#!/bin/bash
#
# SPDX-License-Identifier: GPL-2.0-only
#
# Called with $1 as the build directory
#             $2 as the path to yocto-docs
#             $3 as the path to bitbake
#
# Environment variables:
#   - docs_buildtools as the path to buildtools script for the docs.
#                     Can be found here: https://autobuilder.yocto.io/pub/buildtools/
#   - docbookarchive as the path to old (pre 3.1.5 and Sphinx migration) docs tarball
#                     Can be found here: https://downloads.yoctoproject.org/mirror/docbook-mirror/docbook-archives-20201105.tar.xz
#   - PUBLISH (0/1) for whether the files should be rsync'ed to docs.yoctoproject.org

set -e
set -u
set -o pipefail
set -x

builddir=$(realpath "$1")
ypdocs=$(realpath "$2/documentation/")
bbdocs=$(realpath "$3/doc/")
docs_buildtools=${docs_buildtools:-/srv/autobuilder/autobuilder.yocto.io/pub/buildtools/x86_64-buildtools-docs-nativesdk-standalone-4.1.2.sh}
outputdir=$builddir/output
scriptdir="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
PUBLISH=${PUBLISH:-1}


cd $builddir
mkdir buildtools
$docs_buildtools -y -d $builddir/buildtools
. $builddir/buildtools/environment-setup*

# Getting the old docbook built docs from an archive. Not rebuilding them.
#wget https://downloads.yoctoproject.org/mirror/docbook-mirror/docbook-archives-20201105.tar.xz
docbookarchive=${docbookarchive:-/srv/autobuilder/autobuilder.yocto.io/pub/docbook-mirror/docbook-archives-20201105.tar.xz}
mkdir $outputdir
cd $outputdir
echo Extracing old content from archive
tar --exclude=eclipse -xJf $docbookarchive

$scriptdir/docs_add_banner.py

cd $bbdocs
mkdir $outputdir/bitbake

# A decision was made to keep updating all the Sphinx generated docs for the moment,
# even the ones corresponding to no longer supported releases
# https://lists.yoctoproject.org/g/docs/message/2193
# We copy the releases.rst file from master so that all versions of the docs
# see the latest releases.
first_sphinx_commit=84ccba0f4aff91528f764523fe1205a354c889ed

latest_branch=$(git branch --remote --contains "$first_sphinx_commit" --format '%(refname:lstrip=3)' --sort='-version:refname' | grep --max-count=1 "[0-9]*\.[0-9]*")

for branch in 1.46 $(git branch --remote --contains "$first_sphinx_commit" --format '%(refname:lstrip=3)'); do
    if [ "$branch" = "HEAD" ]; then
        continue
    fi

    echo Building bitbake $branch branch
    git checkout $branch
    git reset --hard
    git clean -ffdx
    git checkout origin/master releases.rst
    make clean
    SPHINXOPTS="-j auto" make publish

    if [ "$branch" = "master-next" ]; then
        branch="next"
	mkdir $outputdir/bitbake/$branch
    elif [ "$branch" = "master" ]; then
        branch="dev"
        mkdir $outputdir/bitbake/$branch
    elif [ "$branch" = "$latest_branch" ]; then
        branch=""
        mkdir $outputdir/bitbake/$latest_branch
        cp -r ./_build/final/* $outputdir/bitbake/$latest_branch
    else
	mkdir $outputdir/bitbake/$branch
    fi

    cp -r ./_build/final/* $outputdir/bitbake/$branch
    git reset --hard
    git clean -ffdx
done

if [ "$PUBLISH" -ne 0 ]; then
    # only sync bitbake folder for now. We need bitbake to be published first
    # since the bitbake intersphinx index will be downloaded to build yocto-docs
    cd $outputdir
    rsync -irlp --checksum --ignore-times --delete bitbake docs@docs.yoctoproject.org:docs/
fi

cd $ypdocs

# transition must build after master for the switchers.js file
# Again, keeping even the no longer supported releases (see above comment)
first_sphinx_commit=01dd5af7954e24552aca022917669b27bb0541ed
first_dunfell_sphinx_commit=c25fe058b88b893b0d146f3ed27320b47cdec236

git checkout origin/master set_versions.py
#latest_tag=$(git tag --contains "$first_sphinx_commit" --contains "$first_dunfell_sphinx_commit" --sort="version:refname" 'yocto-*' | tail -1 | sed 's/yocto-//')
latest_tag=$(./set_versions.py getlatest)
git reset --hard
git clean -ffdx

for branch in dunfell $(git branch --remote --contains "$first_sphinx_commit" --format '%(refname:lstrip=3)') $(git tag --contains "$first_sphinx_commit" --contains "$first_dunfell_sphinx_commit" 'yocto-*') transition; do
    if [ "$branch" = "HEAD" ]; then
        continue
    fi

    # Do not build <release>-next branches as they are development branches only
    # Do build master-next branch though!
    if echo "$branch" | grep -v "master-next" | grep -q -E "-next$"; then
        continue
    fi

    echo Building $branch
    git checkout $branch
    git reset --hard
    git clean -ffdx

    if [ -e "${scriptdir}/docs-build-patches/${branch}/" ]; then
        echo Adding patch for $branch
        git am "${scriptdir}/docs-build-patches/${branch}/"000*
    fi

    git checkout origin/master sphinx-static/switchers.js.in set_versions.py
    if [ -e poky.yaml ]; then
        cp poky.yaml poky.yaml.in
        case $branch in
            yocto-*)
                ./set_versions.py $(echo "$branch" | sed 's/yocto-//')
                ;;
            *)
                ./set_versions.py
                ;;
        esac
    fi

    make clean
    SPHINXOPTS="-j auto" make publish

    # Strip yocto- from tag names
    branch=$(echo "$branch" | sed 's/yocto-//')

    if [ "$branch" = "master-next" ]; then
        branch="next"
	mkdir -p $outputdir/$branch
    elif [ "$branch" = "master" ]; then
        branch="dev"
        mkdir -p $outputdir/$branch
    elif [ "$branch" = "$latest_tag" ]; then
        branch=""
        mkdir -p $outputdir/$latest_tag
        cp -r ./_build/final/* $outputdir/$latest_tag
        echo Linking to $latest_tag as current
        ln -s $latest_tag $outputdir/current
    elif [ "$branch" = "transition" ]; then
        branch=""
    else
	mkdir -p $outputdir/$branch
    fi

    cp -r ./_build/final/* $outputdir/$branch
    git reset --hard
    git clean -ffdx
done

# Update bitbake switchers.js with the copy from master ypdocs
cd $outputdir/bitbake
find . -name switchers.js -exec cp $outputdir/current/_static/switchers.js {} \;

if [ "$PUBLISH" -ne 0 ]; then
    cd $outputdir
    rsync -irlp --checksum --ignore-times --delete . docs@docs.yoctoproject.org:docs/
fi