Saga plugin installation steps causing Docker build to fail

[Robinlovelace]

With the following message:

Dockerfile:48
--------------------
  46 |     RUN sh -c 'echo "deb [arch=amd64 signed-by=/etc/apt/keyrings/qgis-archive-keyring.gpg] https://qgis.org/ubuntugis `lsb_release -c -s` main" > /etc/apt/sources.list.d/qgis.list'
  47 |     RUN apt-get update
  48 | >>> RUN apt-get install -y qgis qgis-plugin-grass saga
  49 |     RUN wget -qO sagang_plugin.zip https://plugins.qgis.org/plugins/processing_saga_nextgen/version/0.0.7/download/
  50 |     RUN unzip -q sagang_plugin.zip -d /home/rstudio/.local/share/QGIS/QGIS3/profiles/default/python/plugins
--------------------
ERROR: failed to solve: process "/bin/sh -c apt-get install -y qgis qgis-plugin-grass saga" did not complete successfully: exit code: 100
Error: buildx failed with: ERROR: failed to solve: process "/bin/sh -c apt-get install -y qgis qgis-plugin-grass saga" did not complete successfully: exit code: 100

Source: https://github.com/geocompx/docker/actions/runs/6321057960/job/17164486628#step:8:644

Relevant lines:

docker/qgis/Dockerfile

Lines 48 to 50 in 00f4c90

	RUN apt-get install -y qgis qgis-plugin-grass saga
	RUN wget -qO sagang_plugin.zip https://plugins.qgis.org/plugins/processing_saga_nextgen/version/0.0.7/download/
	RUN unzip -q sagang_plugin.zip -d /home/rstudio/.local/share/QGIS/QGIS3/profiles/default/python/plugins

Any ideas @jannes-m ?

[nyalldawson]

Isn't it the apt-get step here which is failing, not anything to do with the saga plugin?

[florisvdh]

Hi @Robinlovelace I saw your issue in the saga plugin.

My guess however is that you're installing QGIS from its ubuntugis repo (tailored to work with ubuntugis-unstable PPA; updated monthly or so), while two days ago GRASS has been updated in the PPA, typically breaking qgis-plugin-grass installation from QGIS repo. In the {qgisprocess} GHA workflow I therefore install QGIS from the ubuntugis-nightly-release repo, which is much quicker at levelling up with the PPA.

https://github.com/r-spatial/qgisprocess/blob/a88e665f6a9c960aba0e5f4bd6ca94d005676720/.github/workflows/R-CMD-check.yaml#L78C141-L78C141

[florisvdh]

the ubuntugis-nightly-release repo, which is much quicker at levelling up with the PPA

But I think you'll have to wait a little longer; latest build there is 2023-09-23. https://ubuntu.qgis.org/ubuntu-nightly/pool/main/q/qgis/?C=M;O=D

[jannes-m]

I am trying to build the image locally at the moment. And as @nyalldawson already mentionend, SAGA is not the problem. Instead an incompatible version of GRASS should be installed as already suspected by @florisvdh. Currently, I am using ubuntugis-nightly-release repo, let's see if this works out, probably not if the latest build is 2023-09-23. In any case, to avoid this issue in the future, let's switch to the ubuntugis-nightly-release.

[jannes-m]

Locally, I could successfully build the container, so closing via 815c5a2.

[florisvdh]

latest build there is 2023-09-23. https://ubuntu.qgis.org/ubuntu-nightly/pool/main/q/qgis/?C=M;O=D

I was looking in the wrong place here; that's the URL of Ubuntu-nightly, built against the Ubuntu GDAL etc, not against the PPA. Of course the URL must be https://ubuntugis.qgis.org/ubuntugis-nightly-release/pool/main/q/qgis/?C=M;O=D. Latest build there is from 2023-09-24 17:12 which indeed appears to work with current GRASS already 🚀 .

[Robinlovelace]

Great job all, just checking this after busy day, stoked to see it's fixed. Thank you!