forgejo/vendor/github.com/mgechev/revive/rule/context-as-argument.go
Lunny Xiao 4f63f283c4
Rename scripts to build and add revive command as a new build tool command (#10942)
Co-authored-by: techknowlogick <techknowlogick@gitea.io>
2020-04-03 22:29:12 +03:00

61 lines
1.3 KiB
Go

package rule
import (
"go/ast"
"github.com/mgechev/revive/lint"
)
// ContextAsArgumentRule lints given else constructs.
type ContextAsArgumentRule struct{}
// Apply applies the rule to given file.
func (r *ContextAsArgumentRule) Apply(file *lint.File, _ lint.Arguments) []lint.Failure {
var failures []lint.Failure
fileAst := file.AST
walker := lintContextArguments{
file: file,
fileAst: fileAst,
onFailure: func(failure lint.Failure) {
failures = append(failures, failure)
},
}
ast.Walk(walker, fileAst)
return failures
}
// Name returns the rule name.
func (r *ContextAsArgumentRule) Name() string {
return "context-as-argument"
}
type lintContextArguments struct {
file *lint.File
fileAst *ast.File
onFailure func(lint.Failure)
}
func (w lintContextArguments) Visit(n ast.Node) ast.Visitor {
fn, ok := n.(*ast.FuncDecl)
if !ok || len(fn.Type.Params.List) <= 1 {
return w
}
// A context.Context should be the first parameter of a function.
// Flag any that show up after the first.
for _, arg := range fn.Type.Params.List[1:] {
if isPkgDot(arg.Type, "context", "Context") {
w.onFailure(lint.Failure{
Node: fn,
Category: "arg-order",
Failure: "context.Context should be the first parameter of a function",
Confidence: 0.9,
})
break // only flag one
}
}
return w
}