Migrate to psycopg3

SQLAlchemy 2.0 brings support for the latest version of the psycopg
PostgreSQL database driver. With the migration to 2.0 done, we can
switch to this now.

3 files changed, 130 insertions, 80 deletions

diff --git a/poetry.lock b/poetry.lock
index cdb04c1..64c272b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,6 +1,35 @@
 # This file is automatically @generated by Poetry 1.4.0 and should not be changed by hand.
 
 [[package]]
+name = "backports-zoneinfo"
+version = "0.2.1"
+description = "Backport of the standard library zoneinfo module"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+files = [
+    {file = "backports.zoneinfo-0.2.1-cp36-cp36m-macosx_10_14_x86_64.whl", hash = "sha256:da6013fd84a690242c310d77ddb8441a559e9cb3d3d59ebac9aca1a57b2e18bc"},
+    {file = "backports.zoneinfo-0.2.1-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:89a48c0d158a3cc3f654da4c2de1ceba85263fafb861b98b59040a5086259722"},
+    {file = "backports.zoneinfo-0.2.1-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:1c5742112073a563c81f786e77514969acb58649bcdf6cdf0b4ed31a348d4546"},
+    {file = "backports.zoneinfo-0.2.1-cp36-cp36m-win32.whl", hash = "sha256:e8236383a20872c0cdf5a62b554b27538db7fa1bbec52429d8d106effbaeca08"},
+    {file = "backports.zoneinfo-0.2.1-cp36-cp36m-win_amd64.whl", hash = "sha256:8439c030a11780786a2002261569bdf362264f605dfa4d65090b64b05c9f79a7"},
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+    {file = "backports.zoneinfo-0.2.1-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:17746bd546106fa389c51dbea67c8b7c8f0d14b5526a579ca6ccf5ed72c526cf"},
+    {file = "backports.zoneinfo-0.2.1-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:5c144945a7752ca544b4b78c8c41544cdfaf9786f25fe5ffb10e838e19a27570"},
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+    {file = "backports.zoneinfo-0.2.1-cp38-cp38-manylinux1_i686.whl", hash = "sha256:e81b76cace8eda1fca50e345242ba977f9be6ae3945af8d46326d776b4cf78d1"},
+    {file = "backports.zoneinfo-0.2.1-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:7b0a64cda4145548fed9efc10322770f929b944ce5cee6c0dfe0c87bf4c0c8c9"},
+    {file = "backports.zoneinfo-0.2.1-cp38-cp38-win32.whl", hash = "sha256:1b13e654a55cd45672cb54ed12148cd33628f672548f373963b0bff67b217328"},
+    {file = "backports.zoneinfo-0.2.1-cp38-cp38-win_amd64.whl", hash = "sha256:4a0f800587060bf8880f954dbef70de6c11bbe59c673c3d818921f042f9954a6"},
+    {file = "backports.zoneinfo-0.2.1.tar.gz", hash = "sha256:fadbfe37f74051d024037f223b8e001611eac868b5c5b06144ef4d8b799862f2"},
+]
+
+[package.extras]
+tzdata = ["tzdata"]
+
+[[package]]
 name = "greenlet"
 version = "2.0.2"
 description = "Lightweight in-process concurrent programming"
@@ -75,84 +104,92 @@ docs = ["Sphinx", "docutils (<0.18)"]
 test = ["objgraph", "psutil"]
 
