git-tag-release

#!/bin/sh

CURRENT_BRANCH=`git symbolic-ref HEAD --short`
CURRENT_TAG=$(echo $CURRENT_BRANCH | cut -d '/' -f 2)

# If the "cut" doesn't actually split anything, it returns the given string
test $CURRENT_BRANCH = $CURRENT_TAG && echo "Error: could not infer version." 1>&2 && exit 1

DEPLOYER=`git config user.email`
CURRENT_TIME=`date +%Y-%m-%dT%H:%M:%S%z`

# These are all run in sequence using '&&' at the end of each line. Broken
# out into separate lines and chunks to make it easier to read.

echo "Tagging release:" &&
  # Create and push tag
  git tag --force --annotate $CURRENT_TAG -m "Deployed by ${DEPLOYER} at ${CURRENT_TIME}" &&
  git push origin --tags &&

  # Reset master to tag
  git checkout master &&
  git reset --hard $CURRENT_TAG &&
  git push --force origin master &&

  # Merge release into develop
  git checkout develop &&
  git pull &&
  git merge $CURRENT_BRANCH &&
  git push &&

  # Destroy release branch
  git branch -d $CURRENT_BRANCH &&
  git push origin --delete $CURRENT_BRANCH