Add travis CI script to auto-update homebrew formula

.travis.yml

@@ -0,0 +1,13 @@
+language: generic
+addons:
+  apt:
+    packages:
+      - zsh
+deploy:
+  provider: script
+  script: scripts/update-homebrew.zsh $TRAVIS_TAG
+  on:
+    tags: true
+env:
+  global:
+    secure: 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

scripts/update-homebrew.zsh

@@ -0,0 +1,60 @@
+#!/usr/bin/env zsh
+
+function update_homebrew() {
+  local version="$1"
+  local url="https://github.com/molovo/revolver/archive/$version.tar.gz"
+  local -a sumcmds; sumcmds=(sha256sum gsha256sum)
+  local sumcmd
+
+  if [[ -z $GH_TOKEN ]]; then
+    echo '\033[0;31mGithub repo token not found\033[0;m'
+    exit 1
+  fi
+
+  if [[ -z $version ]]; then
+    echo '\033[0;31mMust supply a version\033[0;m'
+    exit 1
+  fi
+
+  for cmd in $sumcmds; do
+    if type -p $cmd >/dev/null 2>&1; then
+      sumcmd=$cmd
+      break
+    fi
+  done
+
+  if [[ -z $sumcmd ]]; then
+    echo '\033[0;31mUnable to find sha256sum\033[0;m'
+    exit 1
+  fi
+
+  wget $url
+  local sum=($($sumcmd $version.tar.gz))
+  sum=${sum[1]}
+  local oldIFS=$IFS
+  IFS=$'\n'
+  local formula=($(cat ./Formula/revolver.rb))
+  for line in "${(@f)formula}"; do
+    if [[ "$line" =~ '^([ ]+)?url \".*\"' ]]; then
+      echo "  url \"$url\"" >> tmpfile
+      continue
+    fi
+
+    if [[ "$line" =~ '^([ ]+)?sha256 \".*\"' ]]; then
+      echo "  sha256 \"$sum\"" >> tmpfile
+      continue
+    fi
+
+    echo $line >> tmpfile
+  done
+  IFS=$oldIFS
+
+  mv tmpfile ./Formula/revolver.rb
+
+  git remote add deploy https://${GH_TOKEN}@github.com/molovo/revolver.git >/dev/null 2>&1
+  git add ./Formula/revolver.rb
+  git commit -m "Update homebrew formula"
+  git push --quiet deploy master >/dev/null 2>&1
+}
+
+update_homebrew "$@"