Backup R Markdown HTML reports

htmlbackup

#!/bin/bash
#
# Backup R Markdown authored HTML files to a "notebook" sub-directory and add
# a timestamp to the HTML file
#
# e.g.
# R_analysis.html -> notebook/R_analysis.2015-02-12.html
#
# If file is version controlled, then a short commit hash is also added.

HTML=$1
DIR=notebook

if [ ! -e "$HTML" ]
then
    >&2 echo "File doesn't exist!" 
    exit 1
fi

mkdir -vp $DIR

# Add short git hash if available
HASH=`git rev-parse --short HEAD`
if [ $? == 0 ]
then
    NEWHTML="$DIR/`basename $HTML .html`.`date +%F_%H%M -r $HTML`_$HASH.html"
else 
    NEWHTML="$DIR/`basename $HTML .html`.`date +%F_%H%M -r $HTML`.html"
fi


if [ -e "$NEWHTML" ]
then
    echo "Up to date"
else
    cp -aiv $HTML $NEWHTML
fi