#!/bin/sh

# Note: git describe doesn't work if no tag is available
git_tag="$(git describe --dirty --always)"
git_hash="$(git rev-parse --short HEAD 2> /dev/null || echo unknown)"
git_files_are_clean=1
# Check if there are any modified files.
git diff --no-ext-diff --quiet --exit-code 2> /dev/null || git_files_are_clean=0
# Check if there are any staged files.
git diff-index --cached --quiet HEAD -- 2> /dev/null || git_files_are_clean=0
if [ "${git_files_are_clean}" != "1" ]; then
    git_hash="${git_hash}-dirty"
fi

# Try to extract MicroPython version
if echo ${git_tag} | grep -q '^v[0-9]'; then
    ver=$(echo ${git_tag} | cut -b 2- | cut -d - -f 1)
    ver_major=$(echo ${ver} | cut -d . -f 1)
    ver_minor=$(echo ${ver} | cut -d . -f 2)
    ver_micro=$(echo ${ver} | cut -d . -f 3)
    if [ -z ${ver_micro} ]; then
        ver_micro="0"
    fi
else
    ver_major="0"
    ver_minor="0"
    ver_micro="1"
fi

cat <<EOF
// This file was generated by py/py-version.sh
#define MICROPY_GIT_TAG "${git_tag}"
#define MICROPY_GIT_HASH "${git_hash}"
#define MICROPY_BUILD_DATE "$(date '+%Y-%m-%d')"
#define MICROPY_VERSION_MAJOR (${ver_major})
#define MICROPY_VERSION_MINOR (${ver_minor})
#define MICROPY_VERSION_MICRO (${ver_micro})
#define MICROPY_VERSION_STRING "${ver_major}.${ver_minor}.${ver_micro}"
EOF