chore(utils): AS-822 codify GAR search scripts (#419)

Author: afoley587

utils/get-helm-chart-version.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+
+# Looks up the version of a dependent GAR artifact from
+# either the commit SHA or helm Chart.yaml version.
+# There are no inputs.
+# All echos happen to STDERR.
+# Result is the found version which can be captured with STDOUT.
+
+set -o pipefail
+set -eu
+
+version=""
+chart_ver=$(yq ".version" helm/fiftyone-teams-app/Chart.yaml)
+
+# Note: Sending echos to STDERR so that users can easily use
+# the STDOUT for other, more interesting automations.
+if [[ ${TEAMS_DEPLOYER_BRANCH} == "main" ]]; then
+  # Get the most recent <x.x.x> version from GAR
+  pattern="${chart_ver}"
+  echo "Look for version \"${pattern}\" in us-central1-docker.pkg.dev/computer-vision-team/helm-internal/internal-env" >&2
+  version=$(gcloud artifacts docker images list \
+    us-central1-docker.pkg.dev/computer-vision-team/helm-internal/internal-env \
+    --include-tags \
+    --format="value(tags)" \
+    --filter="tags:${pattern}" \
+    --sort-by createTime | grep -E '[0-9]+\.[0-9]+\.[0-9]+$$' | tail -1)
+else
+  # Look for the .*-<sha> in GAR.
+  # Handles both x.x.x-sha-<sha> and x.x.x-rc-<sha> formats
+
+  sha=$(git rev-parse --short HEAD)
+
+  echo "Look for version \"${sha}\" in us-central1-docker.pkg.dev/computer-vision-team/helm-internal/internal-env" >&2
+
+  version=$(gcloud artifacts docker images list \
+    us-central1-docker.pkg.dev/computer-vision-team/helm-internal/internal-env \
+    --include-tags \
+    --filter="tags ~ .*-${sha}\$" \
+    --format yaml \
+    --limit 1 |
+    yq ".tags[0]")
+fi
+
+if [[ -z ${version} ]] || [[ ! ${version} =~ [0-9]+\.[0-9]+\.[0-9]+.* ]]; then
+  echo "[ERROR] No version found in the helm chart registry... Failing build." >&2
+  echo "        Please submit a PR to fiftyone-teams-app-deploy if this is a " >&2
+  echo "        non-release branch so that your chart gets published." >&2
+  echo "        If this is a release branch, please view the " >&2
+  echo "        'Release Pre-release charts' action in fiftyone-teams-app-deploy" >&2
+  exit 1
+fi
+
+echo "Found internal-env chart version ${version}" >&2
+# Let caller do with it what they'd like
+echo "${version}"