github.com/alecthomas/golangci-lint@v1.4.2-0.20180609094924-581a3564ff68/pkg/golinters/errcheck.go (about)

     1  package golinters
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  
     7  	"github.com/golangci/golangci-lint/pkg/lint/linter"
     8  	"github.com/golangci/golangci-lint/pkg/result"
     9  	errcheckAPI "github.com/kisielk/errcheck/golangci"
    10  )
    11  
    12  type Errcheck struct{}
    13  
    14  func (Errcheck) Name() string {
    15  	return "errcheck"
    16  }
    17  
    18  func (Errcheck) Desc() string {
    19  	return "Errcheck is a program for checking for unchecked errors in go programs. These unchecked errors can be critical bugs in some cases"
    20  }
    21  
    22  func (e Errcheck) Run(ctx context.Context, lintCtx *linter.Context) ([]result.Issue, error) {
    23  	errCfg := &lintCtx.Settings().Errcheck
    24  	issues, err := errcheckAPI.Run(lintCtx.Program, errCfg.CheckAssignToBlank, errCfg.CheckTypeAssertions)
    25  	if err != nil {
    26  		return nil, err
    27  	}
    28  
    29  	if len(issues) == 0 {
    30  		return nil, nil
    31  	}
    32  
    33  	res := make([]result.Issue, 0, len(issues))
    34  	for _, i := range issues {
    35  		var text string
    36  		if i.FuncName != "" {
    37  			text = fmt.Sprintf("Error return value of %s is not checked", formatCode(i.FuncName, lintCtx.Cfg))
    38  		} else {
    39  			text = "Error return value is not checked"
    40  		}
    41  		res = append(res, result.Issue{
    42  			FromLinter: e.Name(),
    43  			Text:       text,
    44  			Pos:        i.Pos,
    45  		})
    46  	}
    47  
    48  	return res, nil
    49  }