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misc/dashboard/builder: various cleanups 

* allow commit watcher to be disabled, useful for small slow builders who will never be the first to notice a commit.
* builders always update their local master working copy before cloning a specific revision.
* refactor hg repo operations into a new type, Repo.

R=adg, shanemhansen, luitvd
CC=golang-dev
https://golang.org/cl/7326053
This commit is contained in:
Dave Cheney 2013-02-21 13:11:58 +11:00
parent 8473b4487c
commit 4036d876ea
2 changed files with 214 additions and 193 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

259
misc/dashboard/builder/main.go
View File

@ -6,7 +6,6 @@ package main
import (
"bytes"
"encoding/xml"
"flag"
"fmt"
"io"
@ -16,9 +15,7 @@ import (
"path/filepath"
"regexp"
"runtime"
"strconv"
"strings"
"sync"
"time"
)
@ -43,6 +40,7 @@ var extraEnv = []string{
}
type Builder struct {
goroot *Repo
name string
goos, goarch string
key string
@ -58,19 +56,10 @@ var (
parallel = flag.Bool("parallel", false, "Build multiple targets in parallel")
buildTimeout = flag.Duration("buildTimeout", 60*time.Minute, "Maximum time to wait for builds and tests")
cmdTimeout = flag.Duration("cmdTimeout", 5*time.Minute, "Maximum time to wait for an external command")
commitInterval = flag.Duration("commitInterval", 1*time.Minute, "Time to wait between polling for new commits")
commitInterval = flag.Duration("commitInterval", 1*time.Minute, "Time to wait between polling for new commits (0 disables commit poller)")
verbose = flag.Bool("v", false, "verbose")
)
// Use a mutex to prevent the commit poller and builders from using the primary
// local goroot simultaneously. Theoretically, Mercurial locks the repo when
// it's in use. Practically, it does a bad job of this.
// As a rule, only hold this lock while calling run or runLog.
var (
goroot string
gorootMu sync.Mutex
)
var (
binaryTagRe = regexp.MustCompile(`^(release\.r|weekly\.)[0-9\-.]+`)
releaseRe = regexp.MustCompile(`^release\.r[0-9\-.]+`)
@ -89,10 +78,31 @@ func main() {
if len(flag.Args()) == 0 {
flag.Usage()
}
goroot = filepath.Join(*buildroot, "goroot")
goroot := &Repo{
Path: filepath.Join(*buildroot, "goroot"),
}
// set up work environment, use existing enviroment if possible
if goroot.Exists() {
log.Print("Found old workspace, will use it")
} else {
if err := os.RemoveAll(*buildroot); err != nil {
log.Fatalf("Error removing build root (%s): %s", *buildroot, err)
}
if err := os.Mkdir(*buildroot, mkdirPerm); err != nil {
log.Fatalf("Error making build root (%s): %s", *buildroot, err)
}
var err error
goroot, err = RemoteRepo(hgUrl).Clone(goroot.Path, "tip")
if err != nil {
log.Fatal("Error cloning repository:", err)
}
}
// set up builders
builders := make([]*Builder, len(flag.Args()))
for i, builder := range flag.Args() {
b, err := NewBuilder(builder)
for i, name := range flag.Args() {
b, err := NewBuilder(goroot, name)
if err != nil {
log.Fatal(err)
}
@ -104,24 +114,9 @@ func main() {
return
}
// set up work environment, use existing enviroment if possible
if hgRepoExists(goroot) {
log.Print("Found old workspace, will use it")
} else {
if err := os.RemoveAll(*buildroot); err != nil {
log.Fatalf("Error removing build root (%s): %s", *buildroot, err)
}
if err := os.Mkdir(*buildroot, mkdirPerm); err != nil {
log.Fatalf("Error making build root (%s): %s", *buildroot, err)
}
if err := hgClone(hgUrl, goroot); err != nil {
log.Fatal("Error cloning repository:", err)
}
}
// if specified, build revision and return
if *buildRevision != "" {
hash, err := fullHash(goroot, *buildRevision)
hash, err := goroot.FullHash(*buildRevision)
if err != nil {
log.Fatal("Error finding revision: ", err)
}
@ -133,15 +128,10 @@ func main() {
return
}
// Start commit watcher, and exit if that's all we're doing.
