Error: libcups.so.2: cannot open shared object file: No such file or directory

[marisaroude]

Hi! I need help with this problem. I'm deploying in vercel but i have this error:

Error: libcups.so.2: cannot open shared object file: No such file or directory
at Module._extensions..node (node:internal/modules/cjs/loader:1340:18)
at Module.load (node:internal/modules/cjs/loader:1119:32)
at Module._load (node:internal/modules/cjs/loader:960:12)
at r..e._load (/var/task/___vc/__launcher/bridge-server-72TT5FOD.js:1:1574)
at Module.require (node:internal/modules/cjs/loader:1143:19)
at require (node:internal/modules/cjs/helpers:119:18)
at Object. (/var/task/node_modules/@damonsmith/node-printer/lib/printer-binding.js:4:17)
at Module._compile (node:internal/modules/cjs/loader:1256:14)
at Module._extensions..js (node:internal/modules/cjs/loader:1310:10)
at Module.load (node:internal/modules/cjs/loader:1119:32) {
code: 'ERR_DLOPEN_FAILED'
}
INIT_REPORT Init Duration: 1022.90 ms Phase: invoke Status: error Error Type: Runtime.ExitError
Error: Runtime exited with error: exit status 1
Runtime.ExitError

[mazinsw]

Hi, on linux based system it's required to install libcups2, try this command: sudo apt-get install libcups2-dev

[marisaroude]

Hi! thank you for your reply.
Yes, I have the package installed. I do not understand what I am missing.

[marisaroude]

Is it necessary to use electron? Because I am not implementing it

[mazinsw]

It is tested on electron, but it should work on node too, this problem seems a missing system lib path, check if this path get from this command whereis libcups.so.2 is listed here by this command cat /etc/ld.so.conf.d/*

[marisaroude]

I got this result, should I add the following line in one of the .conf files?

/usr/lib/x86_64-linux-gnu/libcups.so.2

[mazinsw]

It already contains the path, can be a problem on node_modules installation folder, did you remove nodes_modules and reinstalled?
if not solve check if this command ldd node_modules/@grandchef/node-printer/lib/binding/node_printer.node | grep libcups output like this: libcups.so.2 => /usr/lib/x86_64-linux-gnu/libcups.so.2 (0x00007efde22b4000)
if different try creating a alias: sudo ln -s /usr/lib/x86_64-linux-gnu/libcups.so.2 /lib/x86_64-linux-gnu/libcups.so.2

directory /lib/x86_64-linux-gnu/ must exists, if not, make with: sudo mkdir -p /lib/x86_64-linux-gnu/

[marisaroude]

I tried to remove node_modules and reinstall the dependencies, but it didn't work.

I understand that this command ldd node_modules/@grandchef/node-printer/lib/binding/node_printer.node | grep libcups returns fine.

What I find strange is that I get perfect execution and printing on the thermal printer when I play the GraphQL mutation that performs this action on localhost.

I think maybe I am having problems with the LD_LIBRARY_PATH environment variable, is it possible?

[marisaroude]

Replace @grandchef with @damonsmith as that was the one I installed.

[mazinsw]

Now its get more clear, the build was made at a different OS base than vercel are try to run, this explain why it is not finding the library, try to build at the same OS/Container than vercel

[marisaroude]

Like Docker?
Before implementing printing with the thermal printer, I had already deployed it and it worked perfectly.
Sorry for so many questions, it's the first time I implement a thermal printer and deploy in vercel.

[marisaroude]

I was able to perform different queries and other mutations, for example, add, update, get, and others.

[mazinsw]

Yes, docker has many base container like, alpine, ubuntu, debian, you must build with the same base container than vercel https://vercel.com/docs/deployments/build-image

I undersant that when not loaded the library the error does not occurr, this explain why some queries does not trigger the error

[marisaroude]

Perfect, I'll go that way.
Thank you very much!