github.com/zxy12/go_duplicate_112_new@v0.0.0-20200807091221-747231827200/src/cmd/go/internal/vet/vet.go (about)

     1  // Copyright 2011 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Package vet implements the ``go vet'' command.
     6  package vet
     7  
     8  import (
     9  	"cmd/go/internal/base"
    10  	"cmd/go/internal/load"
    11  	"cmd/go/internal/modload"
    12  	"cmd/go/internal/work"
    13  	"path/filepath"
    14  )
    15  
    16  var CmdVet = &base.Command{
    17  	Run:         runVet,
    18  	CustomFlags: true,
    19  	UsageLine:   "go vet [-n] [-x] [-vettool prog] [build flags] [vet flags] [packages]",
    20  	Short:       "report likely mistakes in packages",
    21  	Long: `
    22  Vet runs the Go vet command on the packages named by the import paths.
    23  
    24  For more about vet and its flags, see 'go doc cmd/vet'.
    25  For more about specifying packages, see 'go help packages'.
    26  For a list of checkers and their flags, see 'go tool vet help'.
    27  For details of a specific checker such as 'printf', see 'go tool vet help printf'.
    28  
    29  The -n flag prints commands that would be executed.
    30  The -x flag prints commands as they are executed.
    31  
    32  The -vettool=prog flag selects a different analysis tool with alternative
    33  or additional checks.
    34  For example, the 'shadow' analyzer can be built and run using these commands:
    35  
    36    go install golang.org/x/tools/go/analysis/passes/shadow/cmd/shadow
    37    go vet -vettool=$(which shadow)
    38  
    39  The build flags supported by go vet are those that control package resolution
    40  and execution, such as -n, -x, -v, -tags, and -toolexec.
    41  For more about these flags, see 'go help build'.
    42  
    43  See also: go fmt, go fix.
    44  	`,
    45  }
    46  
    47  func runVet(cmd *base.Command, args []string) {
    48  	modload.LoadTests = true
    49  
    50  	vetFlags, pkgArgs := vetFlags(vetUsage, args)
    51  
    52  	work.BuildInit()
    53  	work.VetFlags = vetFlags
    54  	if vetTool != "" {
    55  		var err error
    56  		work.VetTool, err = filepath.Abs(vetTool)
    57  		if err != nil {
    58  			base.Fatalf("%v", err)
    59  		}
    60  	}
    61  
    62  	pkgs := load.PackagesForBuild(pkgArgs)
    63  	if len(pkgs) == 0 {
    64  		base.Fatalf("no packages to vet")
    65  	}
    66  
    67  	var b work.Builder
    68  	b.Init()
    69  
    70  	root := &work.Action{Mode: "go vet"}
    71  	for _, p := range pkgs {
    72  		_, ptest, pxtest, err := load.TestPackagesFor(p, nil)
    73  		if err != nil {
    74  			base.Errorf("%v", err)
    75  			continue
    76  		}
    77  		if len(ptest.GoFiles) == 0 && len(ptest.CgoFiles) == 0 && pxtest == nil {
    78  			base.Errorf("go vet %s: no Go files in %s", p.ImportPath, p.Dir)
    79  			continue
    80  		}
    81  		if len(ptest.GoFiles) > 0 || len(ptest.CgoFiles) > 0 {
    82  			root.Deps = append(root.Deps, b.VetAction(work.ModeBuild, work.ModeBuild, ptest))
    83  		}
    84  		if pxtest != nil {
    85  			root.Deps = append(root.Deps, b.VetAction(work.ModeBuild, work.ModeBuild, pxtest))
    86  		}
    87  	}
    88  	b.Do(root)
    89  }