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package python

import (

"fmt"

"os"

"os/exec"

"path/filepath"

"runtime"

"strings"

"github.com/daidokoro/go-embed-python/embed_util"

"github.com/daidokoro/go-embed-python/python/internal/data"

)

type EmbeddedPython struct {

e *embed_util.EmbeddedFiles

pythonPath []string

}

// NewEmbeddedPython creates a new EmbeddedPython instance. The embedded source code and python binaries are

// extracted on demand using the given name as the base for the temporary directory. You should ensure that the chosen

// name does collide with other consumers of this library.

func NewEmbeddedPython(name string) (*EmbeddedPython, error) {

e, err := embed_util.NewEmbeddedFiles(data.Data, fmt.Sprintf("python-%s", name))

if err != nil {

return nil, err

}

return &EmbeddedPython{

e: e,

}, nil

}

func NewEmbeddedPythonWithTmpDir(tmpDir string, withHashInDir bool) (*EmbeddedPython, error) {

e, err := embed_util.NewEmbeddedFilesWithTmpDir(data.Data, tmpDir, withHashInDir)

if err != nil {

return nil, err

}

return &EmbeddedPython{

e: e,

}, nil

}

func (ep *EmbeddedPython) Cleanup() error {

return ep.e.Cleanup()

}

func (ep *EmbeddedPython) GetExtractedPath() string {

return ep.e.GetExtractedPath()

}

func (ep *EmbeddedPython) GetBinPath() string {

if runtime.GOOS == "windows" {

return ep.GetExtractedPath()

} else {

return filepath.Join(ep.GetExtractedPath(), "bin")

}

}

func (ep *EmbeddedPython) GetExePath() string {

suffix := ""

if runtime.GOOS == "windows" {

suffix = ".exe"

} else {

suffix = "3"

}

return filepath.Join(ep.GetBinPath(), "python"+suffix)

}

func (ep *EmbeddedPython) AddPythonPath(p string) {

ep.pythonPath = append(ep.pythonPath, p)

}

func (ep *EmbeddedPython) PythonCmd(args ...string) *exec.Cmd {

return ep.PythonCmd2(args)

}

func (ep *EmbeddedPython) PythonCmd2(args []string) *exec.Cmd {

exePath := ep.GetExePath()

cmd := exec.Command(exePath, args...)

cmd.Env = os.Environ()

cmd.Env = append(cmd.Env, fmt.Sprintf("PYTHONHOME=%s", ep.GetExtractedPath()))

if len(ep.pythonPath) != 0 {

pythonPathEnv := fmt.Sprintf("PYTHONPATH=%s", strings.Join(ep.pythonPath, string(os.PathListSeparator)))

cmd.Env = append(cmd.Env, pythonPathEnv)

}

return cmd

}