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477package local_runtime
import (
"bytes"
"context"
"errors"
"fmt"
"os"
"os/exec"
"path"
"path/filepath"
"strconv"
"strings"
"sync"
"time"
routinepkg "github.com/langgenius/dify-plugin-daemon/pkg/routine"
"github.com/langgenius/dify-plugin-daemon/pkg/utils/log"
"github.com/langgenius/dify-plugin-daemon/pkg/utils/routine"
)
func (p *LocalPluginRuntime) prepareUV() (string, error) {
if p.uvPath != "" {
return p.uvPath, nil
}
// using `from uv._find_uv import find_uv_bin; print(find_uv_bin())` to find uv path
cmd := exec.Command(p.defaultPythonInterpreterPath, "-c", "from uv._find_uv import find_uv_bin; print(find_uv_bin())")
cmd.Dir = p.State.WorkingPath
output, err := cmd.Output()
if err != nil {
return "", fmt.Errorf("failed to find uv path: %w", err)
}
return strings.TrimSpace(string(output)), nil
}
func (p *LocalPluginRuntime) preparePipArgs() []string {
args := []string{"install"}
if p.appConfig.PipMirrorUrl != "" {
args = append(args, "-i", p.appConfig.PipMirrorUrl)
}
args = append(args, "-r", "requirements.txt")
if p.appConfig.PipVerbose {
args = append(args, "-vvv")
}
if p.appConfig.PipExtraArgs != "" {
extraArgs := strings.Split(p.appConfig.PipExtraArgs, " ")
args = append(args, extraArgs...)
}
args = append([]string{"pip"}, args...)
return args
}
func (p *LocalPluginRuntime) prepareSyncArgs() []string {
args := []string{"sync", "--no-dev"}
if p.appConfig.PipMirrorUrl != "" {
args = append(args, "-i", p.appConfig.PipMirrorUrl)
}
if p.appConfig.PipVerbose {
args = append(args, "-v")
}
if p.appConfig.PipExtraArgs != "" {
extraArgs := strings.Split(p.appConfig.PipExtraArgs, " ")
args = append(args, extraArgs...)
}
return args
}
func (p *LocalPluginRuntime) detectDependencyFileType() (PythonDependencyFileType, error) {
pyprojectPath := path.Join(p.State.WorkingPath, string(pyprojectTomlFile))
requirementsPath := path.Join(p.State.WorkingPath, string(requirementsTxtFile))
if _, err := os.Stat(pyprojectPath); err == nil {
return pyprojectTomlFile, nil
}
if _, err := os.Stat(requirementsPath); err == nil {
return requirementsTxtFile, nil
}
return "", fmt.Errorf("neither %s nor %s found in plugin directory", pyprojectTomlFile, requirementsTxtFile)
}
func (p *LocalPluginRuntime) installDependencies(
uvPath string,
dependencyFileType PythonDependencyFileType,
) error {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
defer cancel()
var args []string
switch dependencyFileType {
case pyprojectTomlFile:
args = p.prepareSyncArgs()
log.Info("installing plugin dependencies", "plugin", p.Config.Identity(), "method", "uv sync", "file", pyprojectTomlFile)
case requirementsTxtFile:
args = p.preparePipArgs()
log.Info("installing plugin dependencies", "plugin", p.Config.Identity(), "method", "uv pip install", "file", requirementsTxtFile)
default:
return fmt.Errorf("unsupported dependency file type: %s", dependencyFileType)
}
virtualEnvPath := path.Join(p.State.WorkingPath, ".venv")
cmd := exec.CommandContext(ctx, uvPath, args...)
