golangci-lint/pkg/golinters/whitespace.go
2019-09-23 12:16:06 -04:00

72 lines
1.9 KiB
Go

package golinters
import (
"context"
"go/token"
"github.com/pkg/errors"
"github.com/golangci/golangci-lint/pkg/lint/linter"
"github.com/golangci/golangci-lint/pkg/result"
"github.com/ultraware/whitespace"
)
type Whitespace struct {
}
func (Whitespace) Name() string {
return "whitespace"
}
func (Whitespace) Desc() string {
return "Tool for detection of leading and trailing whitespace"
}
func (w Whitespace) Run(ctx context.Context, lintCtx *linter.Context) ([]result.Issue, error) {
settings := whitespace.Settings{MultiIf: lintCtx.Cfg.LintersSettings.Whitespace.MultiIf}
var issues []whitespace.Message
for _, file := range lintCtx.ASTCache.GetAllValidFiles() {
issues = append(issues, whitespace.Run(file.F, file.Fset, settings)...)
}
if len(issues) == 0 {
return nil, nil
}
res := make([]result.Issue, len(issues))
for k, i := range issues {
issue := result.Issue{
Pos: token.Position{
Filename: i.Pos.Filename,
Line: i.Pos.Line,
},
LineRange: &result.Range{From: i.Pos.Line, To: i.Pos.Line},
Text: i.Message,
FromLinter: w.Name(),
Replacement: &result.Replacement{},
}
bracketLine, err := lintCtx.LineCache.GetLine(issue.Pos.Filename, issue.Pos.Line)
if err != nil {
return nil, errors.Wrapf(err, "failed to get line %s:%d", issue.Pos.Filename, issue.Pos.Line)
}
switch i.Type {
case whitespace.MessageTypeLeading:
issue.LineRange.To++ // cover two lines by the issue: opening bracket "{" (issue.Pos.Line) and following empty line
case whitespace.MessageTypeTrailing:
issue.LineRange.From-- // cover two lines by the issue: closing bracket "}" (issue.Pos.Line) and preceding empty line
issue.Pos.Line-- // set in sync with LineRange.From to not break fixer and other code features
case whitespace.MessageTypeAddAfter:
bracketLine += "\n"
}
issue.Replacement.NewLines = []string{bracketLine}
res[k] = issue
}
return res, nil
}