/
main.go
314 lines (282 loc) · 6.17 KB
/
main.go
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package main
import (
"flag"
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
"time"
yml "github.com/gonuts/yaml"
)
var g_config = flag.String("config", "config.yaml", "(YAML) file containing the list of slaves")
var g_parallel = flag.Bool("parallel", true, "run the build-slaves in parallel")
type Config struct {
Slaves []Slave
}
type Slave struct {
Addr string // slave SSH address
Name string // informative name of that slave
Path string // path under which all build files and artifacts are stored
}
func (s *Slave) LocalCommandFileName() string {
return filepath.Join(s.Name, "build.sh")
}
func (s *Slave) RemoteCommandFileName() string {
return filepath.Join(s.Path, "build.sh")
}
func (s *Slave) Ping() error {
var err error
ssh := exec.Command(
"ssh",
s.Addr,
"echo hello",
)
out, err := ssh.CombinedOutput()
if err != nil {
return fmt.Errorf(
"slave [%s] did not respond (%v: %s)",
s.Name, err, string(out),
)
}
return err
}
type BuildReport struct {
slave Slave
msg string
err error
}
type Builder struct {
slave Slave
w *os.File // logfile
}
func (b Builder) run() BuildReport {
fmt.Fprintf(b.w, "## build -- start [%v]\n", time.Now())
fname := b.slave.LocalCommandFileName()
f, err := os.Open(fname)
if err != nil {
log.Printf(
"no such file [%s] for slave [%s] (%v)\n",
fname, b.slave.Addr, err,
)
return BuildReport{
b.slave,
fmt.Sprintf("no such file [%s] (err=%v)", fname, err),
err,
}
}
defer f.Close()
{
ssh := exec.Command(
"ssh",
b.slave.Addr,
fmt.Sprintf("mkdir -p %s", b.slave.Path),
)
ssh.Stdout = b.w
ssh.Stderr = b.w
err = ssh.Run()
if err != nil {
// log.Printf("failed to copy [%s] to slave [%s] (err=%v)\ncmd=%v\n",
// fname, b.slave.Name, err, ssh.Args,
// )
return BuildReport{
b.slave,
"failed to copy [" + fname + "]",
err,
}
}
}
ssh := exec.Command(
"scp", fname,
fmt.Sprintf("%s:%s", b.slave.Addr, b.slave.RemoteCommandFileName()),
)
fmt.Fprintf(b.w, "## build -- copying build-script...\n")
b.w.Sync()
ssh.Stdout = b.w
ssh.Stderr = b.w
err = ssh.Run()
if err != nil {
// log.Printf("failed to copy [%s] to slave [%s] (err=%v)\ncmd=%v\n",
// fname, b.slave.Name, err, ssh.Args,
// )
return BuildReport{
b.slave,
"failed to copy [" + fname + "]",
err,
}
}
ssh = exec.Command(
"ssh",
b.slave.Addr,
fmt.Sprintf(
"time %s %s",
b.slave.RemoteCommandFileName(),
b.slave.Path,
),
)
fmt.Fprintf(b.w, "## build -- running build-script...\n")
b.w.Sync()
ssh.Stdout = b.w
ssh.Stderr = b.w
err = ssh.Run()
if err != nil {
// log.Printf("build failed for slave [%s] (err=%v)\n",
// b.slave.Name, err,
// )
return BuildReport{
b.slave,
"build failed",
err,
}
}
// retrieve output
ssh = exec.Command(
"scp",
fmt.Sprintf("%s:%s/output/*.tar.gz", b.slave.Addr, b.slave.Path), // */ dumb emacs
"output/.",
)
fmt.Fprintf(b.w, "## build -- retrieving output(s)...\n")
b.w.Sync()
ssh.Stdout = b.w
ssh.Stderr = b.w
err = ssh.Run()
b.w.Sync()
b.w.Close()
if err != nil {
return BuildReport{
b.slave,
"failed to retrieve outputs",
err,
}
}
ssh = exec.Command(
"ssh",
b.slave.Addr,
fmt.Sprintf(
"/bin/rm -rf %s",
b.slave.Path,
),
)
fmt.Fprintf(b.w, "## build -- cleaning up...\n")
b.w.Sync()
ssh.Stdout = b.w
ssh.Stderr = b.w
err = ssh.Run()
if err != nil {
return BuildReport{
b.slave,
"clean-up failed",
err,
}
}
return BuildReport{b.slave, "ok", nil}
}
func main() {
fmt.Printf(">>>\n>>> buildbot <<<\n>>>\n")
flag.Parse()
config := Config{
Slaves: make([]Slave, 0, 2),
}
f, err := os.Open(*g_config)
if err != nil {
log.Panicf("buildbot: could not open file [%s] (%v)\n", *g_config, err)
}
defer f.Close()
in, err := ioutil.ReadAll(f)
err = yml.Unmarshal(in, &config)
if err != nil {
log.Panicf("buildbot: could not decode file [%s] (%v)\n", *g_config, err)
}
if len(config.Slaves) <= 0 {
log.Printf("buildbot: found no slave to send work to.\n")
os.Exit(2)
}
slaves := config.Slaves
//fmt.Printf(">>> %v\n", slaves)
builders := make([]*Builder, 0, len(slaves))
for _, slave := range slaves {
err = slave.Ping()
if err != nil {
log.Printf("%s\n", err.Error())
continue
}
//fmt.Printf("--- slave [%s] ---\n%v\n", slave.Name, string(out))
err = os.MkdirAll("logs", 0755)
if err != nil {
log.Panicf("could create logs directory ! (err=%v)\n", err)
}
err = os.MkdirAll("output", 0755)
if err != nil {
log.Panicf("could create output directory ! (err=%v)\n", err)
}
fname := filepath.Join("logs", fmt.Sprintf("%s.txt", slave.Name))
logfile, err := os.Create(fname)
if err != nil {
log.Printf(
"could not create logfile [%s] for slave [%s] (err=%v)\n",
fname, slave.Name, err,
)
}
tmpdir, err := ioutil.TempDir("", "go-bldbot-"+time.Now().Format("20060102")+"-")
if err != nil {
log.Panicf("could not create tempdir for slave [%s] (err=%v)\n",
slave.Name, err,
)
}
slave.Path = tmpdir
os.RemoveAll(tmpdir)
builders = append(builders, &Builder{
slave: slave,
w: logfile,
})
}
fmt.Printf(">>> found the following builders:\n")
for _, builder := range builders {
fmt.Printf(
" %s \t(%s:%s)\n",
builder.slave.Name,
builder.slave.Addr,
builder.slave.Path,
)
}
fmt.Printf(">>> launching builders... (parallel=%v)\n", *g_parallel)
done := make(chan BuildReport)
allgood := true
for _, builder := range builders {
fmt.Printf(" %s...\n", builder.slave.Name)
if *g_parallel {
go func(builder *Builder) {
done <- builder.run()
}(builder)
} else {
resp := builder.run()
if resp.err != nil {
log.Printf(
"build failed for slave [%s]:\n%v\nmsg=%s\n",
resp.slave.Name, resp.err, resp.msg,
)
allgood = false
continue
}
}
}
fmt.Printf(">>> launching builders... (parallel=%v) [done]\n", *g_parallel)
if *g_parallel {
for _ = range builders {
report := <-done
if report.err != nil {
log.Printf(
"build failed for slave [%s]:\n%v\n",
report.slave.Name, report.err,
)
allgood = false
continue
}
}
}
fmt.Printf(">>> all good: %v\n", allgood)
if !allgood {
os.Exit(1)
}
}