woodpecker/pkg/queue/queue.go
2014-02-16 11:45:15 +06:00

247 lines
6.6 KiB
Go

package queue
import (
"bytes"
"fmt"
bldr "github.com/drone/drone/pkg/build"
"github.com/drone/drone/pkg/build/git"
r "github.com/drone/drone/pkg/build/repo"
"github.com/drone/drone/pkg/build/script"
"github.com/drone/drone/pkg/channel"
"github.com/drone/drone/pkg/database"
. "github.com/drone/drone/pkg/model"
"github.com/drone/drone/pkg/plugin/notify"
"github.com/drone/go-github/github"
"log"
"path/filepath"
"time"
)
// queue that will store all build tasks until
// they are processed by a worker.
var queue = make(chan *BuildTask)
// work is a function that will infinitely
// run in the background waiting for tasks that
// it can pull off the queue and execute.
func work() {
var task *BuildTask
for {
// get work item (pointer) from the queue
task = <-queue
if task == nil {
continue
}
// execute the task
task.execute()
}
}
// Add adds the task to the build queue.
func Add(task *BuildTask) {
queue <- task
}
// BuildTasks represents a build that is pending
// execution.
type BuildTask struct {
Repo *Repo
Commit *Commit
Build *Build
// Build instructions from the .drone.yml
// file, unmarshalled.
Script *script.Build
}
// execute will execute the build task and persist
// the results to the datastore.
func (b *BuildTask) execute() error {
// we need to be sure that we can recover
// from any sort panic that could occur
// to avoid brining down the entire application
defer func() {
if e := recover(); e != nil {
b.Build.Finished = time.Now().UTC()
b.Commit.Finished = time.Now().UTC()
b.Build.Duration = b.Build.Finished.Unix() - b.Build.Started.Unix()
b.Commit.Duration = b.Build.Finished.Unix() - b.Build.Started.Unix()
b.Commit.Status = "Error"
b.Build.Status = "Error"
database.SaveBuild(b.Build)
database.SaveCommit(b.Commit)
}
}()
// update commit and build status
b.Commit.Status = "Started"
b.Build.Status = "Started"
b.Build.Started = time.Now().UTC()
b.Commit.Started = time.Now().UTC()
// persist the commit to the database
if err := database.SaveCommit(b.Commit); err != nil {
return err
}
// persist the build to the database
if err := database.SaveBuild(b.Build); err != nil {
return err
}
// get settings
settings, _ := database.GetSettings()
// notification context
context := &notify.Context{
Repo: b.Repo,
Commit: b.Commit,
Host: settings.URL().String(),
}
// send all "started" notifications
if b.Script.Notifications != nil {
b.Script.Notifications.Send(context)
}
// Send "started" notification to Github
if err := updateGitHubStatus(b.Repo, b.Commit); err != nil {
log.Printf("error updating github status: %s\n", err.Error())
}
// make sure a channel exists for the repository,
// the commit, and the commit output (TODO)
reposlug := fmt.Sprintf("%s/%s/%s", b.Repo.Host, b.Repo.Owner, b.Repo.Name)
commitslug := fmt.Sprintf("%s/%s/%s/commit/%s", b.Repo.Host, b.Repo.Owner, b.Repo.Name, b.Commit.Hash)
consoleslug := fmt.Sprintf("%s/%s/%s/commit/%s/builds/%s", b.Repo.Host, b.Repo.Owner, b.Repo.Name, b.Commit.Hash, b.Build.Slug)
channel.Create(reposlug)
channel.Create(commitslug)
channel.CreateStream(consoleslug)
// notify the channels that the commit and build started
channel.SendJSON(reposlug, b.Commit)
channel.SendJSON(commitslug, b.Build)
var buf = &bufferWrapper{channel: consoleslug}
// append private parameters to the environment
// variable section of the .drone.yml file
if b.Repo.Params != nil {
for k, v := range b.Repo.Params {
b.Script.Env = append(b.Script.Env, k+"="+v)
}
}
// execute the build
builder := bldr.Builder{}
builder.Build = b.Script
builder.Repo = &r.Repo{Path: b.Repo.URL, Branch: b.Commit.Branch, Commit: b.Commit.Hash, PR: b.Commit.PullRequest, Dir: filepath.Join("/var/cache/drone/src", b.Repo.Slug), Depth: git.GitDepth(b.Script.Git)}
builder.Key = []byte(b.Repo.PrivateKey)
builder.Stdout = buf
builder.Timeout = 300 * time.Minute
defer func() {
// update the status of the commit using the
// GitHub status API.
if err := updateGitHubStatus(b.Repo, b.Commit); err != nil {
log.Printf("error updating github status: %s\n", err.Error())
}
}()
buildErr := builder.Run()
b.Build.Finished = time.Now().UTC()
b.Commit.Finished = time.Now().UTC()
b.Build.Duration = b.Build.Finished.UnixNano() - b.Build.Started.UnixNano()
b.Commit.Duration = b.Build.Finished.UnixNano() - b.Build.Started.UnixNano()
b.Commit.Status = "Success"
b.Build.Status = "Success"
b.Build.Stdout = buf.buf.String()
// if exit code != 0 set to failure
if builder.BuildState == nil || builder.BuildState.ExitCode != 0 {
b.Commit.Status = "Failure"
b.Build.Status = "Failure"
if buildErr != nil && b.Build.Stdout == "" {
// TODO: If you wanted to have very friendly error messages, you could do that here
b.Build.Stdout = buildErr.Error() + "\n"
}
}
// persist the build to the database
if err := database.SaveBuild(b.Build); err != nil {
return err
}
// persist the commit to the database
if err := database.SaveCommit(b.Commit); err != nil {
return err
}
// notify the channels that the commit and build finished
channel.SendJSON(reposlug, b.Commit)
channel.SendJSON(commitslug, b.Build)
channel.Close(consoleslug)
// send all "finished" notifications
if b.Script.Notifications != nil {
b.Script.Notifications.Send(context)
}
return nil
}
// updateGitHubStatus is a helper function that will send
// the build status to GitHub using the Status API.
// see https://github.com/blog/1227-commit-status-api
func updateGitHubStatus(repo *Repo, commit *Commit) error {
// convert from drone status to github status
var message, status string
switch commit.Status {
case "Success":
status = "success"
message = "The build succeeded on drone.io"
case "Failure":
status = "failure"
message = "The build failed on drone.io"
case "Started":
status = "pending"
message = "The build is pending on drone.io"
default:
status = "error"
message = "The build errored on drone.io"
}
// get the system settings
settings, _ := database.GetSettings()
// get the user from the database
// since we need his / her GitHub token
user, err := database.GetUser(repo.UserID)
if err != nil {
return err
}
client := github.New(user.GithubToken)
client.ApiUrl = settings.GitHubApiUrl;
var url string
url = settings.URL().String() + "/" + repo.Slug + "/commit/" + commit.Hash
return client.Repos.CreateStatus(repo.Owner, repo.Name, status, url, message, commit.Hash)
}
type bufferWrapper struct {
buf bytes.Buffer
// name of the channel
channel string
}
func (b *bufferWrapper) Write(p []byte) (n int, err error) {
n, err = b.buf.Write(p)
channel.SendBytes(b.channel, p)
return
}