#!/usr/bin/env bash
## Documentation publishing script for Travis CI integration
##
## Copyright (c) 2012-2014 Sylvain Benner
## Copyright (c) 2014-2017 Sylvain Benner & Contributors
##
## Author: Eugene Yaremenko
## URL: https://github.com/syl20bnr/spacemacs
##
## This file is not part of GNU Emacs.
##
## License: GPLv3

echo_headline () {
    printf '=%.0s' {1..70}
    printf "\n$1\n"
    printf '=%.0s' {1..70}
    echo
}

if  [ $TRAVIS_SECURE_ENV_VARS = true ]; then

    hub_version="2.2.9"
    hub_url="https://github.com/github/hub/releases/download/"
    hub_url+="v${hub_version}/hub-linux-amd64-${hub_version}.tgz"

    if  [ "$TRAVIS_BRANCH" = "master" ]; then
        PUBLISH="spacemacs.org"
    elif [ "$TRAVIS_BRANCH" = "develop" ]; then
        PUBLISH="develop.spacemacs.org"
    else
        echo "branch is \"${TRAVIS_BRANCH}\". Won't publish."
        exit 0
    fi

    rm -rf ~/.emacs.d
    mv "${TRAVIS_BUILD_DIR}" ~/.emacs.d
    ln -sf ~/.emacs.d "${TRAVIS_BUILD_DIR}"
    cd  ~/.emacs.d

    echo_headline "INSTALLING \"${EVM_EMACS}\":"
    curl -fsSkL https://gist.github.com/rejeep/ebcd57c3af83b049833b/raw \
        > /tmp/x.sh && source /tmp/x.sh
    evm install $EVM_EMACS --use --skip
    if [ $? -ne 0 ]; then
        echo "Installation failed"
        exit 2
    fi

    echo_headline "FORMATTING DOCUMENTATION:"
    emacs --batch -l ./core/tools/docfmt/run.el
    if [ $? -ne 0 ]; then
        echo "core/tools/docfmt failed"
        exit 2
    fi
    git diff --color HEAD > /tmp/spacefmt_result
    if [[ -s /tmp/spacefmt_result ]]; then
        echo_headline "PLEASE APPLY CHANGES BELOW:"
        cat /tmp/spacefmt_result
        exit 2
    fi
    echo "Done."

    echo_headline "TESTING DOCUMENTATION"
    emacs --batch -l ./core/tools/export/run.el export
    if [ $? -ne 0 ]; then
        echo "core/tools/export failed"
        exit 2
    fi
    rm -rf /tmp/spacemacs-export
    echo "Done."

    echo_headline "CHECKING FOR MISPLACED SPACES AND TABS"
    git diff --check --color > /tmp/space_test_result
    if [[ -s /tmp/space_test_result ]]; then
        echo_headline "PLEASE FIX ISSUES BELOW:"
        cat /tmp/space_test_result
        exit 2
    fi
    echo "Done."

    echo_headline "PUBLISHING ${PUBLISH}"

    echo_headline "INSTALLING DEPENDENCIES:"
    cp ~/.emacs.d/.travisci/.spacemacs ~/
    cd  ~/.emacs.d
    emacs -batch -l init.el

    echo_headline "EXPORTING DOCUMENTATION:"
    emacs -batch -l init.el -l core/core-documentation.el \
          -f spacemacs/publish-doc
    if [ $? -ne 0 ]; then
        echo "spacemacs/publish-doc failed"
        exit 2
    fi

    echo_headline "CONFIGURING GIT USER:"
    git config --global user.name "${BOT_NAME}"
    git config --global user.email "${BOT_EMAIL}"
    git config --global push.default simple
    git config --global hub.protocol https
    export GITHUB_TOKEN=$BOT_TK

    echo_headline "CLONING TARGET REPOSITORY:"
    target_URL="https://github.com/syl20bnr/${PUBLISH}.git"
    git clone "${target_URL}" -b gh-pages "/tmp/${PUBLISH}"
    if [ $? -ne 0 ]; then
        echo "Failed to clone \"${target_URL}\""
        exit 2
    fi
    echo "Done."
    rsync -avh ~/.emacs.d/export/ "/tmp/${PUBLISH}"
    git add --all
    git diff --cached --exit-code
    if [ $? -eq 0 ]; then
        echo "Nothing to commit - exiting."
        exit 0
    fi

    cd "/tmp/${PUBLISH}"
    echo_headline "PUSHING CHANGES TO ${BOT_NAME}/${PUBLISH}:"
    curl -L $hub_url | tar \
                           --strip-components=2 \
                           -xz \
                           --wildcards \
                           -C /tmp/ \
                           "*hub"
    /tmp/hub add --all
    /tmp/hub commit -m "doc update:$(date -u)"
    if [ $? -ne 0 ]; then
        echo "hub commit failed"
        exit 2
    fi
    /tmp/hub fork
    if [ $? -ne 0 ]; then
        echo "hub fork failed"
        exit 2
    fi
    mkdir -p ~/.ssh
    printf  "Host  github.com\n" > ~/.ssh/config
    printf  "  StrictHostKeyChecking no\n" >> ~/.ssh/config
    printf  "  UserKnownHostsFile=/dev/null\n" >> ~/.ssh/config
    fork_url="https://${BOT_NAME}:${BOT_TK}"
    fork_url+="@github.com/${BOT_NAME}/${PUBLISH}.git"
    git remote set-url "${BOT_NAME}" "${fork_url}"
    /tmp/hub push -f "${BOT_NAME}" gh-pages > /dev/null 2>&1
    #                      prevent token leak ^^^^^^^^^^^^^^
    # But it's actually not necessary since TravisCI masks secrets in logs
    if [ $? -ne 0 ]; then
        echo "hub push to \"${BOT_NAME}\" failed"
        exit 2
    fi
    echo_headline "OPENING PR TO syl20bnr/${PUBLISH}.git"
    echo "Documentation updates (autoexport)" > msg
    echo "beep beep boop... Beep?" >> msg
    /tmp/hub pull-request -F msg
    if [ $? -ne 0 ]; then
        echo "Seems like PR already exists (not a problem)"
    fi
    echo "DONE!"
    exit 0
else
    echo "TRAVIS_SECURE_ENV_VARS isn't true - aborting."
    exit 2
fi