#!@BASH_PATH@
#
# Copyright 2012-2023 the Pacemaker project contributors
#
# The version control history for this file may have further details.
#
# This source code is licensed under the GNU General Public License version 2
# or later (GPLv2+) WITHOUT ANY WARRANTY.
#

# e.g. /etc/sysconfig or /etc/default
CONFIG_DIR=@CONFIGDIR@

cts_root=`dirname $0`

logfile=0
summary=0
verbose=0
watch=0
saved=0
tests=""

install=0
clean=0
kill=0
run=0
boot=0
target=rhel-7
cmd=""
trace=""

custom_log=""
patterns="-e CTS:"

function sed_in_place_remotely() {
    cluster-helper -g $cluster_name -- cp -p "\"$1\"" "\"$1.sed\"" \&\& sed -e "\"$2\"" "\"$1\"" \> "\"$1.sed\"" \&\& mv "\"$1.sed\"" "\"$1\""
}


helpmsg=$(cat <<EOF
Usage: %s [options] {[CMDS]}

[--]help, -h            show help screen and exit
-x                      turn on debugging
-a                      show relevant screen sessions and exit
-c,-g CLUSTER_NAME      set the cluster name
-S                      show summary from the last CTS run
-s                      show summary for the current log (see -l)
-v                      increase verbosity
-p                      (currently unused)
-e PATTERN              grep pattern to apply when 'summary' or 'watch' requested
-l                      print the filename of the log that would be operated on
-w                      continous (filtered) monitoring of the log file
-f,-sf FILE             show summary for the provided log
-t TEST, [0-9]*         add a test to the working set
[--]kill                request termination of cluster software
[--]run                 request CTS run (passing remaining arguments through)
[--]boot, start         request CTS run (with --boot option)
[--]clean               request cleaning up after CTS run
[--]install, --inst     request installing packages to get ready to run CTS
trace-ls, tls           list traced functions
trace-add, tadd FUNC    add a function to the list of traced ones
trace-rm, trm FUNC      remove a function from the list of traced ones
trace-set, tset FUNC    set function(s) as the only to be traced
(f|fedora|r|rhel).*     specify target distro
--                      delimits tests that follow
EOF
)

while true; do
    case $1 in
        -h|--help|help)
            printf "${helpmsg}\n" "$0"
            exit
            ;;
        -x)
            set -x
            shift
            ;;
        -a)
            screen -ls | grep cts
            exit 0
            ;;
        -c|-g)
            cluster_name=$2
            shift
            shift
            ;;
        -S)
            summary=1
            saved=1
            shift
            ;;
        -s)
            summary=1
            shift
            ;;
        -v)
            verbose=`expr $verbose + 1`
            shift
            ;;
        -p)
            shift
            ;;
        -e)
            patterns="$patterns -e `echo $2 | sed 's/ /\\\W/g'`"
            shift
            shift
            ;;
        -l)
            logfile=1
            shift
            ;;
        -w)
            watch=1
            shift
            ;;
        -f|-sf)
            summary=1
            custom_log=$2
            shift
            shift
            ;;
        -t)
            tests="$tests $2"
            shift
            shift
            ;;
        [0-9]*)
            tests="$tests $1"
            shift
            ;;
        --kill|kill)
            kill=1
            shift
            break
            ;;
        --run|run)
            run=1
            shift
            break
            ;;
        --boot|boot|start)
            boot=1
            clean=1
            shift
            break
            ;;
        --clean|clean)
            clean=1
            shift
            ;;
        --inst|--install|install)
            install=1
            clean=1
            shift
            ;;
        trace-ls|tls)
            cmd=$1
            shift
            ;;
        trace-add|tadd|trace-rm|trm|trace-set|tset)
            cmd=$1
            trace=$2
            shift
            shift
            if [ -z "$trace" ]; then
                printf "${helpmsg}\n" "$0"
                exit
            fi
            ;;
        f*)
            target="fedora-`echo $1 | sed -e s/fedora// -e s/-// -e s/f//`"
            shift
            ;;
        r|rhel)
            target="rhel-7"
            shift
            ;;
        r*)
            target="rhel-`echo $1 | sed -e s/rhel// -e s/-// -e s/r//`"
            shift
            ;;
        --)
            shift
            tests="$tests $*"
            break
            ;;
        "")
            break
            ;;
        *)
            echo "Unknown argument: $1"
            exit 1
            ;;
    esac
done

