mirror of
https://github.com/clearlinux/docker.git
synced 2026-10-04 15:58:39 +00:00
Move docker build to client
This commit is contained in:
Guillaume J. Charmes
@@ -0,0 +1,275 @@
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package docker
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"github.com/dotcloud/docker/utils"
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"io"
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"net/url"
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"os"
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"reflect"
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"strings"
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)
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type BuilderClient struct {
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builder *Builder
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cli *DockerCli
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image string
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maintainer string
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config *Config
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tmpContainers map[string]struct{}
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tmpImages map[string]struct{}
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needCommit bool
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}
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func (b *BuilderClient) clearTmp(containers, images map[string]struct{}) {
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for c := range containers {
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tmp := b.builder.runtime.Get(c)
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b.builder.runtime.Destroy(tmp)
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utils.Debugf("Removing container %s", c)
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}
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for i := range images {
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b.builder.runtime.graph.Delete(i)
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utils.Debugf("Removing image %s", i)
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}
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}
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func (b *BuilderClient) From(name string) error {
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obj, statusCode, err := b.cli.call("GET", "/images/"+name+"/json", nil)
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if statusCode == 404 {
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if err := b.cli.hijack("POST", "/images/create?fromImage="+name, false); err != nil {
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return err
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}
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obj, _, err = b.cli.call("GET", "/images/"+name+"/json", nil)
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if err != nil {
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return err
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}
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}
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if err != nil {
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return err
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}
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img := &ApiImages{}
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if err := json.Unmarshal(obj, img); err != nil {
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return err
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}
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b.image = img.Id
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return nil
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}
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func (b *BuilderClient) Maintainer(name string) error {
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b.needCommit = true
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b.maintainer = name
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return nil
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}
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func (b *BuilderClient) Run(args string) error {
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if b.image == "" {
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return fmt.Errorf("Please provide a source image with `from` prior to run")
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}
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config, _, err := ParseRun([]string{b.image, "/bin/sh", "-c", args}, b.builder.runtime.capabilities)
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if err != nil {
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return err
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}
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MergeConfig(b.config, config)
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body, statusCode, err := b.cli.call("POST", "/images/getCache", &ApiImageConfig{Id: b.image, Config: b.config})
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if err != nil {
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if statusCode != 404 {
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return err
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}
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}
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if statusCode != 404 {
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apiId := &ApiId{}
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if err := json.Unmarshal(body, apiId); err != nil {
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return err
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}
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b.image = apiId.Id
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return nil
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}
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body, _, err = b.cli.call("POST", "/containers/create", b.config)
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if err != nil {
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return err
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}
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out := &ApiRun{}
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err = json.Unmarshal(body, out)
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if err != nil {
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return err
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}
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for _, warning := range out.Warnings {
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fmt.Fprintln(os.Stderr, "WARNING: ", warning)
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}
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//start the container
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_, _, err = b.cli.call("POST", "/containers/"+out.Id+"/start", nil)
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if err != nil {
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return err
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}
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b.tmpContainers[out.Id] = struct{}{}
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// Wait for it to finish
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_, _, err = b.cli.call("POST", "/containers/"+out.Id+"/wait", nil)
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if err != nil {
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return err
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}
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// Commit the container
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v := url.Values{}
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v.Set("container", out.Id)
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v.Set("author", b.maintainer)
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body, _, err = b.cli.call("POST", "/commit?"+v.Encode(), b.config)
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if err != nil {
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return err
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}
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apiId := &ApiId{}
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err = json.Unmarshal(body, apiId)
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if err != nil {
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return err
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}
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b.tmpImages[apiId.Id] = struct{}{}
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b.image = apiId.Id
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b.needCommit = false
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return nil
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}
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func (b *BuilderClient) Env(args string) error {
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b.needCommit = true
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tmp := strings.SplitN(args, " ", 2)
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if len(tmp) != 2 {
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return fmt.Errorf("Invalid ENV format")
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}
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key := strings.Trim(tmp[0], " ")
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value := strings.Trim(tmp[1], " ")
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for i, elem := range b.config.Env {
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if strings.HasPrefix(elem, key+"=") {
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b.config.Env[i] = key + "=" + value
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return nil
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}
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}
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b.config.Env = append(b.config.Env, key+"="+value)
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return nil
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}
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func (b *BuilderClient) Cmd(args string) error {
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b.needCommit = true
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b.config.Cmd = []string{"/bin/sh", "-c", args}
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return nil
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}
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func (b *BuilderClient) Expose(args string) error {
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ports := strings.Split(args, " ")
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b.config.PortSpecs = append(ports, b.config.PortSpecs...)
