From bcb68cd3dd2fc8aa93eac38fabb935463115d098 Mon Sep 17 00:00:00 2001
From: Silvan Melchior <silvan.melchior@zuehlke.com>
Date: Tue, 30 Nov 2021 13:59:40 +0100
Subject: [PATCH 1/4] allow co-routines in depends-on decorator

---
 confz/change.py      |  14 ++++-
 poetry.lock          | 131 +++++++++++++++++++++++++++----------------
 pyproject.toml       |   1 +
 tests/test_change.py |  19 +++++++
 4 files changed, 113 insertions(+), 52 deletions(-)

diff --git a/confz/change.py b/confz/change.py
index 0a18b70..0f92494 100644
--- a/confz/change.py
+++ b/confz/change.py
@@ -54,9 +54,17 @@ def __init__(self, fn: Callable[[], Any], config_classes: List[Type['ConfZ']]):
         self._backup_instances = {}
 
     def __call__(self):
-        if self._instance is None:
-            self._instance = self._fn()
-        return self._instance
+        if inspect.iscoroutinefunction(self._fn):
+            async def inner():
+                if self._instance is None:
+                    self._instance = await self._fn()
+                return self._instance
+        else:
+            def inner():
+                if self._instance is None:
+                    self._instance = self._fn()
+                return self._instance
+        return inner()
 
     def change_enter(self, context):
         self._backup_instances[context] = self._instance
diff --git a/poetry.lock b/poetry.lock
index 1bdb87a..2a68f29 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -68,7 +68,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "coverage"
-version = "6.1.2"
+version = "6.2"
 description = "Code coverage measurement for Python"
 category = "dev"
 optional = false
@@ -238,6 +238,20 @@ toml = "*"
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
+[[package]]
+name = "pytest-asyncio"
+version = "0.16.0"
+description = "Pytest support for asyncio."
+category = "dev"
+optional = false
+python-versions = ">= 3.6"
+
+[package.dependencies]
+pytest = ">=5.4.0"
+
+[package.extras]
+testing = ["coverage", "hypothesis (>=5.7.1)"]
+
 [[package]]
 name = "pytest-cov"
 version = "3.0.0"
@@ -460,7 +474,7 @@ testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytes
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "eb6ddff535c657e3fb02d93c073130ac7997dec74291429cabe31d88c8f15381"
+content-hash = "1f10c2d97f53b15b62389f7ff0619f52423bc278e2445eeee312083c9114a173"
 
