forked from peak/s5cmd
-
Notifications
You must be signed in to change notification settings - Fork 0
/
complete.go
285 lines (243 loc) · 7.14 KB
/
complete.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
package complete
import (
"context"
"errors"
"flag"
"math"
"runtime"
"strconv"
"strings"
"time"
"github.com/peakgames/s5cmd/core"
"github.com/peakgames/s5cmd/opt"
"github.com/peakgames/s5cmd/url"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/s3"
cmp "github.com/posener/complete"
)
const (
s3CompletionTimeout = 5 * time.Second
s3MaxKeys = 20
s3MaxPages = 1
)
// ParseFlagsAndRun will initialize shell-completion, and introduce the shell completion specific options. It also calls flag.Parse()
func ParseFlagsAndRun() (bool, error) {
doInstall := flag.Bool("cmp-install", false, "Install shell completion")
doUninstall := flag.Bool("cmp-uninstall", false, "Uninstall shell completion")
completer := cmp.Command{
Flags: cmp.Flags{
"-f": cmp.PredictOr(cmp.PredictSet("-"), cmp.PredictFiles("*")),
"-numworkers": cmp.PredictFunc(func(a cmp.Args) []string {
// add some sensible defaults...
ret := []string{"-1", "-2", "-4"}
nc := float64(runtime.NumCPU())
if nc > 1 {
ret = append(ret, strconv.Itoa(int(math.Floor(nc/2))))
}
if nc > 4 {
ret = append(ret, strconv.Itoa(int(math.Floor(nc/4))))
}
return ret
}),
"-cs": cmp.PredictSet("5", "16", "64", "128", "256"),
"-dlp": cmp.PredictSet("5", "16", "64", "128", "256"),
"-dlw": cmp.PredictSet("5", "8", "16", "32", "64"),
"-cmp-install": cmp.PredictSet("assume-yes"),
"-cmp-uninstall": cmp.PredictSet("assume-yes"),
"-h": cmp.PredictNothing,
"-r": cmp.PredictSet("0", "1", "2", "10", "100"),
"-stats": cmp.PredictNothing,
"-ulw": cmp.PredictSet("5", "8", "16", "32", "64"),
"-version": cmp.PredictNothing,
"-gops": cmp.PredictNothing,
"-vv": cmp.PredictNothing,
},
Sub: getSubCommands(),
}
flag.Parse()
cc := cmp.New("s5cmd", completer)
if *doInstall && *doUninstall {
return false, errors.New("Install and uninstall are mutually exclusive")
} else if *doInstall || *doUninstall {
return true, setupCompletion(*doInstall)
}
return cc.Run(), nil
}
// getSubCommands returns a command vs. flag list for shell completion. It merges each Keyword and its flags into a single list.
func getSubCommands() cmp.Commands {
ret := make(cmp.Commands)
// map of command Keyword vs. flags
flagList := make(map[string]*map[string]struct{})
// map of command Keyword vs. arg types
argList := make(map[string]*map[opt.ParamType]struct{})
for _, c := range core.Commands {
if c.Operation.IsInternal() {
continue
}
// Do the flags
flagsForKeyword, ok := flagList[c.Keyword]
if !ok {
tmp := make(map[string]struct{})
flagsForKeyword = &tmp
flagList[c.Keyword] = flagsForKeyword
}
for _, o := range *(c.Operation.GetAcceptedOpts()) {
optName := o.GetParam()
if optName == "" {
continue
}
(*flagsForKeyword)[optName] = struct{}{}
}
// Now the args
argsForKeyword, ok := argList[c.Keyword]
if !ok {
tmp := make(map[opt.ParamType]struct{})
argsForKeyword = &tmp
argList[c.Keyword] = argsForKeyword
}
for _, p := range c.Params {
(*argsForKeyword)[p] = struct{}{}
}
if _, ok = ret[c.Keyword]; !ok {
ret[c.Keyword] = cmp.Command{}
}
}
// Set the flags
for kw, v := range flagList {
flgs := make(cmp.Flags)
for flagVal := range *v {
flgs[flagVal] = cmp.PredictNothing // our subcommand flags are always boolean
}
c := ret[kw]
c.Flags = flgs
ret[kw] = c
}
// Now the args
for kw, v := range argList {
predictorList := make([]cmp.Predictor, 0)
addedS3predictor := false
for ptype := range *v {
switch ptype {
case opt.FileObj:
predictorList = append(predictorList, cmp.PredictFiles("*"))
case opt.Dir, opt.OptionalDir:
predictorList = append(predictorList, cmp.PredictDirs("*"))
case opt.FileOrDir, opt.OptionalFileOrDir:
predictorList = append(predictorList, cmp.PredictFiles("*"), cmp.PredictDirs("*"))
case opt.Glob:
fallthrough
case opt.Unchecked:
fallthrough
case opt.UncheckedOneOrMore:
predictorList = append(predictorList, cmp.PredictAnything)
case opt.S3Dir:
fallthrough
case opt.S3Obj:
fallthrough
case opt.S3ObjOrDir:
fallthrough
case opt.S3SimpleObj:
fallthrough
case opt.S3WildObj:
if !addedS3predictor {
predictorList = append(predictorList, cmp.PredictFunc(s3predictor))
addedS3predictor = true
}
}
}
c := ret[kw]
c.Args = cmp.PredictOr(predictorList...)
