#!/usr/bin/env bash
# Every check the commit hooks make, plus the test suite, in one command.
#
# A commit made with `--no-verify` is checked by nobody, and so is a branch
# whose author never ran `prek install`. This script is what a person or a
# runner invokes to check a branch anyway.
#
# It does not restate the checks. prek.toml is the list, and this runs prek
# over it; a second list here would be a second source of truth and would
# disagree with the hooks within a month. What this adds to the hooks is the
# two things they cannot do:
#
#   1. The commit-msg stage over a range. The hook sees one message as it is
#      written; here every commit on the branch is checked, including the ones
#      that went in with the hook turned off.
#   2. The whole test suite. The hooks run the lexicon tests only, because a
#      full `cargo test` on every commit is a wait nobody would accept. A
#      change that breaks a test in another crate passes every hook.
#
# Usage: scripts/ci.sh [<base>]
#
#   <base>  The ref the branch is measured against for the commit-msg stage.
#           Defaults to $CI_BASE, then to origin/main.
set -euo pipefail

cd "$(dirname "$0")/.."

base="${1:-${CI_BASE:-origin/main}}"
status=0

step() {
  printf '\n=== %s ===\n' "$1" >&2
}

step "prek: the pre-commit hooks, over every file"
# --all-files rather than a diff: a runner has no staged set, and a hook whose
# `files` pattern never matched the branch's diff is exactly the one that has
# quietly stopped working.
prek run --all-files || status=1

step "prek: the commit-msg hook, over $base..HEAD"
if ! git rev-parse --verify --quiet "$base" >/dev/null; then
  echo "$base does not resolve here; skipping the commit-msg stage" >&2
else
  message="$(mktemp)"
  trap 'rm -f "$message"' EXIT
  commits="$(git rev-list "$base..HEAD")"
  if [ -z "$commits" ]; then
    echo "no commits on top of $base" >&2
  fi
  for commit in $commits; do
    git log -1 --format=%B "$commit" >"$message"
    echo "--- $(git log -1 --format='%h %s' "$commit")" >&2
    prek run --stage commit-msg --commit-msg-filename "$message" || status=1
  done
fi

step "cargo test: the whole workspace"
cargo test --workspace --all-features || status=1

if [ "$status" -eq 0 ]; then
  printf '\nall checks passed\n' >&2
else
  printf '\nsomething failed; see above\n' >&2
fi
exit "$status"