Index: frontend/node_modules/open/xdg-open
===================================================================
--- frontend/node_modules/open/xdg-open	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/open/xdg-open	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,1066 @@
+#!/bin/sh
+#---------------------------------------------
+#   xdg-open
+#
+#   Utility script to open a URL in the registered default application.
+#
+#   Refer to the usage() function below for usage.
+#
+#   Copyright 2009-2010, Fathi Boudra <fabo@freedesktop.org>
+#   Copyright 2009-2010, Rex Dieter <rdieter@fedoraproject.org>
+#   Copyright 2006, Kevin Krammer <kevin.krammer@gmx.at>
+#   Copyright 2006, Jeremy White <jwhite@codeweavers.com>
+#
+#   LICENSE:
+#
+#   Permission is hereby granted, free of charge, to any person obtaining a
+#   copy of this software and associated documentation files (the "Software"),
+#   to deal in the Software without restriction, including without limitation
+#   the rights to use, copy, modify, merge, publish, distribute, sublicense,
+#   and/or sell copies of the Software, and to permit persons to whom the
+#   Software is furnished to do so, subject to the following conditions:
+#
+#   The above copyright notice and this permission notice shall be included
+#   in all copies or substantial portions of the Software.
+#
+#   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+#   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+#   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+#   THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+#   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+#   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+#   OTHER DEALINGS IN THE SOFTWARE.
+#
+#---------------------------------------------
+
+manualpage()
+{
+cat << _MANUALPAGE
+Name
+
+   xdg-open -- opens a file or URL in the user's preferred
+   application
+
+Synopsis
+
+   xdg-open { file | URL }
+
+   xdg-open { --help | --manual | --version }
+
+Description
+
+   xdg-open opens a file or URL in the user's preferred
+   application. If a URL is provided the URL will be opened in the
+   user's preferred web browser. If a file is provided the file
+   will be opened in the preferred application for files of that
+   type. xdg-open supports file, ftp, http and https URLs.
+
+   xdg-open is for use inside a desktop session only. It is not
+   recommended to use xdg-open as root.
+
+Options
+
+   --help
+          Show command synopsis.
+
+   --manual
+          Show this manual page.
+
+   --version
+          Show the xdg-utils version information.
+
+Exit Codes
+
+   An exit code of 0 indicates success while a non-zero exit code
+   indicates failure. The following failure codes can be returned:
+
+   1
+          Error in command line syntax.
+
+   2
+          One of the files passed on the command line did not
+          exist.
+
+   3
+          A required tool could not be found.
+
+   4
+          The action failed.
+
+See Also
+
+   xdg-mime(1), xdg-settings(1), MIME applications associations
+   specification
+
+Examples
+
+xdg-open 'http://www.freedesktop.org/'
+
+   Opens the freedesktop.org website in the user's default
+   browser.
+
+xdg-open /tmp/foobar.png
+
+   Opens the PNG image file /tmp/foobar.png in the user's default
+   image viewing application.
+_MANUALPAGE
+}
+
+usage()
+{
+cat << _USAGE
+   xdg-open -- opens a file or URL in the user's preferred
+   application
+
+Synopsis
+
+   xdg-open { file | URL }
+
+   xdg-open { --help | --manual | --version }
+
+_USAGE
+}
+
+#@xdg-utils-common@
+
+#----------------------------------------------------------------------------
+#   Common utility functions included in all XDG wrapper scripts
+#----------------------------------------------------------------------------
+
+DEBUG()
+{
+  [ -z "${XDG_UTILS_DEBUG_LEVEL}" ] && return 0;
+  [ ${XDG_UTILS_DEBUG_LEVEL} -lt $1 ] && return 0;
+  shift
+  echo "$@" >&2
+}
+
+# This handles backslashes but not quote marks.
