acc: Set UV_PYTHON env variable (#2562)

## Changes
Set UV_PYTHON env. variable to test against a single Python version.

Don't expand `EnvMatrix` into sub-tests if there is only a single entry
to avoid additional noise. Add logging so we can debug which env.
variables are used.

## Tests
Using existing acceptance tests

Author: kanterov

acceptance/acceptance_test.go

@@ -218,7 +218,10 @@ func testAccept(t *testing.T, InprocessMode bool, singleTest string) int {
 
 			expanded := internal.ExpandEnvMatrix(config.EnvMatrix)
 
-			if len(expanded) == 1 && len(expanded[0]) == 0 {
+			if len(expanded) == 1 {
+				// env vars aren't part of the test case name, so log them for debugging
+				t.Logf("Running test with env %v", expanded[0])
+
 				runTest(t, dir, coverDir, repls.Clone(), config, configPath, expanded[0])
 			} else {
 				for _, envset := range expanded {

acceptance/bundle/artifacts/script.prepare

@@ -1,6 +1,6 @@
 export PYTHONDONTWRITEBYTECODE=1
 
-uv venv -q --python 3.12 .venv
+uv venv -q .venv
 if [[ "$OSTYPE" == "msys" || "$OSTYPE" == "cygwin" || "$OSTYPE" == "win32" ]]; then
     source .venv/Scripts/activate
 else

acceptance/bundle/python/mutator-ordering/output.txt

@@ -1,5 +1,5 @@
 
->>> uv run --python 3.10 [UV_ARGS] -q [CLI] bundle validate --output json
+>>> uv run [UV_ARGS] -q [CLI] bundle validate --output json
 {
   "experimental": {
     "python": {

acceptance/bundle/python/mutator-ordering/script

@@ -1,6 +1,6 @@
 UV_ARGS="${UV_ARGS//\[\DATABRICKS_BUNDLES_WHEEL\]/$DATABRICKS_BUNDLES_WHEEL}"
 
-trace uv run --python 3.10 $UV_ARGS -q $CLI bundle validate --output json | \
+trace uv run $UV_ARGS -q $CLI bundle validate --output json | \
   jq "pick(.experimental.python, .resources)"
 
 rm -fr .databricks __pycache__

acceptance/bundle/python/resolve-variable/output.txt

@@ -1,5 +1,5 @@
 
->>> uv run --python 3.10 [UV_ARGS] -q [CLI] bundle validate --output json
+>>> uv run [UV_ARGS] -q [CLI] bundle validate --output json
 {
   "experimental": {
     "python": {

acceptance/bundle/python/resolve-variable/script

@@ -1,6 +1,6 @@
 UV_ARGS="${UV_ARGS//\[\DATABRICKS_BUNDLES_WHEEL\]/$DATABRICKS_BUNDLES_WHEEL}"
 
-trace uv run --python 3.10 $UV_ARGS -q $CLI bundle validate --output json | \
+trace uv run $UV_ARGS -q $CLI bundle validate --output json | \
   jq "pick(.experimental.python, .resources)"
 
 rm -fr .databricks __pycache__

acceptance/bundle/python/resource-loading/output.txt

@@ -1,5 +1,5 @@
 
->>> uv run --python 3.10 [UV_ARGS] -q [CLI] bundle validate --output json
+>>> uv run [UV_ARGS] -q [CLI] bundle validate --output json
 {
   "experimental": {
     "python": {

acceptance/bundle/python/resource-loading/script

@@ -1,6 +1,6 @@
 UV_ARGS="${UV_ARGS//\[\DATABRICKS_BUNDLES_WHEEL\]/$DATABRICKS_BUNDLES_WHEEL}"
 
-trace uv run --python 3.10 $UV_ARGS -q $CLI bundle validate --output json | \
+trace uv run $UV_ARGS -q $CLI bundle validate --output json | \
   jq "pick(.experimental.python, .resources)"
 
 rm -fr .databricks __pycache__

acceptance/bundle/templates/experimental-jobs-as-code/output/my_jobs_as_code/pyproject.toml

@@ -4,7 +4,6 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "my_jobs_as_code"
-requires-python = ">=3.10"
 description = "wheel file based on my_jobs_as_code"
 
 # Dependencies in case the output wheel file is used as a library dependency.

acceptance/bundle/templates/experimental-jobs-as-code/script

@@ -12,6 +12,11 @@ trace unzip -Z1 dist/my_jobs_as_code-0.0.1-py3-none-any.whl
 
 rm -fr .venv resources/__pycache__ uv.lock src/my_jobs_as_code.egg-info dist
 
+# remove requires-python because it doesn't pass ruff checks after we replace
+# requires-python=">=3.10" with requires-python=">=[UV_PYTHON]"
+cat pyproject.toml | grep -v requires-python > pyproject.toml.new
+mv pyproject.toml.new pyproject.toml
+
 # Do not affect this repository's git behaviour #2318
 mv .gitignore out.gitignore
 rm .databricks/.gitignore