label.go

Documentation: edge-infra.dev/pkg/f8n/devinfra/repo/owners/policybot/policy/predicate

     1  // Copyright 2020 Palantir Technologies, Inc.
     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 predicate
    16  
    17  import (
    18  	"context"
    19  	"strings"
    20  
    21  	"github.com/pkg/errors"
    22  
    23  	"edge-infra.dev/pkg/f8n/devinfra/repo/owners/policybot/pull"
    24  
    25  	"edge-infra.dev/pkg/f8n/devinfra/repo/owners/policybot/policy/common"
    26  )
    27  
    28  type HasLabels []string
    29  
    30  var _ Predicate = HasLabels([]string{})
    31  
    32  func (pred HasLabels) Evaluate(ctx context.Context, prctx pull.Context) (*common.PredicateResult, error) {
    33  
    34  	predicateResult := common.PredicateResult{
    35  		ValuePhrase:     "labels",
    36  		ConditionPhrase: "contain the labels",
    37  	}
    38  	if len(pred) > 0 {
    39  		labels, err := prctx.Labels()
    40  		if err != nil {
    41  			return nil, errors.Wrap(err, "failed to list pull request labels")
    42  		}
    43  		predicateResult.Values = labels
    44  		for _, requiredLabel := range pred {
    45  			if !contains(labels, strings.ToLower(requiredLabel)) {
    46  				predicateResult.ConditionValues = []string{requiredLabel}
    47  				predicateResult.Description = "Missing label: " + requiredLabel
    48  				predicateResult.Satisfied = false
    49  				return &predicateResult, nil
    50  			}
    51  		}
    52  	}
    53  	predicateResult.ConditionValues = pred
    54  	predicateResult.Satisfied = true
    55  	return &predicateResult, nil
    56  }
    57  
    58  func (pred HasLabels) Trigger() common.Trigger {
    59  	return common.TriggerLabel
    60  }
    61  
    62  func contains(elements []string, value string) bool {
    63  	for _, element := range elements {
    64  		if element == value {
    65  			return true
    66  		}
    67  	}
    68  	return false
    69  }
    70
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