Move cache directory to node_modules (#167)

* Move cache directory to node_modules

* Use find-cache-dir to find .cache in node_modules

.gitignore

@@ -1,7 +1,6 @@
 /node_modules
 /npm-debug.log
 /typings
-/.rpt2_cache
 /.vscode
 /.idea
 /build-self

README.md

@@ -134,9 +134,9 @@ See [#108](https://github.com/ezolenko/rollup-plugin-typescript2/issues/108)
 
 	Set to true for clean build (wipes out cache on every build).
 
-* `cacheRoot`: `./.rts2_cache`
+* `cacheRoot`: `node_modules/.cache/rollup-plugin-typescript2`
 
-	Path to cache. Defaults to a folder in the current directory. Can be safely moved out with something like `${require('temp-dir')}/.rpt2_cache`, but watch out for multiple concurrent builds of the same repo.
+	Path to cache. Defaults to a folder in node_modules.
 
 * `include`: `[ "*.ts+(|x)", "**/*.ts+(|x)" ]`
 

package.json

@@ -29,6 +29,7 @@
     "lint": "tslint -c ./tslint.json src/*.ts ./*.js"
   },
   "dependencies": {
+    "find-cache-dir": "^3.0.0",
     "fs-extra": "8.1.0",
     "resolve": "1.11.1",
     "rollup-pluginutils": "2.8.1",
@@ -40,6 +41,7 @@
   },
   "devDependencies": {
     "@types/colors": "1.2.1",
+    "@types/find-cache-dir": "^2.0.0",
     "@types/fs-extra": "8.0.0",
     "@types/graphlib": "2.1.5",
     "@types/lodash": "4.14.136",

src/index.ts

@@ -15,6 +15,7 @@ import { blue, red, yellow, green } from "colors/safe";
 import { dirname, isAbsolute, join, relative } from "path";
 import { normalize } from "./normalize";
 import { satisfies } from "semver";
+import findCacheDir from 'find-cache-dir';
 
 import { PluginImpl, PluginContext, InputOptions, OutputOptions, TransformSourceDescription, MinimalPluginContext } from "rollup";
 import { createFilter } from "./get-options-overrides";
@@ -49,7 +50,7 @@ const typescript: PluginImpl<Partial<IOptions>> = (options) =>
 			check: true,
 			verbosity: VerbosityLevel.Warning,
 			clean: false,
-			cacheRoot: `${process.cwd()}/.rpt2_cache`,
+			cacheRoot: findCacheDir({ name: "rollup-plugin-typescript2" }),
 			include: ["*.ts+(|x)", "**/*.ts+(|x)"],
 			exclude: ["*.d.ts", "**/*.d.ts"],
 			abortOnError: true,