summaryrefslogtreecommitdiff
path: root/pkg/api/handlers/compat/images_build.go
blob: 0ebf74f98fb4e5da347f90cfbe31fc2672c64ffd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
package compat

import (
	"context"
	"encoding/json"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"time"

	"github.com/containers/buildah"
	buildahDefine "github.com/containers/buildah/define"
	"github.com/containers/buildah/pkg/parse"
	"github.com/containers/image/v5/types"
	"github.com/containers/podman/v4/libpod"
	"github.com/containers/podman/v4/pkg/api/handlers/utils"
	api "github.com/containers/podman/v4/pkg/api/types"
	"github.com/containers/podman/v4/pkg/auth"
	"github.com/containers/podman/v4/pkg/channel"
	"github.com/containers/podman/v4/pkg/rootless"
	"github.com/containers/storage/pkg/archive"
	"github.com/docker/docker/pkg/jsonmessage"
	"github.com/gorilla/schema"
	"github.com/opencontainers/runtime-spec/specs-go"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
)

func BuildImage(w http.ResponseWriter, r *http.Request) {
	if hdr, found := r.Header["Content-Type"]; found && len(hdr) > 0 {
		contentType := hdr[0]
		switch contentType {
		case "application/tar":
			logrus.Infof("tar file content type is  %s, should use \"application/x-tar\" content type", contentType)
		case "application/x-tar":
			break
		default:
			if utils.IsLibpodRequest(r) {
				utils.BadRequest(w, "Content-Type", hdr[0],
					fmt.Errorf("Content-Type: %s is not supported. Should be \"application/x-tar\"", hdr[0]))
				return
			}
			logrus.Infof("tar file content type is  %s, should use \"application/x-tar\" content type", contentType)
		}
	}

	contextDirectory, err := extractTarFile(r)
	if err != nil {
		utils.InternalServerError(w, err)
		return
	}

	defer func() {
		if logrus.IsLevelEnabled(logrus.DebugLevel) {
			if v, found := os.LookupEnv("PODMAN_RETAIN_BUILD_ARTIFACT"); found {
				if keep, _ := strconv.ParseBool(v); keep {
					return
				}
			}
		}
		err := os.RemoveAll(filepath.Dir(contextDirectory))
		if err != nil {
			logrus.Warn(errors.Wrapf(err, "failed to remove build scratch directory %q", filepath.Dir(contextDirectory)))
		}
	}()

	query := struct {
		AddHosts               string   `schema:"extrahosts"`
		AdditionalCapabilities string   `schema:"addcaps"`
		Annotations            string   `schema:"annotations"`
		AppArmor               string   `schema:"apparmor"`
		AllPlatforms           bool     `schema:"allplatforms"`
		BuildArgs              string   `schema:"buildargs"`
		CacheFrom              string   `schema:"cachefrom"`
		Compression            uint64   `schema:"compression"`
		ConfigureNetwork       string   `schema:"networkmode"`
		CpuPeriod              uint64   `schema:"cpuperiod"`    // nolint
		CpuQuota               int64    `schema:"cpuquota"`     // nolint
		CpuSetCpus             string   `schema:"cpusetcpus"`   // nolint
		CpuSetMems             string   `schema:"cpusetmems"`   // nolint
		CpuShares              uint64   `schema:"cpushares"`    // nolint
		CgroupParent           string   `schema:"cgroupparent"` // nolint
		DNSOptions             string   `schema:"dnsoptions"`
		DNSSearch              string   `schema:"dnssearch"`
		DNSServers             string   `schema:"dnsservers"`
		Devices                string   `schema:"devices"`
		Dockerfile             string   `schema:"dockerfile"`
		DropCapabilities       string   `schema:"dropcaps"`
		Excludes               string   `schema:"excludes"`
		ForceRm                bool     `schema:"forcerm"`
		From                   string   `schema:"from"`
		HTTPProxy              bool     `schema:"httpproxy"`
		Ignore                 bool     `schema:"ignore"`
		Isolation              string   `schema:"isolation"`
		Jobs                   int      `schema:"jobs"` // nolint
		LabelOpts              string   `schema:"labelopts"`
		Labels                 string   `schema:"labels"`
		Layers                 bool     `schema:"layers"`
		LogRusage              bool     `schema:"rusage"`
		Manifest               string   `schema:"manifest"`
		MemSwap                int64    `schema:"memswap"`
		Memory                 int64    `schema:"memory"`
		NamespaceOptions       string   `schema:"nsoptions"`
		NoCache                bool     `schema:"nocache"`
		OutputFormat           string   `schema:"outputformat"`
		Platform               []string `schema:"platform"`
		Pull                   bool     `schema:"pull"`
		PullPolicy             string   `schema:"pullpolicy"`
		Quiet                  bool     `schema:"q"`
		Registry               string   `schema:"registry"`
		Rm                     bool     `schema:"rm"`
		RusageLogFile          string   `schema:"rusagelogfile"`
		Seccomp                string   `schema:"seccomp"`
		SecurityOpt            string   `schema:"securityopt"`
		ShmSize                int      `schema:"shmsize"`
		Squash                 bool     `schema:"squash"`
		Tags                   []string `schema:"t"`
		Target                 string   `schema:"target"`
		Timestamp              int64    `schema:"timestamp"`
		Ulimits                string   `schema:"ulimits"`
		UnsetEnvs              []string `schema:"unsetenv"`
		Secrets                string   `schema:"secrets"`
	}{
		Dockerfile: "Dockerfile",
		Registry:   "docker.io",
		Rm:         true,
		ShmSize:    64 * 1024 * 1024,
	}