if len(flag.Args()) == 0 {
log.Print("no build targets specified; watching commits only")
commitWatcher()
return
}
go commitWatcher()
// Start commit watcher
go commitWatcher(goroot)
// go continuous build mode (default)
// go continuous build mode
// check for new commits and build them
for {
built := false
@ -188,15 +178,18 @@ func failMode(builders []*Builder) {
}
}
func NewBuilder(builder string) (*Builder, error) {
b := &Builder{name: builder}
func NewBuilder(goroot *Repo, name string) (*Builder, error) {
b := &Builder{
goroot: goroot,
name: name,
}
// get goos/goarch from builder string
s := strings.SplitN(builder, "-", 3)
s := strings.SplitN(b.name, "-", 3)
if len(s) >= 2 {
b.goos, b.goarch = s[0], s[1]
} else {
return nil, fmt.Errorf("unsupported builder form: %s", builder)
return nil, fmt.Errorf("unsupported builder form: %s", name)
}
// read keys from keyfile
@ -231,20 +224,7 @@ func (b *Builder) build() bool {
return false
}
// Look for hash locally before running hg pull.
if _, err := fullHash(goroot, hash[:12]); err != nil {
// Don't have hash, so run hg pull.
gorootMu.Lock()
err = run(*cmdTimeout, nil, goroot, hgCmd("pull")...)
gorootMu.Unlock()
if err != nil {
log.Println("hg pull failed:", err)
return false
}
}
err = b.buildHash(hash)
if err != nil {
if err := b.buildHash(hash); err != nil {
log.Println(err)
}
return true
@ -260,13 +240,13 @@ func (b *Builder) buildHash(hash string) error {
}
defer os.RemoveAll(workpath)
// clone repo
if err := hgClone(goroot, filepath.Join(workpath, "go")); err != nil {
// pull before cloning to ensure we have the revision
if err := b.goroot.Pull(); err != nil {
return err
}
// update to specified revision
if err := run(*cmdTimeout, nil, filepath.Join(workpath, "go"), hgCmd("update", hash)...); err != nil {
// clone repo at specified revision
if _, err := b.goroot.Clone(filepath.Join(workpath, "go"), hash); err != nil {
return err
}
@ -397,8 +377,8 @@ func (b *Builder) buildSubrepo(goRoot, goPath, pkg, hash string) (string, error)
}
// hg update to the specified hash
pkgPath := filepath.Join(goPath, "src", pkg)
if err := run(*cmdTimeout, nil, pkgPath, hgCmd("update", hash)...); err != nil {
repo := Repo{Path: filepath.Join(goPath, "src", pkg)}
if err := repo.UpdateTo(hash); err != nil {
return "", err
}
@ -478,9 +458,13 @@ func isFile(name string) bool {
}
// commitWatcher polls hg for new commits and tells the dashboard about them.
func commitWatcher() {
func commitWatcher(goroot *Repo) {
if *commitInterval == 0 {
log.Printf("commitInterval is %s, disabling commitWatcher", *commitInterval)
return
}
// Create builder just to get master key.
b, err := NewBuilder("mercurial-commit")
b, err := NewBuilder(goroot, "mercurial-commit")
if err != nil {
log.Fatal(err)
}
@ -491,10 +475,13 @@ func commitWatcher() {
log.Printf("poll...")
}
// Main Go repository.
commitPoll(key, "")
commitPoll(goroot, "", key)
// Go sub-repositories.
for _, pkg := range dashboardPackages("subrepo") {
commitPoll(key, pkg)
pkgroot := &Repo{
Path: filepath.Join(*buildroot, pkg),
}
commitPoll(pkgroot, pkg, key)
}
if *verbose {
log.Printf("sleep...")
@ -503,112 +490,31 @@ func commitWatcher() {
}
}
func hgClone(url, path string) error {
if url == goroot {
gorootMu.Lock()
defer gorootMu.Unlock()
}
return run(*cmdTimeout, nil, *buildroot, hgCmd("clone", url, path)...)
