Rename pdf's based on metadata (requires pdfinfo from the poppler package)

gistfile1.sh

# It uses the pdf meta data to rename the file to the title of the pdf
# on osx it requires poppler installed: brew install poppler

find . -type f -name "*.pdf" -exec sh -c 'mv "$0" "$(pdfinfo $0  | sed -n "/^Title/ s/Title:\(.*\)/\1.pdf/p" | sed "s/^[ \t]*//" | sed -e "s/[^A-Za-z0-9._-]/_/g")"' {} \;