What is Flag Sync?

Flag Sync is a tool to allow engineers to quickly introduce or disable flags on remote client systems. Currently, this is used to enable or disable certain Bazel flags across user workstations or CI hosts.

Basic usage

Prerequisites

Make sure you have valid AWS admin credentials for devprod-build. aws configure sso is the easiest way to do so.

Get list of flags for a namespace

bazel run //tools/flag_sync:client flag get "{namespace}"

Create a flag

bazel run //tools/flag_sync:client flag create "{namespace}" "{flag_name}" "{flag_value}"

Toggle flag on/off

bazel run //tools/flag_sync:client flag toggle-off "{namespace}" "{flag_name}" bazel run //tools/flag_sync:client flag toggle-on "{namespace}" "{flag_name}"

Delete a flag

bazel run //tools/flag_sync:client flag delete "{namespace}" "{flag_name}"

Namespaces

• user-prod - Namespace for flags to be synced with user workstations.
• ci-prod - Namespace for flags to be synced with CI hosts.

Example

Enable --config=local for users.

Create a new config local flag under the user-prod namespace: bazel run //tools/flag_sync:client flag create "user-prod" "local" "common --config=local"

If the flag exists already, you can simple run: bazel run //tools/flag_sync:client flag toggle-on "user-prod" "local"