refactor: upgrade to cosmiconfig@5

package.json

@@ -20,7 +20,7 @@
     "camelcase": "4.1.0",
     "chalk": "2.1.0",
     "cjk-regex": "1.0.2",
-    "cosmiconfig": "3.1.0",
+    "cosmiconfig": "5.0.5",
     "dashify": "0.2.2",
     "dedent": "0.7.0",
     "diff": "3.2.0",

scripts/build/build.js

@@ -98,7 +98,7 @@ async function run(params) {
     await execa("rm", ["-rf", ".cache"]);
   }
 
-  const bundleCache = new Cache(".cache/", "v2");
+  const bundleCache = new Cache(".cache/", "v3");
   await bundleCache.load();
 
   console.log(chalk.inverse(" Building packages "));

scripts/build/config.js

@@ -113,13 +113,9 @@ const coreBundles = [
     type: "core",
     target: "node",
     replace: {
-      // The require-from-string module (a dependency of cosmiconfig) assumes
-      // that `module.parent` exists, but it only does for `require`:ed modules.
-      // Usually, require-from-string is _always_ `require`:ed, but when bundled
-      // with rollup the module is turned into a plain function located directly
-      // in index.js so `module.parent` does not exist. Defaulting to `module`
-      // instead seems to work.
-      "module.parent": "(module.parent || module)"
+      // cosmiconfig@5 uses `require` to resolve js config, which caused Error:
+      // Dynamic requires are not currently supported by rollup-plugin-commonjs.
+      "require(filepath)": "eval('require')(filepath)"
     }
   }
 ];

src/config/resolve-config.js

@@ -7,19 +7,33 @@ const mem = require("mem");
 
 const resolveEditorConfig = require("./resolve-config-editorconfig");
 
-const getExplorerMemoized = mem(opts =>
-  thirdParty.cosmiconfig("prettier", {
-    sync: opts.sync,
+const getExplorerMemoized = mem(opts => {
+  const explorer = thirdParty.cosmiconfig("prettier", {
     cache: opts.cache,
-    rcExtensions: true,
     transform: result => {
       if (result && result.config) {
+        if (typeof result.config !== "object") {
+          throw new Error(
+            `Config is only allowed to be an object, ` +
+              `but received ${typeof result.config} in "${result.filepath}"`
+          );
+        }
+
         delete result.config.$schema;
       }
       return result;
     }
-  })
-);
+  });
+
+  const load = opts.sync ? explorer.loadSync : explorer.load;
+  const search = opts.sync ? explorer.searchSync : explorer.search;
+
+  return {
+    // cosmiconfig v4 interface
+    load: (searchPath, configPath) =>
+      configPath ? load(configPath) : search(searchPath)
+  };
+});
 
 /** @param {{ cache: boolean, sync: boolean }} opts */
 function getLoadFunction(opts) {

tests_integration/__tests__/__snapshots__/config-invalid.js.snap

@@ -19,7 +19,7 @@ exports[`show warning with unknown option (stdout) 1`] = `""`;
 exports[`show warning with unknown option (write) 1`] = `Array []`;
 
 exports[`throw error with invalid config format (stderr) 1`] = `
-"[error] Invalid configuration file: Failed to parse \\"<cwd>/tests_integration/cli/config/invalid/file/.prettierrc\\" as JSON, JS, or YAML.
+"[error] Invalid configuration file: Config is only allowed to be an object, but received string in \\"<cwd>/tests_integration/cli/config/invalid/file/.prettierrc\\"
 "
 `;
 

yarn.lock

@@ -1504,14 +1504,13 @@ core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
-cosmiconfig@3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-3.1.0.tgz#640a94bf9847f321800403cd273af60665c73397"
+cosmiconfig@5.0.5:
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/cosmiconfig/-/cosmiconfig-5.0.5.tgz#a809e3c2306891ce17ab70359dc8bdf661fe2cd0"
   dependencies:
     is-directory "^0.3.1"
     js-yaml "^3.9.0"
-    parse-json "^3.0.0"
-    require-from-string "^2.0.1"
+    parse-json "^4.0.0"
 
 create-ecdh@^4.0.0:
   version "4.0.0"
@@ -3592,6 +3591,10 @@ json-loader@^0.5.4:
   version "0.5.4"
   resolved "https://registry.yarnpkg.com/json-loader/-/json-loader-0.5.4.tgz#8baa1365a632f58a3c46d20175fc6002c96e37de"
 
+json-parse-better-errors@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz#bb867cfb3450e69107c131d1c514bab3dc8bcaa9"
+
 json-schema-traverse@^0.3.0:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/json-schema-traverse/-/json-schema-traverse-0.3.1.tgz#349a6d44c53a51de89b40805c5d5e59b417d3340"
@@ -4308,11 +4311,12 @@ parse-json@^2.2.0:
   dependencies:
     error-ex "^1.2.0"
 
-parse-json@^3.0.0:
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-3.0.0.tgz#fa6f47b18e23826ead32f263e744d0e1e847fb13"
+parse-json@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/parse-json/-/parse-json-4.0.0.tgz#be35f5425be1f7f6c747184f98a788cb99477ee0"
   dependencies:
     error-ex "^1.3.1"
+    json-parse-better-errors "^1.0.1"
 
 parse5@3.0.3:
   version "3.0.3"
@@ -4873,10 +4877,6 @@ require-directory@^2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
 
-require-from-string@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/require-from-string/-/require-from-string-2.0.1.tgz#c545233e9d7da6616e9d59adfb39fc9f588676ff"
-
 require-main-filename@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-1.0.1.tgz#97f717b69d48784f5f526a6c5aa8ffdda055a4d1"