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85 lines
2.2 KiB
85 lines
2.2 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"fmt"
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"os"
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"strconv"
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"time"
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chart "helm.sh/helm/v4/internal/chart/v3"
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)
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// ParseSourceDateEpoch reads the SOURCE_DATE_EPOCH environment variable and
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// returns the corresponding time. It returns the zero time when the variable
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// is not set or is set to the empty string. An error is returned when the
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// value cannot be parsed or is negative.
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//
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// SOURCE_DATE_EPOCH is a standardised environment variable for reproducible
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// builds; see https://reproducible-builds.org/docs/source-date-epoch/
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func ParseSourceDateEpoch() (time.Time, error) {
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v, ok := os.LookupEnv("SOURCE_DATE_EPOCH")
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if !ok || v == "" {
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return time.Time{}, nil
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}
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epoch, err := strconv.ParseInt(v, 10, 64)
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if err != nil {
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return time.Time{}, fmt.Errorf("invalid SOURCE_DATE_EPOCH %q: %w", v, err)
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}
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if epoch < 0 {
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return time.Time{}, fmt.Errorf("invalid SOURCE_DATE_EPOCH %q: negative value", v)
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}
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return time.Unix(epoch, 0), nil
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}
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// ApplySourceDateEpoch sets the ModTime on the chart and all of its entries
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// that currently have a zero ModTime to t. It recurses into dependencies.
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// When t is the zero time this is a no-op.
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func ApplySourceDateEpoch(c *chart.Chart, t time.Time) {
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if t.IsZero() {
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return
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}
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if c.ModTime.IsZero() {
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c.ModTime = t
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}
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if c.Lock != nil && c.Lock.Generated.IsZero() {
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c.Lock.Generated = t
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}
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if c.Schema != nil && c.SchemaModTime.IsZero() {
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c.SchemaModTime = t
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}
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for _, f := range c.Raw {
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if f.ModTime.IsZero() {
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f.ModTime = t
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}
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}
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for _, f := range c.Templates {
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if f.ModTime.IsZero() {
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f.ModTime = t
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}
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}
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for _, f := range c.Files {
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if f.ModTime.IsZero() {
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f.ModTime = t
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}
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}
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for _, dep := range c.Dependencies() {
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ApplySourceDateEpoch(dep, t)
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}
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}
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