Railway•5mo ago

getting libcairo not found

i tried setting both of these... but no dice: NIXPACKS_APT_PKGS=libcairo2,libcairo2-dev NIXPACKS_PKGS= cairo i still get this in my logs: when i run sudo apt install libcairo2 and libcairo2-dev on jammy... everything works in my build should i just stick that in the run command? seems hacky

import cairosvg
File "/opt/venv/lib/python3.8/site-packages/cairosvg/__init__.py", line 26, in <module>
from . import surface  # noqa isort:skip
File "/opt/venv/lib/python3.8/site-packages/cairosvg/surface.py", line 9, in <module>
import cairocffi as cairo
File "/opt/venv/lib/python3.8/site-packages/cairocffi/__init__.py", line 47, in <module>
cairo = dlopen(
File "/opt/venv/lib/python3.8/site-packages/cairocffi/__init__.py", line 44, in dlopen
raise OSError(error_message)  # pragma: no cover
OSError: no library called "cairo-2" was found
no library called "cairo" was found
no library called "libcairo-2" was found
cannot load library 'libcairo.so.2': libcairo.so.2: cannot open shared object file: No such file or directory.  Additionally, ctypes.util.find_library() did not manage to locate a library called 'libcairo.so.2'
cannot load library 'libcairo.2.dylib': libcairo.2.dylib: cannot open shared object file: No such file or directory.  Additionally, ctypes.util.find_library() did not manage to locate a library called 'libcairo.2.dylib'
cannot load library 'libcairo-2.dll': libcairo-2.dll: cannot open shared object file: No such file or directory.

import cairosvg
File "/opt/venv/lib/python3.8/site-packages/cairosvg/__init__.py", line 26, in <module>
from . import surface  # noqa isort:skip
File "/opt/venv/lib/python3.8/site-packages/cairosvg/surface.py", line 9, in <module>
import cairocffi as cairo
File "/opt/venv/lib/python3.8/site-packages/cairocffi/__init__.py", line 47, in <module>
cairo = dlopen(
File "/opt/venv/lib/python3.8/site-packages/cairocffi/__init__.py", line 44, in dlopen
raise OSError(error_message)  # pragma: no cover
OSError: no library called "cairo-2" was found
no library called "cairo" was found
no library called "libcairo-2" was found
cannot load library 'libcairo.so.2': libcairo.so.2: cannot open shared object file: No such file or directory.  Additionally, ctypes.util.find_library() did not manage to locate a library called 'libcairo.so.2'
cannot load library 'libcairo.2.dylib': libcairo.2.dylib: cannot open shared object file: No such file or directory.  Additionally, ctypes.util.find_library() did not manage to locate a library called 'libcairo.2.dylib'
cannot load library 'libcairo-2.dll': libcairo-2.dll: cannot open shared object file: No such file or directory.

11 Replies

Percy•5mo ago

Project ID: N/A

Brody•5mo ago

it would be best for you to build your app with a dockerfile

simulxxx•5mo ago

looks like this is a known issue: https://www.reddit.com/r/django/comments/184b0yk/django_project_deploying_in_railway/

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simulxxx•5mo ago

didn't even know nix supported dockerfiles how do i convince it to use a dockerfile?

Brody•5mo ago

nixpacks and dockerfiles are not mutually exclusive, if you are using a dockerfile nixpacks has nothing to do with the build anymore you simply place a Dockerfile in your repo

simulxxx•5mo ago

cool the thing is... it really looks like it's doing the right thing: #9 17.60 Unpacking libcairo2:amd64 (1.16.0-5ubuntu2) ... #9 17.63 Selecting previously unselected package libcairo-gobject2:amd64. i suspect it's a path thing.

Brody•5mo ago

oh I know, it is doing the right thing but for some unknown reason during runtime it's like none of that stuff was ever installed better to just use a Dockerfile for this kind of thing so you don't have to deal with the nixpacks stuff

simulxxx•5mo ago

if i use a dockerfile... do i still get the environment variables exposed nicely with the control panel?

Brody•5mo ago

yes of course

simulxxx•5mo ago

everything works... and the builds are faster because i can carefully control the layers. thanks a lot.

Brody•5mo ago

no problem! a Dockerfile is always going to be the go to for people who want absolute control over their build

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getting libcairo not found