#!/bin/sh
# Run the STE linter test suite in a batch Emacs.
#
# Required dependency: emacs, with Org mode. Org mode ships with Emacs.
# The suite runs the ERT tests, then runs the batch command on two
# temporary files to check its exit status.
#
# Exit status: 0 when every test passes, 1 otherwise.

set -eu

dir=$(CDPATH= cd -- "$(dirname -- "$0")" && pwd)

if ! command -v emacs >/dev/null 2>&1; then
    echo "Error: emacs is not on PATH. Install Emacs, then run this script again." >&2
    exit 1
fi

for file in ste-lint.el ste-lint-tests.el; do
    if [ ! -r "$dir/$file" ]; then
        echo "Error: cannot read $dir/$file. The skill directory is incomplete." >&2
        exit 1
    fi
done

if ! emacs --batch -Q -L "$dir" \
    -l "$dir/ste-lint-tests.el" \
    -f ert-run-tests-batch-and-exit; then
    echo "Error: STE linter tests failed. Read the ERT output above for the failing test." >&2
    exit 1
fi

tmp=$(mktemp -d "${TMPDIR:-/tmp}/ste-lint.XXXXXXXX")
trap 'rm -f "$tmp/clean.org" "$tmp/dirty.org"; rmdir "$tmp"' EXIT
printf 'Run the script.\n' > "$tmp/clean.org"
printf 'We cannot stop; we must go.\n' > "$tmp/dirty.org"

lint() {
    emacs --batch -Q -l "$dir/ste-lint.el" -f ste-lint-batch "$1" 2>/dev/null
}

if ! lint "$tmp/clean.org"; then
    echo "Error: the batch command failed on a clean file." >&2
    exit 1
fi
if lint "$tmp/dirty.org"; then
    echo "Error: the batch command passed a file with an ERROR finding." >&2
    exit 1
fi

echo "STE linter tests passed."