#!/bin/bash
# I, Ian Kelling, follow the GNU license recommendations at
# https://www.gnu.org/licenses/license-recommendations.en.html. They
# recommend that small programs, < 300 lines, be licensed under the
# Apache License 2.0. This file contains or is part of one or more small
# programs. If a small program grows beyond 300 lines, I plan to switch
# its license to GPL.

# Copyright 2024 Ian Kelling

# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at

#     http://www.apache.org/licenses/LICENSE-2.0

# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


if [[ -s ~/.bashrc ]];then . ~/.bashrc;fi


cd /a/opt/mu

recompile=false
dryrun=false

while [[ $1 == -* ]]; do
  case $1 in
    -n) dryrun=true ;;
    -r) recompile=true ;;
    --no-r) recompile=false ;;
    --) break ;;
    *) echo "$0: error: bad arg: $1" >&2; exit 1 ;;
  esac
  shift
done

bootstrap=false

#git repo
dir=/a/opt/mu-$(distro-name)$(distro-num)
last_build=$dir/iank-mu-build

if [[ -e $dir ]]; then
  m cd $dir
  rev=$(cat $last_build 2>/dev/null) ||:
  head=$(git rev-parse HEAD)
  if ! $recompile && ! $bootstrap && [[ $rev == "$head" ]]; then
    echo "already compiled"
    installed_info=$(file $(readlink -f $(type -P mu)))
    build_info=$(file $dir/build/mu/mu)
    if [[ $installed_info == "$build_info" ]]; then
      echo "already installed exiting"
      # this isn't perfect, because install could partially fail or the
      # command after it could
      exit 0
    fi
  fi
  echo rev=$rev head=$head
  if [[ $rev != "$head" ]]; then
    bootstrap=true
  fi
else
  head=$(git rev-parse HEAD)
  bootstrap=true
fi

if $dryrun; then
  e recompile=$recompile bootstrap=$bootstrap
  exit 0
fi

if $bootstrap; then
  m rsync --delete -ra /a/opt/mu/ $dir
  recompile=true
  cd $dir
fi


if [[ $(debian-codename) == flidas ]]; then
  # use the flidas branch, stuck behind because
  # needs newer crypt libraries that are too troublesome.
  cd /a/opt/muflidas
else
  # libgmime-3.0-dev is a newer version than build-dep installs for buster
  # note, currently, need newer meson than t10
  m pi libgmime-3.0-dev meson
fi
if $recompile; then
  m git clean -xfffd
  m ./autogen.sh && make -j`nproc`
  # note uninstall is implemented
  m sudo make install
else
  # Workaround for some indecipherable build error
  # that only happens after syncing the mu dir and not building from
  # scratch. It seems there is some state somewhere, like ~/.local
  # that doesn't get copied. Found the workaround by reading the Makefile,
  # then doing a more verbose build with:
  # ninja -C $PWD/build -v -d explain
  sudo touch -d @$(($(stat -c%Y build/build.ninja) - 100)) /usr/local/bin/emacs
  m sudo make install
fi
echo $head >$last_build