go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/lucicfg/validate.go (about)

     1  // Copyright 2020 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package lucicfg
    16  
    17  import (
    18  	"regexp"
    19  
    20  	"go.starlark.net/starlark"
    21  )
    22  
    23  func init() {
    24  	// Used in //internal/validate.star.
    25  	declNative("is_valid_regex", func(call nativeCall) (starlark.Value, error) {
    26  		var regexStr starlark.String
    27  		if err := call.unpack(1, &regexStr); err != nil {
    28  			return nil, err
    29  		}
    30  
    31  		_, err := regexp.Compile(regexStr.GoString())
    32  		errStr := ""
    33  		if err != nil {
    34  			errStr = err.Error()
    35  		}
    36  		return starlark.Tuple{starlark.Bool(err == nil), starlark.String(errStr)}, nil
    37  	})
    38  }