#!/bin/sh

cd "$(dirname "$0")"
cd ..
TOPDIR=`pwd`

install -d -m0755 build-doc

if command -v dpkg >/dev/null; then
    packages=`cat ${TOPDIR}/doc_deps.deb.txt`
    for package in $packages; do
    if [ "$(dpkg --status -- $package 2>&1 | sed -n 's/^Status: //p')" != "install ok installed" ]; then
        # add a space after old values
        missing="${missing:+$missing }$package"
    fi
    done
    if [ -n "$missing" ]; then
        echo "$0: missing required packages, please install them:" 1>&2
        echo "sudo apt-get install -o APT::Install-Recommends=true $missing" 1>&2
        exit 1
    fi
elif command -v yum >/dev/null; then
    for package in ant ditaa doxygen libxslt-devel libxml2-devel graphviz python3-devel python3-pip python3-virtualenv python3-Cython; do
	if ! rpm -q --whatprovides $package >/dev/null ; then
		missing="${missing:+$missing }$package"
	fi
    done
    if [ -n "$missing" ]; then
        echo "$0: missing required packages, please install them:" 1>&2
        echo "yum install $missing"
        exit 1
    fi
else
    for command in dot virtualenv doxygen ant ditaa cython; do
        if ! command -v "$command" > /dev/null; then
            # add a space after old values
            missing="${missing:+$missing }$command"
        fi
    done
    if [ -n "$missing" ]; then
        echo "$0: missing required command, please install them:" 1>&2
        echo "$missing" 1>&2
	exit 1
    fi
fi

# Don't enable -e until after running all the potentially-erroring checks
# for availability of commands
set -e

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

cd build-doc

[ -z "$vdir" ] && vdir="$TOPDIR/build-doc/virtualenv"

if [ ! -e $vdir ]; then
    virtualenv --python=python3 $vdir
fi
$vdir/bin/pip install --quiet -r $TOPDIR/admin/doc-requirements.txt

install -d -m0755 \
    $TOPDIR/build-doc/output/html \
    $TOPDIR/build-doc/output/man

# To avoid having to build librbd to build the Python bindings to build the docs,
# create a dummy librbd.so that allows the module to be imported by sphinx.
# the module are imported by the "automodule::" directive.
mkdir -p $vdir/lib
export LD_LIBRARY_PATH="$vdir/lib"
export PYTHONPATH=$TOPDIR/src/pybind

# FIXME(sileht): I dunno how to pass the include-dirs correctly with pip
# for build_ext step, it should be:
# --global-option=build_ext --global-option="--cython-include-dirs $TOPDIR/src/pybind/rados/"
# but that doesn't work, so copying the file in the rbd module directly, that's ok for docs
for bind in rados rbd cephfs rgw; do
    if [ ${bind} != rados ]; then
        cp -f $TOPDIR/src/pybind/rados/rados.pxd $TOPDIR/src/pybind/${bind}/
    fi
    ln -sf lib${bind}.so.1 $vdir/lib/lib${bind}.so
    gcc -shared -o $vdir/lib/lib${bind}.so.1 -xc /dev/null
    ld_flags="-Wl,-rpath,$vdir/lib"
    if [ $(uname) != Darwin ]; then
        ld_flags="${ld_flags},--no-as-needed"
    fi
    BUILD_DOC=1 \
        CFLAGS="-iquote$TOPDIR/src/include" \
        CPPFLAGS="-iquote$TOPDIR/src/include" \
        LDFLAGS="-L$vdir/lib ${ld_flags}" \
        $vdir/bin/pip install --upgrade $TOPDIR/src/pybind/${bind}
    # rgwfile_version(), librgw_create(), rgw_mount()
    # since py3.5, distutils adds postfix in between ${bind} and so
    lib_fn=$vdir/lib/python*/*-packages/${bind}.*.so
    if [ ! -e $lib_fn ]; then
       lib_fn=$vdir/lib/python*/*-packages/${bind}.so
    fi
    if [ ${bind} = "cephfs" ]; then
        func_prefix="ceph"
    else
        func_prefix="(lib)?${bind}"
    fi
    nm $lib_fn | grep -E "U (_)?${func_prefix}" | \
        awk '{ gsub(/^_/,"",$2); print "void "$2"(void) {}" }' | \
        gcc -shared -o $vdir/lib/lib${bind}.so.1 -xc -
    if [ ${bind} != rados ]; then
        rm -f $TOPDIR/src/pybind/${bind}/rados.pxd
    fi
done

if [ -z "$@" ]; then
    sphinx_targets="html man"
else
    sphinx_targets=$@
fi
for target in $sphinx_targets; do
    builder=$target
    case $target in
        html)
            builder=dirhtml
            extra_opt="-D graphviz_output_format=svg"
            ;;
        man)
            extra_opt="-t man"
            ;;
    esac
    # Build with -W so that warnings are treated as errors and this fails
    $vdir/bin/sphinx-build -W --keep-going -a -b $builder $extra_opt -d doctrees \
                           $TOPDIR/doc $TOPDIR/build-doc/output/$target


done

# build the releases.json. this reads in the yaml version and dumps
# out the json representation of the same file. the resulting releases.json
# should be served from the root of hosted site.
$vdir/bin/python << EOF > $TOPDIR/build-doc/output/html/releases.json
from __future__ import print_function
import datetime
import json
import yaml

def json_serialize(obj):
    if isinstance(obj, datetime.date):
        return obj.isoformat()

with open("$TOPDIR/doc/releases/releases.yml", 'r') as fp:
    releases = yaml.safe_load(fp)
    print(json.dumps(releases, indent=2, default=json_serialize))
EOF

#
# Build and install JavaDocs
#
JAVADIR=$TOPDIR/src/java

# Clean and build JavaDocs
rm -rf $JAVADIR/doc
ant -buildfile $JAVADIR/build.xml docs

# Create clean target directory
JAVA_OUTDIR=$TOPDIR/build-doc/output/html/api/libcephfs-java/javadoc
rm -rf $JAVA_OUTDIR
mkdir $JAVA_OUTDIR

# Copy JavaDocs to target directory
cp -a $JAVADIR/doc/* $JAVA_OUTDIR/

echo "SUCCESS"