+first_word()
+{
+    read first rest
+    echo "$first"
+}
+
+#-------------------------------------------------------------
+# map a binary to a .desktop file
+binary_to_desktop_file()
+{
+    search="${XDG_DATA_HOME:-$HOME/.local/share}:${XDG_DATA_DIRS:-/usr/local/share:/usr/share}"
+    binary="`which "$1"`"
+    binary="`readlink -f "$binary"`"
+    base="`basename "$binary"`"
+    IFS=:
+    for dir in $search; do
+        unset IFS
+        [ "$dir" ] || continue
+        [ -d "$dir/applications" ] || [ -d "$dir/applnk" ] || continue
+        for file in "$dir"/applications/*.desktop "$dir"/applications/*/*.desktop "$dir"/applnk/*.desktop "$dir"/applnk/*/*.desktop; do
+            [ -r "$file" ] || continue
+            # Check to make sure it's worth the processing.
+            grep -q "^Exec.*$base" "$file" || continue
+            # Make sure it's a visible desktop file (e.g. not "preferred-web-browser.desktop").
+            grep -Eq "^(NoDisplay|Hidden)=true" "$file" && continue
+            command="`grep -E "^Exec(\[[^]=]*])?=" "$file" | cut -d= -f 2- | first_word`"
+            command="`which "$command"`"
+            if [ x"`readlink -f "$command"`" = x"$binary" ]; then
+                # Fix any double slashes that got added path composition
+                echo "$file" | sed -e 's,//*,/,g'
+                return
+            fi
+        done
+    done
+}
+
+#-------------------------------------------------------------
+# map a .desktop file to a binary
+desktop_file_to_binary()
+{
+    search="${XDG_DATA_HOME:-$HOME/.local/share}:${XDG_DATA_DIRS:-/usr/local/share:/usr/share}"
+    desktop="`basename "$1"`"
+    IFS=:
+    for dir in $search; do
+        unset IFS
+        [ "$dir" ] && [ -d "$dir/applications" ] || [ -d "$dir/applnk" ] || continue
+        # Check if desktop file contains -
+        if [ "${desktop#*-}" != "$desktop" ]; then
+            vendor=${desktop%-*}
+            app=${desktop#*-}
+            if [ -r $dir/applications/$vendor/$app ]; then
+                file_path=$dir/applications/$vendor/$app
+            elif [ -r $dir/applnk/$vendor/$app ]; then
+                file_path=$dir/applnk/$vendor/$app
+            fi
+        fi
+        if test -z "$file_path" ; then
+            for indir in "$dir"/applications/ "$dir"/applications/*/ "$dir"/applnk/ "$dir"/applnk/*/; do
+                file="$indir/$desktop"
+                if [ -r "$file" ]; then
+                    file_path=$file
+                    break
+                fi
+            done
+        fi
+        if [ -r "$file_path" ]; then
+            # Remove any arguments (%F, %f, %U, %u, etc.).
+            command="`grep -E "^Exec(\[[^]=]*])?=" "$file_path" | cut -d= -f 2- | first_word`"
+            command="`which "$command"`"
+            readlink -f "$command"
+            return
+        fi
+    done
+}
+
+#-------------------------------------------------------------
+# Exit script on successfully completing the desired operation
+
+exit_success()
+{
+    if [ $# -gt 0 ]; then
+        echo "$@"
+        echo
+    fi
+
+    exit 0
+}
+
+
+#-----------------------------------------
+# Exit script on malformed arguments, not enough arguments
+# or missing required option.
+# prints usage information
+
+exit_failure_syntax()
+{
+    if [ $# -gt 0 ]; then
+        echo "xdg-open: $@" >&2
+        echo "Try 'xdg-open --help' for more information." >&2
+    else
+        usage
+        echo "Use 'man xdg-open' or 'xdg-open --manual' for additional info."
