1 files changed, 74 insertions, 0 deletions
diff --git a/vendor/github.com/jirfag/go-printf-func-name/pkg/analyzer/analyzer.go b/vendor/github.com/jirfag/go-printf-func-name/pkg/analyzer/analyzer.go
new file mode 100644
index 000000000..7937dd433
--- /dev/null
+++ b/vendor/github.com/jirfag/go-printf-func-name/pkg/analyzer/analyzer.go
@@ -0,0 +1,74 @@
+package analyzer
+
+import (
+	"go/ast"
+	"strings"
+
+	"golang.org/x/tools/go/analysis/passes/inspect"
+	"golang.org/x/tools/go/ast/inspector"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var Analyzer = &analysis.Analyzer{
+	Name:     "goprintffuncname",
+	Doc:      "Checks that printf-like functions are named with `f` at the end.",
+	Run:      run,
+	Requires: []*analysis.Analyzer{inspect.Analyzer},
+}
+
+func run(pass *analysis.Pass) (interface{}, error) {
+	inspector := pass.ResultOf[inspect.Analyzer].(*inspector.Inspector)
+	nodeFilter := []ast.Node{
+		(*ast.FuncDecl)(nil),
+	}
+
+	inspector.Preorder(nodeFilter, func(node ast.Node) {
+		funcDecl := node.(*ast.FuncDecl)
+
+		if res := funcDecl.Type.Results; res != nil && len(res.List) != 0 {
+			return
+		}
+
+		params := funcDecl.Type.Params.List
+		if len(params) < 2 { // [0] must be format (string), [1] must be args (...interface{})
+			return
+		}
+
+		formatParamType, ok := params[len(params)-2].Type.(*ast.Ident)
+		if !ok { // first param type isn't identificator so it can't be of type "string"
+			return
+		}
+
+		if formatParamType.Name != "string" { // first param (format) type is not string
+			return
+		}
+
+		if formatParamNames := params[len(params)-2].Names; len(formatParamNames) == 0 || formatParamNames[len(formatParamNames)-1].Name != "format" {
+			return
+		}
+
+		argsParamType, ok := params[len(params)-1].Type.(*ast.Ellipsis)
+		if !ok { // args are not ellipsis (...args)
+			return
+		}
+
+		elementType, ok := argsParamType.Elt.(*ast.InterfaceType)
+		if !ok { // args are not of interface type, but we need interface{}
+			return
+		}
+
+		if elementType.Methods != nil && len(elementType.Methods.List) != 0 {
+			return // has >= 1 method in interface, but we need an empty interface "interface{}"
+		}
+
+		if strings.HasSuffix(funcDecl.Name.Name, "f") {
+			return
+		}
+
+		pass.Reportf(node.Pos(), "printf-like formatting function '%s' should be named '%sf'",
+			funcDecl.Name.Name, funcDecl.Name.Name)
+	})
+
+	return nil, nil
+}