lessfilter-pygmentize/templates/template.lessfilter.sh

#!/bin/bash
# uses Pygments v{{ pygments_version }} for syntax highlighting on applicable file types
for path in "$@"; do
    # match by known filenames
    filename=$(basename "$path")
    case "$filename" in
        {{ misc_shell_filenames }})
            # shell lexer
            pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" -l sh "$path"
            ;;
        {{ recognized_filenames }})
            # filename recognized
            pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" "$path"
            ;;
        *)
            # attempt to parse the lexer from the shebang if it exists
            # ensure that grep and awk are installed
            for prog in grep awk; do
                if ! command -v "$prog" &>/dev/null; then
                    echo "\`$prog\` not found; unable to parse shebang" >&2
                    # fall-back to plain text
                    exit 1
                fi
            done
            lexer=$(head -n 1 "$path" | grep '^#\!' | awk -F" " \
'{ if (/env/) { print $2 } else { sub( /.*\//, ""); print $1;} }')
            case "$lexer" in
                node|nodejs)
                    # use `js` lexer for nodejs
                    pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" \
                        -l js "$path"
                    ;;
                "")
                    # fall-back to plain text
                    exit 1
                    ;;
                *)
                    # use lexer alias parsed from the shebang
                    pygmentize -f 256 -O style="$PYGMENTIZE_STYLE" \
                        -l "$lexer" "$path"
                    ;;
            esac
            ;;
    esac
done
exit 0