#!/usr/bin/env bash

# Commits to a local git repository with a timestamp different from when it was
# actually committed. I use this to push old projects with more relevant dates
# (i.e. when they were authored) and to correct clerical mistakes involving lost
# or accidental commits.
#
# Example: git old-commit "-5 years -2 months -11 days -1 hours -19 seconds" "commit message here"

D="$(date --date="$1")"
shift
GIT_COMMITTER_DATE="$D" GIT_AUTHOR_DATE="$D" git commit $@