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{ hostPkgs, lib, ... }:
{
name = "cups-pdf";
nodes.machine =
{ pkgs, ... }:
{
imports = [ ./common/user-account.nix ];
environment.systemPackages = [ pkgs.poppler-utils ];
fonts.packages = [ pkgs.dejavu_fonts ]; # yields more OCR-able pdf
services.printing.cups-pdf.enable = true;
services.printing.cups-pdf.instances = {
opt = { };
noopt.installPrinter = false;
};
hardware.printers.ensurePrinters = [
{
name = "noopt";
model = "CUPS-PDF_noopt.ppd";
deviceUri = "cups-pdf:/noopt";
}
];
};
# we cannot check the files with pdftotext, due to
# https://github.com/alexivkin/CUPS-PDF-to-PDF/issues/7
# we need `imagemagickBig` as it has ghostscript support
testScript = ''
from subprocess import run
machine.wait_for_unit("multi-user.target")
for name in ("opt", "noopt"):
text = f"test text {name}".upper()
machine.wait_until_succeeds(f"lpstat -v {name}")
machine.succeed(f"su - alice -c 'echo -e \"\n {text}\" | lp -d {name}'")
# wait until the pdf files are completely produced and readable by alice
machine.wait_until_succeeds(f"su - alice -c 'pdfinfo /var/spool/cups-pdf-{name}/users/alice/*.pdf'")
machine.succeed(f"cp /var/spool/cups-pdf-{name}/users/alice/*.pdf /tmp/{name}.pdf")
machine.copy_from_machine(f"/tmp/{name}.pdf", "")
run(f"${lib.getExe hostPkgs.imagemagickBig} -density 300 $out/{name}.pdf $out/{name}.jpeg", shell=True, check=True)
assert text.encode() in run(f"${lib.getExe hostPkgs.tesseract} $out/{name}.jpeg stdout", shell=True, check=True, capture_output=True).stdout
'';
meta.maintainers = [ lib.maintainers.yarny ];
}
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