some tweaks and installer...

install.sh

@@ -0,0 +1,112 @@
+#!/usr/bin/env bash
+set -e
+# for step by step debug uncomment the below 2 lines:
+# set -x
+# trap read debug
+source installer.bash
+
+# set defaults
+export DEBUG=0 # to turn on, set DEBUG=1, more printing happens
+export REQUIRED=0
+LOCAL_PATH="${HOME}"
+SCRIPT_PATH="${HOME}/.irssi/scripts"
+
+
+usage(){
+    local long="${1}"
+    cat << _EOF1_
+ABOUT
+    installs the irssi configuration to show notifications on gnome desktop.
+
+USAGE
+    ${0} [options]
+
+OPTIONS:
+    --locpath   - user writeable path where "bin" folder will be used to put files
+                [default: ${LOCAL_PATH}]
+    --scripts   - irssi scripts folder
+                [default: ${SCRIPT_PATH}]
+
+_EOF1_
+
+    if [[ -z "${long}" ]]; then
+        return
+    fi
+    cat << _EOF2_
+EXAMPLES:
+    1. Using all the defaults:
+    ${0}
+
+    2. Passing only selection of parameters:
+    ${0} \\
+        --locpath="\$HOME/local"
+
+    3. Passing ALL params:
+    ${0} \\
+        --locpath="\$HOME/local" \\
+        --scripts="\$HOME/.irssi/plugins/scripts"
+
+_EOF2_
+
+}
+
+
+get_opts(){
+    local \
+        long \
+        short
+    local args=""
+    local options_arr=(
+        "locpath"
+        "scripts"
+        "help"
+    )
+    REQUIRED=0
+    long=$( installer.generate_long_opts "${options_arr[@]}" )
+    short=$( installer.generate_short_opts "${options_arr[@]}" )
+    args="$( getopt -o "${short}" -l "${long}" -n "$0" -- "$@" )"
+    eval set -- "$args";
+    while true; do
+        case "$1" in
+            -l|--locpath)
+                shift; LOCAL_PATH="${1}"; shift;
+                ;;
+            -s|--scripts)
+                shift; SCRIPT_PATH="${1}"; shift;
+                ;;
+            -h)
+                usage; installer.die 0 "";
+                ;;
+            --help)
+                usage "long"; installer.die 0 "";
+                ;;
+            --)
+                shift; break;
+                ;;
+                # end of options
+        esac
+    done
+}
+
+
+main(){
+    local required_apps
+    required_apps=(
+        "pgrep"
+        "xargs"
+        "irssi"
+        "canberra-gtk-play"
+    )
+    installer.check_required_apps "${required_apps[@]}"
+    get_opts "${@}"
+
+    installer.run_installer \
+        "${LOCAL_PATH}/bin/irssi-notifier.sh" \
+        "${LOCAL_PATH}/bin/notify-listener.py" \
+        "${SCRIPT_PATH}/notify.pl"
+}
+
+
+if ! [[ "$0" =~ /bash$ ]]; then
+    main "${@}"
+fi