# Add the location of this script
export PATH="$PATH:$cts_root"
which cluster-helper &>/dev/null
if [ $? != 0 ]; then
    echo $0 needs the cluster-helper script to be in your path
    exit 1
fi

which cluster-clean &>/dev/null
if [ $? != 0 ]; then
    echo $0 needs the cluster-clean script to be in your path
    exit 1
fi

if [ "x$cluster_name" = x ] || [ "x$cluster_name" = xpick ]; then
    clusters=`ls -1 ~/.dsh/group/[a-z]+[0-9] | sed s/.*group.// | tr '\n' ' ' `

    echo "custom) interactively define a cluster"
    for i in $clusters; do
        echo "$i) `cluster-helper --list short -g $i`"
    done

    read -p "Choose a cluster [custom]: " cluster_name
    echo
fi

if [ -z $cluster_name ]; then
    cluster_name=custom
fi


case $cluster_name in
    custom)
        read -p "Cluster name: " cluster_name
        read -p "Cluster hosts: " cluster_hosts
        read -p "Cluster log file: " cluster_log
        cluster-helper add -g "$cluster_name" -w "$cluster_hosts"
        ;;
    *)
        cluster_hosts=`cluster-helper --list short -g $cluster_name`
        cluster_log=~/cluster-$cluster_name.log
        ;;
esac

# NOTES ABOUT THESE AWESOME REGULAR EXPRESSIONS:
#
# * We can't assume GNU sed.  Unfortunately, + and * are GNU extensions.  Thus,
#   we have to use {1,} for + and {0,} for *.
# * You don't need to add an extra set of escaped quotes around the sed expression
#   arguments here - sed_in_place_remotely will do that for you.
# * Only literal quotes need the triple backslashes.  All other special characters
#   are fine with just a single one.
# * sed needs a LOT of characters escaped - \, {, }, (, ), and | at least.

if [ x$cmd != x ]; then
    config="${CONFIG_DIR}/pacemaker"
    case $cmd in
        trace-ls|tls)
            cluster-helper -g $cluster_name -- grep "^[[:space:]]*PCMK_trace_functions" $config
            ;;
        trace-add|tadd)
            echo "Adding $trace to PCMK_trace_functions"
            # Note that this only works if there's already a PCMK_trace_functions line.
            # If there isn't one, create it with trace-set first.
            #
            # Match optional whitespace; then PCMK_trace_functions; then an equals
            # surrounded by optional whitespace; then an optional quote; then whatever
            # else (presumably, this is the list of previously traced functions with
            # an optional trailing quote).  Replace the entire line with
            # PCMK_trace_functions=<new_fn>,<previous trailing line contents>
            sed_in_place_remotely "$config" "s/^[ \t]\{0,\}PCMK_trace_functions[ \t]\{0,\}=[ \t]\{0,\}\(\\\"\{0,1\}\)\(.\{1,\}\)/PCMK_trace_functions=\1$trace,\2/"
            ;;
        trace-rm|trm)
            echo "Removing $trace from PCMK_trace_functions"
            # A bunch of simple regexes are easier to follow than one giant one.
            # Look for $trace in the following places on any line containing
            # PCMK_trace_functions near the beginning:
            #
            # (1) At the start of a list -
            #     Match one of a leading quote, or an equals followed by optional
            #     whitespace; then $trace; then a comma.  Replace $trace with whatever
            #     came before it.
            # (2) In the middle of a list -
            #     Match a comma; then $trace; then a comma.  Replace $trace with a
            #     single comma.
            # (3) At the end of a list -
            #     Match a comma; then $trace; then one of a quote, whitespace, or
            #     the EOL.  Replace $trace with whatever came after it.
            # (4) All by itself -
            #     Match one of a leading quote, whitespace, or equals followed by
            #     optional whitespace; then $trace; then one of a trailing quote,
            #     whitespace, or the EOL.  Replace $trace with whatever came before
            #     and after it.
            sed_in_place_remotely "$config" "/^[ \t]\{0,\}PCMK_trace_functions/ { \
                                                s/\(\\\"\|=\|[ \t]\{1,\}\)$trace,/\1/ ; \
                                                s/,$trace,/,/ ; \
                                                s/,$trace\(\\\"\|[ \t]\{1,\}\|$\)/\1/ ; \
                                                s/\(\\\"\|[ \t]\{1,\}\|=[ \t]\{0,\}\)$trace\(\\\"\|[ \t]\{1,\}\|$\)/\1\2/ }"
            ;;
        trace-set|tset)
            echo "Setting PCMK_trace_functions to '$trace'"
            # Do this in two separate sed commands:
            #
            # (1) Unconditionally remove any existing PCMK_trace_functions= lines.
            # (2) Add a new line with $trace after the example line, which therefore
            #     must exist.  Note that GNU sed would support "a PCMK_trace_functions=$trace",
            #     but that's an extension.  For all other seds, we have to put the
            #     command and the text on separate lines.
            sed_in_place_remotely "$config" "/^[ \t]*PCMK_trace_functions/ d ; /^# Example: PCMK_trace_functions/ a\\\
PCMK_trace_functions=\\\"$trace\\\""
            ;;
    esac
    exit 0
fi

