#!/bin/bash
set -e

build="$PWD/website-build"
usage="Builds eventlet.net website static pages into ${build}.
Requires sphinx-build, git and Github account.

  --no-commit        Just build HTML, skip any git operations."

commit=1
while [ -n "$1" ]; do
    case $1 in
    --no-commit)
        commit=0
        ;;
    *)
        echo "$usage" >&2
        exit 1
        ;;
    esac
	shift
done

if ! which sphinx-build >/dev/null; then
	echo "sphinx-build not found. Possible solution: pip install sphinx" >&2
	echo "Links: http://sphinx-doc.org/" >&2
	exit 1
fi

if [ $commit -eq 1 ] && ! git status >/dev/null; then
	echo "git not found. git and Github account are required to update online documentation." >&2
	echo "Links: http://git-scm.com/ https://github.com/" >&2
	exit 1
fi

echo "1. clean"
rm -rf "$build"
mkdir -p "$build/doc"

echo "2. build static pages"
cp doc/real_index.html "$build/index.html"
cp NEWS doc/changelog.rst

# -b html -- builder, output mode
# -d dir  -- path to doctrees cache
# -n      -- nit-picky mode (kind of -Wall for gcc)
# -W      -- turns warnings into errors
# -q      -- quiet, emit only warnings and errors
sphinx-build -b html -d "$build/tmp" -n -q "doc" "$build/doc"
rm -rf "$build/tmp"
rm -f "$build/doc/.buildinfo"
rm -f "doc/changelog.rst"

if [ $commit -eq 1 ]; then
    echo "3. Updating git branch gh-pages"
    source_name=`git rev-parse --abbrev-ref HEAD`
    source_id=`git rev-parse --short HEAD`
    git branch --track gh-pages origin/gh-pages || true
    git checkout gh-pages
    git ls-files |grep -Ev '^.gitignore$' |xargs rm -f
    rm -rf "doc"

    mv "$build"/* ./
    touch ".nojekyll"
    echo "eventlet.net" >"CNAME"
    rmdir "$build"

    echo "4. Commit"
    git add -A
    git status

    read -p "Carefully read git status output above, press Enter to continue or Ctrl+C to abort"
    git commit --edit -m "Website built from $source_name $source_id"
fi