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fix: allow modern PyGObject so conda-forge installs work (#1) #18

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Merged
AmitMY merged 1 commit into from
Oct 7, 2026
Merged

fix: allow modern PyGObject so conda-forge installs work (#1) #18

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2 changes: 1 addition & 1 deletion .github/actions/setup-pango-cairo/action.yaml
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Expand Up @@ -16,7 +16,7 @@ runs:
id: apt-pkgs
shell: bash
run: |
pkgs="libgirepository-1.0-1 libcairo2 gir1.2-pango-1.0 pkg-config libcairo2-dev libgirepository1.0-dev python3-dev"
pkgs="libcairo2 gir1.2-pango-1.0 pkg-config libcairo2-dev libgirepository-2.0-dev python3-dev"
echo "pkgs=$pkgs" >> $GITHUB_OUTPUT
echo "hash=$(echo -n "$pkgs" | sha256sum | cut -d' ' -f1)" >> $GITHUB_OUTPUT
echo "cache_version=1" >> $GITHUB_OUTPUT
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3 changes: 2 additions & 1 deletion Dockerfile
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Expand Up @@ -5,7 +5,8 @@ RUN sed -i 's|http://|https://|g' /etc/apt/sources.list.d/*.sources
RUN apt-get update -q

# Install rendering system dependencies
RUN apt-get install -y libgirepository-1.0-1 libcairo2 gir1.2-pango-1.0 pkg-config libcairo2-dev libgirepository1.0-dev
# (pycairo and PyGObject have no Linux wheels, so they are compiled from source)
RUN apt-get install -y gcc libcairo2 gir1.2-pango-1.0 pkg-config libcairo2-dev libgirepository-2.0-dev

COPY . /pixel-renderer
WORKDIR /pixel-renderer
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8 changes: 6 additions & 2 deletions README.md
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Expand Up @@ -4,16 +4,20 @@ This repository contains a text renderer for PIXEL models.

## Usage

Install dependencies:
Install dependencies (conda-forge provides pre-built Cairo, Pango and PyGObject):

```shell
conda create -n pixel python=3.12 -y
conda activate pixel
conda install -c conda-forge pycairo pygobject pango -y
pip install ".[dev,pangocairo]"
```

> [!TIP]
> Having trouble installing `pycairo` and `pygobject`?
> Without conda, `pycairo` and `PyGObject` are compiled from source and need system libraries.
> On Ubuntu 24.04+ / Debian 13+:
> `sudo apt install gcc pkg-config libcairo2-dev libgirepository-2.0-dev gir1.2-pango-1.0 python3-dev`.
> On older systems (GLib < 2.80, e.g. Ubuntu 22.04), install `libgirepository1.0-dev` and `pip install "PyGObject<3.52"`.
> See [these instructions](https://pygobject.readthedocs.io/en/latest/getting_started.html#installing-pygobject).

Install:
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2 changes: 1 addition & 1 deletion pyproject.toml
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Expand Up @@ -29,7 +29,7 @@ dev = [

pangocairo = [
"pycairo", # To render images using Cairo
"PyGObject<3.52", # Use PyGObject < 3.52 which supports girepository-1.0
"PyGObject", # Python bindings for Pango (via GObject introspection)
]

[tool.setuptools]
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