Add Unfurl to the prod installer

production/unfurl-build

@@ -0,0 +1,62 @@
+#!/usr/bin/env zsh
+PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:$HOME/bin
+HOSTNAME=$(hostname)
+LOCATION=$(hostname|cut -d . -f2)
+LOCKFILE="${HOME}/lock"
+REF=$(echo "${1:=origin/master}"|sed -e 's!:!/!')
+
+if [ -f "${LOCKFILE}" ];then
+    echo "upgrade already running? check lockfile ${LOCKFILE}"
+    exit 1
+fi
+
+# on exit, remove lockfile but preserve exit code
+trap "rv=\$?; rm -f "${LOCKFILE}"; exit \$rv" INT TERM EXIT
+
+# create lockfile
+touch "${LOCKFILE}"
+
+# notify logged in users
+echo "Upgrading unfurler to ${REF}" | wall
+
+update_repo()
+{
+    echo "[*] Upgrading unfurler to ${REF}"
+    cd "$HOME/unfurl/unfurler" || exit 1
+
+    git fetch origin || exit 1
+    for remote in origin;do
+        git remote add "${remote}" "https://github.com/${remote}/mempool" >/dev/null 2>&1
+        git fetch "${remote}" || exit 1
+    done
+
+    if [ $(git tag -l "${REF}") ];then
+        git reset --hard "tags/${REF}" || exit 1
+    elif [ $(git branch -r -l "origin/${REF}") ];then
+        git reset --hard "origin/${REF}" || exit 1
+    else
+        git reset --hard "${REF}" || exit 1
+    fi
+    export HASH=$(git rev-parse HEAD)
+}
+
+build_backend()
+{
+    echo "[*] Building backend for unfurler"
+    [ -z "${HASH}" ] && exit 1
+    cd "$HOME/unfurl/unfurler" || exit 1
+    if [ ! -e "config.json" ];then
+        cp "${HOME}/unfurl/production/mempool-config.unfurl.json" "config.json"
+    fi
+    npm install || exit 1
+    npm run build || exit 1
+}
+
+update_repo
+build_backend
+
+# notify everyone
+echo "${HOSTNAME} unfurl updated to \`${REF}\` @ \`${HASH}\`" | /usr/local/bin/keybase chat send --nonblock --channel general mempool.dev
+echo "${HOSTNAME} unfurl updated to \`${REF}\` @ \`${HASH}\`" | /usr/local/bin/keybase chat send --nonblock --channel general "mempool.ops.${LOCATION}"
+
+exit 0