+    fi
+
+    exit 1
+}
+
+#-------------------------------------------------------------
+# Exit script on missing file specified on command line
+
+exit_failure_file_missing()
+{
+    if [ $# -gt 0 ]; then
+        echo "xdg-open: $@" >&2
+    fi
+
+    exit 2
+}
+
+#-------------------------------------------------------------
+# Exit script on failure to locate necessary tool applications
+
+exit_failure_operation_impossible()
+{
+    if [ $# -gt 0 ]; then
+        echo "xdg-open: $@" >&2
+    fi
+
+    exit 3
+}
+
+#-------------------------------------------------------------
+# Exit script on failure returned by a tool application
+
+exit_failure_operation_failed()
+{
+    if [ $# -gt 0 ]; then
+        echo "xdg-open: $@" >&2
+    fi
+
+    exit 4
+}
+
+#------------------------------------------------------------
+# Exit script on insufficient permission to read a specified file
+
+exit_failure_file_permission_read()
+{
+    if [ $# -gt 0 ]; then
+        echo "xdg-open: $@" >&2
+    fi
+
+    exit 5
+}
+
+#------------------------------------------------------------
+# Exit script on insufficient permission to write a specified file
+
+exit_failure_file_permission_write()
+{
+    if [ $# -gt 0 ]; then
+        echo "xdg-open: $@" >&2
+    fi
+
+    exit 6
+}
+
+check_input_file()
+{
+    if [ ! -e "$1" ]; then
+        exit_failure_file_missing "file '$1' does not exist"
+    fi
+    if [ ! -r "$1" ]; then
+        exit_failure_file_permission_read "no permission to read file '$1'"
+    fi
+}
+
+check_vendor_prefix()
+{
+    file_label="$2"
+    [ -n "$file_label" ] || file_label="filename"
+    file=`basename "$1"`
+    case "$file" in
+       [[:alpha:]]*-*)
+         return
+         ;;
+    esac
+
+    echo "xdg-open: $file_label '$file' does not have a proper vendor prefix" >&2
+    echo 'A vendor prefix consists of alpha characters ([a-zA-Z]) and is terminated' >&2
+    echo 'with a dash ("-"). An example '"$file_label"' is '"'example-$file'" >&2
+    echo "Use --novendor to override or 'xdg-open --manual' for additional info." >&2
+    exit 1
+}
+
+check_output_file()
+{
+    # if the file exists, check if it is writeable
+    # if it does not exists, check if we are allowed to write on the directory
+    if [ -e "$1" ]; then
+        if [ ! -w "$1" ]; then
+            exit_failure_file_permission_write "no permission to write to file '$1'"
+        fi
+    else
+        DIR=`dirname "$1"`
+        if [ ! -w "$DIR" ] || [ ! -x "$DIR" ]; then
+            exit_failure_file_permission_write "no permission to create file '$1'"
+        fi
+    fi
+}
+
+#----------------------------------------
+# Checks for shared commands, e.g. --help
+
+check_common_commands()
+{
+    while [ $# -gt 0 ] ; do
+        parm="$1"
+        shift
+
+        case "$parm" in
+            --help)
+            usage
+            echo "Use 'man xdg-open' or 'xdg-open --manual' for additional info."
+            exit_success
+            ;;
+
+            --manual)
+            manualpage
+            exit_success
+            ;;
+
+            --version)
+            echo "xdg-open 1.1.3"
+            exit_success
+            ;;
+        esac
+    done
+}
+
+check_common_commands "$@"
+
+[ -z "${XDG_UTILS_DEBUG_LEVEL}" ] && unset XDG_UTILS_DEBUG_LEVEL;
+if [ ${XDG_UTILS_DEBUG_LEVEL-0} -lt 1 ]; then
+    # Be silent
+    xdg_redirect_output=" > /dev/null 2> /dev/null"
+else
+    # All output to stderr
+    xdg_redirect_output=" >&2"
+fi
+
+#--------------------------------------
+# Checks for known desktop environments
+# set variable DE to the desktop environments name, lowercase
+
+detectDE()
+{
+    # see https://bugs.freedesktop.org/show_bug.cgi?id=34164
+    unset GREP_OPTIONS
+
+    if [ -n "${XDG_CURRENT_DESKTOP}" ]; then
