#!/bin/bash -ex

# Documentation can be submitted in markdown and then converted to
# docbook so it can be built with the maven plugin. This is used by
# Jenkins when invoking certain docs jobs and the resulting output is
# made available to maven.

# In case we start doing something more sophisticated with other refs
# later (such as tags).
BRANCH=$ZUUL_REFNAME
shopt -s extglob

# This function figures out the location of the original script (as
# opposed to any chain of symlinks pointing to it). Source:
# http://muffinresearch.co.uk/archives/2008/10/10/bash-resolving-symlinks-to-shellscripts/
function resolve_symlink {
    SCRIPT=$1 NEWSCRIPT=''
    until [ "$SCRIPT" = "$NEWSCRIPT" ]; do
        if [ "${SCRIPT:0:1}" = '.' ]; then
            SCRIPT=$PWD/$SCRIPT;
        fi
        cd $(dirname $SCRIPT)
        if [ ! "${SCRIPT:0:1}" = '.' ]; then
            SCRIPT=$(basename $SCRIPT);
        fi
        SCRIPT=${NEWSCRIPT:=$SCRIPT}
        NEWSCRIPT=$(ls -l $SCRIPT | awk '{ print $NF }')
    done
    if [ ! "${SCRIPT:0:1}" = '/' ]; then
        SCRIPT=$PWD/$SCRIPT;
    fi
    echo $(dirname $SCRIPT)
}
DIR=$(resolve_symlink $0)

# Find location of db4-upgrade-xsl:
if [ -e /usr/share/xml/docbook/stylesheet/docbook5/db4-upgrade.xsl ] ; then
    DB_UPGRADE=/usr/share/xml/docbook/stylesheet/docbook5/db4-upgrade.xsl
elif [ -e  /usr/share/xml/docbook/stylesheet/upgrade/db4-upgrade.xsl ] ; then
    DB_UPGRADE=/usr/share/xml/docbook/stylesheet/upgrade/db4-upgrade.xsl
else
    echo "db4-upgrade.xsl not found"
    exit 1
fi

# Need to get the file name to insert here so it can be reused for
# multiple projects Filenames for the known repos that could do this
# are openstackapi-programming.mdown and images-api-v2.0.md and
# openstackapi-programming and images-api-v2.0 are the names for the
# ID and xml filename.

FILENAME=$1
FILEPATH=`find ./ -regextype posix-extended -regex ".*${FILENAME}\.(md|markdown|mdown)"`
DIRPATH=`dirname $FILEPATH`
SOURCES=`ls $DIRPATH/*.md`

# Check for requirements
type -P pandoc > /dev/null 2>&1 || { echo >&2 "pandoc not installed.  Aborting."; exit 1; }
type -P xsltproc > /dev/null 2>&1 || { echo >&2 "xsltproc not installed.  Aborting."; exit 1; }
type -P xmllint > /dev/null 2>&1 || { echo >&2 "xmllint not installed.  Aborting."; exit 1; }

TITLE=`head -n1 $DIRPATH/$FILENAME.md|sed -e 's/^#* *//'`
pandoc -V xmlid=$FILENAME --template=$DIR/pandoc-template.docbook -f markdown -t docbook -s ${SOURCES} |\
xsltproc -o - ${DB_UPGRADE} - |\
xmllint  --format -  |\
sed -e "s|<title>NO TITLE</title>|<title>$TITLE</title>|" > ${DIRPATH}/$FILENAME.xml

pwd