Move async and asyncReactive to sveltelib

- sveltelib is a lib for component-agnostic svelte utils

ts/graphs/BUILD.bazel

@@ -20,6 +20,7 @@ ts_library(
         "GraphsPage",
         "lib",
         "//ts/lib",
+        "//ts/sveltelib",
         "@npm//svelte",
         "@npm//svelte2tsx",
     ],
@@ -32,6 +33,7 @@ ts_library(
         exclude = ["index.ts"],
     ),
     deps = [
+        "//ts/sveltelib",
         "//ts/lib",
         "//ts/lib:backend_proto",
         "@npm//@types/d3",
@@ -59,6 +61,7 @@ esbuild(
     output_css = True,
     visibility = ["//visibility:public"],
     deps = [
+        "//ts/sveltelib",
         "//ts/lib",
         "//ts/lib:backend_proto",
         "//ts/lib:fluent_proto",

ts/graphs/WithGraphData.svelte

@@ -1,6 +1,6 @@
 <script lang="typescript">
-    import useAsync from "./async";
-    import useAsyncReactive from "./asyncReactive";
+    import useAsync from "sveltelib/async";
+    import useAsyncReactive from "sveltelib/asyncReactive";
 
     import { getGraphData, RevlogRange, daysToRevlogRange } from "./graph-helpers";
     import { getPreferences } from "./preferences";

ts/sveltelib/BUILD.bazel

@@ -0,0 +1,32 @@
+load("@npm//@bazel/typescript:index.bzl", "ts_library")
+load("//ts:prettier.bzl", "prettier_test")
+load("//ts:eslint.bzl", "eslint_test")
+
+# Anki Library
+################
+
+ts_library(
+    name = "sveltelib",
+    srcs = glob(["**/*.ts"]),
+    data = [],
+    module_name = "sveltelib",
+    tsconfig = "//:tsconfig.json",
+    visibility = ["//visibility:public"],
+    deps = [
+        "@npm//svelte",
+        "@npm//tslib",
+    ],
+)
+
+# Tests
+################
+
+prettier_test(
+    name = "format_check",
+    srcs = glob(["*.ts"]),
+)
+
+eslint_test(
+    name = "eslint",
+    srcs = glob(["*.ts"]),
+)

ts/tsconfig.json

@@ -6,7 +6,8 @@
         "lib": ["es2017", "es2019.array", "es2018.promise", "dom", "dom.iterable"],
         "baseUrl": ".",
         "paths": {
-            "anki/*": ["../bazel-bin/ts/lib/*"]
+            "anki/*": ["../bazel-bin/ts/lib/*"],
+            "sveltelib/*": ["../bazel-bin/ts/sveltelib/*"]
         },
         "importsNotUsedAsValues": "error",
         "outDir": "dist",