if [ $run = 1 ]; then
    install=1
    clean=1
fi

if [ $clean = 1 ]; then
    rm -f $cluster_log
    cluster-clean -g $cluster_name --kill
elif [ $kill = 1 ]; then
    cluster-clean -g $cluster_name --kill-only
    exit 0
fi

if [ $install = 1 ]; then
    cluster-helper -g $cluster_name -- yum install -y pacemaker pacemaker-debuginfo pacemaker-cts libqb libqb-debuginfo
fi

if [ $boot = 1 ]; then
    $cts_root/cts-lab -r -c -g $cluster_name --boot
    rc=$?
    if [ $rc = 0 ]; then
        echo "The cluster is ready..."
    fi
    exit $rc

elif [ $run = 1 ]; then
    $cts_root/cts-lab -r -c -g $cluster_name 500 "$@"
    exit $?

elif [ $clean = 1 ]; then
    exit 0
fi

screen -ls | grep cts-$cluster_name &>/dev/null
active=$?

if [ ! -z $custom_log ]; then
    cluster_log=$custom_log
fi

if [ "x$tests" != x ] && [ "x$tests" != "x " ]; then
    for t in $tests; do
        echo "crm_report --cts-log $cluster_log -d -T $t"
        crm_report --cts-log $cluster_log -d -T $t
    done

elif [ $logfile = 1 ]; then
    echo $cluster_log

elif [ $summary = 1 ]; then
    files=$cluster_log
    if [ $saved = 1 ]; then
        files=`ls -1tr ~/CTS-*/cluster-log.txt`
    fi
    for f in $files; do
        echo $f
        case $verbose in
            0)
                cat -n $f | grep $patterns | grep -v "CTS: debug:"
                ;;
            1)
                cat -n $f | grep $patterns | grep -v "CTS:.* cmd:"
                ;;
            *)
                cat -n $f | grep $patterns
                ;;
        esac
        echo ""
    done

elif [ $watch = 1 ]; then
    case $verbose in
        0)
            tail -F $cluster_log | grep $patterns | grep -v "CTS: debug:"
            ;;
        1)
            tail -F $cluster_log | grep $patterns | grep -v "CTS:.* cmd:"
            ;;
        *)
            tail -F $cluster_log | grep $patterns
            ;;
    esac

elif [ $active = 0 ]; then
    screen -x cts-$cluster_name

else
    touch $cluster_log
    export cluster_name cluster_hosts cluster_log
    screen -S cts-$cluster_name bash
fi