ret[kw] = c
}
return ret
}
func s3predictor(a cmp.Args) []string {
if a.Last == "" || a.Last == "s3" || a.Last == "s3:" || a.Last == "s3:/" {
// Return more than one match so that after "s5cmd ls s3<tab>" completes to s3://, double <tab> lists the buckets without the need for a backspace
return []string{"s3://a-bucket", "s3://my-bucket"}
}
if !strings.HasPrefix(a.Last, "s3://") {
return nil
}
var s3bucket, s3key string
var endsInSlash bool
if a.Last == "s3://" {
s3bucket = ""
s3key = ""
} else {
s3u, err := url.ParseS3Url(a.Last)
if err != nil {
return nil
}
s3bucket = s3u.Bucket
s3key = s3u.Key
endsInSlash = a.Last[len(a.Last)-1] == '/'
}
// Quickly create a new session with defaults
ses, err := core.NewAwsSession(-1, "")
if err != nil {
return nil
}
client := s3.New(ses)
ctx, canceler := context.WithTimeout(context.Background(), s3CompletionTimeout)
defer canceler() // avoid a leak and make go vet happy
// No object key and (no bucket or not ending in slash char): get S3 buckets
if s3key == "" && (s3bucket == "" || !endsInSlash) {
o, err := client.ListBucketsWithContext(ctx, &s3.ListBucketsInput{})
if err != nil {
return nil
}
var ret []string
for _, b := range o.Buckets {
if s3bucket == "" {
// Return a list of all buckets
ret = append(ret, "s3://"+*b.Name+"/")
} else {
// Check starts-with and only return matching buckets
if strings.HasPrefix(*b.Name, s3bucket) {
ret = append(ret, "s3://"+*b.Name+"/")
}
}
}
// if only 1 match, fall through and list objects in the bucket
if len(ret) != 1 {
return ret
}
s3bucket = strings.TrimRight(ret[0][5:], "/") // "s3://bucket/" to "bucket"
}
if s3bucket != "" {
// Override default region with bucket
ses, err := core.GetSessionForBucket(client, s3bucket)
if err == nil {
client = s3.New(ses)
}
var ret []string
prefix := "s3://" + s3bucket + "/"
page := 0
client.ListObjectsV2PagesWithContext(ctx, &s3.ListObjectsV2Input{
Bucket: &s3bucket,
Delimiter: aws.String("/"),
Prefix: &s3key,
MaxKeys: aws.Int64(s3MaxKeys),
}, func(o *s3.ListObjectsV2Output, lastPage bool) bool {
for _, p := range o.CommonPrefixes {
ret = append(ret, prefix+*p.Prefix)
}
for _, q := range o.Contents {
// Ignore the 0-byte "*_$folder$" objects in shell completion, created by s3n
if *q.Size == 0 && strings.HasSuffix(*q.Key, "_$folder$") {
continue
}
ret = append(ret, prefix+*q.Key)
}
page++
return page < s3MaxPages
})
// If no s3key given, add the bare bucket name to our results
if s3key == "" {
ret = append(ret, prefix)
}
return ret
}
return nil
}