tox: try using uv for CI, should result in speedup

see #391

.ci/run

@@ -37,5 +37,8 @@ if ! command -v python3 &> /dev/null; then
  PY_BIN="python"
 fi
 
-"$PY_BIN" -m pip install --user tox
-"$PY_BIN" -m tox --parallel --parallel-live "$@"
+"$PY_BIN" -m pip install --user uv
+
+# TODO hmm for some reason "$PY_BIN" -m uv tool fails with missing setuptools error??
+# even though it should be equivalent to uvx?
+uvx --with=tox-uv tox run-parallel --parallel-live "$@" # --parallel-live to show outputs while it's running

my/core/__main__.py

@@ -373,8 +373,9 @@ def module_install(*, user: bool, module: Sequence[str], parallel: bool=False, b
  warning('requirements list is empty, no need to install anything')
  return
 
+ use_uv = 'HPI_MODULE_INSTALL_USE_UV' in os.environ
  pre_cmd = [
- sys.executable, '-m', 'pip',
+ sys.executable, '-m', *(['uv'] if use_uv else []), 'pip',
  'install',
  *(['--user'] if user else []), # todo maybe instead, forward all the remaining args to pip?
  *(['--break-system-packages'] if break_system_packages else []), # https://peps.python.org/pep-0668/

tox.ini

@@ -17,14 +17,14 @@ passenv =
  PYTHONPYCACHEPREFIX
  MYPY_CACHE_DIR
  RUFF_CACHE_DIR
+uv_seed = true # seems necessary so uv creates separate venvs per tox env?
 
 
 # note: --use-pep517 below is necessary for tox --parallel flag to work properly
 # otherwise it seems that it tries to modify .eggs dir in parallel and it fails
 
 
 [testenv:ruff]
-install_command = {envpython} -m pip install --use-pep517 {opts} {packages}
 deps =
  -e .[testing]
 commands =
@@ -33,7 +33,6 @@ commands =
 
 # just the very core tests with minimal dependencies
 [testenv:tests-core]
-install_command = {envpython} -m pip install --use-pep517 {opts} {packages}
 deps =
  -e .[testing]
 commands =
@@ -56,9 +55,10 @@ setenv =
  # TODO not sure if need it?
  MY_CONFIG=nonexistent
  HPI_TESTS_USES_OPTIONAL_DEPS=true
-install_command = {envpython} -m pip install --use-pep517 {opts} {packages}
+ HPI_MODULE_INSTALL_USE_UV=true
 deps =
  -e .[testing]
+ uv # for hpi module install
  cachew
  ijson # optional dependency for various modules
 commands =
@@ -93,7 +93,6 @@ commands =
 
 
 [testenv:mypy-core]
-install_command = {envpython} -m pip install --use-pep517 {opts} {packages}
 deps =
  -e .[testing,optional]
  orgparse # for core.orgmode
@@ -109,9 +108,11 @@ commands =
 # specific modules that are known to be mypy compliant (to avoid false negatives)
 # todo maybe split into separate jobs? need to add comment how to run
 [testenv:mypy-misc]
-install_command = {envpython} -m pip install --use-pep517 {opts} {packages}
+setenv =
+ HPI_MODULE_INSTALL_USE_UV=true
 deps =
  -e .[testing,optional]
+ uv # for hpi module install
  lxml-stubs # for my.smscalls
  types-protobuf # for my.google.maps.android
  types-Pillow # for my.photos