bundle/artifacts/whl/infer.go

@@ -16,6 +16,12 @@ type infer struct {
 func (m *infer) Apply(ctx context.Context, b *bundle.Bundle) diag.Diagnostics {
 	artifact := b.Config.Artifacts[m.name]
 
+	// TODO use python.DetectVEnvExecutable once bundle has a way to specify venv path
+	py, err := python.DetectExecutable(ctx)
+	if err != nil {
+		return diag.FromErr(err)
+	}
+
 	// Note: using --build-number (build tag) flag does not help with re-installing
 	// libraries on all-purpose clusters. The reason is that `pip` ignoring build tag
 	// when upgrading the library and only look at wheel version.
@@ -30,9 +36,7 @@ func (m *infer) Apply(ctx context.Context, b *bundle.Bundle) diag.Diagnostics {
 	//   version=datetime.datetime.utcnow().strftime("%Y%m%d.%H%M%S"),
 	// ...
 	//)
-
+	artifact.BuildCommand = fmt.Sprintf(`"%s" setup.py bdist_wheel`, py)
-	py := python.GetExecutable()
-	artifact.BuildCommand = fmt.Sprintf(`%s setup.py bdist_wheel`, py)
 
 	return nil
 }

bundle/config/mutator/python/python_mutator_test.go

@@ -541,7 +541,7 @@ func TestLoadDiagnosticsFile_nonExistent(t *testing.T) {
 
 func TestInterpreterPath(t *testing.T) {
 	if runtime.GOOS == "windows" {
-		assert.Equal(t, "venv\\Scripts\\python.exe", interpreterPath("venv"))
+		assert.Equal(t, "venv\\Scripts\\python3.exe", interpreterPath("venv"))
 	} else {
 		assert.Equal(t, "venv/bin/python3", interpreterPath("venv"))
 	}
@@ -673,7 +673,7 @@ func withFakeVEnv(t *testing.T, venvPath string) {
 
 func interpreterPath(venvPath string) string {
 	if runtime.GOOS == "windows" {
-		return filepath.Join(venvPath, "Scripts", "python.exe")
+		return filepath.Join(venvPath, "Scripts", "python3.exe")
 	} else {
 		return filepath.Join(venvPath, "bin", "python3")
 	}

internal/testutil/cmd.go

@@ -0,0 +1,26 @@
+package testutil
+
+import (
+	"bytes"
+	"os"
+	"os/exec"
+
+	"github.com/stretchr/testify/require"
+)
+
+func RunCommand(t TestingT, name string, args ...string) {
+	cmd := exec.Command(name, args...)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	require.NoError(t, cmd.Run())
+}
+
+func CaptureCommandOutput(t TestingT, name string, args ...string) string {
+	cmd := exec.Command(name, args...)
+	var stdout bytes.Buffer
+	cmd.Stdout = &stdout
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	require.NoError(t, err)
+	return stdout.String()
+}

internal/testutil/env.go

@@ -61,3 +61,25 @@ func Chdir(t TestingT, dir string) string {
 
 	return wd
 }
+
+func InsertPathEntry(t TestingT, path string) {
+	var separator string
+	if runtime.GOOS == "windows" {
+		separator = ";"
+	} else {
+		separator = ":"
+	}
+
+	t.Setenv("PATH", path+separator+os.Getenv("PATH"))
+}
+
+func InsertVirtualenvInPath(t TestingT, venvPath string) {
+	if runtime.GOOS == "windows" {
+		// https://github.com/pypa/virtualenv/commit/993ba1316a83b760370f5a3872b3f5ef4dd904c1
+		venvPath = filepath.Join(venvPath, "Scripts")
+	} else {
+		venvPath = filepath.Join(venvPath, "bin")
+	}
+
+	InsertPathEntry(t, venvPath)
+}

libs/python/detect.go

@@ -11,19 +11,6 @@ import (
 	"runtime"
 )
 
-// GetExecutable gets appropriate python binary name for the platform
-func GetExecutable() string {
-	// On Windows when virtualenv is created, the <env>/Scripts directory
-	// contains python.exe but no python3.exe.
-	// Most installers (e.g. the ones from python.org) only install python.exe and not python3.exe
-
-	if runtime.GOOS == "windows" {
-		return "python"
-	} else {
-		return "python3"
-	}
-}
-
 // DetectExecutable looks up the path to the python3 executable from the PATH
 // environment variable.
 //
@@ -39,16 +26,31 @@ func DetectExecutable(ctx context.Context) (string, error) {
 	//
 	// See https://github.com/pyenv/pyenv#understanding-python-version-selection
 
