API: Allow users to list records across results.

Follows the guidance of https://google.aip.dev/159 to allow ListResults
to read across results by specifying `-` as the Result name.

docs/api/filter.md → docs/api/README.md

@@ -1,26 +1,34 @@
-# Filtering
+# Results API
+
+## Filtering
 
 The reference implementation of the Results API uses
 [CEL](https://github.com/google/cel-spec/blob/master/doc/langdef.md) as a
 filtering spec. Filter specs expect a boolean result value.
 
 Known types exposed to each RPC method are documented below.
 
-## ListResults
+### ListResults
 
-| Known Types | Description                                     |
-| ----------- | ----------------------------------------------- |
+| Known Types | Description                                      |
+| ----------- | ------------------------------------------------ |
 | `result`    | [Result Object](/proto/v1alpha2/resources.proto) |
 
-## ListRecords
+### ListRecords
 
-| Known Types | Description                                     |
-| ----------- | ----------------------------------------------- |
+| Known Types | Description                                      |
+| ----------- | ------------------------------------------------ |
 | `record`    | [Record Object](/proto/v1alpha2/resources.proto) |
 
-### Cookbook
+#### Cookbook
 
 | Filter Spec                                            | Description                                           |
 | ------------------------------------------------------ | ----------------------------------------------------- |
 | `record.name.startsWith("foo/results/bar")`            | Get all Records belonging to Result `foo/results/bar` |
 | `type(record.data) == tekton.pipeline.v1beta1.TaskRun` | Get all Records of type TaskRun                       |
+
+## Reading Records across Results
+
+Records can be read across Results by specifying `-` as the Result name part
+(e.g. `default/results/-`). This can be used to read and filter matching Records
+without knowing the exact Result name.

go.mod

@@ -15,10 +15,8 @@ require (
 	github.com/onsi/ginkgo v1.14.1 // indirect
 	github.com/onsi/gomega v1.10.2 // indirect
 	github.com/sirupsen/logrus v1.7.0 // indirect
-	github.com/smartystreets/assertions v1.1.1 // indirect
 	github.com/stretchr/testify v1.6.1 // indirect
 	github.com/tektoncd/pipeline v0.17.1
-	go.chromium.org/luci v0.0.0-20200716065131-1f7c6da65cb2
 	go.uber.org/zap v1.15.0
 	golang.org/x/crypto v0.0.0-20201016220609-9e8e0b390897 // indirect
 	golang.org/x/mod v0.4.0 // indirect