#!/bin/sh
#
# Pre-commit hook that checks

# Recover the part of the branch name before the first / (or the full branch
# name if there's no /)
branch_prefix=$(git rev-parse --abbrev-ref HEAD | sed 's,/.*,,')

# Stash non-staged modifications to only run the checks on the staged changes
stash=$(mktemp --tmpdir git-stash.XXXXXXX)
git diff --full-index --binary > "$stash"
# Also save into an actual git stash in case something goes wrong. We can't only
# use the git stash because otherwise we may have conflicts when re-applying the
# changes post-commit
git stash -q --keep-index

ret=0

# The actual tests go here
cargo test --quiet || ret=$?
cargo clippy -- -D warnings || ret=$?
cargo fmt -- --check || ret=$?

# Restore stashed changes (if necessary)
if [ -s "$stash" ]
then
    git apply --whitespace=nowarn < "$stash" && git stash drop -q
    rm "$stash"
fi

if [ "$branch_prefix" = "dev" ]
then
    # Ignore errors
    exit 0
else
    exit $ret
fi