Compare a translated notebook/md file with the English original in tensorflow/docs using nbdiff-web

transdiff.sh

#!/bin/bash
# This tool is to compare a translated notebook or markdown file to
# the original English document in tensorflow/docs.

# Check if the nbdiff is available
if ! [ -x "$(command -v nbdiff-web)" ]; then
  echo 'Error: nbdiff-web is not installed. `pip install nbdime` please' >&2
  exit 1
fi

# Check the number of arguments
if [ $# -ne 3 ]; then
  echo "Error: Invalid arguments"
  echo "Usage: transdiff <repository name> <branch name> <file to diff>"
  exit 1
fi

GITHUB_ORIGIN="https://github.com/tensorflow/docs"
GITHUB_REPOSITORY=${1}
GITHUB_REPOSITORY_URL="https://github.com/${GITHUB_REPOSITORY}"
BRANCH=${2}
FILE_TO_DIFF=${3}

TEMP_DIR="ghrepos"

# Remove temporary directory
rm -rf ${TEMP_DIR}
mkdir ${TEMP_DIR}

IFS='/'
read -ra ADDR <<< "$FILE_TO_DIFF"
IFS=' '

arraylength=${#ADDR[@]}
 
origin_url="$GITHUB_ORIGIN/raw/master"
for (( i=1; i<${arraylength}+1; i++ )); do
  if [[ i -eq 2 ]]; then
    origin_url+="/en"
  else
    origin_url+="/${ADDR[$i-1]}"
  fi
done

target_url="$GITHUB_REPOSITORY_URL/raw/$BRANCH/$FILE_TO_DIFF"

filename=$(basename "$target_url")
ext="${filename##*.}"
fname="${filename%.*}"

origin_file=en_$filename
target_file=${ADDR[1]}_$filename
echo $origin_file
echo $target_file

wget -q -O $TEMP_DIR/$origin_file $origin_url
wget -q -O $TEMP_DIR/$target_file $target_url

if [ $ext == "ipynb" ];
then
  nbdiff-web $TEMP_DIR/$origin_file $TEMP_DIR/$target_file
else
  diff $TEMP_DIR/$origin_file $TEMP_DIR/$target_file
fi