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mautrix-telegram: patch away alembic dependency

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`alembic`[1] is a database migration tool which is invoked from the CLI
when installing the telegram bridge, but never needed during the
runtime.

The reason why `alembic` is required here is to ensure that it
exists in the Python environment when deploying the bridge. However
`alembic` requires `mautrix-telegram` in its environment to create a
database schema from the Python models.

Such a dependency relation may be possible with tools like virtualenv,
however it'll result in an infinite recursion at evaluation time in Nix.

With this patch, `mautrix-telegram` doesn't depend on `alembic` anymore
and provides a patched alembic (`pkgs.mautrix-telegram.alembic`) which
has `mautrix-telegram` in its path.

[1] https://alembic.sqlalchemy.org/en/latest/
This commit is contained in:
Maximilian Bosch 2019-04-14 12:02:26 +02:00
parent f839011719
commit 0a94f89fca
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GPG Key ID: 091DBF4D1FC46B8E
2 changed files with 20 additions and 4 deletions
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22
pkgs/servers/mautrix-telegram/default.nix
View File

@ -1,4 +1,4 @@
{ lib, python3 }:
{ lib, python3, mautrix-telegram }:
with python3.pkgs;
@ -11,11 +11,15 @@ buildPythonPackage rec {
sha256 = "51951845e52c4ca5410e0f4a51d99014dd6df2fcedfca8b7241e045359cbf112";
};
postPatch = ''
sed -i -e '/alembic>/d' setup.py
'';
propagatedBuildInputs = [
Mako
aiohttp
mautrix-appservice
sqlalchemy
alembic
CommonMark
ruamel_yaml
future-fstrings
@ -26,6 +30,18 @@ buildPythonPackage rec {
lxml
];
# `alembic` (a database migration tool) is only needed for the initial setup,
# and not needed during the actual runtime. However `alembic` requires `mautrix-telegram`
# in its environment to create a database schema from all models.
#
# Hence we need to patch away `alembic` from `mautrix-telegram` and create an `alembic`
# which has `mautrix-telegram` in its environment.
passthru.alembic = alembic.overrideAttrs (old: {
propagatedBuildInputs = old.propagatedBuildInputs ++ [
mautrix-telegram
];
});
checkInputs = [
pytest
pytestrunner
@ -37,6 +53,6 @@ buildPythonPackage rec {
homepage = https://github.com/tulir/mautrix-telegram;
description = "A Matrix-Telegram hybrid puppeting/relaybot bridge";
license = licenses.agpl3Plus;
maintainers = with maintainers; [ nyanloutre ];
maintainers = with maintainers; [ nyanloutre ma27 ];
};
}

2
pkgs/top-level/all-packages.nix
View File

@ -3908,7 +3908,7 @@ in
matrix-synapse = callPackage ../servers/matrix-synapse { };
mautrix-telegram = callPackage ../servers/mautrix-telegram { };
mautrix-telegram = recurseIntoAttrs (callPackage ../servers/mautrix-telegram { });
mautrix-whatsapp = callPackage ../servers/mautrix-whatsapp { };