forked from docker/libcompose
/
builder.go
208 lines (177 loc) · 6 KB
/
builder.go
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package builder
import (
"fmt"
"io"
"os"
"path"
"path/filepath"
"strings"
"golang.org/x/net/context"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/api/types"
"github.com/docker/docker/builder"
"github.com/docker/docker/builder/dockerignore"
"github.com/docker/docker/client"
"github.com/docker/docker/pkg/archive"
"github.com/docker/docker/pkg/fileutils"
"github.com/docker/docker/pkg/jsonmessage"
"github.com/docker/docker/pkg/progress"
"github.com/docker/docker/pkg/streamformatter"
"github.com/docker/docker/pkg/term"
"github.com/docker/libcompose/logger"
)
// DefaultDockerfileName is the default name of a Dockerfile
const DefaultDockerfileName = "Dockerfile"
// Builder defines methods to provide a docker builder. This makes libcompose
// not tied up to the docker daemon builder.
type Builder interface {
Build(imageName string) error
}
// DaemonBuilder is the daemon "docker build" Builder implementation.
type DaemonBuilder struct {
Client client.ImageAPIClient
ContextDirectory string
Dockerfile string
AuthConfigs map[string]types.AuthConfig
NoCache bool
ForceRemove bool
Pull bool
BuildArgs map[string]string
LoggerFactory logger.Factory
}
// Build implements Builder. It consumes the docker build API endpoint and sends
// a tar of the specified service build context.
func (d *DaemonBuilder) Build(ctx context.Context, imageName string) error {
buildCtx, err := CreateTar(d.ContextDirectory, d.Dockerfile)
if err != nil {
return err
}
defer buildCtx.Close()
if d.LoggerFactory == nil {
d.LoggerFactory = &logger.NullLogger{}
}
l := d.LoggerFactory.CreateBuildLogger(imageName)
progBuff := &logger.Wrapper{
Err: false,
Logger: l,
}
buildBuff := &logger.Wrapper{
Err: false,
Logger: l,
}
errBuff := &logger.Wrapper{
Err: true,
Logger: l,
}
// Setup an upload progress bar
progressOutput := streamformatter.NewStreamFormatter().NewProgressOutput(progBuff, true)
var body io.Reader = progress.NewProgressReader(buildCtx, progressOutput, 0, "", "Sending build context to Docker daemon")
logrus.Infof("Building %s...", imageName)
outFd, isTerminalOut := term.GetFdInfo(os.Stdout)
w := l.OutWriter()
if w != nil {
outFd, isTerminalOut = term.GetFdInfo(w)
}
response, err := d.Client.ImageBuild(ctx, body, types.ImageBuildOptions{
Tags: []string{imageName},
NoCache: d.NoCache,
Remove: true,
ForceRemove: d.ForceRemove,
PullParent: d.Pull,
Dockerfile: d.Dockerfile,
AuthConfigs: d.AuthConfigs,
BuildArgs: d.BuildArgs,
})
if err != nil {
return err
}
err = jsonmessage.DisplayJSONMessagesStream(response.Body, buildBuff, outFd, isTerminalOut, nil)
if err != nil {
if jerr, ok := err.(*jsonmessage.JSONError); ok {
// If no error code is set, default to 1
if jerr.Code == 0 {
jerr.Code = 1
}
errBuff.Write([]byte(jerr.Error()))
return fmt.Errorf("Status: %s, Code: %d", jerr.Message, jerr.Code)
}
}
return err
}
// CreateTar create a build context tar for the specified project and service name.
func CreateTar(contextDirectory, dockerfile string) (io.ReadCloser, error) {
// This code was ripped off from docker/api/client/build.go
dockerfileName := filepath.Join(contextDirectory, dockerfile)
absContextDirectory, err := filepath.Abs(contextDirectory)
if err != nil {
return nil, err
}
filename := dockerfileName
if dockerfile == "" {
// No -f/--file was specified so use the default
dockerfileName = DefaultDockerfileName
filename = filepath.Join(absContextDirectory, dockerfileName)
// Just to be nice ;-) look for 'dockerfile' too but only
// use it if we found it, otherwise ignore this check
if _, err = os.Lstat(filename); os.IsNotExist(err) {
tmpFN := path.Join(absContextDirectory, strings.ToLower(dockerfileName))
if _, err = os.Lstat(tmpFN); err == nil {
dockerfileName = strings.ToLower(dockerfileName)
filename = tmpFN
}
}
}
origDockerfile := dockerfileName // used for error msg
if filename, err = filepath.Abs(filename); err != nil {
return nil, err
}
// Now reset the dockerfileName to be relative to the build context
dockerfileName, err = filepath.Rel(absContextDirectory, filename)
if err != nil {
return nil, err
}
// And canonicalize dockerfile name to a platform-independent one
dockerfileName, err = archive.CanonicalTarNameForPath(dockerfileName)
if err != nil {
return nil, fmt.Errorf("Cannot canonicalize dockerfile path %s: %v", dockerfileName, err)
}
if _, err = os.Lstat(filename); os.IsNotExist(err) {
return nil, fmt.Errorf("Cannot locate Dockerfile: %s", origDockerfile)
}
var includes = []string{"."}
var excludes []string
dockerIgnorePath := path.Join(contextDirectory, ".dockerignore")
dockerIgnore, err := os.Open(dockerIgnorePath)
if err != nil {
if !os.IsNotExist(err) {
return nil, err
}
logrus.Warnf("Error while reading .dockerignore (%s) : %s", dockerIgnorePath, err.Error())
excludes = make([]string, 0)
} else {
excludes, err = dockerignore.ReadAll(dockerIgnore)
if err != nil {
return nil, err
}
}
// If .dockerignore mentions .dockerignore or the Dockerfile
// then make sure we send both files over to the daemon
// because Dockerfile is, obviously, needed no matter what, and
// .dockerignore is needed to know if either one needs to be
// removed. The deamon will remove them for us, if needed, after it
// parses the Dockerfile.
keepThem1, _ := fileutils.Matches(".dockerignore", excludes)
keepThem2, _ := fileutils.Matches(dockerfileName, excludes)
if keepThem1 || keepThem2 {
includes = append(includes, ".dockerignore", dockerfileName)
}
if err := builder.ValidateContextDirectory(contextDirectory, excludes); err != nil {
return nil, fmt.Errorf("Error checking context is accessible: '%s'. Please check permissions and try again.", err)
}
options := &archive.TarOptions{
Compression: archive.Uncompressed,
ExcludePatterns: excludes,
IncludeFiles: includes,
}
return archive.TarWithOptions(contextDirectory, options)
}