=comment

This info is copied from the old wiki page on Working with git:

Context diffs with Git

Copy git-external-diff into libexec/git-core/ of your git installation

and configure git to use that wrapper with:

git config [--global] diff.external git-external-diff

--global makes the configuration globalfor your user - otherwise it is

just configuredfor the current repository.

For everycommand which displays diffsin some way you can use the

parameter"--[no-]-ext-diff" toenable respectively disable using the

external diff command.

For the git diffcommand --ext-diff is enabled by default -for any

othercommand like git log -p or git format-patch it is not!

This method should work on all platforms supported by git.

If youdo not want to configure the external wrapper permanently or you

want to overwrite it you can also invoke git like:

export GIT_EXTERNAL_DIFF=git-external-diff

git diff --[no-]ext-diff

Alternatively, configure a gitaliasin~/.gitconfig or .git/config:

[alias]

cdiff =!GIT_EXTERNAL_DIFF=git-context-diff git diff

=cut

old_hash="$3"

new_hash=$(git hash-object"$5")