html-to-pdf.sh

#!/bin/bash
# html-to-pdf.sh wraps Chrome's headless PDF printing, mostly to enable WSL to use Chrome on
# Windows. I'm sorry.

WINDOWS_USER=${WINUSER:-Luke}
WSL_DRIVE=${WSL_DRIVE:-c}
WINDOWS_DRIVE=${WINDOWS_DRIVE:-C}
WSL_WORKSPACE=${WSL_WORKSPACE:-/mnt/${WSL_DRIVE}/Users/${WINDOWS_USER}/}
WINDOWS_WORKSPACE=${WINDOWS_WORKSPACE:-${WINDOWS_DRIVE}:\\Users\\${WINDOWS_USER}}
WINDOWS_CHROMEBIN=${WINDOWS_CHROMEBIN:-/mnt/${WSL_DRIVE}/Program Files (x86)/Google/Chrome/Application/chrome.exe}
CHROMEBIN=${CHROMEBIN:-chrome}

if [ "$#" -ne 2 ]; then
    echo 1>&2 "usage: $0 <input.html> <output.pdf>"
    exit 1
fi

infile=$1; shift
outfile=$1; shift

if uname -a | grep Microsoft; then
    echo 1>&2 "Doing bad things to support WSL"
    wslin="${WSL_WORKSPACE}/input.tmp.html"
    winin="${WINDOWS_WORKSPACE}\\input.tmp.html"
    wslout="${WSL_WORKSPACE}/output.tmp.pdf"
    winout="${WINDOWS_WORKSPACE}\\output.tmp.pdf"

    cp "$infile" "$wslin" &&
    $(WINDOWS_CHROMEBIN) --headless --disable-gpu --print-to-pdf="$winout" "$winin" &&
    rm "$wslin" &&
    mv "$wslout" "$outfile" || {
        rm -f "$wslin" "$wslout"
        cat 1>&2 <<-EOF
		Failed to make a pdf. You may need to install Chrome, or provide overrides for
		the variables at the top of $0
		
		Here is what was attempted:
		  cp \"$infile\" \"$wslin\"
		  $(WINDOWS_CHROMEBIN) --headless --disable-gpu --print-to-pdf=\"$winout\" \"$winin\"
		  rm \"$wslin\"
		  mv \"$wslout\" \"$outfile\"
		
		EOF
        exit 1
    }

    exit 0
fi

# easymode
${CHROMEBIN} --headless --disble-gpu --print-to-pdf="$outfile" "$infile"