Automate git rebase -i to remove selected commits

auto_rebase_i.sh

# Perl onliner is used to delete selected commits from the git rebase -i commit text
# The range of commits includes extra commit to prevent git from doing noop when
# all commits after certain point are to be backed out.
# Some notes on the Perl onliner:
#  -n: run the script as specified by -e in the while(<>) loop
#  -i: modify the file inplace
#  -e: command to run
env GIT_SEQUENCE_EDITOR="perl -ni -e 'print unless /^pick (7d105ae|08fe503|97bf990)/'" git rebase -i <earliest_commit_to_backout>^^