first pass at a build-addon script

Author: clouserw

.gitignore

@@ -1,5 +1,6 @@
 node_modules/
-web-ext-artifacts/
+signed-addon.xpi
 src/vendor/*
 src/sidebar/vendor/*
 src/_locales
+web-ext-artifacts/

bin/build-addon.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+set -ex
+npm install
+
+if [[ -z $TESTPILOT_AMO_USER || -z $TESTPILOT_AMO_SECRET ]]; then
+    # Could build the development package here if you want
+    exit 1
+
+else
+    # for the locales
+    npm run build
+    # get rid of the unsigned xpi
+    rm -f ./web-ext-artifacts/*.xpi
+
+    ./node_modules/.bin/web-ext sign \
+    --source-dir src \
+    --api-key $TESTPILOT_AMO_USER \
+    --api-secret $TESTPILOT_AMO_SECRET
+    mv ./web-ext-artifacts/*.xpi ./signed-addon.xpi
+
+fi