require-clean-work-tree.sh

   1 #!/usr/bin/env bash
   2
   3 # VonC CC BY-SA 4.0
   4 # https://stackoverflow.com/a/3879077
   5 # https://creativecommons.org/licenses/by-sa/4.0/
   6
   7     # Update the index
   8     git update-index -q --ignore-submodules --refresh
   9     err=0
  10
  11     # Disallow unstaged changes in the working tree
  12     if ! git diff-files --quiet --ignore-submodules --
  13     then
  14         echo >&2 "cannot $1: you have unstaged changes."
  15         git diff-files --name-status -r --ignore-submodules -- >&2
  16         err=1
  17     fi
  18
  19     # Disallow uncommitted changes in the index
  20     if ! git diff-index --cached --quiet HEAD --ignore-submodules --
  21     then
  22         echo >&2 "cannot $1: your index contains uncommitted changes."
  23         git diff-index --cached --name-status -r --ignore-submodules HEAD -- >&2
  24         err=1
  25     fi
  26
  27     if [ $err = 1 ]
  28     then
  29         echo >&2 "Please commit or stash them."
  30         exit 1
  31     fi