	decoder := r.Context().Value(api.DecoderKey).(*schema.Decoder)
	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
		utils.Error(w, http.StatusBadRequest, err)
		return
	}

	// if layers field not set assume its not from a valid podman-client
	// could be a docker client, set `layers=true` since that is the default
	// expected behaviour
	if !utils.IsLibpodRequest(r) {
		if _, found := r.URL.Query()["layers"]; !found {
			query.Layers = true
		}
	}

	// convert tag formats
	tags := query.Tags

	// convert addcaps formats
	var addCaps = []string{}
	if _, found := r.URL.Query()["addcaps"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.AdditionalCapabilities), &m); err != nil {
			utils.BadRequest(w, "addcaps", query.AdditionalCapabilities, err)
			return
		}
		addCaps = m
	}

	// convert addcaps formats
	containerFiles := []string{}
	if _, found := r.URL.Query()["dockerfile"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.Dockerfile), &m); err != nil {
			// it's not json, assume just a string
			m = []string{filepath.Join(contextDirectory, query.Dockerfile)}
		}
		containerFiles = m
	} else {
		containerFiles = []string{filepath.Join(contextDirectory, "Dockerfile")}
		if utils.IsLibpodRequest(r) {
			containerFiles = []string{filepath.Join(contextDirectory, "Containerfile")}
			if _, err = os.Stat(containerFiles[0]); err != nil {
				containerFiles = []string{filepath.Join(contextDirectory, "Dockerfile")}
				if _, err1 := os.Stat(containerFiles[0]); err1 != nil {
					utils.BadRequest(w, "dockerfile", query.Dockerfile, err)
				}
			}
		}
	}

	addhosts := []string{}
	if _, found := r.URL.Query()["extrahosts"]; found {
		if err := json.Unmarshal([]byte(query.AddHosts), &addhosts); err != nil {
			utils.BadRequest(w, "extrahosts", query.AddHosts, err)
			return
		}
	}

	compression := archive.Compression(query.Compression)

	// convert dropcaps formats
	var dropCaps = []string{}
	if _, found := r.URL.Query()["dropcaps"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.DropCapabilities), &m); err != nil {
			utils.BadRequest(w, "dropcaps", query.DropCapabilities, err)
			return
		}
		dropCaps = m
	}

	// convert devices formats
	var devices = []string{}
	if _, found := r.URL.Query()["devices"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.Devices), &m); err != nil {
			utils.BadRequest(w, "devices", query.Devices, err)
			return
		}
		devices = m
	}

	var dnsservers = []string{}
	if _, found := r.URL.Query()["dnsservers"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.DNSServers), &m); err != nil {
			utils.BadRequest(w, "dnsservers", query.DNSServers, err)
			return
		}
		dnsservers = m
	}

	var dnsoptions = []string{}
	if _, found := r.URL.Query()["dnsoptions"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.DNSOptions), &m); err != nil {
			utils.BadRequest(w, "dnsoptions", query.DNSOptions, err)
			return
		}
		dnsoptions = m
	}

	var dnssearch = []string{}
	if _, found := r.URL.Query()["dnssearch"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.DNSSearch), &m); err != nil {
			utils.BadRequest(w, "dnssearches", query.DNSSearch, err)
			return
		}
		dnssearch = m
	}

	var secrets = []string{}
	if _, found := r.URL.Query()["secrets"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.Secrets), &m); err != nil {
			utils.BadRequest(w, "secrets", query.Secrets, err)
			return
		}

