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47 lines
1.2 KiB
47 lines
1.2 KiB
#!/bin/bash
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# Guard clause check if required binaries are installed
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which wget > /dev/null || { echo "Error: wget not installed." ; exit 1 ; }
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which egrep > /dev/null || { echo "Error: egrep not installed." ; exit 1 ; }
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# Recursively traverse directories in repo scraping markdown file for URLs
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# containing pdfs. Downloads pdfs into respective directories.
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download_for_directory() {
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cd $1 || { echo "Error: directory not found." ; exit 1 ; }
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for f in *; do
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if [[ -d ${f} ]]; then
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download_for_directory "./${f}" &
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fi
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done
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# Scrape URLs from markdown files
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urls=$(ls | cat *.md 2> /dev/null | egrep -o 'https?://[^ ]+' | grep '\.pdf' | tr -d ')')
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for url in "$urls"; do
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# Ignore empty URLs
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if [[ ! -z ${url} ]]; then
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wget ${url} --no-clobber --quiet --timeout=5 --tries=2
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fi
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done
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cd ..
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echo "$1 done."
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}
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# If no directories are supplied, iterate over the entire repo.
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if [[ "$#" -eq 0 ]]; then
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REPO_ROOT_DIR="$(dirname $0)/.."
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download_for_directory ${REPO_ROOT_DIR}
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else
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# Iterate over the specified directories
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for dir in "$@"
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do
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download_for_directory ${dir}
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done
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fi
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# Wait for child processes to terminate
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wait
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