cmd.Env = append(cmd.Env, "VIRTUAL_ENV="+virtualEnvPath, "PATH="+os.Getenv("PATH"))
if p.appConfig.HttpProxy != "" {
cmd.Env = append(cmd.Env, fmt.Sprintf("HTTP_PROXY=%s", p.appConfig.HttpProxy))
}
if p.appConfig.HttpsProxy != "" {
cmd.Env = append(cmd.Env, fmt.Sprintf("HTTPS_PROXY=%s", p.appConfig.HttpsProxy))
}
if p.appConfig.NoProxy != "" {
cmd.Env = append(cmd.Env, fmt.Sprintf("NO_PROXY=%s", p.appConfig.NoProxy))
}
cmd.Dir = p.State.WorkingPath
// get stdout and stderr
stdout, err := cmd.StdoutPipe()
if err != nil {
return fmt.Errorf("failed to get stdout: %s", err)
}
defer stdout.Close()
stderr, err := cmd.StderrPipe()
if err != nil {
return fmt.Errorf("failed to get stderr: %s", err)
}
defer stderr.Close()
// start command
if err := cmd.Start(); err != nil {
return fmt.Errorf("failed to start command: %s", err)
}
defer func() {
if cmd.Process != nil {
cmd.Process.Kill()
}
}()
var errMsg strings.Builder
var wg sync.WaitGroup
wg.Add(2)
lastActiveAt := time.Now()
routine.Submit(routinepkg.Labels{
routinepkg.RoutineLabelKeyModule: "plugin_manager",
routinepkg.RoutineLabelKeyMethod: "InitPythonEnvironment",
}, func() {
defer wg.Done()
// read stdout
buf := make([]byte, 1024)
for {
n, err := stdout.Read(buf)
if err != nil {
break
}
// FIXME: move the log to separated layer
log.Info("installing plugin", "plugin", p.Config.Identity(), "output", string(buf[:n]))
lastActiveAt = time.Now()
}
})
routine.Submit(routinepkg.Labels{
routinepkg.RoutineLabelKeyModule: "plugin_manager",
routinepkg.RoutineLabelKeyMethod: "InitPythonEnvironment",
}, func() {
defer wg.Done()
// read stderr
buf := make([]byte, 1024)
for {
n, err := stderr.Read(buf)
if err != nil && err != os.ErrClosed {
lastActiveAt = time.Now()
errMsg.WriteString(string(buf[:n]))
break
} else if err == os.ErrClosed {
break
}
if n > 0 {
errMsg.WriteString(string(buf[:n]))
lastActiveAt = time.Now()
}
}
})
routine.Submit(routinepkg.Labels{
routinepkg.RoutineLabelKeyModule: "plugin_manager",
routinepkg.RoutineLabelKeyMethod: "InitPythonEnvironment",
}, func() {
ticker := time.NewTicker(5 * time.Second)
defer ticker.Stop()
for range ticker.C {
if cmd.ProcessState != nil && cmd.ProcessState.Exited() {
break
}
if time.Since(lastActiveAt) > time.Duration(
p.appConfig.PythonEnvInitTimeout,
)*time.Second {
cmd.Process.Kill()
errMsg.WriteString(fmt.Sprintf(
"init process exited due to no activity for %d seconds",
p.appConfig.PythonEnvInitTimeout,
))
break
}
}
})
wg.Wait()
if err := cmd.Wait(); err != nil {
return fmt.Errorf("failed to install dependencies: %s, output: %s", err, errMsg.String())
}
return nil
}
type PythonVirtualEnvironment struct {
pythonInterpreterPath string
}
var (
ErrVirtualEnvironmentNotFound = errors.New("virtual environment not found")
ErrVirtualEnvironmentInvalid = errors.New("virtual environment is invalid")
)
type PythonDependencyFileType string
const (
pyprojectTomlFile PythonDependencyFileType = "pyproject.toml"
requirementsTxtFile PythonDependencyFileType = "requirements.txt"
)
const (
envPath = ".venv"
envPythonPath = envPath + "/bin/python"
envValidFlagFile = envPath + "/dify/plugin.json"
)
func (p *LocalPluginRuntime) checkPythonVirtualEnvironment() (*PythonVirtualEnvironment, error) {
if _, err := os.Stat(path.Join(p.State.WorkingPath, envPath)); err != nil {
return nil, ErrVirtualEnvironmentNotFound
}
pythonPath, err := filepath.Abs(path.Join(p.State.WorkingPath, envPythonPath))
if err != nil {
return nil, fmt.Errorf("failed to find python: %s", err)
}
if _, err := os.Stat(pythonPath); err != nil {
return nil, fmt.Errorf("failed to find python: %s", err)
}
// check if dify/plugin.json exists
if _, err := os.Stat(path.Join(p.State.WorkingPath, envValidFlagFile)); err != nil {
return nil, ErrVirtualEnvironmentInvalid
}
return &PythonVirtualEnvironment{
pythonInterpreterPath: pythonPath,
}, nil
}
func (p *LocalPluginRuntime) deleteVirtualEnvironment() error {
// check if virtual environment exists
if _, err := os.Stat(path.Join(p.State.WorkingPath, envPath)); err != nil {
return nil
}
return os.RemoveAll(path.Join(p.State.WorkingPath, envPath))
}
func (p *LocalPluginRuntime) createVirtualEnvironment(
uvPath string,
) (*PythonVirtualEnvironment, error) {
cmd := exec.Command(uvPath, "venv", envPath, "--python", "3.12")
cmd.Dir = p.State.WorkingPath
b := bytes.NewBuffer(nil)
cmd.Stdout = b
cmd.Stderr = b
if err := cmd.Run(); err != nil {
return nil, fmt.Errorf("failed to create virtual environment: %s, output: %s", err, b.String())
}
pythonPath, err := filepath.Abs(path.Join(p.State.WorkingPath, envPythonPath))
if err != nil {
return nil, fmt.Errorf("failed to find python: %s", err)
}
if _, err := os.Stat(pythonPath); err != nil {