		// for podman-remote all secrets must be picked from context director
		// hence modify src so contextdir is added as prefix

		for _, secret := range m {
			secretOpt := strings.Split(secret, ",")
			if len(secretOpt) > 0 {
				modifiedOpt := []string{}
				for _, token := range secretOpt {
					arr := strings.SplitN(token, "=", 2)
					if len(arr) > 1 {
						if arr[0] == "src" {
							/* move secret away from contextDir */
							/* to make sure we dont accidentally commit temporary secrets to image*/
							builderDirectory, _ := filepath.Split(contextDirectory)
							// following path is outside build context
							newSecretPath := filepath.Join(builderDirectory, arr[1])
							oldSecretPath := filepath.Join(contextDirectory, arr[1])
							err := os.Rename(oldSecretPath, newSecretPath)
							if err != nil {
								utils.BadRequest(w, "secrets", query.Secrets, err)
								return
							}

							modifiedSrc := fmt.Sprintf("src=%s", newSecretPath)
							modifiedOpt = append(modifiedOpt, modifiedSrc)
						} else {
							modifiedOpt = append(modifiedOpt, token)
						}
					}
				}
				secrets = append(secrets, strings.Join(modifiedOpt[:], ","))
			}
		}
	}

	var output string
	if len(tags) > 0 {
		possiblyNormalizedName, err := utils.NormalizeToDockerHub(r, tags[0])
		if err != nil {
			utils.Error(w, http.StatusInternalServerError, errors.Wrap(err, "error normalizing image"))
			return
		}
		output = possiblyNormalizedName
	}
	format := buildah.Dockerv2ImageManifest
	registry := query.Registry
	isolation := buildah.IsolationDefault
	if utils.IsLibpodRequest(r) {
		var err error
		isolation, err = parseLibPodIsolation(query.Isolation)
		if err != nil {
			utils.Error(w, http.StatusInternalServerError, errors.Wrap(err, "failed to parse isolation"))
			return
		}

		// make sure to force rootless as rootless otherwise buildah runs code which is intended to be run only as root.
		if isolation == buildah.IsolationOCI && rootless.IsRootless() {
			isolation = buildah.IsolationOCIRootless
		}
		registry = ""
		format = query.OutputFormat
	} else {
		if _, found := r.URL.Query()["isolation"]; found {
			if query.Isolation != "" && query.Isolation != "default" {
				logrus.Debugf("invalid `isolation` parameter: %q", query.Isolation)
			}
		}
	}
	var additionalTags []string // nolint
	for i := 1; i < len(tags); i++ {
		possiblyNormalizedTag, err := utils.NormalizeToDockerHub(r, tags[i])
		if err != nil {
			utils.Error(w, http.StatusInternalServerError, errors.Wrap(err, "error normalizing image"))
			return
		}
		additionalTags = append(additionalTags, possiblyNormalizedTag)
	}

	var buildArgs = map[string]string{}
	if _, found := r.URL.Query()["buildargs"]; found {
		if err := json.Unmarshal([]byte(query.BuildArgs), &buildArgs); err != nil {
			utils.BadRequest(w, "buildargs", query.BuildArgs, err)
			return
		}
	}

	var excludes = []string{}
	if _, found := r.URL.Query()["excludes"]; found {
		if err := json.Unmarshal([]byte(query.Excludes), &excludes); err != nil {
			utils.BadRequest(w, "excludes", query.Excludes, err)
			return
		}
	}

	// convert annotations formats
	var annotations = []string{}
	if _, found := r.URL.Query()["annotations"]; found {
		if err := json.Unmarshal([]byte(query.Annotations), &annotations); err != nil {
			utils.BadRequest(w, "annotations", query.Annotations, err)
			return
		}
	}

