-
Notifications
You must be signed in to change notification settings - Fork 1.9k
/
funcs.go
601 lines (515 loc) · 13.2 KB
/
funcs.go
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
package helper
import (
"crypto/sha512"
"fmt"
"path/filepath"
"reflect"
"regexp"
"strings"
"time"
multierror "github.com/hashicorp/go-multierror"
"github.com/hashicorp/hcl/hcl/ast"
)
// validUUID is used to check if a given string looks like a UUID
var validUUID = regexp.MustCompile(`(?i)^[\da-f]{8}-[\da-f]{4}-[\da-f]{4}-[\da-f]{4}-[\da-f]{12}$`)
// validInterpVarKey matches valid dotted variable names for interpolation. The
// string must begin with one or more non-dot characters which may be followed
// by sequences containing a dot followed by a one or more non-dot characters.
var validInterpVarKey = regexp.MustCompile(`^[^.]+(\.[^.]+)*$`)
// invalidFilename is the minimum set of characters which must be removed or
// replaced to produce a valid filename
var invalidFilename = regexp.MustCompile(`[/\\<>:"|?*]`)
// invalidFilenameNonASCII = invalidFilename plus all non-ASCII characters
var invalidFilenameNonASCII = regexp.MustCompile(`[[:^ascii:]/\\<>:"|?*]`)
// invalidFilenameStrict = invalidFilename plus additional punctuation
var invalidFilenameStrict = regexp.MustCompile(`[/\\<>:"|?*$()+=[\];#@~,&']`)
// IsUUID returns true if the given string is a valid UUID.
func IsUUID(str string) bool {
const uuidLen = 36
if len(str) != uuidLen {
return false
}
return validUUID.MatchString(str)
}
// IsValidInterpVariable returns true if a valid dotted variable names for
// interpolation. The string must begin with one or more non-dot characters
// which may be followed by sequences containing a dot followed by a one or more
// non-dot characters.
func IsValidInterpVariable(str string) bool {
return validInterpVarKey.MatchString(str)
}
// HashUUID takes an input UUID and returns a hashed version of the UUID to
// ensure it is well distributed.
func HashUUID(input string) (output string, hashed bool) {
if !IsUUID(input) {
return "", false
}
// Hash the input
buf := sha512.Sum512([]byte(input))
output = fmt.Sprintf("%08x-%04x-%04x-%04x-%12x",
buf[0:4],
buf[4:6],
buf[6:8],
buf[8:10],
buf[10:16])
return output, true
}
// BoolToPtr returns the pointer to a boolean.
func BoolToPtr(b bool) *bool {
return &b
}
// IntToPtr returns the pointer to an int
func IntToPtr(i int) *int {
return &i
}
// Int8ToPtr returns the pointer to an int8
func Int8ToPtr(i int8) *int8 {
return &i
}
// Int64ToPtr returns the pointer to an int
func Int64ToPtr(i int64) *int64 {
return &i
}
// Uint64ToPtr returns the pointer to an uint64
func Uint64ToPtr(u uint64) *uint64 {
return &u
}
// UintToPtr returns the pointer to an uint
func UintToPtr(u uint) *uint {
return &u
}
// StringToPtr returns the pointer to a string
func StringToPtr(str string) *string {
return &str
}
// TimeToPtr returns the pointer to a time.Duration.
func TimeToPtr(t time.Duration) *time.Duration {
return &t
}
// CompareTimePtrs return true if a is the same as b.
func CompareTimePtrs(a, b *time.Duration) bool {
if a == nil || b == nil {
return a == b
}
return *a == *b
}
// Float64ToPtr returns the pointer to an float64
func Float64ToPtr(f float64) *float64 {
return &f
}
func IntMin(a, b int) int {
if a < b {
return a
}
return b
}
func IntMax(a, b int) int {
if a > b {
return a
}
return b
}
func Uint64Max(a, b uint64) uint64 {
if a > b {
return a
}
return b
}
// MapStringStringSliceValueSet returns the set of values in a map[string][]string
func MapStringStringSliceValueSet(m map[string][]string) []string {
set := make(map[string]struct{})
for _, slice := range m {
for _, v := range slice {
set[v] = struct{}{}
}
}
flat := make([]string, 0, len(set))
for k := range set {
flat = append(flat, k)
}
return flat
}
func SliceStringToSet(s []string) map[string]struct{} {
m := make(map[string]struct{}, (len(s)+1)/2)
for _, k := range s {
m[k] = struct{}{}
}
return m
}
// SliceStringIsSubset returns whether the smaller set of strings is a subset of
// the larger. If the smaller slice is not a subset, the offending elements are
// returned.
