github.com/elek/golangci-lint@v1.42.2-0.20211208090441-c05b7fcb3a9a/pkg/golinters/interfacer.go (about)

     1  package golinters
     2  
     3  import (
     4  	"sync"
     5  
     6  	"golang.org/x/tools/go/analysis"
     7  	"golang.org/x/tools/go/analysis/passes/buildssa"
     8  	"mvdan.cc/interfacer/check"
     9  
    10  	"github.com/elek/golangci-lint/pkg/golinters/goanalysis"
    11  	"github.com/elek/golangci-lint/pkg/lint/linter"
    12  	"github.com/elek/golangci-lint/pkg/result"
    13  )
    14  
    15  const interfacerName = "interfacer"
    16  
    17  func NewInterfacer() *goanalysis.Linter {
    18  	var mu sync.Mutex
    19  	var resIssues []goanalysis.Issue
    20  
    21  	analyzer := &analysis.Analyzer{
    22  		Name:     interfacerName,
    23  		Doc:      goanalysis.TheOnlyanalyzerDoc,
    24  		Requires: []*analysis.Analyzer{buildssa.Analyzer},
    25  	}
    26  	return goanalysis.NewLinter(
    27  		interfacerName,
    28  		"Linter that suggests narrower interface types",
    29  		[]*analysis.Analyzer{analyzer},
    30  		nil,
    31  	).WithContextSetter(func(lintCtx *linter.Context) {
    32  		analyzer.Run = func(pass *analysis.Pass) (interface{}, error) {
    33  			ssa := pass.ResultOf[buildssa.Analyzer].(*buildssa.SSA)
    34  			ssaPkg := ssa.Pkg
    35  			c := &check.Checker{}
    36  			prog := goanalysis.MakeFakeLoaderProgram(pass)
    37  			c.Program(prog)
    38  			c.ProgramSSA(ssaPkg.Prog)
    39  
    40  			issues, err := c.Check()
    41  			if err != nil {
    42  				return nil, err
    43  			}
    44  			if len(issues) == 0 {
    45  				return nil, nil
    46  			}
    47  
    48  			res := make([]goanalysis.Issue, 0, len(issues))
    49  			for _, i := range issues {
    50  				pos := pass.Fset.Position(i.Pos())
    51  				res = append(res, goanalysis.NewIssue(&result.Issue{
    52  					Pos:        pos,
    53  					Text:       i.Message(),
    54  					FromLinter: interfacerName,
    55  				}, pass))
    56  			}
    57  
    58  			mu.Lock()
    59  			resIssues = append(resIssues, res...)
    60  			mu.Unlock()
    61  
    62  			return nil, nil
    63  		}
    64  	}).WithIssuesReporter(func(*linter.Context) []goanalysis.Issue {
    65  		return resIssues
    66  	}).WithLoadMode(goanalysis.LoadModeTypesInfo)
    67  }