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return nil
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}
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func (b *BuilderClient) Insert(args string) error {
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// FIXME: Reimplement this once the remove_hijack branch gets merged.
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// We need to retrieve the resulting Id
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return fmt.Errorf("INSERT not implemented")
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}
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func NewBuilderClient(dockerfile io.Reader) (string, error) {
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// defer b.clearTmp(tmpContainers, tmpImages)
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b := &BuilderClient{
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cli: NewDockerCli("0.0.0.0", 4243),
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}
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file := bufio.NewReader(dockerfile)
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for {
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line, err := file.ReadString('\n')
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if err != nil {
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if err == io.EOF {
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break
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}
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return "", err
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}
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line = strings.Replace(strings.TrimSpace(line), " ", " ", 1)
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// Skip comments and empty line
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if len(line) == 0 || line[0] == '#' {
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continue
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}
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tmp := strings.SplitN(line, " ", 2)
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if len(tmp) != 2 {
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return "", fmt.Errorf("Invalid Dockerfile format")
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}
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instruction := strings.ToLower(strings.Trim(tmp[0], " "))
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arguments := strings.Trim(tmp[1], " ")
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fmt.Printf("%s %s\n", strings.ToUpper(instruction), arguments)
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method, exists := reflect.TypeOf(b).MethodByName(strings.ToUpper(instruction[:1]) + strings.ToLower(instruction[1:]))
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if !exists {
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fmt.Printf("Skipping unknown instruction %s\n", strings.ToUpper(instruction))
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}
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ret := method.Func.Call([]reflect.Value{reflect.ValueOf(b), reflect.ValueOf(arguments)})[0].Interface()
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if ret != nil {
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return "", ret.(error)
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}
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fmt.Printf("===> %v\n", b.image)
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}
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if b.needCommit {
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body, _, err = b.cli.call("POST", "/containers/create", b.config)
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if err != nil {
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return err
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}
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out := &ApiRun{}
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err = json.Unmarshal(body, out)
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if err != nil {
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return err
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}
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for _, warning := range out.Warnings {
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fmt.Fprintln(os.Stderr, "WARNING: ", warning)
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}
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//start the container
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_, _, err = b.cli.call("POST", "/containers/"+out.Id+"/start", nil)
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if err != nil {
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return err
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}
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b.tmpContainers[out.Id] = struct{}{}
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// Wait for it to finish
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_, _, err = b.cli.call("POST", "/containers/"+out.Id+"/wait", nil)
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if err != nil {
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return err
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}
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// Commit the container
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v := url.Values{}
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v.Set("container", out.Id)
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v.Set("author", b.maintainer)
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body, _, err = b.cli.call("POST", "/commit?"+v.Encode(), b.config)
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if err != nil {
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return err
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}
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apiId := &ApiId{}
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err = json.Unmarshal(body, apiId)
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if err != nil {
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return err
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}
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b.tmpImages[apiId.Id] = struct{}{}
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b.image = apiId.Id
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}
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if b.image != "" {
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// The build is successful, keep the temporary containers and images
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for i := range b.tmpImages {
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delete(b.tmpImages, i)
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}
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for i := range b.tmpContainers {
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delete(b.tmpContainers, i)
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}
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fmt.Printf("Build finished. image id: %s\n", b.image)
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return b.image, nil
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}
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return "", fmt.Errorf("An error occured during the build\n")
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}
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