#!/bin/sh
# SPDX-License-Identifier: MIT
set -eu
export TZ=UTC LC_ALL=C
export GIT_CONFIG_NOSYSTEM=1 GIT_CONFIG_GLOBAL=/dev/null
export GIT_AUTHOR_NAME='Example Author'
export GIT_AUTHOR_EMAIL='author@example.invalid'
export GIT_COMMITTER_NAME='Example Author'
export GIT_COMMITTER_EMAIL='author@example.invalid'
export GIT_AUTHOR_DATE='2026-10-25T12:00:00Z'
export GIT_COMMITTER_DATE='2026-10-25T12:00:00Z'
test "$(git --version)" = 'git version 2.56.0'
mkdir diff-example
cd diff-example
git -c init.templateDir= init -q -b main
printf 'base\n' > note.txt
git add note.txt
git commit -qm 'Base'
printf 'staged draft\n' > note.txt
git add note.txt
printf 'working draft\n' > note.txt
printf '%s\n' '--- staged difference ---'
git diff --cached -- note.txt
printf '%s\n' '--- working difference ---'
git diff -- note.txt
test "$(git show HEAD:note.txt)" = base
test "$(git show :note.txt)" = 'staged draft'
test "$(cat note.txt)" = 'working draft'
printf '%s\n' '--- staged version committed ---'
git commit -qm 'Commit staged draft'
test "$(git show HEAD:note.txt)" = 'staged draft'
test -z "$(git diff --cached -- note.txt)"
test -n "$(git diff -- note.txt)"
printf 'commit: staged draft committed; working draft remains\n'