return nil, fmt.Errorf("failed to find python: %s", err)
}
// try find pyproject.toml or requirements.txt
dependencyFileType, err := p.detectDependencyFileType()
if err != nil {
return nil, fmt.Errorf("failed to find dependency file: %s", err)
}
log.Info("detected dependency file", "plugin", p.Config.Identity(), "file", dependencyFileType)
return &PythonVirtualEnvironment{
pythonInterpreterPath: pythonPath,
}, nil
}
func (p *LocalPluginRuntime) getRequirementsPath() string {
return path.Join(p.State.WorkingPath, string(requirementsTxtFile))
}
func (p *LocalPluginRuntime) getDependencyFilePath() (string, error) {
dependencyFileType, err := p.detectDependencyFileType()
if err != nil {
return "", err
}
return path.Join(p.State.WorkingPath, string(dependencyFileType)), nil
}
func (p *LocalPluginRuntime) markVirtualEnvironmentAsValid() error {
// pluginIdentityPath is a file that contains the timestamp of the virtual environment
// which is used to mark the virtual environment as valid (All dependencies were installed)
pluginJsonPath := path.Join(p.State.WorkingPath, envValidFlagFile)
if err := os.MkdirAll(path.Dir(pluginJsonPath), 0755); err != nil {
return fmt.Errorf("failed to create %s/dify directory: %s", envPath, err)
}
// write plugin.json
if err := os.WriteFile(
pluginJsonPath,
[]byte(`{"timestamp":`+strconv.FormatInt(time.Now().Unix(), 10)+`}`),
0644,
); err != nil {
return fmt.Errorf("failed to write plugin.json: %s", err)
}
return nil
}
func (p *LocalPluginRuntime) preCompile(
pythonPath string,
) error {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
defer cancel()
compileArgs := []string{"-m", "compileall"}
if p.appConfig.PythonCompileAllExtraArgs != "" {
compileArgs = append(compileArgs, strings.Split(p.appConfig.PythonCompileAllExtraArgs, " ")...)
}
compileArgs = append(compileArgs, ".")
// pre-compile the plugin to avoid costly compilation on first invocation
compileCmd := exec.CommandContext(ctx, pythonPath, compileArgs...)
compileCmd.Dir = p.State.WorkingPath
// get stdout and stderr
compileStdout, err := compileCmd.StdoutPipe()
if err != nil {
return fmt.Errorf("failed to get stdout: %s", err)
}
defer compileStdout.Close()
compileStderr, err := compileCmd.StderrPipe()
if err != nil {
return fmt.Errorf("failed to get stderr: %s", err)
}
defer compileStderr.Close()
// start command
if err := compileCmd.Start(); err != nil {
return fmt.Errorf("failed to start command: %s", err)
}
defer func() {
if compileCmd.Process != nil {
compileCmd.Process.Kill()
}
}()
var compileErrMsg strings.Builder
var compileWg sync.WaitGroup
compileWg.Add(2)
routine.Submit(routinepkg.Labels{
routinepkg.RoutineLabelKeyModule: "plugin_manager",
routinepkg.RoutineLabelKeyMethod: "InitPythonEnvironment",
}, func() {
defer compileWg.Done()
// read compileStdout
for {
buf := make([]byte, 102400)
n, err := compileStdout.Read(buf)
if err != nil {
break
}
// split to first line
lines := strings.Split(string(buf[:n]), "\n")
for len(lines) > 0 && len(lines[0]) == 0 {
lines = lines[1:]
}
if len(lines) > 0 {
if len(lines) > 1 {
log.Info("pre-compiling plugin", "plugin", p.Config.Identity(), "file", lines[0], "more", true)
} else {
log.Info("pre-compiling plugin", "plugin", p.Config.Identity(), "file", lines[0])
}
}
}
})
routine.Submit(routinepkg.Labels{
routinepkg.RoutineLabelKeyModule: "plugin_manager",
routinepkg.RoutineLabelKeyMethod: "InitPythonEnvironment",
}, func() {
defer compileWg.Done()
// read stderr
buf := make([]byte, 1024)
for {
n, err := compileStderr.Read(buf)
if err != nil {
break
}
compileErrMsg.WriteString(string(buf[:n]))
}
})
compileWg.Wait()
if err := compileCmd.Wait(); err != nil {
// skip the error if the plugin is not compiled
// ISSUE: for some weird reasons, plugins may reference to a broken sdk but it works well itself
// we need to skip it but log the messages
// https://github.com/langgenius/dify/issues/16292
log.Warn("failed to pre-compile the plugin", "error", compileErrMsg.String())
}
log.Info("pre-loaded the plugin", "plugin", p.Config.Identity())
// import dify_plugin to speedup the first launching
// ISSUE: it takes too long to setup all the deps, that's why we choose to preload it
importCmd := exec.CommandContext(ctx, pythonPath, "-c", "import dify_plugin")
importCmd.Dir = p.State.WorkingPath
importCmd.Output()
return nil
}
func (p *LocalPluginRuntime) getVirtualEnvironmentPythonPath() (string, error) {
// get the absolute path of the python interpreter
pythonPath, err := filepath.Abs(path.Join(p.State.WorkingPath, envPythonPath))
if err != nil {
return "", fmt.Errorf("failed to join python path: %s", err)
}
if _, err := os.Stat(pythonPath); err != nil {
return "", ErrVirtualEnvironmentNotFound
}
return pythonPath, nil
}