+      case "${XDG_CURRENT_DESKTOP}" in
+         # only recently added to menu-spec, pre-spec X- still in use
+         Cinnamon|X-Cinnamon)
+           DE=cinnamon;
+           ;;
+         ENLIGHTENMENT)
+           DE=enlightenment;
+           ;;
+         # GNOME, GNOME-Classic:GNOME, or GNOME-Flashback:GNOME
+         GNOME*)
+           DE=gnome;
+           ;;
+         KDE)
+           DE=kde;
+           ;;
+         # Deepin Desktop Environments
+         DEEPIN|Deepin|deepin)
+           DE=dde;
+           ;;
+         LXDE)
+           DE=lxde;
+           ;;
+         LXQt)
+           DE=lxqt;
+           ;;
+         MATE)
+           DE=mate;
+           ;;
+         XFCE)
+           DE=xfce
+           ;;
+         X-Generic)
+           DE=generic
+           ;;
+      esac
+    fi
+
+    if [ x"$DE" = x"" ]; then
+      # classic fallbacks
+      if [ x"$KDE_FULL_SESSION" != x"" ]; then DE=kde;
+      elif [ x"$GNOME_DESKTOP_SESSION_ID" != x"" ]; then DE=gnome;
+      elif [ x"$MATE_DESKTOP_SESSION_ID" != x"" ]; then DE=mate;
+      elif `dbus-send --print-reply --dest=org.freedesktop.DBus /org/freedesktop/DBus org.freedesktop.DBus.GetNameOwner string:org.gnome.SessionManager > /dev/null 2>&1` ; then DE=gnome;
+      elif xprop -root _DT_SAVE_MODE 2> /dev/null | grep ' = \"xfce4\"$' >/dev/null 2>&1; then DE=xfce;
+      elif xprop -root 2> /dev/null | grep -i '^xfce_desktop_window' >/dev/null 2>&1; then DE=xfce
+      elif echo $DESKTOP | grep -q '^Enlightenment'; then DE=enlightenment;
+      elif [ x"$LXQT_SESSION_CONFIG" != x"" ]; then DE=lxqt;
+      fi
+    fi
+
+    if [ x"$DE" = x"" ]; then
+      # fallback to checking $DESKTOP_SESSION
+      case "$DESKTOP_SESSION" in
+         gnome)
+           DE=gnome;
+           ;;
+         LXDE|Lubuntu)
+           DE=lxde; 
+           ;;
+         MATE)
+           DE=mate;
+           ;;
+         xfce|xfce4|'Xfce Session')
+           DE=xfce;
+           ;;
+      esac
+    fi
+
+    if [ x"$DE" = x"" ]; then
+      # fallback to uname output for other platforms
+      case "$(uname 2>/dev/null)" in 
+        CYGWIN*)
+          DE=cygwin;
+          ;;
+        Darwin)
+          DE=darwin;
+          ;;
+      esac
+    fi
+
+    if [ x"$DE" = x"gnome" ]; then
+      # gnome-default-applications-properties is only available in GNOME 2.x
+      # but not in GNOME 3.x
+      which gnome-default-applications-properties > /dev/null 2>&1  || DE="gnome3"
+    fi
+
+    if [ -f "$XDG_RUNTIME_DIR/flatpak-info" ]; then
+      DE="flatpak"
+    fi
+}
+
+#----------------------------------------------------------------------------
+# kfmclient exec/openURL can give bogus exit value in KDE <= 3.5.4
+# It also always returns 1 in KDE 3.4 and earlier
+# Simply return 0 in such case
+
+kfmclient_fix_exit_code()
+{
+    version=`LC_ALL=C.UTF-8 kde-config --version 2>/dev/null | grep '^KDE'`
+    major=`echo $version | sed 's/KDE.*: \([0-9]\).*/\1/'`
+    minor=`echo $version | sed 's/KDE.*: [0-9]*\.\([0-9]\).*/\1/'`
+    release=`echo $version | sed 's/KDE.*: [0-9]*\.[0-9]*\.\([0-9]\).*/\1/'`
+    test "$major" -gt 3 && return $1
+    test "$minor" -gt 5 && return $1
+    test "$release" -gt 4 && return $1
+    return 0
+}
+
+#----------------------------------------------------------------------------
+# Returns true if there is a graphical display attached.
+
+has_display()
+{
+    if [ -n "$DISPLAY" ] || [ -n "$WAYLAND_DISPLAY" ]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# This handles backslashes but not quote marks.
+last_word()
+{
+    read first rest
+    echo "$rest"
+}
+
+# Get the value of a key in a desktop file's Desktop Entry group.
+# Example: Use get_key foo.desktop Exec
+# to get the values of the Exec= key for the Desktop Entry group.