 [metadata.files]
 alabaster = [
@@ -492,53 +506,53 @@ colorama = [
     {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
 ]
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+    {file = "coverage-6.2-cp38-cp38-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:a9c8c4283e17690ff1a7427123ffb428ad6a52ed720d550e299e8291e33184dc"},
+    {file = "coverage-6.2-cp38-cp38-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:f614fc9956d76d8a88a88bb41ddc12709caa755666f580af3a688899721efecd"},
+    {file = "coverage-6.2-cp38-cp38-musllinux_1_1_aarch64.whl", hash = "sha256:9365ed5cce5d0cf2c10afc6add145c5037d3148585b8ae0e77cc1efdd6aa2953"},
+    {file = "coverage-6.2-cp38-cp38-musllinux_1_1_i686.whl", hash = "sha256:8bdfe9ff3a4ea37d17f172ac0dff1e1c383aec17a636b9b35906babc9f0f5475"},
+    {file = "coverage-6.2-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:63c424e6f5b4ab1cf1e23a43b12f542b0ec2e54f99ec9f11b75382152981df57"},
+    {file = "coverage-6.2-cp38-cp38-win32.whl", hash = "sha256:49dbff64961bc9bdd2289a2bda6a3a5a331964ba5497f694e2cbd540d656dc1c"},
+    {file = "coverage-6.2-cp38-cp38-win_amd64.whl", hash = "sha256:9a29311bd6429be317c1f3fe4bc06c4c5ee45e2fa61b2a19d4d1d6111cb94af2"},
+    {file = "coverage-6.2-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:03b20e52b7d31be571c9c06b74746746d4eb82fc260e594dc662ed48145e9efd"},
+    {file = "coverage-6.2-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:215f8afcc02a24c2d9a10d3790b21054b58d71f4b3c6f055d4bb1b15cecce685"},
+    {file = "coverage-6.2-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:a4bdeb0a52d1d04123b41d90a4390b096f3ef38eee35e11f0b22c2d031222c6c"},
+    {file = "coverage-6.2-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:c332d8f8d448ded473b97fefe4a0983265af21917d8b0cdcb8bb06b2afe632c3"},
+    {file = "coverage-6.2-cp39-cp39-win32.whl", hash = "sha256:6e1394d24d5938e561fbeaa0cd3d356207579c28bd1792f25a068743f2d5b282"},
+    {file = "coverage-6.2-cp39-cp39-win_amd64.whl", hash = "sha256:86f2e78b1eff847609b1ca8050c9e1fa3bd44ce755b2ec30e70f2d3ba3844644"},
+    {file = "coverage-6.2-pp36.pp37.pp38-none-any.whl", hash = "sha256:5829192582c0ec8ca4a2532407bc14c2f338d9878a10442f5d03804a95fac9de"},
+    {file = "coverage-6.2.tar.gz", hash = "sha256:e2cad8093172b7d1595b4ad66f24270808658e11acf43a8f95b41276162eb5b8"},
 ]
 docutils = [
     {file = "docutils-0.17.1-py2.py3-none-any.whl", hash = "sha256:cf316c8370a737a022b72b56874f6602acf974a37a9fba42ec2876387549fc61"},
@@ -570,6 +584,9 @@ markupsafe = [
     {file = "MarkupSafe-2.0.1-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:2d7d807855b419fc2ed3e631034685db6079889a1f01d5d9dac950f764da3dad"},
     {file = "MarkupSafe-2.0.1-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:add36cb2dbb8b736611303cd3bfcee00afd96471b09cda130da3581cbdc56a6d"},
     {file = "MarkupSafe-2.0.1-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:168cd0a3642de83558a5153c8bd34f175a9a6e7f6dc6384b9655d2697312a646"},
+    {file = "MarkupSafe-2.0.1-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:4dc8f9fb58f7364b63fd9f85013b780ef83c11857ae79f2feda41e270468dd9b"},
+    {file = "MarkupSafe-2.0.1-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:20dca64a3ef2d6e4d5d615a3fd418ad3bde77a47ec8a23d984a12b5b4c74491a"},
+    {file = "MarkupSafe-2.0.1-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:cdfba22ea2f0029c9261a4bd07e830a8da012291fbe44dc794e488b6c9bb353a"},
     {file = "MarkupSafe-2.0.1-cp310-cp310-win32.whl", hash = "sha256:99df47edb6bda1249d3e80fdabb1dab8c08ef3975f69aed437cb69d0a5de1e28"},