 [[package]]
-name = "psycopg2-binary"
-version = "2.9.5"
-description = "psycopg2 - Python-PostgreSQL Database Adapter"
+name = "psycopg"
+version = "3.1.8"
+description = "PostgreSQL database adapter for Python"
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
+files = [
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+    {file = "psycopg-3.1.8.tar.gz", hash = "sha256:59b4a71536b146925513c0234dfd1dc42b81e65d56ce5335dff4813434dbc113"},
+]
+
+[package.dependencies]
+"backports.zoneinfo" = {version = ">=0.2.0", markers = "python_version < \"3.9\""}
+typing-extensions = ">=4.1"
+tzdata = {version = "*", markers = "sys_platform == \"win32\""}
+
+[package.extras]
+binary = ["psycopg-binary (>=3.1.6,<=3.1.8)"]
+c = ["psycopg-c (>=3.1.6,<=3.1.8)"]
+dev = ["black (>=22.3.0)", "dnspython (>=2.1)", "flake8 (>=4.0)", "mypy (>=0.990)", "types-setuptools (>=57.4)", "wheel (>=0.37)"]
+docs = ["Sphinx (>=5.0)", "furo (==2022.6.21)", "sphinx-autobuild (>=2021.3.14)", "sphinx-autodoc-typehints (>=1.12)"]
+pool = ["psycopg-pool"]
+test = ["mypy (>=0.990)", "pproxy (>=2.7)", "pytest (>=6.2.5)", "pytest-asyncio (>=0.17)", "pytest-cov (>=3.0)", "pytest-randomly (>=3.5)"]
+
+[[package]]
+name = "psycopg-binary"
+version = "3.1.8"
+description = "PostgreSQL database adapter for Python -- C optimisation distribution"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
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 ]
 
 [[package]]
@@ -299,7 +336,19 @@ files = [
     {file = "typing_extensions-4.5.0.tar.gz", hash = "sha256:5cb5f4a79139d699607b3ef622a1dedafa84e115ab0024e0d9c044a9479ca7cb"},
 ]
 
+[[package]]
+name = "tzdata"
+version = "2023.3"
+description = "Provider of IANA time zone data"
+category = "dev"
+optional = false
+python-versions = ">=2"
+files = [
+    {file = "tzdata-2023.3-py2.py3-none-any.whl", hash = "sha256:7e65763eef3120314099b6939b5546db7adce1e7d6f2e179e3df563c70511eda"},
+    {file = "tzdata-2023.3.tar.gz", hash = "sha256:11ef1e08e54acb0d4f95bdb1be05da659673de4acbd21bf9c69e94cc5e907a3a"},
+]
+
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.8"
-content-hash = "64402981bef5e63850c92009ad4edf7450c4c5efbf9221b05c374767e33e89f1"
+content-hash = "6eb4f8e1aa5e50ffa08da27a3f5ff4e1dd57d3e115c4823f6359037d4c7ef2b5"
diff --git a/pyproject.toml b/pyproject.toml
index e2a8c0d..6cfc36c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,8 +20,9 @@ python-dateutil = "^2.8.2"
 quarg = 'quarg.main:main'
 
 [tool.poetry.group.dev.dependencies]
-psycopg2-binary = "^2.9.5"
 ruff = "^0.0.260"
+psycopg-binary = "^3.1.8"
+psycopg = "^3.1.8"
 
 [build-system]
 requires = ["poetry-core"]
diff --git a/quarg.1 b/quarg.1
index d397eaf..5af621a 100644
--- a/quarg.1
+++ b/quarg.1
@@ -1,4 +1,4 @@
-.Dd May 8, 2021
+.Dd March 30, 2023
 .Dt QUARG 1
 .Os
 .Sh NAME
@@ -290,7 +290,7 @@ instance.
 .Pp
 .Nm
 uses SQLAlchemy which supports both SQLite and PostgreSQL backends.
-The psycopg2 backend is recommended for the latter.
+The psycopg backend is recommended for the latter.
 .Pp
 If Quassel uses the PostgreSQL backend,
 it is highly recommended to set up a read-only database role
@@ -320,7 +320,7 @@ The following is a valid configuration file specifying a connection to a
 local PostgreSQL instance via its default socket:
 .Bd -literal -offset indent
 [Database]
-url = postgresql+psycopg2://quarg@/quassel?host=/run/postgresql
+url = postgresql+psycopg://quarg@/quassel?host=/run/postgresql
 .Ed
 .Sh FILES
 .Bl -tag -width Ds