+get_key()
+{
+    local file="${1}"
+    local key="${2}"
+    local desktop_entry=""
+
+    IFS_="${IFS}"
+    IFS=""
+    while read line
+    do
+        case "$line" in
+            "[Desktop Entry]")
+                desktop_entry="y"
+            ;;
+            # Reset match flag for other groups
+            "["*)
+                desktop_entry=""
+            ;;
+            "${key}="*)
+                # Only match Desktop Entry group
+                if [ -n "${desktop_entry}" ]
+                then
+                    echo "${line}" | cut -d= -f 2-
+                fi
+        esac
+    done < "${file}"
+    IFS="${IFS_}"
+}
+
+# Returns true if argument is a file:// URL or path
+is_file_url_or_path()
+{
+    if echo "$1" | grep -q '^file://' \
+            || ! echo "$1" | egrep -q '^[[:alpha:]+\.\-]+:'; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# If argument is a file URL, convert it to a (percent-decoded) path.
+# If not, leave it as it is.
+file_url_to_path()
+{
+    local file="$1"
+    if echo "$file" | grep -q '^file:///'; then
+        file=${file#file://}
+        file=${file%%#*}
+        file=$(echo "$file" | sed -r 's/\?.*$//')
+        local printf=printf
+        if [ -x /usr/bin/printf ]; then
+            printf=/usr/bin/printf
+        fi
+        file=$($printf "$(echo "$file" | sed -e 's@%\([a-f0-9A-F]\{2\}\)@\\x\1@g')")
+    fi
+    echo "$file"
+}
+
+open_cygwin()
+{
+    cygstart "$1"
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_darwin()
+{
+    open "$1"
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_kde()
+{
+    if [ -n "${KDE_SESSION_VERSION}" ]; then
+      case "${KDE_SESSION_VERSION}" in
+        4)
+          kde-open "$1"
+        ;;
+        5)
+          kde-open${KDE_SESSION_VERSION} "$1"
+        ;;
+      esac
+    else
+        kfmclient exec "$1"
+        kfmclient_fix_exit_code $?
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_dde()
+{
+    if dde-open -version >/dev/null 2>&1; then
+        dde-open "$1"
+    else
+        open_generic "$1"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_gnome3()
+{
+    if gio help open 2>/dev/null 1>&2; then
+        gio open "$1"
+    elif gvfs-open --help 2>/dev/null 1>&2; then
+        gvfs-open "$1"
+    else
+        open_generic "$1"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_gnome()
+{
+    if gio help open 2>/dev/null 1>&2; then
+        gio open "$1"
+    elif gvfs-open --help 2>/dev/null 1>&2; then
+        gvfs-open "$1"
+    elif gnome-open --help 2>/dev/null 1>&2; then
+        gnome-open "$1"
+    else
+        open_generic "$1"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_mate()
+{
+    if gio help open 2>/dev/null 1>&2; then
+        gio open "$1"
+    elif gvfs-open --help 2>/dev/null 1>&2; then
+        gvfs-open "$1"
+    elif mate-open --help 2>/dev/null 1>&2; then
+        mate-open "$1"
+    else
+        open_generic "$1"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_xfce()
+{
+    if exo-open --help 2>/dev/null 1>&2; then
+        exo-open "$1"
+    elif gio help open 2>/dev/null 1>&2; then
+        gio open "$1"
+    elif gvfs-open --help 2>/dev/null 1>&2; then
+        gvfs-open "$1"
+    else
+        open_generic "$1"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_enlightenment()
+{
+    if enlightenment_open --help 2>/dev/null 1>&2; then
+        enlightenment_open "$1"
+    else
+        open_generic "$1"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_flatpak()
+{
+    gdbus call --session \
+        --dest org.freedesktop.portal.Desktop \
+        --object-path /org/freedesktop/portal/desktop \
+        --method org.freedesktop.portal.OpenURI.OpenURI \
+        "" "$1" {}
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+#-----------------------------------------
+# Recursively search .desktop file
+
+search_desktop_file()
+{
+    local default="$1"
+    local dir="$2"
+    local target="$3"
+
+    local file=""
+    # look for both vendor-app.desktop, vendor/app.desktop
+    if [ -r "$dir/$default" ]; then
+      file="$dir/$default"
+    elif [ -r "$dir/`echo $default | sed -e 's|-|/|'`" ]; then
+      file="$dir/`echo $default | sed -e 's|-|/|'`"
+    fi
+
+    if [ -r "$file" ] ; then
+        command="$(get_key "${file}" "Exec" | first_word)"
+        command_exec=`which $command 2>/dev/null`
+        icon="$(get_key "${file}" "Icon")"
+        # FIXME: Actually LC_MESSAGES should be used as described in
+        # http://standards.freedesktop.org/desktop-entry-spec/latest/ar01s04.html
+        localised_name="$(get_key "${file}" "Name")"
+        set -- $(get_key "${file}" "Exec" | last_word)
+        # We need to replace any occurrence of "%f", "%F" and
+        # the like by the target file. We examine each
+        # argument and append the modified argument to the
+        # end then shift.
