status "$PKG" | \
		sed -e '/^Description/,$d' -e '/^Conffiles/,$d' | \
		grep -v ^[A-CE-QT-Z] | \
		grep -v ^S[eot] | \
		sed -e "s/([^)]*)//" \
		    -e "s/,* *${BLEND}-config//" \
		    -e "s/^[^:]*: *//" \
		    -e "s/, */\\n/g" | \
		sort | uniq`

	# check whether Blend maintainer provided menu override different from
	# package maintainers menu file
	# FIXME: This is outdated!  The concept of menu files named like the
        #        metapackage is stopped in favour of single menu files named like
        #        the dependant package.  The rationale is that you can get more
        #        fine grained replacements.
	blendmenufile=""
	if   [ -s "$HOME"/.menu/"$PKG" ] ; then
		blendmenufile="$HOME"/.menu/"$PKG"
	elif [ -s /etc/blends/"$BLEND"/menu/"$PKG" ] ; then
		blendmenufile=/etc/blends/"$BLEND"/menu/"$PKG"
	elif [ -s /usr/lib/blends/"$BLEND"/menu/"$PKG" ] ; then
		blendmenufile=/usr/lib/blends/"$BLEND"/menu/"$PKG"
	elif [ -s /usr/share/blends/"$BLEND"/menu/"$PKG" ] ; then
		blendmenufile=/usr/share/blends/"$BLEND"/menu/"$PKG"
	fi

	for pkg in $DepPkgs ; do
	    # if Blend maintainer provided override just continue
	    [ ! -z "$blendmenufile" ] && grep -q -i "?package($pkg)" "$blendmenufile" && continue

	    # check for documentation text of Blend maintainer which should
	    # be prefered over package maintainers menu
	    docfile=""
	    if   [ -s /usr/share/doc/"$PKG"/"$pkg".html ] ; then
		docfile=/usr/share/doc/"$PKG"/"$pkg".html
	    elif [ -s /usr/share/doc/"$PKG"/"$pkg".txt ] ; then
		docfile=/usr/share/doc/"$PKG"/"$pkg".txt
	    elif [ -s /usr/share/doc/"$PKG"/"$pkg" ] ; then
		docfile=/usr/share/doc/"$PKG"/"$pkg"
	    fi
	    # if Blend maintainer provides documentation view this as menu entry ...
	    if [ ! -z "$docfile" -a -s "$docfile" ] ; then
		hint=""
		if file "$docfile" | grep -q HTML ; then
		    senspager=sensible-browser
		    hint=`GetHTMLTitle "$docfile"`
		else
		    senspager=sensible-pager
		    hint=`GetTxtTitle "$docfile"`
		fi
		if [ ! -z "$hint" ] ; then
		    hint="hints=\""$hint"\""
		fi
		# Force menu-1 entry in case before this was menu-2 used
		cat <<EOT
!C menu-1
?package($pkg): needs="text" \\
        section="$SECTION" \\
	title="`NameToUpper "$pkg"`" $hint \\
	command="$senspager $docfile"
EOT
	    fi

	    # search for a menu file with the following priority
	    # ${HOME}/.menu, /etc/menu, /usr/share/blends/${BLEND}/menu, /usr/share/menu, /usr/lib/menu
	    pkgmenufile=""
	    donotchange=1
	    if   [ -s "$HOME"/.menu/"$pkg" ] ; then
		pkgmenufile="$HOME"/.menu/"$pkg"
	    elif [ -s /etc/menu/"$pkg" ] ; then
		pkgmenufile=/etc/menu/"$pkg"
	    elif [ -s /usr/share/blends/"$BLEND"/menu/"$pkg" ] ; then
		pkgmenufile=/usr/share/blends/"$BLEND"/menu/"$pkg"
		donotchange=0
	    elif [ -s /usr/share/menu/"$pkg" ] ; then
		pkgmenufile=/usr/share/menu/"$pkg"
	    elif [ -s /usr/lib/menu/"$pkg" ] ; then
		pkgmenufile=/usr/lib/menu/"$pkg"
	    fi
            if [ ! -z "$pkgmenufile" ] ; then
		# Force menu-1 entry in case before this was menu-2 used
		## if ! grep -q -c '^!C' $pkgmenufile ; then
		echo '!C menu-1'
		## fi
		if [ $donotchange -eq 1 ] ; then
		    # the 2. and 3. -e - expression tries to fix missing '"' around the entries
		    sed -e "/^[[:space:]]*$/d" \
			-e 's?\([ :][^=^ ]*=\) *\([^"^=]*\)\( [^=]\+=\)?\1"\2"\3?g' \
			-e 's?\([ :][^=^ ]*=\) *\([^"^=]*\)\( [^=]\+=\)?\1"\2"\3?g' \
			-e 's?\( [^=]\+=\) *\([^"^=]\+[^"^\]\)$?\1"\2"?' \
			-e "s?\(section\)[[:space:]]*=[[:space:]]*\"*[^\"\\]*\"*?\1=\"$SECTION\"?" $pkgmenufile
		else
		    # strip possible comments
		    grep -v "^[[:space:]]*#" $pkgmenufile
		fi
	    fi
	    # HACK: Add blank line which helps in case of missing newlines
	    echo
	done
	
	[ -s "$blendmenufile" ] && cat "$blendmenufile"
}

ALLBLENDS=`getBlendList`
for BLEND in ${ALLBLENDS}; do
	# read per Blend conf
	test -f  ${CONFBASE}/${BLEND}/${BLEND}.conf && \
		. ${CONFBASE}/${BLEND}/${BLEND}.conf

	if [ -d "$tasksdir"/"$BLEND" ] ; then
		for PKG in `ls "$tasksdir"/"$BLEND"` ; do
			getMenuEntriesFromDependencies "$PKG"
		done
	fi

#	# print on STDOUT menu generic entries if user belongs to Blend
#	checkUserInBlend ${BLEND} ${BLENDUSER} && \
#		test -d ${CONFBASE}/${BLEND}/menu/ && \
#			find ${CONFBASE}/${BLEND}/menu/ -maxdepth 1 -mindepth 1 -type f \
#				-exec cat {} \;
#
#	# and role specific menu entries
#	for ROLE in `getUserRoles ${BLEND} ${BLENDUSER}`; do
#		test -d ${CONFBASE}/${BLEND}/menu/${ROLE} &&
#			find ${CONFBASE}/${BLEND}/menu/${ROLE} -maxdepth 1 -mindepth 1 \
#				-type f -exec cat {} \;
#	done
done