dcache-convert-authzdb-to-omnisession

#!/bin/sh

@DCACHE_LOAD_CONFIG@

printUsage() {
    echo "Usage:"
    echo ""
    echo "    convert-authzdb-to-omnisession [-f] [-c] [AUTHZDB_CONFIG [OMNISESSION_CONFIG]]"
    echo
    echo "This utility converts an authzdb plugin configuration to the equivalent"
    echo "omnisession configuration.  The utility accepts two arguments, both of"
    echo "which are optional."
    echo
    echo "    -f              overwrite existing files."
    echo
    echo "    -c              do not check for authzdb usage."
    echo
    echo "    AUTHZDB_CONFIG  the configuration file for the authzdb configuration"
    echo "                    file.  If not specified then the default location is"
    echo "                    used."
    echo
    echo "    OMNISESSION_CONFIG  the configuration file for the omnisession"
    echo "                    configuration file.  If not specified then the default"
    echo "                    location is used."
    echo
    echo "If the OMNISESSION_CONFIG file already exists then this script will NOT run, so"
    echo "it will not overwrite this file.  Specify the '-f' option to overwrite the existing"
    echo "file."
    echo
    echo "If gPlazma is not configured to use 'authzdb' as a session plugin then this script"
    echo "will NOT run.  Specify the '-c' option to override this behaviuor."
}

fail() { # $1 - why
    echo "$1" >&1
    echo >&1
    printUsage >&1
    exit 1
}

if [ "$1" = "-f" ]; then
    overwrite=1
    shift
fi

if [ "$1" = "-c" ]; then
    dontCheck=1
    shift
fi

[ $# -le 2 ] || fail "You supplied $# arguments and a maximum of two is expected."

gplazmaFile=$(getProperty gplazma.configuration.file)

[ -f $gplazmaFile ] || [ -z "$dontCheck" ] || fail "Cannot find gPlazma configuration file."

grep -q session.*authzdb $gplazmaFile || [ "$dontCheck" = "1" ] || fail "gPlazma is not using authzdb as a session plugin."

if [ $# -ge 1 ]; then
    SRC=$1
else
    SRC=$(getProperty gplazma.authzdb.file)
fi

[ -e "$SRC" ] || fail "Cannot convert file because $SRC does not exist."
[ -f "$SRC" ] || fail "Cannot convert file because $SRC is not a file."
[ -r "$SRC" ] || fail "Cannot convert file because $SRC is not readable."

if [ $# -ge 2 ]; then
    TARGET=$1
else
    TARGET=$(getProperty gplazma.omnisession.file)
fi

[ ! -e "$TARGET" ] || [ "$overwrite" = 1 ] || fail "$TARGET exists and '-f' was not specified."
[ ! -e "$TARGET" ] || [ -f "$TARGET" ] || fail "$TARGET exists and is not a file."

export CLASSPATH="$(printLimitedClassPath slf4j-api logback-classic \
        logback-core logback-console-config guava dcache-common gplazma2-grid)"
quickJava org.dcache.gplazma.plugins.AuthzdbToOmnisession "$SRC" "$TARGET"

if [ $? -eq 0 ]; then
    haveOmnisession=0
    grep -q session.*omnisession $gplazmaFile && haveOmnisession=1

    if [ $haveOmnisession = 0 ]; then
	currentLine=$(grep session.*authzdb $gplazmaFile)
	gplazma_conf=$(basename  $gplazmaFile)
	echo
	echo "To complete the migration, you should update your '${gplazma_conf}' file by"
	if [ "$currentLine" = "" ]; then
	    echo "adding the following line:"
	    echo
	    echo "    session requisite omnisession"
	else
	    newLine=$(echo $currentLine | awk '/session .* authzdb/{print "session "$2" omnisession"}')
	    echo "replacing the line:"
	    echo
	    echo "    $currentLine"
	    echo
	    echo "with the following line:"
	    echo
	    echo "    $newLine"
	fi
	echo
    fi
fi