	// convert nsoptions formats
	nsoptions := buildah.NamespaceOptions{}
	if _, found := r.URL.Query()["nsoptions"]; found {
		if err := json.Unmarshal([]byte(query.NamespaceOptions), &nsoptions); err != nil {
			utils.BadRequest(w, "nsoptions", query.NamespaceOptions, err)
			return
		}
	} else {
		nsoptions = append(nsoptions, buildah.NamespaceOption{
			Name: string(specs.NetworkNamespace),
			Host: true,
		})
	}
	// convert label formats
	var labels = []string{}
	if _, found := r.URL.Query()["labels"]; found {
		makeLabels := make(map[string]string)
		err := json.Unmarshal([]byte(query.Labels), &makeLabels)
		if err == nil {
			for k, v := range makeLabels {
				labels = append(labels, k+"="+v)
			}
		} else {
			if err := json.Unmarshal([]byte(query.Labels), &labels); err != nil {
				utils.BadRequest(w, "labels", query.Labels, err)
				return
			}
		}
	}

	jobs := 1
	if _, found := r.URL.Query()["jobs"]; found {
		jobs = query.Jobs
	}

	var (
		labelOpts = []string{}
		seccomp   string
		apparmor  string
	)

	if utils.IsLibpodRequest(r) {
		seccomp = query.Seccomp
		apparmor = query.AppArmor
		// convert labelopts formats
		if _, found := r.URL.Query()["labelopts"]; found {
			var m = []string{}
			if err := json.Unmarshal([]byte(query.LabelOpts), &m); err != nil {
				utils.BadRequest(w, "labelopts", query.LabelOpts, err)
				return
			}
			labelOpts = m
		}
	} else {
		// handle security-opt
		if _, found := r.URL.Query()["securityopt"]; found {
			var securityOpts = []string{}
			if err := json.Unmarshal([]byte(query.SecurityOpt), &securityOpts); err != nil {
				utils.BadRequest(w, "securityopt", query.SecurityOpt, err)
				return
			}
			for _, opt := range securityOpts {
				if opt == "no-new-privileges" {
					utils.BadRequest(w, "securityopt", query.SecurityOpt, errors.New("no-new-privileges is not supported"))
					return
				}
				con := strings.SplitN(opt, "=", 2)
				if len(con) != 2 {
					utils.BadRequest(w, "securityopt", query.SecurityOpt, errors.Errorf("Invalid --security-opt name=value pair: %q", opt))
					return
				}

				switch con[0] {
				case "label":
					labelOpts = append(labelOpts, con[1])
				case "apparmor":
					apparmor = con[1]
				case "seccomp":
					seccomp = con[1]
				default:
					utils.BadRequest(w, "securityopt", query.SecurityOpt, errors.Errorf("Invalid --security-opt 2: %q", opt))
					return
				}
			}
		}
	}

	// convert ulimits formats
	var ulimits = []string{}
	if _, found := r.URL.Query()["ulimits"]; found {
		var m = []string{}
		if err := json.Unmarshal([]byte(query.Ulimits), &m); err != nil {
			utils.BadRequest(w, "ulimits", query.Ulimits, err)
			return
		}
		ulimits = m
	}

	pullPolicy := buildahDefine.PullIfMissing
	if utils.IsLibpodRequest(r) {
		pullPolicy = buildahDefine.PolicyMap[query.PullPolicy]
	} else {
		if _, found := r.URL.Query()["pull"]; found {
			if query.Pull {
				pullPolicy = buildahDefine.PullAlways
			}
		}
	}

	creds, authfile, err := auth.GetCredentials(r)
	if err != nil {
		// Credential value(s) not returned as their value is not human readable
		utils.Error(w, http.StatusBadRequest, err)
		return
	}
	defer auth.RemoveAuthfile(authfile)

	fromImage := query.From
	if fromImage != "" {
		possiblyNormalizedName, err := utils.NormalizeToDockerHub(r, fromImage)
		if err != nil {
			utils.Error(w, http.StatusInternalServerError, errors.Wrap(err, "error normalizing image"))
			return
		}
		fromImage = possiblyNormalizedName
	}

	systemContext := &types.SystemContext{
		AuthFilePath:     authfile,
		DockerAuthConfig: creds,
	}
	utils.PossiblyEnforceDockerHub(r, systemContext)

