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

see https://github.com/karlicoss/HPI/issues/391

.ci/run

@@ -11,6 +11,8 @@ if ! command -v sudo; then
     }
 fi
 
+# --parallel-live to show outputs while it's running
+tox_cmd='run-parallel --parallel-live'
 if [ -n "${CI-}" ]; then
     # install OS specific stuff here
     case "$OSTYPE" in
@@ -20,7 +22,8 @@ if [ -n "${CI-}" ]; then
         ;;
     cygwin* | msys* | win*)
         # windows
-        :
+        # ugh. parallel stuff seems super flaky under windows, some random failures, "file used by other process" and crap like that
+        tox_cmd='run'
         ;;
     *)
         # must be linux?
@@ -37,5 +40,9 @@ 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 "$@"
+
+# TODO hmm for some reason installing uv with pip and then running
+# "$PY_BIN" -m uv tool fails with missing setuptools error??
+# just uvx directly works, but it's not present in PATH...
+"$PY_BIN" -m pip install --user pipx
+"$PY_BIN" -m pipx run uv tool run --with=tox-uv tox $tox_cmd "$@"

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

@@ -17,6 +17,9 @@ passenv =
     PYTHONPYCACHEPREFIX
     MYPY_CACHE_DIR
     RUFF_CACHE_DIR
+setenv =
+    HPI_MODULE_INSTALL_USE_UV=true
+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
@@ -24,7 +27,6 @@ passenv =
 
 
 [testenv:ruff]
-install_command = {envpython} -m pip install --use-pep517 {opts} {packages}
 deps =
     -e .[testing]
 commands =
@@ -33,7 +35,6 @@ 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 +57,9 @@ 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}
 deps =
     -e .[testing]
+    uv              # for hpi module install
     cachew
     ijson  # optional dependency for various modules
 commands =
@@ -93,7 +94,6 @@ commands =
 
 
 [testenv:mypy-core]
-install_command = {envpython} -m pip install --use-pep517 {opts} {packages}
 deps =
     -e .[testing,optional]
     orgparse  # for core.orgmode
@@ -109,9 +109,9 @@ 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}
 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