#!/bin/sh
# gen_version.sh -- write OpenPuck/git_version.h with build provenance for the WebUSB panel:
#   - semantic version (when OPK_BUILD_VERSION is set, or HEAD has a semver tag),
#   - git short hash,
#   - dirty flag.
# Run this BEFORE `arduino-cli compile` (it's a no-op to re-run). The generated header is git-ignored, so
# generating it never itself marks the tree dirty.
set -e
cd "$(dirname "$0")"

HASH=$(git rev-parse --short=8 HEAD 2>/dev/null || echo unknown)
VERSION="${OPK_BUILD_VERSION:-}"
if [ -z "$VERSION" ]; then
	VERSION="$(
		git tag --points-at HEAD 2>/dev/null \
			| grep -E '^[0-9]+\.[0-9]+\.[0-9]+$' \
			| sort -V \
			| tail -n1 || true
	)"
fi
# Dirty = any tracked change OR untracked file (porcelain is empty only on a clean tree). git_version.h is
# git-ignored so it doesn't count.
if [ -z "$(git status --porcelain 2>/dev/null)" ]; then DIRTY=0; else DIRTY=1; fi

cat > OpenPuck/git_version.h <<EOF
// AUTO-GENERATED by gen_version.sh -- do not edit, do not commit (git-ignored).
#pragma once
#define OPK_BUILD_VERSION "$VERSION"
#define OPK_GIT_HASH "$HASH"
#define OPK_GIT_DIRTY $DIRTY
EOF

echo "OpenPuck/git_version.h: version=${VERSION:-none} hash=$HASH dirty=$DIRTY"