[timelion] Move grammar to package

.eslintignore

@@ -21,7 +21,6 @@ snapshots.js
 # plugin overrides
 /src/core/lib/kbn_internal_native_observable
 /src/plugins/data/common/es_query/kuery/ast/_generated_/**
-/src/plugins/vis_types/timelion/common/_generated_/**
 /x-pack/plugins/canvas/canvas_plugin
 /x-pack/plugins/canvas/shareable_runtime/build
 /x-pack/plugins/canvas/storybook/build

package.json

@@ -154,6 +154,7 @@
     "@kbn/server-http-tools": "link:bazel-bin/packages/kbn-server-http-tools",
     "@kbn/server-route-repository": "link:bazel-bin/packages/kbn-server-route-repository",
     "@kbn/std": "link:bazel-bin/packages/kbn-std",
+    "@kbn/timelion-grammar": "link:bazel-bin/packages/kbn-timelion-grammar",
     "@kbn/tinymath": "link:bazel-bin/packages/kbn-tinymath",
     "@kbn/typed-react-router-config": "link:bazel-bin/packages/kbn-typed-react-router-config",
     "@kbn/ui-framework": "link:bazel-bin/packages/kbn-ui-framework",

packages/BUILD.bazel

@@ -58,6 +58,7 @@ filegroup(
       "//packages/kbn-telemetry-tools:build",
       "//packages/kbn-test:build",
       "//packages/kbn-test-subj-selector:build",
+      "//packages/kbn-timelion-grammar:build",
       "//packages/kbn-tinymath:build",
       "//packages/kbn-typed-react-router-config:build",
       "//packages/kbn-ui-framework:build",

packages/kbn-timelion-grammar/BUILD.bazel

@@ -0,0 +1,46 @@
+load("@build_bazel_rules_nodejs//:index.bzl", "js_library", "pkg_npm")
+load("@npm//peggy:index.bzl", "peggy")
+
+PKG_BASE_NAME = "kbn-timelion-grammar"
+PKG_REQUIRE_NAME = "@kbn/timelion-grammar"
+
+NPM_MODULE_EXTRA_FILES = [
+  "package.json",
+]
+
+peggy(
+  name = "grammar",
+  data = [
+    ":grammar/chain.peggy"
+  ],
+  output_dir = True,
+  args = [
+    "-o",
+    "$(@D)/chain.js",
+    "./%s/grammar/chain.peggy" % package_name()
+  ],
+)
+
+js_library(
+  name = PKG_BASE_NAME,
+  srcs = NPM_MODULE_EXTRA_FILES + [
+    ":grammar"
+  ],
+  package_name = PKG_REQUIRE_NAME,
+  visibility = ["//visibility:public"],
+)
+
+pkg_npm(
+  name = "npm_module",
+  deps = [
+    ":%s" % PKG_BASE_NAME,
+  ]
+)
+
+filegroup(
+  name = "build",
+  srcs = [
+    ":npm_module",
+  ],
+  visibility = ["//visibility:public"],
+)

packages/kbn-timelion-grammar/package.json

@@ -0,0 +1,7 @@
+{
+    "name": "@kbn/timelion-grammar",
+    "version": "1.0.0",
+    "license": "SSPL-1.0 OR Elastic License 2.0",
+    "private": true,
+    "main": "grammar/chain.js"
+  }

src/plugins/vis_types/timelion/README.md

@@ -3,10 +3,4 @@
 Contains the timelion visualization and the timelion backend.
 
 # Generate a parser
-If your grammar was changed in `public/chain.peg` you need to re-generate the static parser. You could use a grunt task:
-
-```
-grunt peg:timelion_chain
-```
-
-The generated parser will be appeared at `public/_generated_` folder, which is included in `.eslintignore`
+If your grammar was changed in `packages/@kbn-timelion-grammar` you need to re-generate the static parser.  You can do this with `yarn kbn build`.