	// Channels all mux'ed in select{} below to follow API build protocol
	stdout := channel.NewWriter(make(chan []byte))
	defer stdout.Close()

	auxout := channel.NewWriter(make(chan []byte))
	defer auxout.Close()

	stderr := channel.NewWriter(make(chan []byte))
	defer stderr.Close()

	reporter := channel.NewWriter(make(chan []byte))
	defer reporter.Close()

	runtime := r.Context().Value(api.RuntimeKey).(*libpod.Runtime)
	buildOptions := buildahDefine.BuildOptions{
		AddCapabilities: addCaps,
		AdditionalTags:  additionalTags,
		Annotations:     annotations,
		Args:            buildArgs,
		AllPlatforms:    query.AllPlatforms,
		CommonBuildOpts: &buildah.CommonBuildOptions{
			AddHost:            addhosts,
			ApparmorProfile:    apparmor,
			CPUPeriod:          query.CpuPeriod,
			CPUQuota:           query.CpuQuota,
			CPUSetCPUs:         query.CpuSetCpus,
			CPUSetMems:         query.CpuSetMems,
			CPUShares:          query.CpuShares,
			CgroupParent:       query.CgroupParent,
			DNSOptions:         dnsoptions,
			DNSSearch:          dnssearch,
			DNSServers:         dnsservers,
			HTTPProxy:          query.HTTPProxy,
			LabelOpts:          labelOpts,
			Memory:             query.Memory,
			MemorySwap:         query.MemSwap,
			SeccompProfilePath: seccomp,
			ShmSize:            strconv.Itoa(query.ShmSize),
			Ulimit:             ulimits,
			Secrets:            secrets,
		},
		Compression:                    compression,
		ConfigureNetwork:               parseNetworkConfigurationPolicy(query.ConfigureNetwork),
		ContextDirectory:               contextDirectory,
		Devices:                        devices,
		DropCapabilities:               dropCaps,
		Err:                            auxout,
		Excludes:                       excludes,
		ForceRmIntermediateCtrs:        query.ForceRm,
		From:                           fromImage,
		IgnoreUnrecognizedInstructions: query.Ignore,
		Isolation:                      isolation,
		Jobs:                           &jobs,
		Labels:                         labels,
		Layers:                         query.Layers,
		LogRusage:                      query.LogRusage,
		Manifest:                       query.Manifest,
		MaxPullPushRetries:             3,
		NamespaceOptions:               nsoptions,
		NoCache:                        query.NoCache,
		Out:                            stdout,
		Output:                         output,
		OutputFormat:                   format,
		PullPolicy:                     pullPolicy,
		PullPushRetryDelay:             time.Duration(2 * time.Second),
		Quiet:                          query.Quiet,
		Registry:                       registry,
		RemoveIntermediateCtrs:         query.Rm,
		ReportWriter:                   reporter,
		RusageLogFile:                  query.RusageLogFile,
		Squash:                         query.Squash,
		Target:                         query.Target,
		SystemContext:                  systemContext,
		UnsetEnvs:                      query.UnsetEnvs,
	}

	for _, platformSpec := range query.Platform {
		os, arch, variant, err := parse.Platform(platformSpec)
		if err != nil {
			utils.BadRequest(w, "platform", platformSpec, err)
			return
		}
		buildOptions.Platforms = append(buildOptions.Platforms, struct{ OS, Arch, Variant string }{
			OS:      os,
			Arch:    arch,
			Variant: variant,
		})
	}
	if _, found := r.URL.Query()["timestamp"]; found {
		ts := time.Unix(query.Timestamp, 0)
		buildOptions.Timestamp = &ts
	}

	var (
		imageID string
		success bool
	)

	runCtx, cancel := context.WithCancel(context.Background())
	go func() {
		defer cancel()
		imageID, _, err = runtime.Build(r.Context(), buildOptions, containerFiles...)
		if err == nil {
			success = true
		} else {
			stderr.Write([]byte(err.Error() + "\n"))
		}
	}()

	flush := func() {
		if flusher, ok := w.(http.Flusher); ok {
			flusher.Flush()
		}
	}

