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archive: use 1970-01-01 as the whiteout timestamp

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The whiteout timestamps are no longer set to the source date epoch.
The source date epoch still applies to non-whiteout files.

Discussion happened in moby/buildkit PR 3560.

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit is contained in:
Akihiro Suda
2023-06-30 11:26:53 +09:00
parent a542a57b2e
commit 5dedb6d0d2
5 changed files with 22 additions and 19 deletions
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diff/diff.go
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@@ -125,8 +125,11 @@ func WithPayloads(payloads map[string]typeurl.Any) ApplyOpt {
}
}
// WithSourceDateEpoch specifies the timestamp used for whiteouts to provide control for reproducibility.
// WithSourceDateEpoch specifies the timestamp used to provide control for reproducibility.
// See also https://reproducible-builds.org/docs/source-date-epoch/ .
//
// Since containerd v2.0, the whiteout timestamps are set to zero (1970-01-01),
// not to the source date epoch.
func WithSourceDateEpoch(tm *time.Time) Opt {
return func(c *Config) error {
c.SourceDateEpoch = tm