+        local args=$#
+        local replaced=0
+        while [ $args -gt 0 ]; do
+            case $1 in
+                %[c])
+                    replaced=1
+                    arg="${localised_name}"
+                    shift
+                    set -- "$@" "$arg"
+                    ;;
+                %[fFuU])
+                    replaced=1
+                    arg="$target"
+                    shift
+                    set -- "$@" "$arg"
+                    ;;
+                %[i])
+                    replaced=1
+                    shift
+                    set -- "$@" "--icon" "$icon"
+                    ;;
+                *)
+                    arg="$1"
+                    shift
+                    set -- "$@" "$arg"
+                    ;;
+            esac
+            args=$(( $args - 1 ))
+        done
+        [ $replaced -eq 1 ] || set -- "$@" "$target"
+        "$command_exec" "$@"
+
+        if [ $? -eq 0 ]; then
+            exit_success
+        fi
+    fi
+
+    for d in $dir/*/; do
+        [ -d "$d" ] && search_desktop_file "$default" "$d" "$target"
+    done
+}
+
+
+open_generic_xdg_mime()
+{
+    filetype="$2"
+    default=`xdg-mime query default "$filetype"`
+    if [ -n "$default" ] ; then
+        xdg_user_dir="$XDG_DATA_HOME"
+        [ -n "$xdg_user_dir" ] || xdg_user_dir="$HOME/.local/share"
+
+        xdg_system_dirs="$XDG_DATA_DIRS"
+        [ -n "$xdg_system_dirs" ] || xdg_system_dirs=/usr/local/share/:/usr/share/
+
+DEBUG 3 "$xdg_user_dir:$xdg_system_dirs"
+        for x in `echo "$xdg_user_dir:$xdg_system_dirs" | sed 's/:/ /g'`; do
+            search_desktop_file "$default" "$x/applications/" "$1"
+        done
+    fi
+}
+
+open_generic_xdg_file_mime()
+{
+    filetype=`xdg-mime query filetype "$1" | sed "s/;.*//"`
+    open_generic_xdg_mime "$1" "$filetype"
+}
+
+open_generic_xdg_x_scheme_handler()
+{
+    scheme="`echo $1 | sed -n 's/\(^[[:alnum:]+\.-]*\):.*$/\1/p'`"
+    if [ -n $scheme ]; then
+        filetype="x-scheme-handler/$scheme"
+        open_generic_xdg_mime "$1" "$filetype"
+    fi
+}
+
+has_single_argument()
+{
+  test $# = 1
+}
+
+open_envvar()
+{
+    local oldifs="$IFS"
+    local browser browser_with_arg
+
+    IFS=":"
+    for browser in $BROWSER; do
+        IFS="$oldifs"
+
+        if [ -z "$browser" ]; then
+            continue
+        fi
+
+        if echo "$browser" | grep -q %s; then
+            # Avoid argument injection.
+            # See https://bugs.freedesktop.org/show_bug.cgi?id=103807
+            # URIs don't have IFS characters spaces anyway.