     {file = "MarkupSafe-2.0.1-cp310-cp310-win_amd64.whl", hash = "sha256:e0f138900af21926a02425cf736db95be9f4af72ba1bb21453432a07f6082134"},
     {file = "MarkupSafe-2.0.1-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:f9081981fe268bd86831e5c75f7de206ef275defcb82bc70740ae6dc507aee51"},
@@ -581,6 +598,9 @@ markupsafe = [
     {file = "MarkupSafe-2.0.1-cp36-cp36m-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:bf5d821ffabf0ef3533c39c518f3357b171a1651c1ff6827325e4489b0e46c3c"},
     {file = "MarkupSafe-2.0.1-cp36-cp36m-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:0d4b31cc67ab36e3392bbf3862cfbadac3db12bdd8b02a2731f509ed5b829724"},
     {file = "MarkupSafe-2.0.1-cp36-cp36m-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:baa1a4e8f868845af802979fcdbf0bb11f94f1cb7ced4c4b8a351bb60d108145"},
+    {file = "MarkupSafe-2.0.1-cp36-cp36m-musllinux_1_1_aarch64.whl", hash = "sha256:deb993cacb280823246a026e3b2d81c493c53de6acfd5e6bfe31ab3402bb37dd"},
+    {file = "MarkupSafe-2.0.1-cp36-cp36m-musllinux_1_1_i686.whl", hash = "sha256:63f3268ba69ace99cab4e3e3b5840b03340efed0948ab8f78d2fd87ee5442a4f"},
+    {file = "MarkupSafe-2.0.1-cp36-cp36m-musllinux_1_1_x86_64.whl", hash = "sha256:8d206346619592c6200148b01a2142798c989edcb9c896f9ac9722a99d4e77e6"},
     {file = "MarkupSafe-2.0.1-cp36-cp36m-win32.whl", hash = "sha256:6c4ca60fa24e85fe25b912b01e62cb969d69a23a5d5867682dd3e80b5b02581d"},
     {file = "MarkupSafe-2.0.1-cp36-cp36m-win_amd64.whl", hash = "sha256:b2f4bf27480f5e5e8ce285a8c8fd176c0b03e93dcc6646477d4630e83440c6a9"},
     {file = "MarkupSafe-2.0.1-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:0717a7390a68be14b8c793ba258e075c6f4ca819f15edfc2a3a027c823718567"},
@@ -592,6 +612,9 @@ markupsafe = [
     {file = "MarkupSafe-2.0.1-cp37-cp37m-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:e9936f0b261d4df76ad22f8fee3ae83b60d7c3e871292cd42f40b81b70afae85"},
     {file = "MarkupSafe-2.0.1-cp37-cp37m-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:2a7d351cbd8cfeb19ca00de495e224dea7e7d919659c2841bbb7f420ad03e2d6"},
     {file = "MarkupSafe-2.0.1-cp37-cp37m-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:60bf42e36abfaf9aff1f50f52644b336d4f0a3fd6d8a60ca0d054ac9f713a864"},
+    {file = "MarkupSafe-2.0.1-cp37-cp37m-musllinux_1_1_aarch64.whl", hash = "sha256:d6c7ebd4e944c85e2c3421e612a7057a2f48d478d79e61800d81468a8d842207"},
+    {file = "MarkupSafe-2.0.1-cp37-cp37m-musllinux_1_1_i686.whl", hash = "sha256:f0567c4dc99f264f49fe27da5f735f414c4e7e7dd850cfd8e69f0862d7c74ea9"},
+    {file = "MarkupSafe-2.0.1-cp37-cp37m-musllinux_1_1_x86_64.whl", hash = "sha256:89c687013cb1cd489a0f0ac24febe8c7a666e6e221b783e53ac50ebf68e45d86"},
     {file = "MarkupSafe-2.0.1-cp37-cp37m-win32.whl", hash = "sha256:a30e67a65b53ea0a5e62fe23682cfe22712e01f453b95233b25502f7c61cb415"},
     {file = "MarkupSafe-2.0.1-cp37-cp37m-win_amd64.whl", hash = "sha256:611d1ad9a4288cf3e3c16014564df047fe08410e628f89805e475368bd304914"},
     {file = "MarkupSafe-2.0.1-cp38-cp38-macosx_10_9_universal2.whl", hash = "sha256:5bb28c636d87e840583ee3adeb78172efc47c8b26127267f54a9c0ec251d41a9"},
@@ -604,6 +627,9 @@ markupsafe = [
     {file = "MarkupSafe-2.0.1-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:6fcf051089389abe060c9cd7caa212c707e58153afa2c649f00346ce6d260f1b"},
     {file = "MarkupSafe-2.0.1-cp38-cp38-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:5855f8438a7d1d458206a2466bf82b0f104a3724bf96a1c781ab731e4201731a"},
     {file = "MarkupSafe-2.0.1-cp38-cp38-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:3dd007d54ee88b46be476e293f48c85048603f5f516008bee124ddd891398ed6"},
