databricks-cli/libs/python/detect.go

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package python
import (
"context"
"errors"
"os/exec"
)
func DetectExecutable(ctx context.Context) (string, error) {
// TODO: add a shortcut if .python-version file is detected somewhere in
// the parent directory tree.
//
// See https://github.com/pyenv/pyenv#understanding-python-version-selection
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)
if err != nil {
return "", err
}
interpreter, err := all.AtLeast("3.8")
if err != nil {
return "", err
}
return interpreter.Path, nil
}