Repository navigation
Expand file tree
/
Copy pathutil.go
More file actions
392 lines (348 loc) · 9.6 KB
/
Copy pathutil.go
File metadata and controls
392 lines (348 loc) · 9.6 KB
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
// Copyright (c) 2013 The Go Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd.
// Package lintutil provides helpers for writing linter command lines.
package lintutil // import "honnef.co/go/tools/lint/lintutil"
import (
"crypto/sha256"
"errors"
"flag"
"fmt"
"go/build"
"go/token"
"io"
"log"
"os"
"os/signal"
"regexp"
"runtime"
"runtime/pprof"
"strconv"
"strings"
"sync/atomic"
"honnef.co/go/tools/config"
"honnef.co/go/tools/internal/cache"
"honnef.co/go/tools/lint"
"honnef.co/go/tools/lint/lintutil/format"
"honnef.co/go/tools/version"
"golang.org/x/tools/go/analysis"
"golang.org/x/tools/go/buildutil"
"golang.org/x/tools/go/packages"
)
func NewVersionFlag() flag.Getter {
tags := build.Default.ReleaseTags
v := tags[len(tags)-1][2:]
version := new(VersionFlag)
if err := version.Set(v); err != nil {
panic(fmt.Sprintf("internal error: %s", err))
}
return version
}
type VersionFlag int
func (v *VersionFlag) String() string {
return fmt.Sprintf("1.%d", *v)
}
func (v *VersionFlag) Set(s string) error {
if len(s) < 3 {
return errors.New("invalid Go version")
}
if s[0] != '1' {
return errors.New("invalid Go version")
}
if s[1] != '.' {
return errors.New("invalid Go version")
}
i, err := strconv.Atoi(s[2:])
*v = VersionFlag(i)
return err
}
func (v *VersionFlag) Get() interface{} {
return int(*v)
}
func usage(name string, flags *flag.FlagSet) func() {
return func() {
fmt.Fprintf(os.Stderr, "Usage of %s:\n", name)
fmt.Fprintf(os.Stderr, "\t%s [flags] # runs on package in current directory\n", name)
fmt.Fprintf(os.Stderr, "\t%s [flags] packages\n", name)
fmt.Fprintf(os.Stderr, "\t%s [flags] directory\n", name)
fmt.Fprintf(os.Stderr, "\t%s [flags] files... # must be a single package\n", name)
fmt.Fprintf(os.Stderr, "Flags:\n")
flags.PrintDefaults()
}
}
type list []string
func (list *list) String() string {
return `"` + strings.Join(*list, ",") + `"`
}
func (list *list) Set(s string) error {
if s == "" {
*list = nil
return nil
}
*list = strings.Split(s, ",")
return nil
}
func FlagSet(name string) *flag.FlagSet {
flags := flag.NewFlagSet("", flag.ExitOnError)
flags.Usage = usage(name, flags)
flags.String("tags", "", "List of `build tags`")
flags.Bool("tests", true, "Include tests")
flags.Bool("version", false, "Print version and exit")
flags.Bool("show-ignored", false, "Don't filter ignored problems")
flags.String("f", "text", "Output `format` (valid choices are 'stylish', 'text' and 'json')")
flags.String("explain", "", "Print description of `check`")
flags.String("debug.cpuprofile", "", "Write CPU profile to `file`")
flags.String("debug.memprofile", "", "Write memory profile to `file`")
flags.Bool("debug.version", false, "Print detailed version information about this program")
flags.Bool("debug.no-compile-errors", false, "Don't print compile errors")
checks := list{"inherit"}
fail := list{"all"}
flags.Var(&checks, "checks", "Comma-separated list of `checks` to enable.")
flags.Var(&fail, "fail", "Comma-separated list of `checks` that can cause a non-zero exit status.")
