github.com/GoogleContainerTools/skaffold@v1.39.18/pkg/skaffold/tag/date_time.go (about)

     1  /*
     2  Copyright 2019 The Skaffold Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package tag
    18  
    19  import (
    20  	"context"
    21  	"fmt"
    22  	"time"
    23  
    24  	"4d63.com/tz"
    25  
    26  	"github.com/GoogleContainerTools/skaffold/pkg/skaffold/schema/latest"
    27  )
    28  
    29  const tagTime = "2006-01-02_15-04-05.999_MST"
    30  
    31  // dateTimeTagger tags an image by the timestamp of the built image
    32  // dateTimeTagger implements Tagger
    33  type dateTimeTagger struct {
    34  	Format   string
    35  	TimeZone string
    36  	timeFn   func() time.Time
    37  }
    38  
    39  // NewDateTimeTagger creates a tagger from a date format and timezone.
    40  func NewDateTimeTagger(format, timezone string) Tagger {
    41  	return &dateTimeTagger{
    42  		Format:   format,
    43  		TimeZone: timezone,
    44  		timeFn:   time.Now,
    45  	}
    46  }
    47  
    48  // GenerateTag generates a tag using the current timestamp.
    49  func (t *dateTimeTagger) GenerateTag(ctx context.Context, image latest.Artifact) (string, error) {
    50  	format := tagTime
    51  	if len(t.Format) > 0 {
    52  		format = t.Format
    53  	}
    54  
    55  	timezone := "Local"
    56  	if len(t.TimeZone) > 0 {
    57  		timezone = t.TimeZone
    58  	}
    59  
    60  	loc, err := tz.LoadLocation(timezone)
    61  	if err != nil {
    62  		return "", fmt.Errorf("bad timezone provided: %q, error: %s", timezone, err)
    63  	}
    64  
    65  	return t.timeFn().In(loc).Format(format), nil
    66  }