A "simple" node.js deployment script - runs npm install, bower install, and gulp build, before starting using a forever config file. Will report the status of the deployment back to slack, as well as posting errors where appropriate.

deploy.sh

#!/bin/bash

###### Deploy Vars ######

# The deployment root path
DEPLOYROOT=/home/node/deploy/
FOREVERCONFIG=./forever.json
CURLCHECKURL=http://localhost/
BITBUCKET=https://bitbucket.org/user/repo
MAINURL=http://webhost.com/
ERRORCOLOR="D00000"
SUCCESSCOLOR="006400"

# Slack config
SLACKHOOK=
SLACKCHANNEL=channel_name
SLACKUSERNAME="Deployment Robot"
SLACKEMOJI=musical_score
SLACKERROREMOJI=bangbang

# Run parameters
RUNMODE=production
HOSTNAME=

# Application paths
FOREVERPATH=/usr/local/bin/forever
NPMPATH=/usr/local/bin/npm
BOWERPATH=/usr/local/bin/bower
GULPPATH=/usr/local/bin/gulp
GITPATH=/usr/bin/git
FORTUNEPATH=/usr/games/fortune
CURLPATH=/usr/bin/curl
DATEPATH=/bin/date
GREPPATH=/bin/grep

###### END DEPLOY VARS ######

START=$($DATEPATH +%s.%N)

cd $DEPLOYROOT
$GITPATH remote update

LOCAL=$($GITPATH rev-parse @)
REMOTE=$($GITPATH rev-parse @{u})
BASE=$($GITPATH merge-base @ @{u})

if [[ "$@" != 'force' ]]; then
  if [ $LOCAL = $REMOTE ]; then
      exit;
  elif [ $LOCAL = $BASE ]; then
    #do nothing
    echo "Proceed with deployment"
  elif [ $REMOTE = $BASE ]; then
      exit;
  else
      exit;
  fi
fi


#do the thing
$GITPATH pull
LOCALNEW=$($GITPATH rev-parse @)

if [ $LOCALNEW != $REMOTE ]; then
  $CURLPATH -X POST --data-urlencode "payload={\"channel\": \"#$SLACKCHANNEL\", \"username\": \"$SLACKUSERNAME\", \"text\": \"*Error Deploying:* <$BITBUCKET/commits/$REMOTE|${REMOTE:0:7}> to <$MAINURL|Production>. Check the server.\", \"icon_emoji\": \":$SLACKERROREMOJI:\"}" $SLACKHOOK
else
  # stop the processes
  $FOREVERPATH stopall

  #get the missing dependancies
  MISSINGNPMDEPS=$({ $NPMPATH list > /tmp/deps; } 2>&1 | $GREPPATH 'missing:' | $GREPPATH -Po '(?<=missing: )[^@]+')
  $NPMPATH install
  MISSINGBOWDEPS=$($BOWERPATH install | $GREPPATH '  install ' | $GREPPATH -Po '(?<=bower )[^ ]+')
  $BOWERPATH install
  $GULPPATH build
  HOST=$HOSTNAME NODE_ENV=$RUNMODE $FOREVERPATH start $FOREVERCONFIG

  ATTACHMENTJSON=""
  NPMJSON="{}"
  BOWJSON="{}"
  if [ ! -z "$MISSINGNPMDEPS" ]; then
    NPMJSON="{\"title\":\"NPM\",\"value\":\"$MISSINGNPMDEPS\",\"short\":true}"
  fi
  if [ ! -z "$MISSINGBOWDEPS" ]; then
    BOWJSON="{\"title\":\"Bower\",\"value\":\"$MISSINGBOWDEPS\",\"short\":true}"
  fi
  if [ ! -z "$MISSINGNPMDEPS" ] || [ ! -z "$MISSINGBOWDEPS"]; then
    ATTACHMENTJSON=",$NPMJSON, $BOWJSON"
  fi

  END=$($DATEPATH +%s.%N)
  DIFF=$(echo "$END - $START" | bc)
  TDIFF=$(printf %.$2f $DIFF)

  GITMSG=$($GITPATH log -1 --pretty=%B)
  GITCOMMITTER=$($GITPATH log -1 --pretty=%cn)
  GITBRANCH=$($GITPATH rev-parse --abbrev-ref HEAD)

  BOFHEXCUSE=$($FORTUNEPATH | tail -n 1)

  sleep 5s
  CURLERR=$($CURLPATH -s -w %{http_code} $CURLCHECKURL -o /dev/null)
  COLOR=$SUCCESSCOLOR
  CURLATT="{\"title\":\"Curl Check\",\"value\":\"Response code $CURLERR; all good in the hood.\",\"short\":true}"
  if [ '200' != $CURLERR ] && [ '302' != $CURLERR ]; then
    CURLATT="{\"title\":\"Curl Check\",\"value\":\"Response code $CURLERR; STRANGER DANGER! Check It.\",\"short\":true}"
    COLOR=$ERRORCOLOR
  fi

  $CURLPATH -X POST --data-urlencode "payload={\"channel\": \"#$SLACKCHANNEL\", \"username\": \"$SLACKUSERNAME\", \"text\": \"*Deployed:* <$BITBUCKET/commits/$REMOTE|${REMOTE:0:7}> to <$MAINURL|Production>\", \"icon_emoji\": \":$SLACKEMOJI:\" ,\"attachments\": [{\"fallback\":\"Deployed ${REMOTE:0:7}\",\"color\":\"#$COLOR\",\"fields\":[{\"title\":\"Note\",\"value\":\"$GITMSG\",\"short\":false},{\"title\":\"Committer\",\"value\":\"$GITCOMMITTER\",\"short\":true},{\"title\":\"Time Taken\",\"value\":\"About $TDIFF seconds\",\"short\":true},{\"title\":\"Branch\",\"value\":\"$GITBRANCH\",\"short\":true},$CURLATT$ATTACHMENTJSON,{\"title\":\"Reason it doesn't work\",\"value\":\"$BOFHEXCUSE\",\"short\":false}]}]}" $SLACKHOOK

fi