-	out, err := exec.LookPath(GetExecutable())
+	// On Windows when virtualenv is created, the <env>/Scripts directory
+	// contains python.exe but no python3.exe. However, system python does have python3 entry
+	// and it is also added to PATH, so it is found first.
+	if runtime.GOOS == "windows" {
+		out, err := exec.LookPath("python.exe")
+		if err == nil && out != "" {
+			return out, nil
+		}
+		if err != nil && !errors.Is(err, exec.ErrNotFound) {
+			return "", err
+		}
+	}
+
+	out, err := exec.LookPath("python3")
 
 	// most of the OS'es have python3 in $PATH, but for those which don't,
 	// we perform the latest version lookup
 	if err != nil && !errors.Is(err, exec.ErrNotFound) {
 		return "", err
 	}
+
 	if out != "" {
 		return out, nil
 	}
+
 	// otherwise, detect all interpreters and pick the least that satisfies
 	// minimal version requirements
 	all, err := DetectInterpreters(ctx)
@@ -69,7 +71,7 @@ func DetectExecutable(ctx context.Context) (string, error) {
 func DetectVEnvExecutable(venvPath string) (string, error) {
 	interpreterPath := filepath.Join(venvPath, "bin", "python3")
 	if runtime.GOOS == "windows" {
-		interpreterPath = filepath.Join(venvPath, "Scripts", "python.exe")
+		interpreterPath = filepath.Join(venvPath, "Scripts", "python3.exe")
 	}
 
 	if _, err := os.Stat(interpreterPath); err != nil {

libs/python/detect_test.go

@@ -39,7 +39,7 @@ func TestDetectVEnvExecutable_badLayout(t *testing.T) {
 
 func interpreterPath(venvPath string) string {
 	if runtime.GOOS == "windows" {
-		return filepath.Join(venvPath, "Scripts", "python.exe")
+		return filepath.Join(venvPath, "Scripts", "python3.exe")
 	} else {
 		return filepath.Join(venvPath, "bin", "python3")
 	}

libs/python/pythontest/pythontest.go

@@ -2,106 +2,31 @@ package pythontest
 
 import (
 	"context"
-	"errors"
-	"fmt"
-	"os"
-	"os/exec"
 	"path/filepath"
-	"runtime"
 	"strings"
-	"testing"
 
 	"github.com/databricks/cli/internal/testutil"
+	"github.com/databricks/cli/libs/python"
 	"github.com/stretchr/testify/require"
 )
 
-type VenvOpts struct {
+func RequirePythonVENV(t testutil.TestingT, ctx context.Context, pythonVersion string, checkVersion bool) string {
-	// input
+	tmpDir := t.TempDir()
-	PythonVersion    string
+	testutil.Chdir(t, tmpDir)
-	skipVersionCheck bool
 
-	// input/output
+	venvName := testutil.RandomName("test-venv-")
-	Dir  string
+	testutil.RunCommand(t, "uv", "venv", venvName, "--python", pythonVersion, "--seed")
-	Name string
+	testutil.InsertVirtualenvInPath(t, filepath.Join(tmpDir, venvName))
 
