woodpecker/cmd/drone/drone.go

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package main
import (
"bytes"
"flag"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"sync"
"time"
"github.com/drone/drone/pkg/build"
"github.com/drone/drone/pkg/build/docker"
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"github.com/drone/drone/pkg/build/log"
"github.com/drone/drone/pkg/build/repo"
"github.com/drone/drone/pkg/build/script"
"launchpad.net/goyaml"
)
var (
// identity file (id_rsa) that will be injected
// into the container if specified
identity = flag.String("identity", "", "")
// runs Drone in parallel mode if True
parallel = flag.Bool("parallel", false, "")
// build will timeout after N milliseconds.
// this will default to 500 minutes (6 hours)
timeout = flag.Duration("timeout", 300*time.Minute, "")
// build will run in a privileged container
privileged = flag.Bool("privileged", false, "")
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// runs Drone with verbose output if True
verbose = flag.Bool("v", false, "")
// displays the help / usage if True
help = flag.Bool("h", false, "")
)
func init() {
// default logging
log.SetPrefix("\033[2m[DRONE] ")
log.SetSuffix("\033[0m\n")
log.SetOutput(os.Stdout)
log.SetPriority(log.LOG_NOTICE)
}
func main() {
// Parse the input parameters
flag.Usage = usage
flag.Parse()
if *help {
flag.Usage()
os.Exit(0)
}
if *verbose {
log.SetPriority(log.LOG_DEBUG)
}
// Must speicify a command
args := flag.Args()
if len(args) == 0 {
flag.Usage()
os.Exit(0)
}
switch {
// run drone build assuming the current
// working directory contains the drone.yml
case args[0] == "build" && len(args) == 1:
path, _ := os.Getwd()
path = filepath.Join(path, ".drone.yml")
run(path)
// run drone build where the path to the
// source directory is provided
case args[0] == "build" && len(args) == 2:
path := args[1]
path = filepath.Clean(path)
path, _ = filepath.Abs(path)
path = filepath.Join(path, ".drone.yml")
run(path)
// run drone vet where the path to the
// source directory is provided
case args[0] == "vet" && len(args) == 2:
path := args[1]
path = filepath.Clean(path)
path, _ = filepath.Abs(path)
path = filepath.Join(path, ".drone.yml")
vet(path)
// run drone vet assuming the current
// working directory contains the drone.yml
case args[0] == "vet" && len(args) == 1:
path, _ := os.Getwd()
path = filepath.Join(path, ".drone.yml")
vet(path)
// print the help message
case args[0] == "help" && len(args) == 1:
flag.Usage()
}
os.Exit(0)
}
func vet(path string) {
// parse the Drone yml file
script, err := script.ParseBuildFile(path)
if err != nil {
log.Err(err.Error())
os.Exit(1)
return
}
// print the Drone yml as parsed
out, _ := goyaml.Marshal(script)
log.Noticef("parsed yaml:\n%s", string(out))
}
func run(path string) {
dockerClient := docker.New()
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// parse the Drone yml file
s, err := script.ParseBuildFile(path)
if err != nil {
log.Err(err.Error())
os.Exit(1)
return
}
// get the repository root directory
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dir := filepath.Dir(path)
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code := repo.Repo{
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Name: filepath.Base(dir),
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Branch: "HEAD", // should we do this?
Path: dir,
}
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// does the local repository match the
// $GOPATH/src/{package} pattern? This is
// important so we know the target location
// where the code should be copied inside
// the container.
if gopath, ok := getRepoPath(dir); ok {
code.Dir = gopath
} else if gopath, ok := getGoPath(dir); ok {
// in this case we found a GOPATH and
// reverse engineered the package path
code.Dir = gopath
} else {
// otherwise just use directory name
code.Dir = filepath.Base(dir)
}
// this is where the code gets uploaded to the container
// TODO move this code to the build package
code.Dir = filepath.Join("/var/cache/drone/src", filepath.Clean(code.Dir))
// track all build results
var builders []*build.Builder
// ssh key to import into container
var key []byte
if len(*identity) != 0 {
key, err = ioutil.ReadFile(*identity)
if err != nil {
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fmt.Printf("[Error] Could not find or read identity file %s\n", *identity)
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os.Exit(1)
return
}
}
builds := []*script.Build{s}
// loop through and create builders
for _, b := range builds { //script.Builds {
builder := build.New(dockerClient)
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builder.Build = b
builder.Repo = &code
builder.Key = key
builder.Stdout = os.Stdout
builder.Timeout = *timeout
builder.Privileged = *privileged
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if *parallel == true {
var buf bytes.Buffer
builder.Stdout = &buf
}
builders = append(builders, builder)
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}
switch *parallel {
case false:
runSequential(builders)
case true:
runParallel(builders)
}
// if in parallel mode, print out the buffer
// if we had a failure
for _, builder := range builders {
if builder.BuildState.ExitCode == 0 {
continue
}
if buf, ok := builder.Stdout.(*bytes.Buffer); ok {
log.Noticef("printing stdout for failed build %s", builder.Build.Name)
println(buf.String())
}
}
// this exit code is initially 0 and will
// be set to an error code if any of the
// builds fail.
var exit int
fmt.Printf("\nDrone Build Results \033[90m(%v)\033[0m\n", len(builders))
// loop through and print results
for _, builder := range builders {
build := builder.Build
res := builder.BuildState
duration := time.Duration(res.Finished - res.Started)
switch {
case builder.BuildState.ExitCode == 0:
fmt.Printf(" \033[32m\u2713\033[0m %v \033[90m(%v)\033[0m\n", build.Name, humanizeDuration(duration*time.Second))
case builder.BuildState.ExitCode != 0:
fmt.Printf(" \033[31m\u2717\033[0m %v \033[90m(%v)\033[0m\n", build.Name, humanizeDuration(duration*time.Second))
exit = builder.BuildState.ExitCode
}
}
os.Exit(exit)
}
func runSequential(builders []*build.Builder) {
// loop through and execute each build
for _, builder := range builders {
if err := builder.Run(); err != nil {
log.Errf("Error executing build: %s", err.Error())
os.Exit(1)
}
}
}
func runParallel(builders []*build.Builder) {
// spawn four worker goroutines
var wg sync.WaitGroup
for _, builder := range builders {
// Increment the WaitGroup counter
wg.Add(1)
// Launch a goroutine to run the build
go func(builder *build.Builder) {
defer wg.Done()
builder.Run()
}(builder)
time.Sleep(500 * time.Millisecond) // get weird iptables failures unless we sleep.
}
// wait for the workers to finish
wg.Wait()
}
var usage = func() {
fmt.Println(`Drone is a tool for building and testing code in Docker containers.
Usage:
drone command [arguments]
The commands are:
build build and test the repository
version print the version number
vet validate the yaml configuration file
-v runs drone with verbose output
-h display this help and exit
--parallel runs drone build tasks in parallel
--timeout=300ms timeout build after 300 milliseconds
--privileged runs drone build in a privileged container
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Examples:
drone build builds the source in the pwd
drone build /path/to/repo builds the source repository
Use "drone help [command]" for more information about a command.
`)
}