mirror of
https://codeberg.org/forgejo/forgejo
synced 2024-12-11 22:11:58 +01:00
69 lines
1.6 KiB
Go
69 lines
1.6 KiB
Go
|
package rule
|
||
|
|
||
|
import (
|
||
|
"fmt"
|
||
|
"go/ast"
|
||
|
|
||
|
"github.com/mgechev/revive/lint"
|
||
|
)
|
||
|
|
||
|
// FunctionResultsLimitRule lints given else constructs.
|
||
|
type FunctionResultsLimitRule struct{}
|
||
|
|
||
|
// Apply applies the rule to given file.
|
||
|
func (r *FunctionResultsLimitRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
|
||
|
if len(arguments) != 1 {
|
||
|
panic(`invalid configuration for "function-result-limit"`)
|
||
|
}
|
||
|
|
||
|
max, ok := arguments[0].(int64) // Alt. non panicking version
|
||
|
if !ok {
|
||
|
panic(fmt.Sprintf(`invalid value passed as return results number to the "function-result-limit" rule; need int64 but got %T`, arguments[0]))
|
||
|
}
|
||
|
if max < 0 {
|
||
|
panic(`the value passed as return results number to the "function-result-limit" rule cannot be negative`)
|
||
|
}
|
||
|
|
||
|
var failures []lint.Failure
|
||
|
|
||
|
walker := lintFunctionResultsNum{
|
||
|
max: int(max),
|
||
|
onFailure: func(failure lint.Failure) {
|
||
|
failures = append(failures, failure)
|
||
|
},
|
||
|
}
|
||
|
|
||
|
ast.Walk(walker, file.AST)
|
||
|
|
||
|
return failures
|
||
|
}
|
||
|
|
||
|
// Name returns the rule name.
|
||
|
func (r *FunctionResultsLimitRule) Name() string {
|
||
|
return "function-result-limit"
|
||
|
}
|
||
|
|
||
|
type lintFunctionResultsNum struct {
|
||
|
max int
|
||
|
onFailure func(lint.Failure)
|
||
|
}
|
||
|
|
||
|
func (w lintFunctionResultsNum) Visit(n ast.Node) ast.Visitor {
|
||
|
node, ok := n.(*ast.FuncDecl)
|
||
|
if ok {
|
||
|
num := 0
|
||
|
if node.Type.Results != nil {
|
||
|
num = node.Type.Results.NumFields()
|
||
|
}
|
||
|
if num > w.max {
|
||
|
w.onFailure(lint.Failure{
|
||
|
Confidence: 1,
|
||
|
Failure: fmt.Sprintf("maximum number of return results per function exceeded; max %d but got %d", w.max, num),
|
||
|
Node: node.Type,
|
||
|
})
|
||
|
return w
|
||
|
}
|
||
|
}
|
||
|
return w
|
||
|
}
|