-	// output:
+	pythonExe, err := python.DetectExecutable(ctx)
-	// Absolute path to venv
-	EnvPath string
-
-	// Absolute path to venv/bin or venv/Scripts, depending on OS
-	BinPath string
-
-	// Absolute path to python binary
-	PythonExe string
-}
-
-func CreatePythonEnv(opts *VenvOpts) error {
-	if opts == nil || opts.PythonVersion == "" {
-		return errors.New("PythonVersion must be provided")
-	}
-	if opts.Name == "" {
-		opts.Name = testutil.RandomName("test-venv-")
-	}
-
-	cmd := exec.Command("uv", "venv", opts.Name, "--python", opts.PythonVersion, "--seed", "-q")
-	cmd.Stdout = os.Stdout
-	cmd.Stderr = os.Stderr
-	cmd.Dir = opts.Dir
-	err := cmd.Run()
-	if err != nil {
-		return err
-	}
-
-	opts.EnvPath, err = filepath.Abs(filepath.Join(opts.Dir, opts.Name))
-	if err != nil {
-		return err
-	}
-
-	_, err = os.Stat(opts.EnvPath)
-	if err != nil {
-		return fmt.Errorf("cannot stat EnvPath %s: %s", opts.EnvPath, err)
-	}
-
-	if runtime.GOOS == "windows" {
-		// https://github.com/pypa/virtualenv/commit/993ba1316a83b760370f5a3872b3f5ef4dd904c1
-		opts.BinPath = filepath.Join(opts.EnvPath, "Scripts")
-		opts.PythonExe = filepath.Join(opts.BinPath, "python.exe")
-	} else {
-		opts.BinPath = filepath.Join(opts.EnvPath, "bin")
-		opts.PythonExe = filepath.Join(opts.BinPath, "python3")
-	}
-
-	_, err = os.Stat(opts.BinPath)
-	if err != nil {
-		return fmt.Errorf("cannot stat BinPath %s: %s", opts.BinPath, err)
-	}
-
-	_, err = os.Stat(opts.PythonExe)
-	if err != nil {
-		return fmt.Errorf("cannot stat PythonExe %s: %s", opts.PythonExe, err)
-	}
-
-	if !opts.skipVersionCheck {
-		cmd := exec.Command(opts.PythonExe, "--version")
-		out, err := cmd.CombinedOutput()
-		if err != nil {
-			return fmt.Errorf("Failed to run %s --version: %s", opts.PythonExe, err)
-		}
-		outString := string(out)
-		expectVersion := "Python " + opts.PythonVersion
-		if !strings.HasPrefix(outString, expectVersion) {
-			return fmt.Errorf("Unexpected output from %s --version: %v (expected %v)", opts.PythonExe, outString, expectVersion)
-		}
-	}
-
-	return nil
-}
-
-func RequireActivatedPythonEnv(t *testing.T, ctx context.Context, opts *VenvOpts) {
-	err := CreatePythonEnv(opts)
 	require.NoError(t, err)
-	require.DirExists(t, opts.BinPath)
+	require.Contains(t, pythonExe, venvName)
 
-	newPath := fmt.Sprintf("%s%c%s", opts.BinPath, os.PathListSeparator, os.Getenv("PATH"))
+	if checkVersion {
-	t.Setenv("PATH", newPath)
+		actualVersion := testutil.CaptureCommandOutput(t, pythonExe, "--version")
+		expectVersion := "Python " + pythonVersion
+		require.True(t, strings.HasPrefix(actualVersion, expectVersion), "Running %s --version: Expected %v, got %v", pythonExe, expectVersion, actualVersion)
+	}
+
+	return tmpDir
 }

libs/python/pythontest/pythontest_test.go

@@ -2,42 +2,15 @@ package pythontest
 
 import (
 	"context"
-	"os/exec"
-	"path/filepath"
 	"testing"
-
-	"github.com/databricks/cli/libs/python"
-	"github.com/stretchr/testify/require"
 )
 
-func TestVenvSuccess(t *testing.T) {
+func TestVenv(t *testing.T) {
 	// Test at least two version to ensure we capture a case where venv version does not match system one
 	for _, pythonVersion := range []string{"3.11", "3.12"} {
 		t.Run(pythonVersion, func(t *testing.T) {
 			ctx := context.Background()
-			dir := t.TempDir()
+			RequirePythonVENV(t, ctx, pythonVersion, true)
-			opts := VenvOpts{
-				PythonVersion: pythonVersion,
-				Dir:           dir,
-			}
-			RequireActivatedPythonEnv(t, ctx, &opts)
-			require.DirExists(t, opts.EnvPath)
-			require.DirExists(t, opts.BinPath)
-			require.FileExists(t, opts.PythonExe)
-
-			pythonExe, err := exec.LookPath(python.GetExecutable())
-			require.NoError(t, err)
-			require.Equal(t, filepath.Dir(pythonExe), filepath.Dir(opts.PythonExe))
-			require.FileExists(t, pythonExe)
 		})
 	}
 }
-
-func TestWrongVersion(t *testing.T) {
-	require.Error(t, CreatePythonEnv(&VenvOpts{PythonVersion: "4.0"}))
-}
-
-func TestMissingVersion(t *testing.T) {
-	require.Error(t, CreatePythonEnv(nil))
-	require.Error(t, CreatePythonEnv(&VenvOpts{}))
-}