mirror of
https://github.com/go-gitea/gitea
synced 2024-12-25 09:15:03 +01:00
f4d12f8d97
* Use exec.CommandContext to simplfy timeout handling And fixing the data races which can be identified by the added tests when -race enabled. * Use sleep commmand instead of reading from stdin * Make the error handling go-esque
143 lines
3.7 KiB
Go
143 lines
3.7 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
|
|
// Use of this source code is governed by a MIT-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package process
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"errors"
|
|
"fmt"
|
|
"os/exec"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
// TODO: This packages still uses a singleton for the Manager.
|
|
// Once there's a decent web framework and dependencies are passed around like they should,
|
|
// then we delete the singleton.
|
|
|
|
var (
|
|
// ErrExecTimeout represent a timeout error
|
|
ErrExecTimeout = errors.New("Process execution timeout")
|
|
manager *Manager
|
|
)
|
|
|
|
// Process represents a working process inherit from Gogs.
|
|
type Process struct {
|
|
PID int64 // Process ID, not system one.
|
|
Description string
|
|
Start time.Time
|
|
Cmd *exec.Cmd
|
|
}
|
|
|
|
// Manager knows about all processes and counts PIDs.
|
|
type Manager struct {
|
|
mutex sync.Mutex
|
|
|
|
counter int64
|
|
Processes map[int64]*Process
|
|
}
|
|
|
|
// GetManager returns a Manager and initializes one as singleton if there's none yet
|
|
func GetManager() *Manager {
|
|
if manager == nil {
|
|
manager = &Manager{
|
|
Processes: make(map[int64]*Process),
|
|
}
|
|
}
|
|
return manager
|
|
}
|
|
|
|
// Add a process to the ProcessManager and returns its PID.
|
|
func (pm *Manager) Add(description string, cmd *exec.Cmd) int64 {
|
|
pm.mutex.Lock()
|
|
pid := pm.counter + 1
|
|
pm.Processes[pid] = &Process{
|
|
PID: pid,
|
|
Description: description,
|
|
Start: time.Now(),
|
|
Cmd: cmd,
|
|
}
|
|
pm.counter = pid
|
|
pm.mutex.Unlock()
|
|
|
|
return pid
|
|
}
|
|
|
|
// Remove a process from the ProcessManager.
|
|
func (pm *Manager) Remove(pid int64) {
|
|
pm.mutex.Lock()
|
|
delete(pm.Processes, pid)
|
|
pm.mutex.Unlock()
|
|
}
|
|
|
|
// Exec a command and use the default timeout.
|
|
func (pm *Manager) Exec(desc, cmdName string, args ...string) (string, string, error) {
|
|
return pm.ExecDir(-1, "", desc, cmdName, args...)
|
|
}
|
|
|
|
// ExecTimeout a command and use a specific timeout duration.
|
|
func (pm *Manager) ExecTimeout(timeout time.Duration, desc, cmdName string, args ...string) (string, string, error) {
|
|
return pm.ExecDir(timeout, "", desc, cmdName, args...)
|
|
}
|
|
|
|
// ExecDir a command and use the default timeout.
|
|
func (pm *Manager) ExecDir(timeout time.Duration, dir, desc, cmdName string, args ...string) (string, string, error) {
|
|
return pm.ExecDirEnv(timeout, dir, desc, nil, cmdName, args...)
|
|
}
|
|
|
|
// ExecDirEnv runs a command in given path and environment variables, and waits for its completion
|
|
// up to the given timeout (or DefaultTimeout if -1 is given).
|
|
// Returns its complete stdout and stderr
|
|
// outputs and an error, if any (including timeout)
|
|
func (pm *Manager) ExecDirEnv(timeout time.Duration, dir, desc string, env []string, cmdName string, args ...string) (string, string, error) {
|
|
if timeout == -1 {
|
|
timeout = 60 * time.Second
|
|
}
|
|
|
|
stdOut := new(bytes.Buffer)
|
|
stdErr := new(bytes.Buffer)
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), timeout)
|
|
defer cancel()
|
|
|
|
cmd := exec.CommandContext(ctx, cmdName, args...)
|
|
cmd.Dir = dir
|
|
cmd.Env = env
|
|
cmd.Stdout = stdOut
|
|
cmd.Stderr = stdErr
|
|
if err := cmd.Start(); err != nil {
|
|
return "", "", err
|
|
}
|
|
|
|
pid := pm.Add(desc, cmd)
|
|
err := cmd.Wait()
|
|
pm.Remove(pid)
|
|
|
|
if err != nil {
|
|
err = fmt.Errorf("exec(%d:%s) failed: %v(%v) stdout: %v stderr: %v", pid, desc, err, ctx.Err(), stdOut, stdErr)
|
|
}
|
|
|
|
return stdOut.String(), stdErr.String(), err
|
|
}
|
|
|
|
// Kill and remove a process from list.
|
|
func (pm *Manager) Kill(pid int64) error {
|
|
if proc, exists := pm.Processes[pid]; exists {
|
|
pm.mutex.Lock()
|
|
if proc.Cmd != nil &&
|
|
proc.Cmd.Process != nil &&
|
|
proc.Cmd.ProcessState != nil &&
|
|
!proc.Cmd.ProcessState.Exited() {
|
|
if err := proc.Cmd.Process.Kill(); err != nil {
|
|
return fmt.Errorf("failed to kill process(%d/%s): %v", pid, proc.Description, err)
|
|
}
|
|
}
|
|
delete(pm.Processes, pid)
|
|
pm.mutex.Unlock()
|
|
}
|
|
|
|
return nil
|
|
}
|