package images import ( "archive/tar" "compress/gzip" "context" "encoding/json" "io" "io/ioutil" "net/http" "net/url" "os" "path/filepath" "regexp" "strconv" "strings" "github.com/containers/buildah" "github.com/containers/podman/v2/pkg/auth" "github.com/containers/podman/v2/pkg/bindings" "github.com/containers/podman/v2/pkg/domain/entities" "github.com/containers/storage/pkg/fileutils" "github.com/docker/go-units" "github.com/hashicorp/go-multierror" jsoniter "github.com/json-iterator/go" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) // Build creates an image using a containerfile reference func Build(ctx context.Context, containerFiles []string, options entities.BuildOptions) (*entities.BuildReport, error) { params := url.Values{} if caps := options.AddCapabilities; len(caps) > 0 { c, err := jsoniter.MarshalToString(caps) if err != nil { return nil, err } params.Add("addcaps", c) } if annotations := options.Annotations; len(annotations) > 0 { l, err := jsoniter.MarshalToString(annotations) if err != nil { return nil, err } params.Set("annotations", l) } params.Add("t", options.Output) for _, tag := range options.AdditionalTags { params.Add("t", tag) } if buildArgs := options.Args; len(buildArgs) > 0 { bArgs, err := jsoniter.MarshalToString(buildArgs) if err != nil { return nil, err } params.Set("buildargs", bArgs) } if cpuShares := options.CommonBuildOpts.CPUShares; cpuShares > 0 { params.Set("cpushares", strconv.Itoa(int(cpuShares))) } if cpuSetCpus := options.CommonBuildOpts.CPUSetCPUs; len(cpuSetCpus) > 0 { params.Set("cpusetcpus", cpuSetCpus) } if cpuPeriod := options.CommonBuildOpts.CPUPeriod; cpuPeriod > 0 { params.Set("cpuperiod", strconv.Itoa(int(cpuPeriod))) } if cpuQuota := options.CommonBuildOpts.CPUQuota; cpuQuota > 0 { params.Set("cpuquota", strconv.Itoa(int(cpuQuota))) } params.Set("networkmode", strconv.Itoa(int(options.ConfigureNetwork))) params.Set("outputformat", options.OutputFormat) if devices := options.Devices; len(devices) > 0 { d, err := jsoniter.MarshalToString(devices) if err != nil { return nil, err } params.Add("devices", d) } if caps := options.DropCapabilities; len(caps) > 0 { c, err := jsoniter.MarshalToString(caps) if err != nil { return nil, err } params.Add("dropcaps", c) } if options.ForceRmIntermediateCtrs { params.Set("forcerm", "1") } if len(options.From) > 0 { params.Set("from", options.From) } params.Set("isolation", strconv.Itoa(int(options.Isolation))) if options.CommonBuildOpts.HTTPProxy { params.Set("httpproxy", "1") } if options.Jobs != nil { params.Set("jobs", strconv.FormatUint(uint64(*options.Jobs), 10)) } if labels := options.Labels; len(labels) > 0 { l, err := jsoniter.MarshalToString(labels) if err != nil { return nil, err } params.Set("labels", l) } if options.Layers { params.Set("layers", "1") } if options.LogRusage { params.Set("rusage", "1") } if len(options.Manifest) > 0 { params.Set("manifest", options.Manifest) } if memSwap := options.CommonBuildOpts.MemorySwap; memSwap > 0 { params.Set("memswap", strconv.Itoa(int(memSwap))) } if mem := options.CommonBuildOpts.Memory; mem > 0 { params.Set("memory", strconv.Itoa(int(mem))) } if options.NoCache { params.Set("nocache", "1") } if t := options.Output; len(t) > 0 { params.Set("output", t) } var platform string if len(options.OS) > 0 { platform = options.OS } if len(options.Architecture) > 0 { if len(platform) == 0 { platform = "linux" } platform += "/" + options.Architecture } if len(platform) > 0 { params.Set("platform", platform) } if options.PullPolicy == buildah.PullAlways { params.Set("pull", "1") } if options.Quiet { params.Set("q", "1") } if options.RemoveIntermediateCtrs { params.Set("rm", "1") } if hosts := options.CommonBuildOpts.AddHost; len(hosts) > 0 { h, err := jsoniter.MarshalToString(hosts) if err != nil { return nil, err } params.Set("extrahosts", h) } if shmSize := options.CommonBuildOpts.ShmSize; len(shmSize) > 0 { shmBytes, err := units.RAMInBytes(shmSize) if err != nil { return nil, err } params.Set("shmsize", strconv.Itoa(int(shmBytes))) } if options.Squash { params.Set("squash", "1") } var ( headers map[string]string err error ) if options.SystemContext == nil { headers, err = auth.Header(options.SystemContext, auth.XRegistryConfigHeader, "", "", "") } else { if options.SystemContext.DockerAuthConfig != nil { headers, err = auth.Header(options.SystemContext, auth.XRegistryAuthHeader, options.SystemContext.AuthFilePath, options.SystemContext.DockerAuthConfig.Username, options.SystemContext.DockerAuthConfig.Password) } else { headers, err = auth.Header(options.SystemContext, auth.XRegistryConfigHeader, options.SystemContext.AuthFilePath, "", "") } } if err != nil { return