feat(prettier): Forward all text to prettier

If we forward all text with it's filepath if there is one, prettier will figure out which parser it should use. This will make this package support all future parsers prettier till add in the future by default.

We only have to check which files to forward to eslint which is something that changes less frequently. For now we forward files with extension defined in eslint config or default to .js/.jsx/.ts/.tsx files.

src/index.js

@@ -61,6 +61,7 @@ function format(options) {
 
   const prettierOptions = merge(
     {},
+    filePath && { filepath: filePath },
     getPrettierConfig(filePath, prettierPath),
     options.prettierOptions
   );
@@ -85,35 +86,28 @@ function format(options) {
     })
   );
 
-  const isCss = /\.(css)$/.test(filePath);
-  const isLess = /\.(less)$/.test(filePath);
-  const isScss = /\.(scss)$/.test(filePath);
-  const isTypeScript = /\.(ts|tsx)$/.test(filePath);
-  const isGraphQL = /\.(graphql|gql)$/.test(filePath);
-  const isJson = /\.json$/.test(filePath);
+  const eslintExtensions = eslintConfig.extensions || [
+    ".js",
+    ".jsx",
+    ".ts",
+    ".tsx"
+  ];
+  const eslintExtensionsRegex = new RegExp(eslintExtensions.join("|"), "gi");
 
-  if (isCss) {
-    formattingOptions.prettier.parser = "css";
-  } else if (isLess) {
-    formattingOptions.prettier.parser = "less";
-  } else if (isScss) {
-    formattingOptions.prettier.parser = "scss";
-  } else if (isTypeScript) {
-    formattingOptions.prettier.parser = "typescript";
+  // If we don't get filePath run eslint on text, otherwise only run eslint
+  // if it's a configured extension or fall back to a "supported" file type.
+  const onlyPrettier = filePath ? !eslintExtensionsRegex.test(filePath) : false;
+
+  if (/\.tsx?$/.test(filePath)) {
     // XXX: It seems babylon is getting a TypeScript plugin.
     // Should that be used instead?
     formattingOptions.eslint.parser = "typescript-eslint-parser";
-  } else if (isGraphQL) {
-    formattingOptions.prettier.parser = "graphql";
-  } else if (isJson) {
-    formattingOptions.prettier.parser = "json";
-    formattingOptions.prettier.trailingComma = "none";
   }
 
   const prettify = createPrettify(formattingOptions.prettier, prettierPath);
 
-  if (isCss || isLess || isScss || isGraphQL || isJson) {
-    return prettify(text, filePath);
+  if (onlyPrettier) {
+    return prettify(text);
   }
 
   const eslintFix = createEslintFix(formattingOptions.eslint, eslintPath);