Automate the release process.

Make it less likely that I'll forget to do something.

Author: olivernn

build/release.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+
+file_has_changed () {
+  if [ ! -f $1 ]; then
+    return 1
+  fi
+
+  for f in `git ls-files --modified`; do
+    [[ "$f" == "$1" ]] && return 0
+  done
+
+  return 1
+}
+
+version_is_unique () {
+  for v in `git tag -l`; do
+    [[ "$v" == "v$1" ]] && return 1
+  done
+
+  return 0
+}
+
+on_master_branch () {
+  [[ $(git symbolic-ref --short -q HEAD) == "master" ]] && return 0
+  return 1
+}
+
+version=$(cat VERSION)
+previous_version=$(git tag -l | tail -n 1)
+
+if ! on_master_branch; then
+  echo -e "\033[0;31mRefusing to release from non master branch.\033[0m"
+  exit 1
+fi
+
+if ! file_has_changed "VERSION"; then
+  echo -e "\033[0;31mRefusing to release because VERSION has not changed.\033[0m"
+  exit 1
+fi
+
+if ! file_has_changed "CHANGELOG.mdown"; then
+  echo -e "\033[0;31mRefusing to release because CHANGELOG.ms has not been updated.\033[0m"
+  exit 1
+fi
+
+if ! file_has_changed "package.json"; then
+  echo -e "\033[0;31mRefusing to release because package.json has not been updated.\033[0m"
+  exit 1
+fi
+
+if ! version_is_unique $version; then
+  echo -e "\033[0;31mRefusing to release because VERSION is not unique.\033[0m"
+  exit 1
+fi
+
+echo -e "\033[1mAbout to release v$version with the following changes:\033[0m"
+git log --date=short --pretty=format:"%ad %h%x09%an%x09%s" $previous_version..HEAD
+
+echo
+
+echo -e "\033[1mThe following files will be part of the release commit:\033[0m"
+git ls-files --modified
+
+echo
+
+read -e -p "Are you sure you want to release? " -n 1 -r
+echo
+if [[ $REPLY =~ ^[Yy]$ ]]; then
+  echo -e "\033[0;32mReleasing...\033[0m"
+  echo
+  git commit -a -m "Build version $version"
+  git tag -a v$version -m "Version $version"
+  git push origin master
+  git push --tags
+
+  npm publish
+else
+  echo -e "\033[0;31mCancelling...\033[0m"
+fi