nil, err } stdout := io.Writer(os.Stdout) if options.Out != nil { stdout = options.Out } entries := make([]string, len(containerFiles)) copy(entries, containerFiles) entries = append(entries, options.ContextDirectory) excludes := options.Excludes if len(excludes) == 0 { excludes, err = parseDockerignore(options.ContextDirectory) if err != nil { return nil, err } } tarfile, err := nTar(excludes, entries...) if err != nil { logrus.Errorf("cannot tar container entries %v error: %v", entries, err) return nil, err } defer tarfile.Close() containerFile, err := filepath.Abs(entries[0]) if err != nil { logrus.Errorf("cannot find absolute path of %v: %v", entries[0], err) return nil, err } contextDir, err := filepath.Abs(entries[1]) if err != nil { logrus.Errorf("cannot find absolute path of %v: %v", entries[1], err) return nil, err } if strings.HasPrefix(containerFile, contextDir+string(filepath.Separator)) { containerFile = strings.TrimPrefix(containerFile, contextDir+string(filepath.Separator)) } params.Set("dockerfile", containerFile) conn, err := bindings.GetClient(ctx) if err != nil { return nil, err } response, err := conn.DoRequest(tarfile, http.MethodPost, "/build", params, headers) if err != nil { return nil, err } defer response.Body.Close() if !response.IsSuccess() { return nil, response.Process(err) } body := response.Body.(io.Reader) if logrus.IsLevelEnabled(logrus.DebugLevel) { if v, found := os.LookupEnv("PODMAN_RETAIN_BUILD_ARTIFACT"); found { if keep, _ := strconv.ParseBool(v); keep { t, _ := ioutil.TempFile("", "build_*_client") defer t.Close() body = io.TeeReader(response.Body, t) } } } dec := json.NewDecoder(body) re := regexp.MustCompile(`[0-9a-f]{12}`) var id string for { var s struct { Stream string `json:"stream,omitempty"` Error string `json:"error,omitempty"` } if err := dec.Decode(&s); err != nil { if errors.Is(err, io.EOF) { return &entities.BuildReport{ID: id}, nil } s.Error = err.Error() + "\n" } switch { case s.Stream != "": stdout.Write([]byte(s.Stream)) if re.Match([]byte(s.Stream)) { id = strings.TrimSuffix(s.Stream, "\n") } case s.Error != "": return nil, errors.New(s.Error) default: return &entities.BuildReport{ID: id}, errors.New("failed to parse build results stream, unexpected input") } } } func nTar(excludes []string, sources ...string) (io.ReadCloser, error) { pm, err := fileutils.NewPatternMatcher(excludes) if err != nil { return nil, errors.Wrapf(err, "error processing excludes list %v", excludes) } if len(sources) == 0 { return nil, errors.New("No source(s) provided for build") } pr, pw := io.Pipe() gw := gzip.NewWriter(pw) tw := tar.NewWriter(gw) var merr error go func() { defer pw.Close() defer gw.Close() defer tw.Close() for _, src := range sources { s, err := filepath.Abs(src) if err != nil { logrus.Errorf("cannot stat one of source context: %v", err) merr = multierror.Append(merr, err) return } err = filepath.Walk(s, func(path string, info os.FileInfo, err error) error { if err != nil { return err } if path == s { return nil // skip root dir } name := strings.TrimPrefix(path, s+string(filepath.Separator)) excluded, err := pm.Matches(filepath.ToSlash(name)) // nolint:staticcheck if err != nil { return errors.Wrapf(err, "error checking if %q is excluded", name) } if excluded { return nil } if info.Mode().IsRegular() { // add file item f, lerr := os.Open(path) if lerr != nil { return lerr } hdr, lerr := tar.FileInfoHeader(info, name) if lerr != nil { f.Close() return lerr } hdr.Name = name if lerr := tw.WriteHeader(hdr); lerr != nil { f.Close() return lerr } _, cerr := io.Copy(tw, f) f.Close() return cerr } else if info.Mode().IsDir() { // add folders hdr, lerr := tar.FileInfoHeader(info, name) if lerr != nil { return lerr } hdr.Name = name if lerr := tw.WriteHeader(hdr); lerr != nil { return lerr } } else if info.Mode()&os.ModeSymlink != 0 { // add symlinks as it, not content link, err := os.Readlink(path) if err != nil { return err } hdr, lerr := tar.FileInfoHeader(info, link) if lerr != nil { return lerr } hdr.Name = name if lerr := tw.WriteHeader(hdr); lerr != nil { return lerr } } //skip other than file,folder and symlinks return nil }) merr = multierror.Append(merr, err) } }() return pr, merr } func parseDockerignore(root string) ([]string, error) { ignore, err := ioutil.ReadFile(filepath.Join(root, ".dockerignore")) if err != nil && !os.IsNotExist(err) { return nil, errors.Wrapf(err, "error reading .dockerignore: '%s'", root) } rawexcludes := strings.Split(string(ignore), "\n") excludes := make([]string, 0, len(rawexcludes)) for _, e := range rawexcludes { if len(e) == 0 || e[0] == '#' { continue } excludes = append(excludes, e) } return excludes, nil }