Add git-on-borg repo to README (#482)
diff --git a/README.md b/README.md
index 7b10e33..337ddb6 100644
--- a/README.md
+++ b/README.md
@@ -1,95 +1 @@
-# Flutter LUCI Service Configurations
-
-Contains configuration and tools related to Flutter's build infrastructure.
-
-Configuration is generated by `lucicfg`, which is part of `depot_tools`. Rather
-than updating the individual .cfg files, updates should be made to
-`config/main.star`. That file can then be run to regenerate the configuration.
-
-## Updating the configuration
-
-- Edit the desired `.star` files (do not edit `.cfg` files; those are generated).
-- Execute `./config/main.star`.
-- Observe that the `.cfg` files have been updated (e.g. via `git status`).
-- Create a pull request containing changes both to the `.star` files and `.cfg` files.
-- Review and submit the pull request as normal.
-- Changes propagate to LUCI automatically. Go to [LUCI config UI][3]
- to check that new changes have been applied.
-
-## Adding new framework test shards
-
-This section talks about test shards defined in [dev/bots/test.dart][1] used to
-split framework tests into smaller chunks that can be tested in parallel. This
-does _not_ refer to [LUCI/Swarming][4] shards.
-
-When you add a new shard it does not automatically run in LUCI. To add it to
-LUCI you need to add a new builder in the [framework_config.star][2]. Typically,
-you'll add two builders, one "try" builder that tests PRs, and one "prod" builder
-that tests submitted PRs on the master branch.
-
-Here's an example of a "try" builder:
-
-```
- common.linux_try_builder(
- name = "Linux web_tests|web_tests",
- recipe = "flutter/flutter",
- repo = repos.FLUTTER,
- list_view_name = list_view_name,
- properties = {
- "shard": "web_tests",
- "subshards": ["0", "1", "2", "3", "4", "5", "6", "7_last"],
- "dependencies": [{"dependency": "android_sdk"}, {"dependency": "chrome_and_driver"}, {"dependency": "goldctl"}],
- },
- caches = [
- swarming.cache(name = "pub_cache", path = ".pub_cache"),
- swarming.cache(name = "android_sdk", path = "android29"),
- ],
- )
-```
-
-The easiest way to add a new one is to copy an existing builder and tweak the
-parameters.
-
-### Testing new shards
-
-As of today, it is not possible to test configuration changes until after they
-propagated to LUCI. One way to mitigate the risk of breakage is to run your test
-shard using an existing builder. To do that, find a builder in one of the
-`.star` files (e.g. `framework_config.star`) that satisfies the dependencies of
-the new test shard, then use the `led` tool (bundled with `depot_tools`) to run
-it.
-
-For example, let's say you are adding an integration test shard for web, and the
-new shard needs a Linux builder with Chrome and ChromeDriver in order to run.
-Luckily, there's already the `Linux web_tests` builder that satisfies these
-dependencies. To test the new shard, use the `Linux web_tests` builder, but ask
-it to run a different shards and/or subshard. Let's say the new test shard is
-called "foo", it has 3 subshards (0, 1, 2_last) and it's currently staged in pull
-request 99999. You can run it using the following `led` command:
-
-```
-led get-builder "luci.flutter.try:Linux web_tests" \
- | led edit -pa git_ref='refs/pull/99999/head' \
- | led edit -pa git_url='https://github.com/flutter/flutter' \
- | led edit -pa shard='foo' \
- | led edit -pa subshard='1' \
- | led launch
-```
-
-## Forcing the propagation of these configurations
-
-Configuration changes are read by the LUCI Configuration Service from
-[a git-on-borg mirror](https://chromium.googlesource.com/external/github.com/flutter/infra/)
-of this repo. Both the github -> googlesource mirroring and luci-config reading
-updated changes happen as scheduled tasks.
-
-Once a change has reached the mirror, one may speed up the propagation of the
-new configuration files by visiting the
-[luci-config web ui][3], logging in, and
-searching for projects/flutter. from there, one may click on the
-projects/flutter search result and click the download icon to force an update.
-
-[1]: https://github.com/flutter/flutter/blob/master/dev/bots/test.dart
-[2]: https://github.com/flutter/infra/blob/master/config/framework_config.star
-[3]: https://luci-config.appspot.com/#/projects/flutter
-[4]: https://www.chromium.org/developers/testing/isolated-testing/infrastructure
+# This repo has moved to https://flutter.googlesource.com/infra
