Discard changes in git working directory that are only changes in case

dropcasechanges.sh

# This bash script can be used to drop changes in your git working directory that are only changes
# in upper/lowercase. This is useful if you are working on a case-insensitive document, such
# as a Visual Basic 6 source code file (ugh), and your tools accidentally change the case of
# words, but you want to revert that before making a commit. After this script finishes, your
# working directory has your changes except for those that were only changes in case.
# 
# This script takes the following actions:
#
# 1) Use "git difftool" with "diff -i" to run a case-insensitive diff on the
#   working directory and save that to a temporary patch file case_insensitive_changes.patch.
# 2) Use 'git stash' to discard all the changes in a safe way in the current directory and its subdirectories.
# 3) Apply the patch file, which has the case-insensitive changes only.
# 4) If that succeeded, drop the stash and delete the patch. (Your case changes are now gone forever.)
# 5) Otherwise, if it failed, restore what was discarded using "stash pop."
git difftool -yx "diff -iu" > case_insensitive_changes.patch \
  && git stash push . \
  && git apply -v -p0 - < case_insensitive_changes.patch \
  && rm case_insensitive_changes.patch \
  && git stash drop \
  || git stash pop