Performing latexdiff on an overleaf repository between two tags

overleaf_diff.sh

#Execution: ./overleaf_diff [overleaf git hash] [main tex file name] [tag 1] [tag 2]

get_overleaf () {
  if [ -d "$1" ]; then
    cd "$1"
    git pull
    cd ..
  else
    git clone "https://git.overleaf.com/$1"
  fi

  if [ -d "$1_new" ]; then
    cd "$1_new"
    git pull
    cd ..
  else
    cp -R "$1" "$1_new"
  fi

  cd $1
  ver1=$(git log --oneline --all | grep $2)
  ver2=$(git log --oneline --all | grep $3)

  echo "Retrieved versions"
  echo "$ver1"
  echo "$ver2"

  ver1=$(echo "$ver1" | cut -c1-6)
  ver2=$(echo "$ver2" | cut -c1-6)

  echo "Checking out hashes"
  echo "$ver1"
  echo "$ver2"

  git checkout "$ver1"

  cd ..

  cd "$1_new"
  git checkout "$ver2"
  cd ..

}

do_diff () {
  latexdiff "$1/$2" "$1_new/$2" > "./$1_new/revision.tex"

  cd "$1_new"

  pdflatex "revision.tex"
  bibtex "revision.aux"
  pdflatex "revision.tex"
  pdflatex "revision.tex"
}


get_overleaf "$1" "$3" "$4"
do_diff "$1" "$2"
echo "Generated latex diff in: ./$1_new/revision.pdf"