func SliceStringIsSubset(larger, smaller []string) (bool, []string) {
largerSet := make(map[string]struct{}, len(larger))
for _, l := range larger {
largerSet[l] = struct{}{}
}
subset := true
var offending []string
for _, s := range smaller {
if _, ok := largerSet[s]; !ok {
subset = false
offending = append(offending, s)
}
}
return subset, offending
}
// SliceStringContains returns whether item exists at least once in list.
func SliceStringContains(list []string, item string) bool {
for _, s := range list {
if s == item {
return true
}
}
return false
}
// SliceStringHasPrefix returns true if any string in list starts with prefix
func SliceStringHasPrefix(list []string, prefix string) bool {
for _, s := range list {
if strings.HasPrefix(s, prefix) {
return true
}
}
return false
}
// StringHasPrefixInSlice returns true if string starts with any prefix in list
func StringHasPrefixInSlice(s string, prefixes []string) bool {
for _, prefix := range prefixes {
if strings.HasPrefix(s, prefix) {
return true
}
}
return false
}
func SliceSetDisjoint(first, second []string) (bool, []string) {
contained := make(map[string]struct{}, len(first))
for _, k := range first {
contained[k] = struct{}{}
}
offending := make(map[string]struct{})
for _, k := range second {
if _, ok := contained[k]; ok {
offending[k] = struct{}{}
}
}
if len(offending) == 0 {
return true, nil
}
flattened := make([]string, 0, len(offending))
for k := range offending {
flattened = append(flattened, k)
}
return false, flattened
}
// CompareSliceSetString returns true if the slices contain the same strings.
// Order is ignored. The slice may be copied but is never altered. The slice is
// assumed to be a set. Multiple instances of an entry are treated the same as
// a single instance.
func CompareSliceSetString(a, b []string) bool {
n := len(a)
if n != len(b) {
return false
}
// Copy a into a map and compare b against it
amap := make(map[string]struct{}, n)
for i := range a {
amap[a[i]] = struct{}{}
}
for i := range b {
if _, ok := amap[b[i]]; !ok {
return false
}
}
return true
}
// CompareMapStringString returns true if the maps are equivalent. A nil and
// empty map are considered not equal.
func CompareMapStringString(a, b map[string]string) bool {
if a == nil || b == nil {
return a == nil && b == nil
}
if len(a) != len(b) {
return false
}
for k, v := range a {
v2, ok := b[k]
if !ok {
return false
}
if v != v2 {
return false
}
}
// Already compared all known values in a so only test that keys from b
// exist in a
for k := range b {
if _, ok := a[k]; !ok {
return false
}
}
return true
}
// Below is helpers for copying generic structures.
func CopyMapStringString(m map[string]string) map[string]string {
l := len(m)
if l == 0 {
return nil
}
c := make(map[string]string, l)
for k, v := range m {
c[k] = v
}
return c
}
func CopyMapStringStruct(m map[string]struct{}) map[string]struct{} {
l := len(m)
if l == 0 {
return nil
}
c := make(map[string]struct{}, l)
for k := range m {
c[k] = struct{}{}
}
return c
}
func CopyMapStringInterface(m map[string]interface{}) map[string]interface{} {
l := len(m)
if l == 0 {
return nil
}
c := make(map[string]interface{}, l)
for k, v := range m {
c[k] = v
}
return c
}
func CopyMapStringInt(m map[string]int) map[string]int {
l := len(m)
if l == 0 {
return nil
}
c := make(map[string]int, l)
for k, v := range m {
c[k] = v
}
return c
}
func CopyMapStringFloat64(m map[string]float64) map[string]float64 {
l := len(m)
if l == 0 {
return nil
}
c := make(map[string]float64, l)
for k, v := range m {
c[k] = v
}
return c
}
// CopyMapStringSliceString copies a map of strings to string slices such as
// http.Header
func CopyMapStringSliceString(m map[string][]string) map[string][]string {
l := len(m)
if l == 0 {
return nil
}
c := make(map[string][]string, l)
for k, v := range m {
c[k] = CopySliceString(v)
}
return c
}
func CopySliceString(s []string) []string {
l := len(s)
if l == 0 {
return nil
}
c := make([]string, l)
copy(c, s)
return c
}
func CopySliceInt(s []int) []int {
l := len(s)
if l == 0 {
return nil
}
c := make([]int, l)
copy(c, s)
return c
}
// CleanEnvVar replaces all occurrences of illegal characters in an environment
// variable with the specified byte.
func CleanEnvVar(s string, r byte) string {
b := []byte(s)
for i, c := range b {
switch {
case c == '_':
case c == '.':
case c >= 'a' && c <= 'z':
case c >= 'A' && c <= 'Z':
case i > 0 && c >= '0' && c <= '9':
default:
// Replace!
