From d821c496253b585ad2a9c6a957c2e669b77b19c7 Mon Sep 17 00:00:00 2001
From: Emanuele Petriglia <inbox@emanuelepetriglia.me>
Date: Sat, 16 Jun 2018 10:59:25 +0200
Subject: [PATCH] Add help and version messages

---
 updater.sh | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/updater.sh b/updater.sh
index e55793b..ce02c57 100755
--- a/updater.sh
+++ b/updater.sh
@@ -15,6 +15,7 @@ QUIET="false"
 VERBOSE="false"
 FORCE_VERSION="false"
 UPDATED="false"
+VERSION="1.4"
 
 # Prints a message to the standard error and exit with error code 1.
 error() {
@@ -57,12 +58,31 @@ update_installer() {
 
 # Prints to the standard output the help message.
 show_help() {
-  echo "ciao"
+  show_version
+  cat <<-_EOF
+Usage:
+    $PROGRAM [--update,-u] [--verbose] [--quiet,-q] [--force-version,-f]
+               [--help,-h] [--version,-v]
+
+Options:
+    -u, --update        First updates the updater script, then the user.js
+    --force-version, -f Force to download the user.js according to the
+                        Firefox version
+    --quiet, -q         Print only errors
+    --verbose           Print additional informations
+    --help              Print this message
+    --version           Print script version
+
+Please note that it is not given the option '--force-version' this script will
+download the latest version available, that can be unstable.
+
+Please report bugs to https://github.com/ghacksuserjs/ghacks-user.js/issues
+_EOF
 }
 
 # Prints to the standard output the version of this script.
 show_version() {
-  echo "$PROGRAM version 1.4"
+  echo "$PROGRAM for ghacks-user.js version $VERSION"
 }
 
 # Updates the user.js.