Attempt to automate PR creation for PGO profile data updates.

This will probably not work, but not much of a better way than to just try.

PiperOrigin-RevId: 761299081

Author: EtiennePerot

.buildkite/hooks/environment

@@ -0,0 +1,13 @@
+set -euo pipefail
+
+# Do not echo!
+set +x
+
+export GH_TOKEN="${GITHUB_AGENT_TOKEN:-TOKEN_IS_NOT_SET}"
+if [[ "${GH_TOKEN}" == 'TOKEN_IS_NOT_SET' ]]; then
+  echo "[debug] GH_TOKEN is unset ('TOKEN_IS_NOT_SET')." >&2
+elif [[ -z "${GH_TOKEN}" ]]; then
+  echo "[debug] GH_TOKEN is set but empty." >&2
+else
+  echo "[debug] GH_TOKEN is not empty." >&2
+fi

.buildkite/pgo.yaml

@@ -26,10 +26,22 @@ steps:
       - make ARCH=x86_64 benchmark-refresh-pgo BENCHMARKS_PLATFORMS=systrap
       - '
         if [[ "$(git status --porcelain | wc -l)" -gt 0 ]]; then
+          today="$(date +"%Y-%m-%d")" &&
+          pgo_branch_name="pgo-update-${today}" &&
+          git stash &&
           git pull --rebase=true https://github.com/google/gvisor master &&
+          git checkout -b "$pgo_branch_name" &&
           git add runsc/profiles &&
-          git commit -m "Update runsc profiles for PGO (profile-guided optimizations)." &&
-          git push [email protected]:google/gvisor.git "pgo-update-$(date +"%Y%m%d-%H:%M:%S")";
+          git status &&
+          gh auth login &&
+          gh auth setup-git &&
+          export GIT_AUTHOR_NAME=gvisor-bot &&
+          export [email protected] &&
+          export GIT_COMMITTER_NAME=gvisor-bot &&
+          export [email protected] &&
+          git commit -m "Update runsc profiles for PGO (profile-guided optimizations), $today." &&
+          git push --set-upstream [email protected]:google/gvisor.git "$pgo_branch_name" &&
+          gh pr create --title="Update runsc profiles for PGO (profile-guided optimizations), $today." --body="This PR updates the runsc profiles for PGO (profile-guided optimizations)." --label=pgo-update --base=master;
         else
           echo "No changes to runsc profiles." >&2;
         fi