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* _ to unused func options * rm useless brakets * rm trifial non used models functions * rm dead code * rm dead global vars * fix routers/api/v1/repo/issue.go * dont overload import module
203 lines
5.2 KiB
Go
203 lines
5.2 KiB
Go
// Copyright 2014 The Gogs Authors. All rights reserved.
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package process
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"os/exec"
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"sort"
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"sync"
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"time"
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)
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// TODO: This packages still uses a singleton for the Manager.
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// Once there's a decent web framework and dependencies are passed around like they should,
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// then we delete the singleton.
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var (
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manager *Manager
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managerInit sync.Once
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// DefaultContext is the default context to run processing commands in
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DefaultContext = context.Background()
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)
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// Process represents a working process inheriting from Gitea.
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type Process struct {
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PID int64 // Process ID, not system one.
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Description string
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Start time.Time
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Cancel context.CancelFunc
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}
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// Manager knows about all processes and counts PIDs.
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type Manager struct {
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mutex sync.Mutex
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counter int64
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processes map[int64]*Process
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}
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// GetManager returns a Manager and initializes one as singleton if there's none yet
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func GetManager() *Manager {
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managerInit.Do(func() {
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manager = &Manager{
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processes: make(map[int64]*Process),
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}
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})
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return manager
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}
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// Add a process to the ProcessManager and returns its PID.
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func (pm *Manager) Add(description string, cancel context.CancelFunc) int64 {
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pm.mutex.Lock()
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pid := pm.counter + 1
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pm.processes[pid] = &Process{
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PID: pid,
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Description: description,
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Start: time.Now(),
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Cancel: cancel,
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}
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pm.counter = pid
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pm.mutex.Unlock()
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return pid
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}
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// Remove a process from the ProcessManager.
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func (pm *Manager) Remove(pid int64) {
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pm.mutex.Lock()
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delete(pm.processes, pid)
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pm.mutex.Unlock()
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}
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// Cancel a process in the ProcessManager.
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func (pm *Manager) Cancel(pid int64) {
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pm.mutex.Lock()
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process, ok := pm.processes[pid]
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pm.mutex.Unlock()
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if ok {
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process.Cancel()
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}
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}
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// Processes gets the processes in a thread safe manner
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func (pm *Manager) Processes() []*Process {
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pm.mutex.Lock()
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processes := make([]*Process, 0, len(pm.processes))
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for _, process := range pm.processes {
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processes = append(processes, process)
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}
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pm.mutex.Unlock()
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sort.Sort(processList(processes))
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return processes
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}
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// Exec a command and use the default timeout.
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func (pm *Manager) Exec(desc, cmdName string, args ...string) (string, string, error) {
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return pm.ExecDir(-1, "", desc, cmdName, args...)
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}
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// ExecTimeout a command and use a specific timeout duration.
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func (pm *Manager) ExecTimeout(timeout time.Duration, desc, cmdName string, args ...string) (string, string, error) {
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return pm.ExecDir(timeout, "", desc, cmdName, args...)
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}
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// ExecDir a command and use the default timeout.
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func (pm *Manager) ExecDir(timeout time.Duration, dir, desc, cmdName string, args ...string) (string, string, error) {
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return pm.ExecDirEnv(timeout, dir, desc, nil, cmdName, args...)
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}
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// ExecDirEnv runs a command in given path and environment variables, and waits for its completion
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// up to the given timeout (or DefaultTimeout if -1 is given).
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// Returns its complete stdout and stderr
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// outputs and an error, if any (including timeout)
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func (pm *Manager) ExecDirEnv(timeout time.Duration, dir, desc string, env []string, cmdName string, args ...string) (string, string, error) {
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return pm.ExecDirEnvStdIn(timeout, dir, desc, env, nil, cmdName, args...)
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}
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// ExecDirEnvStdIn runs a command in given path and environment variables with provided stdIN, and waits for its completion
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// up to the given timeout (or DefaultTimeout if -1 is given).
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// Returns its complete stdout and stderr
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// outputs and an error, if any (including timeout)
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func (pm *Manager) ExecDirEnvStdIn(timeout time.Duration, dir, desc string, env []string, stdIn io.Reader, cmdName string, args ...string) (string, string, error) {
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if timeout == -1 {
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timeout = 60 * time.Second
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}
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stdOut := new(bytes.Buffer)
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stdErr := new(bytes.Buffer)
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ctx, cancel := context.WithTimeout(DefaultContext, timeout)
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defer cancel()
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cmd := exec.CommandContext(ctx, cmdName, args...)
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cmd.Dir = dir
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cmd.Env = env
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cmd.Stdout = stdOut
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cmd.Stderr = stdErr
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if stdIn != nil {
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cmd.Stdin = stdIn
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}
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if err := cmd.Start(); err != nil {
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return "", "", err
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}
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pid := pm.Add(desc, cancel)
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err := cmd.Wait()
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pm.Remove(pid)
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if err != nil {
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err = &Error{
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PID: pid,
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Description: desc,
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Err: err,
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CtxErr: ctx.Err(),
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Stdout: stdOut.String(),
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Stderr: stdErr.String(),
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}
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}
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return stdOut.String(), stdErr.String(), err
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}
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type processList []*Process
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func (l processList) Len() int {
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return len(l)
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}
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func (l processList) Less(i, j int) bool {
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return l[i].PID < l[j].PID
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}
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func (l processList) Swap(i, j int) {
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l[i], l[j] = l[j], l[i]
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}
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// Error is a wrapped error describing the error results of Process Execution
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type Error struct {
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PID int64
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Description string
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Err error
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CtxErr error
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Stdout string
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Stderr string
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}
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func (err *Error) Error() string {
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return fmt.Sprintf("exec(%d:%s) failed: %v(%v) stdout: %s stderr: %s", err.PID, err.Description, err.Err, err.CtxErr, err.Stdout, err.Stderr)
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}
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// Unwrap implements the unwrappable implicit interface for go1.13 Unwrap()
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func (err *Error) Unwrap() error {
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return err.Err
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}
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