}
func hgRepoExists(path string) bool {
fi, err := os.Stat(filepath.Join(path, ".hg"))
if err != nil {
return false
}
return fi.IsDir()
}
// HgLog represents a single Mercurial revision.
type HgLog struct {
Hash string
Author string
Date string
Desc string
Parent string
// Internal metadata
added bool
}
// logByHash is a cache of all Mercurial revisions we know about,
// indexed by full hash.
var logByHash = map[string]*HgLog{}
// xmlLogTemplate is a template to pass to Mercurial to make
// hg log print the log in valid XML for parsing with xml.Unmarshal.
const xmlLogTemplate = `
<Log>
<Hash>{node|escape}</Hash>
<Parent>{parent|escape}</Parent>
<Author>{author|escape}</Author>
<Date>{date|rfc3339date}</Date>
<Desc>{desc|escape}</Desc>
</Log>
`
// commitPoll pulls any new revisions from the hg server
// and tells the server about them.
func commitPoll(key, pkg string) {
pkgRoot := goroot
if pkg != "" {
pkgRoot = filepath.Join(*buildroot, pkg)
if !hgRepoExists(pkgRoot) {
if err := hgClone(repoURL(pkg), pkgRoot); err != nil {
log.Printf("%s: hg clone failed: %v", pkg, err)
if err := os.RemoveAll(pkgRoot); err != nil {
log.Printf("%s: %v", pkg, err)
}
return
func commitPoll(repo *Repo, pkg, key string) {
if !repo.Exists() {
var err error
repo, err = RemoteRepo(repoURL(pkg)).Clone(repo.Path, "tip")
if err != nil {
log.Printf("%s: hg clone failed: %v", pkg, err)
if err := os.RemoveAll(repo.Path); err != nil {
log.Printf("%s: %v", pkg, err)
}
}
}
lockGoroot := func() {
if pkgRoot == goroot {
gorootMu.Lock()
}
}
unlockGoroot := func() {
if pkgRoot == goroot {
gorootMu.Unlock()
}
}
lockGoroot()
err := run(*cmdTimeout, nil, pkgRoot, hgCmd("pull")...)
unlockGoroot()
if err != nil {
log.Printf("hg pull: %v", err)
return
}
const N = 50 // how many revisions to grab
lockGoroot()
data, _, err := runLog(*cmdTimeout, nil, pkgRoot, hgCmd("log",
"--encoding=utf-8",
"--limit="+strconv.Itoa(N),
"--template="+xmlLogTemplate)...,
)
unlockGoroot()
logs, err := repo.Log() // repo.Log calls repo.Pull internally
if err != nil {
log.Printf("hg log: %v", err)
return
}
var logStruct struct {
Log []HgLog
}
err = xml.Unmarshal([]byte("<Top>"+data+"</Top>"), &logStruct)
if err != nil {
log.Printf("unmarshal hg log: %v", err)
return
}
logs := logStruct.Log
// Pass 1. Fill in parents and add new log entries to logsByHash.
// Empty parent means take parent from next log entry.
// Non-empty parent has form 1234:hashhashhash; we want full hash.
@ -617,7 +523,7 @@ func commitPoll(key, pkg string) {
if l.Parent == "" && i+1 < len(logs) {
l.Parent = logs[i+1].Hash
} else if l.Parent != "" {
l.Parent, _ = fullHash(pkgRoot, l.Parent)
l.Parent, _ = repo.FullHash(l.Parent)
}
if *verbose {
log.Printf("hg log %s: %s < %s\n", pkg, l.Hash, l.Parent)
@ -629,8 +535,7 @@ func commitPoll(key, pkg string) {
}
}
for i := range logs {
l := &logs[i]
for _, l := range logs {
addCommit(pkg, l.Hash, key)
}
}
@ -674,34 +579,6 @@ func addCommit(pkg, hash, key string) bool {
return true
}
// fullHash returns the full hash for the given Mercurial revision.
func fullHash(root, rev string) (string, error) {
if root == goroot {
gorootMu.Lock()
}
s, _, err := runLog(*cmdTimeout, nil, root,
hgCmd("log",
"--encoding=utf-8",
"--rev="+rev,
"--limit=1",
"--template={node}")...,
)
if root == goroot {
gorootMu.Unlock()
}
if err != nil {
return "", nil
}
s = strings.TrimSpace(s)
if s == "" {
return "", fmt.Errorf("cannot find revision")
}
if len(s) != 40 {
return "", fmt.Errorf("hg returned invalid hash " + s)
}
return s, nil
}
var repoRe = regexp.MustCompile(`^code\.google\.com/p/([a-z0-9\-]+(\.[a-z0-9\-]+)?)(/[a-z0-9A-Z_.\-/]+)?$`)
// repoURL returns the repository URL for the supplied import path.
