#!/bin/bash -l
# Copyright (C) 2016 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.

set -eE -o pipefail
trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" returned $?"' ERR

#set -x
# arg = git commit to check out

update=false
recompile=true
show_pkgs=false

while [[ $1 == -* ]]; do
    case $1 in
        --no-r) recompile=false; shift ;;
        -u) update=true; shift ;;
        -p) show_pkgs=true; shift ;;
        --) break ;;
    esac
done

e() { echo "$*"; "$@"; }

# Og = optmize, but keep gdb working
export CFLAGS="-Og -g3"

pkgs=(gawk attr autoconf-archive)
if $show_pkgs; then
    echo ${pkgs[*]}
    for x in emacs25 maildir-utils; do
      # todo, this gives fake provided packages like mailx, and then
      # fai ignores them.
      # https://askubuntu.com/questions/21379/how-do-i-find-the-build-dependencies-of-a-package
      apt-rdepends --build-depends --follow=DEPENDS $x|sed -rn 's/^\s*Build-Depends: (\S+).*/\1/p'
    done
    exit 0
fi


# gawk and attr were no longer automatically installed in stretch,
# looking back, i assume i got some error.
# autoconf-archive due to come error
pi ${pkgs[@]}


case $(distro-name) in
    fedora )
        logq s yum-builddep -y emacs
        logq pi texlive-dvipng
        ;;&
    debian|ubuntu|trisquel)
	# todo: unknown for other distros, this will fail
        logq p -y build-dep maildir-utils
        # oddly, on ubuntu 14.04 this installs postfix, but I dun care
        # ubuntu 14.04 gave this error message
        # Unable to satisfy the build-depends: Build-Depends: libpng-dev
        # this is satisfied by dvipng. the build-dep is just wrong
        # minor bug I'm not going to bother reporting.
        #
        # note, useful command to see build dep packagages:
        # apt-rdepends --build-depends --follow=DEPENDS emacs25
        logq p -y build-dep emacs25
        ;;&
esac



#building emacs, INSTALL.BZR

#git repo
dir=/a/opt/emacs-`distro-name`
dir+=`debian-archive` ||: # we may not be on debian

if [[ ! -e $dir ]]; then
    e cp -ar /a/opt/emacs $dir
    recompile=true
fi
e cd $dir

if $recompile; then
    # todo, consider when this should be uncommented
    #logq s make uninstall
    find ~/.emacs.d/ -name '*.elc' -delete

    # git version
    if [[ $1 ]]; then
        e i clean -xxxfd
    elif $update; then
        e i fetch
        e i clean -xxxffd
        e i reset --hard origin/master
        e i clean -xxxffd
    fi

    # autogen is usually only for the first build, assume it works
    logq ./autogen.sh all
    # I tried changing O2 to O3, don't know if it made it faster or slower so I went back to 02.
    # Also, link-time-optimization based on ./INSTALL

    # for debugging, use -Og, or -O0 to make debug really correspond to sources
    # dunno why I have had -std=gnu99 in the past
    #CFLAGS='-std=gnu99 -g3 -Og'
    export CFLAGS='-g3 -Og'
    #CFLAGS='-std=gnu99 -g3 -O2' logq ./configure --enable-link-time-optimization
    # on ubuntu 12.04, the above fails, says my c compiler won't work, so intead, just use defaults
    logq ./configure
    logq make -j `nproc` bootstrap
fi

# temporarily for testing multiple versions
logq make -j `nproc`
logq sudo make install

# make emacs always work for root
s lnf /usr/local/bin/emacs /usr/bin


#git clone https://github.com/djcb/mu
# from its HACKING file
cd /a/opt/mu
./autogen.sh
make
s make install
# note uninstall is implemented

if $recompile; then
    # note, not totally sure its right to put this within recompile, but its taking up most of the time, so going for it.
    logq emacs --batch -l ~/.emacs.d/init.el -l ~/.emacs.d/compile-init-dir.el
fi

# as of 01-2017, built-in org mode has a bug that
# org-edit-src-exit does not get bound, so using latest
/a/bin/buildscripts/org-mode

if $update; then
    logq pi bzr
    cd ~/.emacs.d/src/mediawiki-el
    bzr pull
fi


# not keeping up with the latest gnus development.
# # instructions from the README
# # the byte-recompile-directory seems to compile gnus,
# # but gnus complains that it should be compiled when it starts
# cd ~/.emacs.d/src/gnus
# if [[ $1 == *u* ]]; then
#     i pull
# fi
# logq ./configure
# logq make