+            has_single_argument $1 && $(printf "$browser" "$1")
+        else
+            $browser "$1"
+        fi
+
+        if [ $? -eq 0 ]; then
+            exit_success
+        fi
+    done
+}
+
+open_generic()
+{
+    if is_file_url_or_path "$1"; then
+        local file="$(file_url_to_path "$1")"
+
+        check_input_file "$file"
+
+        if has_display; then
+            filetype=`xdg-mime query filetype "$file" | sed "s/;.*//"`
+            open_generic_xdg_mime "$file" "$filetype"
+        fi
+
+        if which run-mailcap 2>/dev/null 1>&2; then
+            run-mailcap --action=view "$file"
+            if [ $? -eq 0 ]; then
+                exit_success
+            fi
+        fi
+
+        if has_display && mimeopen -v 2>/dev/null 1>&2; then
+            mimeopen -L -n "$file"
+            if [ $? -eq 0 ]; then
+                exit_success
+            fi
+        fi
+    fi
+
+    if has_display; then
+        open_generic_xdg_x_scheme_handler "$1"
+    fi
+
+    if [ -n "$BROWSER" ]; then
+        open_envvar "$1"
+    fi
+
+    # if BROWSER variable is not set, check some well known browsers instead
+    if [ x"$BROWSER" = x"" ]; then
+        BROWSER=www-browser:links2:elinks:links:lynx:w3m
+        if has_display; then
+            BROWSER=x-www-browser:firefox:iceweasel:seamonkey:mozilla:epiphany:konqueror:chromium:chromium-browser:google-chrome:microsoft-edge:$BROWSER
+        fi
+    fi
+
+    open_envvar "$1"
+
+    exit_failure_operation_impossible "no method available for opening '$1'"
+}
+
+open_lxde()
+{
+
+    # pcmanfm only knows how to handle file:// urls and filepaths, it seems.
+    if pcmanfm --help >/dev/null 2>&1 && is_file_url_or_path "$1"; then
+        local file="$(file_url_to_path "$1")"
+
+        # handle relative paths
+        if ! echo "$file" | grep -q ^/; then
+            file="$(pwd)/$file"
+        fi
+
+        pcmanfm "$file"
+    else
+        open_generic "$1"
+    fi
+
+    if [ $? -eq 0 ]; then
+        exit_success
+    else
+        exit_failure_operation_failed
+    fi
+}
+
+open_lxqt()
+{
+    open_generic "$1"
+}
+
+[ x"$1" != x"" ] || exit_failure_syntax
+
+url=
+while [ $# -gt 0 ] ; do
+    parm="$1"
+    shift
+
+    case "$parm" in
+      -*)
+        exit_failure_syntax "unexpected option '$parm'"
+        ;;
+
+      *)
+        if [ -n "$url" ] ; then
+            exit_failure_syntax "unexpected argument '$parm'"
+        fi
+        url="$parm"
+        ;;
+    esac
+done
+
+if [ -z "${url}" ] ; then
+    exit_failure_syntax "file or URL argument missing"
+fi
+
+detectDE
+
+if [ x"$DE" = x"" ]; then
+    DE=generic
+fi
+
+DEBUG 2 "Selected DE $DE"
+
+# sanitize BROWSER (avoid caling ourselves in particular)
+case "${BROWSER}" in
+    *:"xdg-open"|"xdg-open":*)
+        BROWSER=$(echo $BROWSER | sed -e 's|:xdg-open||g' -e 's|xdg-open:||g')
+        ;;
+    "xdg-open")
+        BROWSER=
+        ;;
+esac
+
+case "$DE" in
+    kde)
+    open_kde "$url"
+    ;;
+
+    dde)
+    open_dde "$url"
+    ;;
+
+    gnome3|cinnamon)
+    open_gnome3 "$url"
+    ;;
+
+    gnome)
+    open_gnome "$url"
+    ;;
+
+    mate)
+    open_mate "$url"
+    ;;
+
+    xfce)
+    open_xfce "$url"
+    ;;
+
+    lxde)
+    open_lxde "$url"
+    ;;
+
+    lxqt)
+    open_lxqt "$url"
+    ;;
+
+    enlightenment)
+    open_enlightenment "$url"
+    ;;
+
+    cygwin)
+    open_cygwin "$url"
+    ;;
+
+    darwin)
+    open_darwin "$url"
+    ;;
+
+    flatpak)
+    open_flatpak "$url"
+    ;;
+
+    generic)
+    open_generic "$url"
+    ;;
+
+    *)
+    exit_failure_operation_impossible "no method available for opening '$url'"
+    ;;
+esac