@ -749,7 +626,3 @@ func getenvOk(k string) (v string, ok bool) {
}
return "", false
}
func hgCmd(args ...string) []string {
return append([]string{"hg", "--config", "extensions.codereview=!"}, args...)
}

148
misc/dashboard/builder/vcs.go Normal file
View File

@ -0,0 +1,148 @@
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"encoding/xml"
"fmt"
"log"
"os"
"path/filepath"
"strconv"
"strings"
"sync"
)
// Repo represents a mercurial repository.
type Repo struct {
Path string
sync.Mutex
}
// RemoteRepo constructs a *Repo representing a remote repository.
func RemoteRepo(url string) *Repo {
return &Repo{
Path: url,
}
}
// Clone clones the current Repo to a new destination
// returning a new *Repo if successful.
func (r *Repo) Clone(path, rev string) (*Repo, error) {
r.Lock()
defer r.Unlock()
if err := run(*cmdTimeout, nil, *buildroot, r.hgCmd("clone", "-r", rev, r.Path, path)...); err != nil {
return nil, err
}
return &Repo{
Path: path,
}, nil
}
// UpdateTo updates the working copy of this Repo to the
// supplied revision.
func (r *Repo) UpdateTo(hash string) error {
r.Lock()
defer r.Unlock()
return run(*cmdTimeout, nil, r.Path, r.hgCmd("update", hash)...)
}
// Exists reports whether this Repo represents a valid Mecurial repository.
func (r *Repo) Exists() bool {
fi, err := os.Stat(filepath.Join(r.Path, ".hg"))
if err != nil {
return false
}
return fi.IsDir()
}
// Pull pulls changes from the default path, that is, the path
// this Repo was cloned from.
func (r *Repo) Pull() error {
r.Lock()
defer r.Unlock()
return run(*cmdTimeout, nil, r.Path, r.hgCmd("pull")...)
}
// Log returns the changelog for this repository.
func (r *Repo) Log() ([]HgLog, error) {
if err := r.Pull(); err != nil {
return nil, err
}
const N = 50 // how many revisions to grab
r.Lock()
defer r.Unlock()
data, _, err := runLog(*cmdTimeout, nil, r.Path, r.hgCmd("log",
"--encoding=utf-8",
"--limit="+strconv.Itoa(N),
"--template="+xmlLogTemplate)...,
)
if err != nil {
return nil, err
}
var logStruct struct {
Log []HgLog
}
err = xml.Unmarshal([]byte("<Top>"+data+"</Top>"), &logStruct)
if err != nil {
log.Printf("unmarshal hg log: %v", err)
return nil, err
}
return logStruct.Log, nil
}
// FullHash returns the full hash for the given Mercurial revision.
func (r *Repo) FullHash(rev string) (string, error) {
r.Lock()
defer r.Unlock()
s, _, err := runLog(*cmdTimeout, nil, r.Path,
r.hgCmd("log",
"--encoding=utf-8",
"--rev="+rev,
"--limit=1",
"--template={node}")...,
)
if err != nil {
return "", nil
}
s = strings.TrimSpace(s)
if s == "" {
return "", fmt.Errorf("cannot find revision")
}
if len(s) != 40 {
return "", fmt.Errorf("hg returned invalid hash " + s)
}
return s, nil
}
func (r *Repo) hgCmd(args ...string) []string {
return append([]string{"hg", "--config", "extensions.codereview=!"}, args...)
}
// HgLog represents a single Mercurial revision.
type HgLog struct {
Hash string
Author string
Date string
Desc string
Parent string
// Internal metadata
added bool
}
// xmlLogTemplate is a template to pass to Mercurial to make
// hg log print the log in valid XML for parsing with xml.Unmarshal.
const xmlLogTemplate = `
<Log>
<Hash>{node|escape}</Hash>
<Parent>{parent|escape}</Parent>
<Author>{author|escape}</Author>
<Date>{date|rfc3339date}</Date>
<Desc>{desc|escape}</Desc>
</Log>
`