Upgrade poetry-core range to fix #16147

[thebalaa]

This fixes #16147 but I'm not sure this is precisely the right version bound. Looking through Poetry related issues directly or indirectly related to #16147 I tend to argue Poetry has created more problems than benefit and would prefer removing it altogether.

For example, we are using an unsupported Poetry mechanism for building the Rust synapse.synapse_rust modules, see python-poetry/poetry#2740 (comment)

Happy to make the necessary changes in order to improve the new contributor onboarding experience, whatever they may be.

Pull Request Checklist

• Pull request is based on the develop branch
• [] Pull request includes a changelog file. The entry should:
  • Be a short description of your change which makes sense to users. "Fixed a bug that prevented receiving messages from other servers." instead of "Moved X method from EventStore to EventWorkerStore.".
  • Use markdown where necessary, mostly for code blocks.
  • End with either a period (.) or an exclamation mark (!).
  • Start with a capital letter.
  • Feel free to credit yourself, by adding a sentence "Contributed by @github_username." or "Contributed by [Your Name]." to the end of the entry.
• Pull request includes a sign off
• Code style is correct
  (run the linters)

Signed-off-by: Mo Balaa mo@fractalnetworks.co

[michaelkaye]

This seems to be a) required and b) sufficient to get setup-matrix-synapse installing via poetry again. See https://github.com/michaelkaye/setup-matrix-synapse/actions/runs/7036170569/job/19148201740

[DMRobertson]

Thank you for persisting with this. LGTM per below.

---

Reproduced a broken installation as follows:

docker run -it debian:12-slim bash
apt update
apt install python3 python3-pip pipx git pkg-config libsystemd-dev libicu-dev libpq-dev rustc
pipx install poetry==1.6
pipx ensurepath
exec $SHELL
cd ~
git clone https://github.com/matrix-org/synapse
cd synapse
git checkout v1.97.0
poetry install --all-extras -vv

And then:

$ poetry --version; poetry run python -c "import synapse"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/root/synapse/synapse/__init__.py", line 26, in <module>
    from synapse.util.rust import check_rust_lib_up_to_date
  File "/root/synapse/synapse/util/rust.py", line 20, in <module>
    from synapse.synapse_rust import get_rust_file_digest
ModuleNotFoundError: No module named 'synapse.synapse_rust'

Trying again with newer poetry and this patch:

docker run -it debian:12-slim bash
apt update
apt install python3 python3-pip pipx git pkg-config libsystemd-dev libicu-dev libpq-dev rustc
pipx install poetry==1.7
pipx ensurepath
exec $SHELL
cd ~
git clone https://github.com/matrix-org/synapse
cd synapse
git fetch origin pull/16702/head
git checkout FETCH_HEAD 
poetry install --all-extras -vv

# poetry --version; poetry run python -c "import synapse"
Poetry (version 1.7.0)

[DMRobertson]

Can you add a changelog entry please, so we can get CI churning? I tried to add one to this PR myself, but I don't think I have write access to your fork's branch. Here's my suggestion:

From 161330f3383ee04d8f4d6249e939b3c883540c10 Mon Sep 17 00:00:00 2001
From: David Robertson <davidr@element.io>
Date: Wed, 29 Nov 2023 18:06:22 +0000
Subject: [PATCH] Changelog

---
 changelog.d/16702.misc | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changelog.d/16702.misc

diff --git a/changelog.d/16702.misc b/changelog.d/16702.misc
new file mode 100644
index 0000000000..be5a508208
--- /dev/null
+++ b/changelog.d/16702.misc
@@ -0,0 +1 @@
+Raise poetry-core upper bound to <=1.8.1. This allows contributors to import Synapse after `poetry install`ing with Poetry 1.6 and above.
-- 
2.43.0