fix_markdown_urls - `# Fixg URLs in markdown to be surrounded by <...>`

fix_markdown_urls

#!/bin/bash

# Fixg URLs in markdown to be surrounded by <...>
# https://gist.github.com/gwpl/8006aad209b84b0f618b45490948a044

function usage() {
    echo "Usage: $0 [-h|--help] [-i|--in-place] [file]"
    echo "  -h, --help       Show this help message and exit"
    echo "  -i, --in-place   Edit files in place"
    echo "  file             File to process (use '-' for standard input)"
}

function fix_markdown_urls() {
# Let's keep previouss perl verision in comment, just in case user needs to switch from python to perl oneliners:
# $ perl -pe 's/(?<!<)(https?:\/\/[^\s()<>\[\]]+)(?!>)/<$1>/g'

python -c "import re, sys; sys.stdout.write(re.sub(r'(?<!<)(https?://[^\s()<>[\]]+)(?!>)', r'<\\1>', sys.stdin.read()))"
}

IN_PLACE=false
FILE="-"

while [[ $# -gt 0 ]]; do
    case $1 in
        -h|--help)
            usage
            exit 0
            ;;
        -i|--in-place)
            IN_PLACE=true
            shift
            ;;
        -*)
            echo "Unknown option: $1"
            usage
            exit 1
            ;;
        *)
            FILE="$1"
            shift
            ;;
    esac
done

if $IN_PLACE; then
    if [[ "$FILE" == "-" ]]; then
        echo "Cannot use in-place editing with standard input"
        exit 1
    fi

    TMPFILE=$(mktemp)
    trap 'rm -f "$TMPFILE"' EXIT

    fix_markdown_urls < "$FILE" > "$TMPFILE"
    cat "$TMPFILE" > "$FILE"
else
    if [[ "$FILE" == "-" ]]; then
        fix_markdown_urls
    else
        fix_markdown_urls < "$FILE"
    fi
fi