Deploy cloud-init script to S3 for following usage

tests/ci/worker/.gitignore

@@ -0,0 +1 @@
+generated_*init_runner.sh

tests/ci/worker/deploy-runner-init.sh

@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+
+usage() {
+  echo "Usage: $0 ENVIRONMENT" >&2
+  echo "Valid values for ENVIRONMENT: staging, production" >&2
+  exit 1
+}
+
+case "$1" in
+  staging|production)
+    ENVIRONMENT="$1" ;;
+  --help)
+    usage ;;
+  *)
+    echo "Invalid argument" >&2
+    usage ;;
+esac
+
+cd "$(dirname "$0")" || exit 1
+SOURCE_SCRIPT='init_runner.sh'
+
+check_response() {
+  # Are we even in the interactive shell?
+  [ -t 1 ] || return 1
+  local request
+  request="$1"
+  read -rp "$request (y/N): " response
+  case "$response" in
+    [Yy])
+      return 0
+      # Your code to continue goes here
+      ;;
+    *)
+      return 1
+      ;;
+  esac
+}
+
+check_dirty() {
+  if [ -n "$(git status --porcelain=v2 "$SOURCE_SCRIPT")" ]; then
+    echo "The $SOURCE_SCRIPT has uncommited changes, won't deploy it" >&2
+    exit 1
+  fi
+}
+GIT_HASH=$(git log -1 --format=format:%H)
+
+header() {
+  cat << EOF
+#!/usr/bin/env bash
+
+echo 'The $ENVIRONMENT script is generated from $SOURCE_SCRIPT, commit $GIT_HASH'
+
+EOF
+}
+
+body() {
+  local first_line
+  first_line=$(sed -n '/^# THE SCRIPT START$/{=;q}' "$SOURCE_SCRIPT")
+  if [ -z "$first_line" ]; then
+    echo "The pattern '# THE SCRIPT START' is not found in $SOURCE_SCRIPT" >&2
+    exit 1
+  fi
+  tail "+$first_line" "$SOURCE_SCRIPT"
+}
+
+GENERATED_FILE="generated_${ENVIRONMENT}_${SOURCE_SCRIPT}"
+
+{ header && body; } > "$GENERATED_FILE"
+
+echo "The file $GENERATED_FILE is generated"
+
+if check_response "Display the content of $GENERATED_FILE?"; then
+  if [ -z "$PAGER" ]; then
+    less "$GENERATED_FILE"
+  else
+    $PAGER "$GENERATED_FILE"
+  fi
+fi
+
+check_dirty
+
+S3_OBJECT=${S3_OBJECT:-s3://github-runners-data/cloud-init/${ENVIRONMENT}.sh}
+if check_response "Deploy the generated script to $S3_OBJECT?"; then
+  aws s3 mv "$GENERATED_FILE" "$S3_OBJECT"
+fi

tests/ci/worker/init_runner.sh

@@ -1,4 +1,43 @@
 #!/usr/bin/env bash
+
+cat > /dev/null << 'EOF'
+The following content is embedded into the s3 object via the script
+deploy-runner-init.sh {staging,production}
+with additional helping information
+
+In the `user data` you should define as the following
+with appropriate <ENVIRONMENT> as 'staging' or 'production':
+
+### COPY AFTER
+Content-Type: multipart/mixed; boundary="//"
+MIME-Version: 1.0
+
+--//
+Content-Type: text/cloud-config; charset="us-ascii"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="cloud-config.txt"
+
+#cloud-config
+cloud_final_modules:
+- [scripts-user, always]
+
+--//
+Content-Type: text/x-shellscript; charset="us-ascii"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Content-Disposition: attachment; filename="userdata.txt"
+
+#!/bin/bash
+aws s3 cp s3://github-runners-data/cloud-init/<ENVIRONMENT>.sh /tmp/cloud-init.sh
+chmod 0700 /tmp/cloud-init.sh
+exec bash /tmp/cloud-init.sh
+--//
+### COPY BEFORE
+EOF
+
+# THE SCRIPT START
+
 set -uo pipefail
 
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