	// Send headers and prime client for stream to come
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusOK)
	flush()

	body := w.(io.Writer)
	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_*_server")
				defer t.Close()
				body = io.MultiWriter(t, w)
			}
		}
	}

	enc := json.NewEncoder(body)
	enc.SetEscapeHTML(true)

	for {
		m := struct {
			Stream string                 `json:"stream,omitempty"`
			Error  *jsonmessage.JSONError `json:"errorDetail,omitempty"`
			// NOTE: `error` is being deprecated check https://github.com/moby/moby/blob/master/pkg/jsonmessage/jsonmessage.go#L148
			ErrorMessage string          `json:"error,omitempty"` // deprecate this slowly
			Aux          json.RawMessage `json:"aux,omitempty"`
		}{}

		select {
		case e := <-stdout.Chan():
			m.Stream = string(e)
			if err := enc.Encode(m); err != nil {
				stderr.Write([]byte(err.Error()))
			}
			flush()
		case e := <-reporter.Chan():
			m.Stream = string(e)
			if err := enc.Encode(m); err != nil {
				stderr.Write([]byte(err.Error()))
			}
			flush()
		case e := <-auxout.Chan():
			m.Stream = string(e)
			if err := enc.Encode(m); err != nil {
				stderr.Write([]byte(err.Error()))
			}
			flush()
		case e := <-stderr.Chan():
			m.ErrorMessage = string(e)
			m.Error = &jsonmessage.JSONError{
				Message: m.ErrorMessage,
			}
			if err := enc.Encode(m); err != nil {
				logrus.Warnf("Failed to json encode error %v", err)
			}
			flush()
			return
		case <-runCtx.Done():
			if success {
				if !utils.IsLibpodRequest(r) && !query.Quiet {
					m.Aux = []byte(fmt.Sprintf(`{"ID":"sha256:%s"}`, imageID))
					if err := enc.Encode(m); err != nil {
						logrus.Warnf("failed to json encode error %v", err)
					}
					m.Aux = nil
					m.Stream = fmt.Sprintf("Successfully built %12.12s\n", imageID)
					if err := enc.Encode(m); err != nil {
						logrus.Warnf("Failed to json encode error %v", err)
					}
					flush()
					for _, tag := range tags {
						m.Stream = fmt.Sprintf("Successfully tagged %s\n", tag)
						if err := enc.Encode(m); err != nil {
							logrus.Warnf("Failed to json encode error %v", err)
						}
						flush()
					}
				}
			}
			flush()
			return
		case <-r.Context().Done():
			cancel()
			logrus.Infof("Client disconnect reported for build %q / %q.", registry, query.Dockerfile)
			return
		}
	}
}

func parseNetworkConfigurationPolicy(network string) buildah.NetworkConfigurationPolicy {
	if val, err := strconv.Atoi(network); err == nil {
		return buildah.NetworkConfigurationPolicy(val)
	}
	switch network {
	case "NetworkDefault":
		return buildah.NetworkDefault
	case "NetworkDisabled":
		return buildah.NetworkDisabled
	case "NetworkEnabled":
		return buildah.NetworkEnabled
	default:
		return buildah.NetworkDefault
	}
}

func parseLibPodIsolation(isolation string) (buildah.Isolation, error) { // nolint
	if val, err := strconv.Atoi(isolation); err == nil {
		return buildah.Isolation(val), nil
	}
	return parse.IsolationOption(isolation)
}

func extractTarFile(r *http.Request) (string, error) {
	// build a home for the request body
	anchorDir, err := ioutil.TempDir("", "libpod_builder")
	if err != nil {
		return "", err
	}

	path := filepath.Join(anchorDir, "tarBall")
	tarBall, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
	if err != nil {
		return "", err
	}
	defer tarBall.Close()

	// Content-Length not used as too many existing API clients didn't honor it
	_, err = io.Copy(tarBall, r.Body)
	r.Body.Close()
	if err != nil {
		return "", fmt.Errorf("failed Request: Unable to copy tar file from request body %s", r.RequestURI)
	}

	buildDir := filepath.Join(anchorDir, "build")
	err = os.Mkdir(buildDir, 0700)
	if err != nil {
		return "", err
	}

	_, _ = tarBall.Seek(0, 0)
	err = archive.Untar(tarBall, buildDir, nil)
	return buildDir, err
}