b[i] = r
}
}
return string(b)
}
// CleanFilename replaces invalid characters in filename
func CleanFilename(filename string, replace string) string {
clean := invalidFilename.ReplaceAllLiteralString(filename, replace)
return clean
}
// CleanFilenameASCIIOnly replaces invalid and non-ASCII characters in filename
func CleanFilenameASCIIOnly(filename string, replace string) string {
clean := invalidFilenameNonASCII.ReplaceAllLiteralString(filename, replace)
return clean
}
// CleanFilenameStrict replaces invalid and punctuation characters in filename
func CleanFilenameStrict(filename string, replace string) string {
clean := invalidFilenameStrict.ReplaceAllLiteralString(filename, replace)
return clean
}
func CheckHCLKeys(node ast.Node, valid []string) error {
var list *ast.ObjectList
switch n := node.(type) {
case *ast.ObjectList:
list = n
case *ast.ObjectType:
list = n.List
default:
return fmt.Errorf("cannot check HCL keys of type %T", n)
}
validMap := make(map[string]struct{}, len(valid))
for _, v := range valid {
validMap[v] = struct{}{}
}
var result error
for _, item := range list.Items {
key := item.Keys[0].Token.Value().(string)
if _, ok := validMap[key]; !ok {
result = multierror.Append(result, fmt.Errorf(
"invalid key: %s", key))
}
}
return result
}
// UnusedKeys returns a pretty-printed error if any `hcl:",unusedKeys"` is not empty
func UnusedKeys(obj interface{}) error {
val := reflect.ValueOf(obj)
if val.Kind() == reflect.Ptr {
val = reflect.Indirect(val)
}
return unusedKeysImpl([]string{}, val)
}
func unusedKeysImpl(path []string, val reflect.Value) error {
stype := val.Type()
for i := 0; i < stype.NumField(); i++ {
ftype := stype.Field(i)
fval := val.Field(i)
tags := strings.Split(ftype.Tag.Get("hcl"), ",")
name := tags[0]
tags = tags[1:]
if fval.Kind() == reflect.Ptr {
fval = reflect.Indirect(fval)
}
// struct? recurse. Add the struct's key to the path
if fval.Kind() == reflect.Struct {
err := unusedKeysImpl(append([]string{name}, path...), fval)
if err != nil {
return err
}
continue
}
// Search the hcl tags for "unusedKeys"
unusedKeys := false
for _, p := range tags {
if p == "unusedKeys" {
unusedKeys = true
break
}
}
if unusedKeys {
ks, ok := fval.Interface().([]string)
if ok && len(ks) != 0 {
ps := ""
if len(path) > 0 {
ps = strings.Join(path, ".") + " "
}
return fmt.Errorf("%sunexpected keys %s",
ps,
strings.Join(ks, ", "))
}
}
}
return nil
}
// RemoveEqualFold removes the first string that EqualFold matches. It updates xs in place
func RemoveEqualFold(xs *[]string, search string) {
sl := *xs
for i, x := range sl {
if strings.EqualFold(x, search) {
sl = append(sl[:i], sl[i+1:]...)
if len(sl) == 0 {
*xs = nil
} else {
*xs = sl
}
return
}
}
}
// CheckNamespaceScope ensures that the provided namespace is equal to
// or a parent of the requested namespaces. Returns requested namespaces
// which are not equal to or a child of the provided namespace.
func CheckNamespaceScope(provided string, requested []string) []string {
var offending []string
for _, ns := range requested {
rel, err := filepath.Rel(provided, ns)
if err != nil {
offending = append(offending, ns)
// If relative path requires ".." it's not a child
} else if strings.Contains(rel, "..") {
offending = append(offending, ns)
}
}
if len(offending) > 0 {
return offending
}
return nil
}
// PathEscapesSandbox returns whether previously cleaned path inside the
// sandbox directory (typically this will be the allocation directory)
// escapes.
func PathEscapesSandbox(sandboxDir, path string) bool {
rel, err := filepath.Rel(sandboxDir, path)
if err != nil {
return true
}
if strings.HasPrefix(rel, "..") {
return true
}
return false
}
// StopFunc is used to stop a time.Timer created with NewSafeTimer
type StopFunc func()
// NewSafeTimer creates a time.Timer but does not panic if duration is <= 0.
//
// Using a time.Timer is recommended instead of time.After when it is necessary
// to avoid leaking goroutines (e.g. in a select inside a loop).
//
// Returns the time.Timer and also a StopFunc, forcing the caller to deal
// with stopping the time.Timer to avoid leaking a goroutine.
func NewSafeTimer(duration time.Duration) (*time.Timer, StopFunc) {
if duration <= 0 {
// Avoid panic by using the smallest positive value. This is close enough
// to the behavior of time.After(0), which this helper is intended to
// replace.
// https://go.dev/play/p/EIkm9MsPbHY
duration = 1
}
t := time.NewTimer(duration)
cancel := func() {
t.Stop()
}
return t, cancel
}