View the past and present state of deployed files in a git repo.

gitat.sh

# gitat
# View the past and present state of deployed files in a git repo.
# 
# Usage:
#   1. prints file in currently deployed state
#     $ gitat path/to/file 
#   2. prints version of file deployed on May 20
#     $ gitat path/to/file 2013-05-20 
#   3. prints context around line 123 in version of file deployed on May 20
#     $ gitat path/to/file 2013-05-20 123
gitat () {
  git show origin/master@{$2}:$1 | cat -n | grep -C10 "${3}"
}