installer.bash

@@ -0,0 +1,185 @@
+#!/usr/bin/env bash
+#set -x
+#set -e
+
+#DEBUG=0 # to turn on, set DEBUG=1, more printing happens
+# for step by step debug uncomment the below 2 lines:
+# set -x
+# trap read debug
+# set defaults
+LOCAL_PATH="${HOME}"
+SCRIPT_PATH="${HOME}/.irssi/scripts"
+REQUIRED=0
+
+installer.log_info(){
+    local message_str="${*}"
+    [[ -n "${message_str}" ]] || return 0
+    echo \
+        -en "INFO: ${message_str}"
+    echo
+    return 0
+}
+
+
+installer.log_debug(){
+    local message_str="${*}"
+    if [[ "${DEBUG}" -eq 0 ]]; then
+        return 0
+    fi
+    [[ -n "${message_str}" ]] || return 0
+    echo \
+        -en "DEBUG: ${message_str}"
+    echo
+    return 0
+}
+
+
+installer.log_error(){
+    local message_str="${*}"
+    [[ -n "${message_str}" ]] || return 0
+    echo \
+        -e "ERROR: ${message_str}" \
+    > /dev/stderr
+    return $?
+}
+
+
+installer.die(){
+    local return_code="${1:-1}"
+    local message_str="${*:2}"
+    installer.log_error "${message_str}"
+    exit "${return_code}"
+}
+
+
+installer.check_required_apps(){
+    # verify required apps are present
+    local \
+        apps \
+        app
+    apps=("${@}")
+    installer.log_debug "in installer.check_required_apps(${apps[*]})"
+    for app in "${apps[@]}"; do
+        type \
+            "${app}" \
+        &> /dev/null
+        [[ 0 -eq $? ]] \
+        || installer.die $? "$0 failed: no ${app} on PATH, please install."
+    done
+}
+
+
+installer.generate_long_opts(){
+    # prepares long options for getopts
+    local \
+        options_arr \
+        option \
+        result
+
+    options_arr=("${@}")
+    result=""
+    for option in "${options_arr[@]}"; do
+        [[ -z "${result}" ]] || result+=","
+        result+="${option}"
+        result+=":"
+        if [[ "${REQUIRED}" -eq 0 ]]; then
+            result+=":"
+        fi
+    done
+    echo "${result}"
+    return 0    
+}
+
+
+installer.generate_short_opts(){
+    # prepare short options for getopts
+    local \
+        options_arr \
+        option \
+        result
+
+    options_arr=("${@}")
+    result=""
+    for option in "${options_arr[@]}"; do
+        result+="${option:0:1}"
+        result+=":"
+        if [[ "$REQUIRED" -eq 0 ]]; then
+            result+=":"
+        fi
+    done
+    echo "${result}"
+    return 0
+}
+
+
+installer.make_desktop_entry(){
+    local \
+        apppath \
+        dest_path \
+        base_path \
+        desktop_entry_path
+    installer.log_debug "in installer.make_desktop_entry(${*})"
+    apppath="${1}"
+    dest_path="${2:-"$HOME/.config/autostart"}"
+    [[ -n "${apppath}" ]] \
+    || installer.die $? "first param cannot be empty: '${apppath}'"
+    base_path="${apppath##*/}"
+    installer.log_debug "base_path=$base_path"
+    desktop_entry_path="${dest_path}/${base_path%.*}.desktop"
+    installer.log_debug "desktop_entry_path=$desktop_entry_path"
+    mkdir -p "${dest_path}"
+
+    cat > "${desktop_entry_path}" << _EOF3_
+#!/usr/bin/env xdg-open
+[Desktop Entry]
+Version=1.0
+Type=Application
+Name=${base_path}
+Comment=Launcher for ${base_path}
+TryExec=${apppath}
+Exec=${apppath} %F
+
+_EOF3_
+    chmod +x "${desktop_entry_path}"
+    installer.log_debug "Created desktop entry: ${desktop_entry_path}"
+    return 0
+}
+
+installer.install_files(){
+    local \
+        targets \
+        target \
+        base \
+        folder
+    targets=("${@}")
+    installer.log_debug "=> installer.install_files(${targets[*]})"
+    for target in "${targets[@]}";  do
+        base="${target##*/}"
+        folder="${target%/*}"
+        [[ -d "${folder}" ]] \
+        || installer.die $? "${folder} is not a directory"
+        cmd=(
+            "install"
+            "--verbose"
+            "-D"
+            "-m" "0755"
+            "./${base}"
+            "${target}"
+        )
+        installer.log_debug "Running command: '${cmd[*]}'"
+        "${cmd[@]}"
+    done
+}
+
+installer.run_installer(){
+    local \
+        scripts
+    scripts=("${@}")
+    installer.log_debug "in installer.run_install(${scripts[*]})"
+    [[ "${#scripts[@]}" -gt 1 ]] \
+    || installer.die $? "argument must contain at least 2 elements"
+    installer.install_files "${scripts[@]}"
+    installer.make_desktop_entry \
+        "${scripts[1]}" \
+        "$HOME/.config/autostart"
+}

irssi-notifier.sh

@@ -1,6 +1,13 @@
-#!/bin/bash
-NLPID=`pgrep -u $UID notify-listener`
-if [ ! -z "$NLPID" ]; then
-    DSBA=`cat /proc/$NLPID/environ | tr '\0' '\n' | grep DBUS_SESSION_BUS_ADDRESS | cut -d '=' -f2-`
-    DBUS_SESSION_BUS_ADDRESS=$DSBA exec "$@"
-fi
+#!/usr/bin/env bash
+# get the notify-listener's PID:
+NLPID=$(pgrep -u "${UID}" notify-listener) || exit 0
+# take its DBUS_SESSION_BUS_ADDRESS expression:
+DBUS_SESSION_BUS_ADDRESS_EXPR=$(
+	xargs \
+		--null \
+		--max-args=1 \
+		echo < "/proc/${NLPID}/environ" \
+	| grep DBUS_SESSION_BUS_ADDRESS
+) || exit 0
+# set our DBUS_SESSION_BUS_ADDRESS to the one we've found above:
+DBUS_SESSION_BUS_ADDRESS="${DBUS_SESSION_BUS_ADDRESS_EXPR#*=}" exec "$@"