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Merge pull request #48708 from bmwiedemann/date

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Automatic merge from submit-queue (batch tested with PRs 49222, 49333, 48708, 49337)

Allow to override build date

See https://reproducible-builds.org/ for why this is good
and https://reproducible-builds.org/specs/source-date-epoch/
for the definition of this variable.

Background: issue #48710
when trying to build the kubernetes package
for the openSUSE Linux distribution
```
/usr/bin/hyperkube
/usr/bin/kubeadm
/usr/src/kubernetes/platforms/linux/amd64/e2e.test
```
had a date+time string embedded in them in the format
2018-08-15T19:08:34Z

which meant that each build produced new binaries
even when nothing actually changed.
Those then had to be synced to mirrors, wasting their and our users' bandwidth.
This commit is contained in:
Kubernetes Submit Queue 2017-07-20 23:01:21 -07:00 committed by GitHub
commit ab6f1f0da1
1 changed files with 3 additions and 1 deletions
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4
hack/lib/version.sh
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@ -130,7 +130,9 @@ kube::version::ldflag() {
kube::version::ldflags() {
kube::version::get_version_vars
local -a ldflags=($(kube::version::ldflag "buildDate" "$(date -u +'%Y-%m-%dT%H:%M:%SZ')"))
local buildDate=
[[ -z ${SOURCE_DATE_EPOCH-} ]] || buildDate="--date=@${SOURCE_DATE_EPOCH}"
local -a ldflags=($(kube::version::ldflag "buildDate" "$(date ${buildDate} -u +'%Y-%m-%dT%H:%M:%SZ')"))
if [[ -n ${KUBE_GIT_COMMIT-} ]]; then
ldflags+=($(kube::version::ldflag "gitCommit" "${KUBE_GIT_COMMIT}"))
ldflags+=($(kube::version::ldflag "gitTreeState" "${KUBE_GIT_TREE_STATE}"))