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Code Issues Releases Activity

add SOURCE_DATE_EPOCH usage (#72)

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zxxa 2019-08-17 00:50:39 +08:00 committed by jonjohnsonjr
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@ -124,7 +124,6 @@ However, these same commands can be directed to operate locally as well via
the `--local` or `-L` command (or setting `KO_DOCKER_REPO=ko.local`). See
the [`minikube` section](./README.md#with-minikube) for more detail.
### `ko publish`
`ko publish` simply builds and publishes images for each import path passed as
@ -441,6 +440,14 @@ This resulting configuration may then be installed onto Kubernetes clusters via:
kubectl apply -f release.yaml
```
### Why are my images all created in 1970?
In order to support [reproducible builds](https://reproducible-builds.org), `ko` doesn't embed timestamps in the images it produces by default; however, `ko` does respect the [`SOURCE_DATE_EPOCH`](https://reproducible-builds.org/docs/source-date-epoch/) environment variable.
For example, you can set this to the current timestamp by executing:
export SOURCE_DATE_EPOCH=`date +%s
or to the latest git commit's timestamp with:
export SOURCE_DATE_EPOCH=$(git log -1 --format='%ct')
## Acknowledgements