tags := build.Default.ReleaseTags
v := tags[len(tags)-1][2:]
version := new(VersionFlag)
if err := version.Set(v); err != nil {
panic(fmt.Sprintf("internal error: %s", err))
}
flags.Var(version, "go", "Target Go `version` in the format '1.x'")
return flags
}
func findCheck(cs []*analysis.Analyzer, check string) (*analysis.Analyzer, bool) {
for _, c := range cs {
if c.Name == check {
return c, true
}
}
return nil, false
}
func ProcessFlagSet(cs []*analysis.Analyzer, cums []lint.CumulativeChecker, fs *flag.FlagSet) {
tags := fs.Lookup("tags").Value.(flag.Getter).Get().(string)
tests := fs.Lookup("tests").Value.(flag.Getter).Get().(bool)
goVersion := fs.Lookup("go").Value.(flag.Getter).Get().(int)
formatter := fs.Lookup("f").Value.(flag.Getter).Get().(string)
printVersion := fs.Lookup("version").Value.(flag.Getter).Get().(bool)
showIgnored := fs.Lookup("show-ignored").Value.(flag.Getter).Get().(bool)
explain := fs.Lookup("explain").Value.(flag.Getter).Get().(string)
cpuProfile := fs.Lookup("debug.cpuprofile").Value.(flag.Getter).Get().(string)
memProfile := fs.Lookup("debug.memprofile").Value.(flag.Getter).Get().(string)
debugVersion := fs.Lookup("debug.version").Value.(flag.Getter).Get().(bool)
debugNoCompile := fs.Lookup("debug.no-compile-errors").Value.(flag.Getter).Get().(bool)
cfg := config.Config{}
cfg.Checks = *fs.Lookup("checks").Value.(*list)
exit := func(code int) {
if cpuProfile != "" {
pprof.StopCPUProfile()
}
if memProfile != "" {
f, err := os.Create(memProfile)
if err != nil {
panic(err)
}
runtime.GC()
pprof.WriteHeapProfile(f)
}
os.Exit(code)
}
if cpuProfile != "" {
f, err := os.Create(cpuProfile)
if err != nil {
log.Fatal(err)
}
pprof.StartCPUProfile(f)
}
if debugVersion {
version.Verbose()
exit(0)
}
<
8000
div id="LC186" class="react-file-line html-div" data-testid="code-cell" data-line-number="186" style="position:relative">
if printVersion {
version.Print()
exit(0)
}
// Validate that the tags argument is well-formed. go/packages
// doesn't detect malformed build flags and returns unhelpful
// errors.
tf := buildutil.TagsFlag{}
if err := tf.Set(tags); err != nil {
fmt.Fprintln(os.Stderr, fmt.Errorf("invalid value %q for flag -tags: %s", tags, err))
exit(1)
}
if explain != "" {
var haystack []*analysis.Analyzer
haystack = append(haystack, cs...)
