1 files changed, 67 insertions, 0 deletions
diff --git a/vendor/github.com/mgechev/revive/rule/argument-limit.go b/vendor/github.com/mgechev/revive/rule/argument-limit.go
new file mode 100644
index 0000000000..2b11d49825
--- /dev/null
+++ b/vendor/github.com/mgechev/revive/rule/argument-limit.go
@@ -0,0 +1,67 @@
+package rule
+
+import (
+	"fmt"
+	"go/ast"
+
+	"github.com/mgechev/revive/lint"
+)
+
+// ArgumentsLimitRule lints given else constructs.
+type ArgumentsLimitRule struct{}
+
+// Apply applies the rule to given file.
+func (r *ArgumentsLimitRule) Apply(file *lint.File, arguments lint.Arguments) []lint.Failure {
+	if len(arguments) != 1 {
+		panic(`invalid configuration for "argument-limit"`)
+	}
+
+	total, ok := arguments[0].(int64) // Alt. non panicking version
+	if !ok {
+		panic(`invalid value passed as argument number to the "argument-list" rule`)
+	}
+
+	var failures []lint.Failure
+
+	walker := lintArgsNum{
+		total: int(total),
+		onFailure: func(failure lint.Failure) {
+			failures = append(failures, failure)
+		},
+	}
+
+	ast.Walk(walker, file.AST)
+
+	return failures
+}
+
+// Name returns the rule name.
+func (r *ArgumentsLimitRule) Name() string {
+	return "argument-limit"
+}
+
+type lintArgsNum struct {
+	total     int
+	onFailure func(lint.Failure)
+}
+
+func (w lintArgsNum) Visit(n ast.Node) ast.Visitor {
+	node, ok := n.(*ast.FuncDecl)
+	if ok {
+		num := 0
+		for _, l := range node.Type.Params.List {
+			for range l.Names {
+				num++
+			}
+		}
+		if num > w.total {
+			w.onFailure(lint.Failure{
+				Confidence: 1,
+				Failure:    fmt.Sprintf("maximum number of arguments per function exceeded; max %d but got %d", w.total, num),
+				Node:       node.Type,
+			})
+			return w
+		}
+	}
+	return w
+}