+    {file = "MarkupSafe-2.0.1-cp38-cp38-musllinux_1_1_aarch64.whl", hash = "sha256:aca6377c0cb8a8253e493c6b451565ac77e98c2951c45f913e0b52facdcff83f"},
+    {file = "MarkupSafe-2.0.1-cp38-cp38-musllinux_1_1_i686.whl", hash = "sha256:04635854b943835a6ea959e948d19dcd311762c5c0c6e1f0e16ee57022669194"},
+    {file = "MarkupSafe-2.0.1-cp38-cp38-musllinux_1_1_x86_64.whl", hash = "sha256:6300b8454aa6930a24b9618fbb54b5a68135092bc666f7b06901f897fa5c2fee"},
     {file = "MarkupSafe-2.0.1-cp38-cp38-win32.whl", hash = "sha256:023cb26ec21ece8dc3907c0e8320058b2e0cb3c55cf9564da612bc325bed5e64"},
     {file = "MarkupSafe-2.0.1-cp38-cp38-win_amd64.whl", hash = "sha256:984d76483eb32f1bcb536dc27e4ad56bba4baa70be32fa87152832cdd9db0833"},
     {file = "MarkupSafe-2.0.1-cp39-cp39-macosx_10_9_universal2.whl", hash = "sha256:2ef54abee730b502252bcdf31b10dacb0a416229b72c18b19e24a4509f273d26"},
@@ -616,6 +642,9 @@ markupsafe = [
     {file = "MarkupSafe-2.0.1-cp39-cp39-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:c47adbc92fc1bb2b3274c4b3a43ae0e4573d9fbff4f54cd484555edbf030baf1"},
     {file = "MarkupSafe-2.0.1-cp39-cp39-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:37205cac2a79194e3750b0af2a5720d95f786a55ce7df90c3af697bfa100eaac"},
     {file = "MarkupSafe-2.0.1-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:1f2ade76b9903f39aa442b4aadd2177decb66525062db244b35d71d0ee8599b6"},
+    {file = "MarkupSafe-2.0.1-cp39-cp39-musllinux_1_1_aarch64.whl", hash = "sha256:4296f2b1ce8c86a6aea78613c34bb1a672ea0e3de9c6ba08a960efe0b0a09047"},
+    {file = "MarkupSafe-2.0.1-cp39-cp39-musllinux_1_1_i686.whl", hash = "sha256:9f02365d4e99430a12647f09b6cc8bab61a6564363f313126f775eb4f6ef798e"},
+    {file = "MarkupSafe-2.0.1-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:5b6d930f030f8ed98e3e6c98ffa0652bdb82601e7a016ec2ab5d7ff23baa78d1"},
     {file = "MarkupSafe-2.0.1-cp39-cp39-win32.whl", hash = "sha256:10f82115e21dc0dfec9ab5c0223652f7197feb168c940f3ef61563fc2d6beb74"},
     {file = "MarkupSafe-2.0.1-cp39-cp39-win_amd64.whl", hash = "sha256:693ce3f9e70a6cf7d2fb9e6c9d8b204b6b39897a2c4a1aa65728d5ac97dcc1d8"},
     {file = "MarkupSafe-2.0.1.tar.gz", hash = "sha256:594c67807fb16238b30c44bdf74f36c02cdf22d1c8cda91ef8a0ed8dabf5620a"},
@@ -668,6 +697,10 @@ pytest = [
     {file = "pytest-6.2.5-py3-none-any.whl", hash = "sha256:7310f8d27bc79ced999e760ca304d69f6ba6c6649c0b60fb0e04a4a77cacc134"},
     {file = "pytest-6.2.5.tar.gz", hash = "sha256:131b36680866a76e6781d13f101efb86cf674ebb9762eb70d3082b6f29889e89"},
 ]
+pytest-asyncio = [
+    {file = "pytest-asyncio-0.16.0.tar.gz", hash = "sha256:7496c5977ce88c34379df64a66459fe395cd05543f0a2f837016e7144391fcfb"},
+    {file = "pytest_asyncio-0.16.0-py3-none-any.whl", hash = "sha256:5f2a21273c47b331ae6aa5b36087047b4899e40f03f18397c0e65fa5cca54e9b"},
+]
 pytest-cov = [
     {file = "pytest-cov-3.0.0.tar.gz", hash = "sha256:e7f0f5b1617d2210a2cabc266dfe2f4c75a8d32fb89eafb7ad9d06f6d076d470"},
     {file = "pytest_cov-3.0.0-py3-none-any.whl", hash = "sha256:578d5d15ac4a25e5f961c938b85a05b09fdaae9deef3bb6de9a6e766622ca7a6"},
diff --git a/pyproject.toml b/pyproject.toml
index 7d4f444..5e009e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,6 +26,7 @@ python-dotenv = "^0.19.2"
 pytest = "^6.2.5"
 Sphinx = "^4.2.0"
 pytest-cov = "^3.0.0"
+pytest-asyncio = "^0.16.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
diff --git a/tests/test_change.py b/tests/test_change.py
index 9034350..2010c99 100644
--- a/tests/test_change.py
+++ b/tests/test_change.py
@@ -1,3 +1,5 @@
+import pytest
+
 from confz import ConfZ, ConfZDataSource, depends_on
 