for _, cum := range cums {
haystack = append(haystack, cum.Analyzer())
}
check, ok := findCheck(haystack, explain)
if !ok {
fmt.Fprintln(os.Stderr, "Couldn't find check", explain)
exit(1)
}
if check.Doc == "" {
fmt.Fprintln(os.Stderr, explain, "has no documentation")
exit(1)
}
fmt.Println(check.Doc)
exit(0)
}
ps, err := Lint(cs, cums, fs.Args(), &Options{
Tags: tags,
LintTests: tests,
GoVersion: goVersion,
Config: cfg,
})
if err != nil {
fmt.Fprintln(os.Stderr, err)
exit(1)
}
var f format.Formatter
switch formatter {
case "text":
f = format.Text{W: os.Stdout}
case "stylish":
f = &format.Stylish{W: os.Stdout}
case "json":
f = format.JSON{W: os.Stdout}
default:
fmt.Fprintf(os.Stderr, "unsupported output format %q\n", formatter)
exit(2)
}
var (
total int
errors int
warnings int
)
fail := *fs.Lookup("fail").Value.(*list)
analyzers := make([]*analysis.Analyzer, len(cs), len(cs)+len(cums))
copy(analyzers, cs)
for _, cum := range cums {
analyzers = append(analyzers, cum.Analyzer())
}
shouldExit := lint.FilterChecks(analyzers, fail)
shouldExit["compile"] = true
total = len(ps)
for _, p := range ps {
if p.Check == "compile" && debugNoCompile {
continue
}
if p.Severity == lint.Ignored && !showIgnored {
continue
}
if shouldExit[p.Check] {
errors++
} else {
p.Severity = lint.Warning
warnings++
}
f.Format(p)
}
if f, ok := f.(format.Statter); ok {
f.Stats(total, errors, warnings)
}
if errors > 0 {
exit(1)
}
exit(0)
}
type Options struct {
Config config.Config
Tags string
LintTests bool
GoVersion int
}
func computeSalt() ([]byte, error) {
if version.Version != "devel" {
return []byte(version.Version), nil
}
p, err := os.Executable()
if err != nil {
return nil, err
}
f, err := os.Open(p)
if err != nil {
return nil, err
}
defer f.Close()
h := sha256.New()
if _, err := io.Copy(h, f); err != nil {
return nil, err
}
return h.Sum(nil), nil
}
func Lint(cs []*analysis.Analyzer, cums []lint.CumulativeChecker, paths []string, opt *Options) ([]lint.Problem, error) {
salt, err := computeSalt()
if err != nil {
return nil, fmt.Errorf("could not compute salt for cache: %s", err)
}
cache.SetSalt(salt)
if opt == nil {
opt = &Options{}
}
l := &lint.Linter{
Checkers: cs,
CumulativeCheckers: cums,
GoVersion: opt.GoVersion,
Config: opt.Config,
}
cfg := &packages.Config{}
if opt.LintTests {
cfg.Tests = true
}
if opt.Tags != "" {
cfg.BuildFlags = append(cfg.BuildFlags, "-tags", opt.Tags)
}
printStats := func() {
// Individual stats are read atomically, but overall there
// is no synchronisation. For printing rough progress
// information, this doesn't matter.
switch atomic.LoadUint32(&l.Stats.State) {
case lint.StateInitializing:
fmt.Fprintln(os.Stderr, "Status: initializing")
case lint.StateGraph:
fmt.Fprintln(os.Stderr, "Status: loading package graph")
case lint.StateProcessing:
fmt.Fprintf(os.Stderr, "Packages: %d/%d initial, %d/%d total; Workers: %d/%d; Problems: %d\n",
atomic.LoadUint32(&l.Stats.ProcessedInitialPackages),
atomic.LoadUint32(&l.Stats.InitialPackages),
atomic.LoadUint32(&l.Stats.ProcessedPackages),
atomic.LoadUint32(&l.Stats.TotalPackages),
atomic.LoadUint32(&l.Stats.ActiveWorkers),
atomic.LoadUint32(&l.Stats.TotalWorkers),
atomic.LoadUint32(&l.Stats.Problems),
)
case lint.StateCumulative:
fmt.Fprintln(os.Stderr, "Status: processing cumulative checkers")
}
}
if len(infoSignals) > 0 {
ch := make(chan os.Signal, 1)
signal.Notify(ch, infoSignals...)
defer signal.Stop(ch)
go func() {
for range ch {
printStats()
}
}()
}
return l.Lint(cfg, paths)
}
var posRe = regexp.MustCompile(`^(.+?):(\d+)(?::(\d+)?)?$`)
func parsePos(pos string) token.Position {
if pos == "-" || pos == "" {
return token.Position{}
}
parts := posRe.FindStringSubmatch(pos)
if parts == nil {
panic(fmt.Sprintf("internal error: malformed position %q", pos))
}
file := parts[1]
line, _ := strconv.Atoi(parts[2])
col, _ := strconv.Atoi(parts[3])
return token.Position{
Filename: file,
Line: line,
Column: col,
}
}