/
util.go
79 lines (73 loc) · 2.25 KB
/
util.go
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// Copyright 2018 Istio Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rules
import (
"go/ast"
"go/token"
"log"
"path/filepath"
"regexp"
"runtime"
"strings"
)
// GetCallerFileName returns filename of caller without file extension.
func GetCallerFileName() string {
if _, filename, _, ok := runtime.Caller(1); ok {
fnBase := filepath.Base(filename)
fn := strings.Split(fnBase, ".")
if len(fn) > 0 {
return fn[0]
}
} else {
log.Print("Unable to get filename for caller.")
}
return ""
}
// MatchCallExpr returns true if ce matches package name pn and method name mn.
func MatchCallExpr(ce *ast.CallExpr, pn string, mn string) bool {
if sel, ok := ce.Fun.(*ast.SelectorExpr); ok {
if pkg, ok := sel.X.(*ast.Ident); ok {
return pkg.String() == pn && sel.Sel.String() == mn
}
}
return false
}
// matchFuncArgs returns true if args in fcall matches argsR. argsR is regex.
func matchFuncArgs(fcall *ast.CallExpr, argsR string) bool {
if len(fcall.Args) == 1 && len(argsR) > 0 {
if blit, ok := fcall.Args[0].(*ast.BasicLit); ok {
if blit.Kind == token.STRING {
matched, _ := regexp.MatchString(argsR, blit.Value)
return matched
}
}
}
return false
}
// matchFunc returns true if bd matches packageName and methodName, and returns CallExpr
// element in bd for args check.
func matchFunc(bd ast.Stmt, packageName string, methodName string) (bool, *ast.CallExpr) {
if exprStmt, ok := bd.(*ast.ExprStmt); ok {
if call, ok := exprStmt.X.(*ast.CallExpr); ok {
if fun, ok := call.Fun.(*ast.SelectorExpr); ok {
if astid, ok := fun.X.(*ast.Ident); ok {
if astid.String() == packageName && fun.Sel.String() == methodName {
return true, call
}
}
}
}
}
return false, nil
}