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Refactor: improve shell scripts #3843

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  • These changes aim to make the scripts more robust, easier to maintain, and more efficient while ensuring they follow the project's established coding patterns. (Please refer to the below key changes.)

  • e2e-k8s.sh
    Enhanced error handling by adding set -o pipefail.
    Improved code structure by extracting repeated tasks into functions.
    Added informative log messages for better execution tracking.
    Standardized variable usage to ${VARIABLE} format for consistency.
    Retained temporary directory creation and cleanup logic for better resource management.

  • push-latest-cli.sh
    Updated error handling to use set -o errexit -o nounset -o pipefail.
    Introduced an upload_file function to reduce code duplication.
    Implemented use of gsutil -m cp for parallel uploads to improve performance.
    Added log messages at key steps for clearer execution tracking.
    Standardized variable declarations using double quotes.

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  • ✅ login: namejsjeongkr / name: Jinsoo Jeong (ce1710d)

@k8s-ci-robot k8s-ci-robot added the cncf-cla: no Indicates the PR's author has not signed the CNCF CLA. label Jan 13, 2025
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Hi @namejsjeongkr. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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@k8s-ci-robot k8s-ci-robot added needs-ok-to-test Indicates a PR that requires an org member to verify it is safe to test. size/L Denotes a PR that changes 100-499 lines, ignoring generated files. cncf-cla: yes Indicates the PR's author has signed the CNCF CLA. and removed cncf-cla: no Indicates the PR's author has not signed the CNCF CLA. labels Jan 13, 2025
set -o errexit -o nounset -o xtrace

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I don't think all of the comments should be removed.

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I would prefer to keep usage documentation inline with the rest of the kubernetes project's scripts.

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What is the motivation for these changes? These scripts are used quite extensively, for some time now, without any known issues I'm aware of.

rm -rf "${TMP_DIR:?}"
fi
CLEANED_UP=true
if [ "${CLEANED_UP:-false}" = "true" ]; then
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There are a lot of unnecessary whitespace changes included that make this difficult to review.

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+1, and this script is used widely throughout CI so I'm not keen on sweeping changes without carefully reviewing.

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@BenTheElder BenTheElder left a comment

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Thanks, but this is hard to review with the large amount of unnecessary changes.

e2e-k8s.sh
Enhanced error handling by adding set -o pipefail.
Didn't happen? Also this script is written in POSIX shell (not bash, unlike most of thme) for wide-usage, which doesn't have pipefail. (note the shebang)

Improved code structure by extracting repeated tasks into functions.

... this is debatable, a lot of straightforward inline context was removed.

Introduced an upload_file function to reduce code duplication.

Invoking a command with a single flag and two call-site-specific arguments is hardly code duplication?

Implemented use of gsutil -m cp for parallel uploads to improve performance.

I'm doubtful that this is faster for these small files being uploaded one at a time, do we have evidence?
Anyhow we're not having a performance issue here, this script runs in automation and runtime is dominated by cloning and compiling. https://prow.k8s.io/job-history/gs/kubernetes-ci-logs/logs/post-kind-push-binaries

push-latest-cli.sh
Updated error handling to use set -o errexit -o nounset -o pipefail.
Huh? we already were?

Standardized variable declarations using double quotes.

Double quotes should only be used when expansion is being performed. Single quotes prevents accidental expansion (or unquoted when forming an array).

hack/release/build/cross.sh

# upload to the bucket
echo "Uploading to bucket: ${BUCKET}"
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logging should go to stderr, not stdout. also, I don't think we need all of this logging, it's a quick process, these are small files.

rm -rf "${TMP_DIR:?}"
fi
CLEANED_UP=true
if [ "${CLEANED_UP:-false}" = "true" ]; then
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+1, and this script is used widely throughout CI so I'm not keen on sweeping changes without carefully reviewing.

set -o errexit -o nounset -o xtrace

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I would prefer to keep usage documentation inline with the rest of the kubernetes project's scripts.

PARALLEL="${PARALLEL:-false}"

log() {
echo "[$(date +'%Y-%m-%d %H:%M:%S')] $*"
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I'm not sure if we want to do this, and this is a behavioral change, not a refactor

@@ -14,18 +14,25 @@
# limitations under the License.

set -o errexit -o nounset -o pipefail
set -x;
set -x
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this has no meaningful difference but /shrug

upload_file() {
local file="$1"
local version="$2"
gsutil -m cp -P "${file}" "gs://${BUCKET}/${version}/$(basename "${file}")"
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-m doesn't make sense for small, single file interactions?

And otherwise this was just gsutil cp -P <call site specific arguments> which is clearer inline, similar to cp -R ...

This seems over-abstracted

@@ -34,36 +41,42 @@ SHORT_COMMIT="${COMMIT:0:8}"
BUCKET="${BUCKET:-k8s-staging-kind}"
# under each of these
VERSIONS=(
latest
"${SHORT_COMMIT}"
"latest"
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these are arguments in an array, and we want the literal latest as a distinct word, quoting here is superfluous, as a literal it doesn't need double quotes

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