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Source file src/github.com/chaos-mesh/chaos-mesh/pkg/expr/expr.go

Documentation: github.com/chaos-mesh/chaos-mesh/pkg/expr

     1  // Copyright 2021 Chaos Mesh 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  
    16  package expr
    17  
    18  import (
    19  	"github.com/antonmedv/expr"
    20  	"github.com/pkg/errors"
    21  )
    22  
    23  func EvalBool(expression string, env map[string]interface{}) (bool, error) {
    24  	eval, err := expr.Eval(expression, env)
    25  	if err != nil {
    26  		return false, err
    27  	}
    28  	result, ok := eval.(bool)
    29  	if !ok {
    30  		return false, errors.New("expression result is not boolean")
    31  	}
    32  	return result, nil
    33  }
    34