#!/bin/sh
set -e
cd "$(dirname "$0")"
cd ..

install -d -m0755 build-doc

if command -v dpkg >/dev/null; then
    for package in python-dev python-pip python-virtualenv doxygen ditaa; do
	if [ "$(dpkg --status -- $package|sed -n 's/^Status: //p')" != "install ok installed" ]; then
            # add a space after old values
	    missing="${missing:+$missing }$package"
	fi
    done
    if [ -n "$missing" ]; then
	echo "$0: missing required packages, please install them:" 1>&2
	echo "sudo apt-get install $missing"
	exit 1
    fi
else
    for command in virtualenv doxygen ditaa; do
	if ! command -v "$command" >/dev/null; then
            # add a space after old values
	    missing="${missing:+$missing }$package"
	fi
    done
    if [ -n "$missing" ]; then
	echo "$0: missing required command, please install them:" 1>&2
	echo "$missing"
	exit 1
    fi
fi

if [ ! -e build-doc/doxygen/xml ]; then
    doxygen
fi

cat src/osd/PG.h src/osd/PG.cc | doc/scripts/gen_state_diagram.py > doc/dev/peering_graph.generated.dot

cd build-doc

[ -z "$vdir" ] && vdir="./virtualenv"

if [ ! -e $vdir ]; then
    virtualenv --system-site-packages $vdir
fi
$vdir/bin/pip install -r ../admin/doc-requirements.txt

sphinx_build="$vdir/bin/sphinx-build"
if [ ! -e $sphinx_build ]; then
    # If sphinx is not installed inside the virtualenv (that is, we
    # have a system-wide sphinx installed and it is new enough), use
    # that. As we need to use the python interpreter from inside the
    # virtualenv to make the sphinx extensions visible, we need need
    # to know the full path to the sphinx-build script.
    sphinx_build="$(command -v -p sphinx-build)"
fi

install -d -m0755 \
    output/html \
    output/man
PYTHONPATH="$(pwd)/../src/pybind" "$vdir/bin/python" "$sphinx_build" -a -b dirhtml -d doctrees ../doc output/html
"$vdir/bin/python" "$sphinx_build" -a -b man -d doctrees ../doc output/man