 
@@ -80,3 +82,20 @@ def my_fn2():
     assert my_fn2() == 'val2'
     assert my_fn1() is config_before1
     assert my_fn2() is config_before2
+
+
+@pytest.mark.asyncio
+async def test_depends_async():
+    @depends_on
+    async def my_fn_async():
+        return 'val1'
+
+    @depends_on
+    def my_fn_sync():
+        return 'val2'
+
+    assert await my_fn_async() == 'val1'
+    assert await my_fn_async() is await my_fn_async()
+
+    assert my_fn_sync() == 'val2'
+    assert my_fn_sync() is my_fn_sync()

From 84d8b27f5fe5670f39c9bd5ae953e8db72cef90b Mon Sep 17 00:00:00 2001
From: Silvan Melchior <silvan.melchior@zuehlke.com>
Date: Tue, 30 Nov 2021 14:17:08 +0100
Subject: [PATCH 2/4] adjust documentation to mention async singletons

---
 docs/source/usage/listeners.rst | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/docs/source/usage/listeners.rst b/docs/source/usage/listeners.rst
index 5681ae6..b36657c 100644
--- a/docs/source/usage/listeners.rst
+++ b/docs/source/usage/listeners.rst
@@ -35,6 +35,21 @@ changed because we are in a config change context manager and the function gets
 allowing the new config to take effect. As soon as the context is left again, the original instance of the function
 singleton will be active again.
 
+This decorator also works for asynchronous functions::
+
+    from confz import depends_on
+
+    @depends_on(DBConfig)
+    async def my_fn():
+        engine = create_async_engine(f'sqlite:///{DBConfig().path}', echo=True)
+
+        async with engine.begin() as conn:
+            await conn.run_sync(meta.drop_all)
+            await conn.run_sync(meta.create_all)
+
+        return engine
+
+
 Early Loading
 -------------
 

From 52ce0e9a79e16d9c03d8ca43221dbbd4ca52705d Mon Sep 17 00:00:00 2001
From: Silvan Melchior <silvan.melchior@zuehlke.com>
Date: Tue, 30 Nov 2021 14:19:55 +0100
Subject: [PATCH 3/4] increase version number

---
 pyproject.toml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pyproject.toml b/pyproject.toml
index 90074f6..ad5dd29 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "confz"
-version = "1.1.0"
+version = "1.2.0"
 description = "ConfZ is a configuration management library for Python based on pydantic."
 license = "MIT"
 authors = ["Zühlke"]

From 9fd1a00ada737cb5589600aad4b7be5fd49ae671 Mon Sep 17 00:00:00 2001
From: Silvan Melchior <silvan.melchior@zuehlke.com>
Date: Tue, 30 Nov 2021 14:22:28 +0100
Subject: [PATCH 4/4] improved docs function naming

---
 docs/source/usage/listeners.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/source/usage/listeners.rst b/docs/source/usage/listeners.rst
index b36657c..8a66191 100644
--- a/docs/source/usage/listeners.rst
+++ b/docs/source/usage/listeners.rst
@@ -40,7 +40,7 @@ This decorator also works for asynchronous functions::
     from confz import depends_on
 
     @depends_on(DBConfig)
-    async def my_fn():
+    async def get_engine():
         engine = create_async_engine(f'sqlite:///{DBConfig().path}', echo=True)
 
         async with engine.begin() as conn: