updated pre-commit config and readme

.pre-commit-hooks.yaml

@@ -1,7 +1,15 @@
-# How to use pre-commit hook: https://pre-commit.com
 - id: jsonnet-format
-  name: Format fix for jsonnet/libsonnet files
+  name: jsonnetfmt
-  entry: jsonnetfmt -i
+  description: Automatically format jsonnet files.
+  entry: jsonnetfmt
+  args: [-i]
   language: golang
-  files: '\.(jsonnet|libsonnet)$'
+  files: \.(jsonnet|libsonnet)$
-  additional_dependencies: [ "github.com/google/go-jsonnet/cmd/jsonnetfmt" ]
+  minimum_pre_commit_version: 2.10.1
+- id: jsonnet-lint
+  name: jsonnet-lint
+  description: Lint jsonnet files.
+  entry: jsonnet-lint
+  language: golang
+  files: \.(jsonnet|libsonnet)$
+  minimum_pre_commit_version: 2.10.1

README.md

@@ -25,6 +25,15 @@ It's also available on Homebrew:
 brew install go-jsonnet
 ```
 
+`jsonnetfmt` and `jsonnet-lint` are also available as [pre-commit](https://github.com/pre-commit/pre-commit) hooks. Example `.pre-commit-config.yaml`:
+```yaml
+- repo: https://github.com/google/go-jsonnet
+  rev: # ref you want to point at, e.g. v0.17.0
+  hooks:
+    - id: jsonnet-format
+    - id: jsonnet-lint
+```
+
 ## Build instructions (go 1.11+)
 
 ```bash