set -eu

scenario=$1

git init -q -b main repo

cd repo

git config user.name 'GitPython Tests'

git config user.email gitpython@example.com

mkdir dir

printf 'root\n' > README.md

printf 'root changes\n' > CHANGES

printf 'root file\n' > dir/file.txt

git add .

git commit -qm 'root commit'

root=$(git rev-parse HEAD)

git tag -a ann -m 'annotated tag'

printf 'release\n' > README.md

git add README.md

git commit -qm 'release candidate'

release=$(git rev-parse HEAD)

git tag v1.0

printf 'side\n' > side.txt

git add side.txt

tree=$(git write-tree)

side=$(printf 'side branch' | git commit-tree "$tree" -p "$root")

git branch side "$side"

merge=$(printf 'merge side' | git commit-tree "$tree" -p "$release" -p "$side")

git update-ref -m 'commit: merge side' HEAD "$merge"

git reflog write HEAD "$side" "$merge" 'checkout: moving from side to main'

git branch aaaaaaaa "$merge"

git tag @foo "$merge"

printf 'root %s\nrelease %s\nside %s\nmerge %s\n' "$root" "$release" "$side" "$merge" > ../commits

case "$scenario" in

rev_parse_reflog_selectors)

git remote add origin ../repo

git update-ref refs/remotes/origin/main "$merge"

git config branch.main.remote origin

git config branch.main.merge refs/heads/main

;;

describe-collision)

abbrev=$(git rev-parse --short=7 "$merge")

git tag "anything-9-g$abbrev" "$release"

;;

hex-prefix-collision)

blob=$(git rev-parse HEAD:README.md)

prefix=$(git rev-parse --short=7 "$blob")

git branch "$prefix-topic" "$release"

printf '%s\n' "$prefix" > ../hex-prefix

;;

rev_parse_preserves_path_metadata_with_colons)

blob=$(git rev-parse HEAD:dir/file.txt)

subtree=$(printf '100644 blob %s\tname:with:colons\n' "$blob" | git mktree)

tree=$(printf '040000 tree %s\tdir\n' "$subtree" | git mktree)

commit=$(printf 'message: with colon' | git commit-tree "$tree" -p "$merge")

git update-ref HEAD "$commit"

case "$(uname -s)" in MINGW*|MSYS*|CYGWIN*) ;; *) git read-tree HEAD ;; esac

;;

rev_parse_commit_message_literal_bang_and_option)

git commit -qm '!urgent --all' --allow-empty

;;

rev_parse_commit_message_escaped_braces)

git commit -qm 'literal{3}' --allow-empty

git commit -qm literalll --allow-empty

;;

backtracking)

git commit -qm "hello $(printf '%080d' 0 | tr 0 b)" --allow-empty

;;

needle)

git commit -qm needle --allow-empty

;;