Simplify createLanguage (#7509)

src/language-css/index.js

@@ -5,26 +5,22 @@ const options = require("./options");
 const createLanguage = require("../utils/create-language");
 
 const languages = [
-  createLanguage(require("linguist-languages/data/CSS"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/CSS"), () => ({
     since: "1.4.0",
     parsers: ["css"],
     vscodeLanguageIds: ["css"]
   })),
-  createLanguage(require("linguist-languages/data/PostCSS"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/PostCSS"), () => ({
     since: "1.4.0",
     parsers: ["css"],
     vscodeLanguageIds: ["postcss"]
   })),
-  createLanguage(require("linguist-languages/data/Less"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/Less"), () => ({
     since: "1.4.0",
     parsers: ["less"],
     vscodeLanguageIds: ["less"]
   })),
-  createLanguage(require("linguist-languages/data/SCSS"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/SCSS"), () => ({
     since: "1.4.0",
     parsers: ["scss"],
     vscodeLanguageIds: ["scss"]

src/language-graphql/index.js

@@ -5,8 +5,7 @@ const options = require("./options");
 const createLanguage = require("../utils/create-language");
 
 const languages = [
-  createLanguage(require("linguist-languages/data/GraphQL"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/GraphQL"), () => ({
     since: "1.5.0",
     parsers: ["graphql"],
     vscodeLanguageIds: ["graphql"]

src/language-handlebars/index.js

@@ -4,8 +4,7 @@ const printer = require("./printer-glimmer");
 const createLanguage = require("../utils/create-language");
 
 const languages = [
-  createLanguage(require("linguist-languages/data/Handlebars"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/Handlebars"), () => ({
     since: null, // unreleased
     parsers: ["glimmer"],
     vscodeLanguageIds: ["handlebars"]

src/language-html/index.js

@@ -5,8 +5,7 @@ const createLanguage = require("../utils/create-language");
 const options = require("./options");
 
 const languages = [
-  createLanguage(require("linguist-languages/data/HTML"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/HTML"), () => ({
     name: "Angular",
     since: "1.15.0",
     parsers: ["angular"],
@@ -15,7 +14,6 @@ const languages = [
     filenames: []
   })),
   createLanguage(require("linguist-languages/data/HTML"), data => ({
-    ...data,
     since: "1.15.0",
     parsers: ["html"],
     vscodeLanguageIds: ["html"],
@@ -23,8 +21,7 @@ const languages = [
       ".mjml" // MJML is considered XML in Linguist but it should be formatted as HTML
     ])
   })),
-  createLanguage(require("linguist-languages/data/HTML"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/HTML"), () => ({
     name: "Lightning Web Components",
     since: "1.17.0",
     parsers: ["lwc"],
@@ -32,8 +29,7 @@ const languages = [
     extensions: [],
     filenames: []
   })),
-  createLanguage(require("linguist-languages/data/Vue"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/Vue"), () => ({
     since: "1.10.0",
     parsers: ["vue"],
     vscodeLanguageIds: ["vue"]

src/language-js/index.js

@@ -7,14 +7,12 @@ const createLanguage = require("../utils/create-language");
 
 const languages = [
   createLanguage(require("linguist-languages/data/JavaScript"), data => ({
-    ...data,
     since: "0.0.0",
     parsers: ["babel", "flow"],
     vscodeLanguageIds: ["javascript", "mongo"],
     interpreters: data.interpreters.concat(["nodejs"])
   })),
-  createLanguage(require("linguist-languages/data/JavaScript"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/JavaScript"), () => ({
     name: "Flow",
     since: "0.0.0",
     parsers: ["babel", "flow"],
@@ -23,26 +21,22 @@ const languages = [
     filenames: [],
     extensions: [".js.flow"]
   })),
-  createLanguage(require("linguist-languages/data/JSX"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/JSX"), () => ({
     since: "0.0.0",
     parsers: ["babel", "flow"],
     vscodeLanguageIds: ["javascriptreact"]
   })),
-  createLanguage(require("linguist-languages/data/TypeScript"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/TypeScript"), () => ({
     since: "1.4.0",
     parsers: ["typescript", "babel-ts"],
     vscodeLanguageIds: ["typescript"]
   })),
-  createLanguage(require("linguist-languages/data/TSX"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/TSX"), () => ({
     since: "1.4.0",
     parsers: ["typescript", "babel-ts"],
     vscodeLanguageIds: ["typescriptreact"]
   })),
-  createLanguage(require("linguist-languages/data/JSON"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/JSON"), () => ({
     name: "JSON.stringify",
     since: "1.13.0",
     parsers: ["json-stringify"],
@@ -51,7 +45,6 @@ const languages = [
     filenames: ["package.json", "package-lock.json", "composer.json"]
   })),
   createLanguage(require("linguist-languages/data/JSON"), data => ({
-    ...data,
     since: "1.5.0",
     parsers: ["json"],
     vscodeLanguageIds: ["json"],
@@ -60,15 +53,13 @@ const languages = [
   createLanguage(
     require("linguist-languages/data/JSON with Comments"),
     data => ({
-      ...data,
       since: "1.5.0",
       parsers: ["json"],
       vscodeLanguageIds: ["jsonc"],
       filenames: data.filenames.concat([".eslintrc"])
     })
   ),
-  createLanguage(require("linguist-languages/data/JSON5"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/JSON5"), () => ({
     since: "1.13.0",
     parsers: ["json5"],
     vscodeLanguageIds: ["json5"]

src/language-markdown/index.js

@@ -6,15 +6,13 @@ const createLanguage = require("../utils/create-language");
 
 const languages = [
   createLanguage(require("linguist-languages/data/Markdown"), data => ({
-    ...data,
     since: "1.8.0",
     parsers: ["remark"],
     vscodeLanguageIds: ["markdown"],
     filenames: data.filenames.concat(["README"]),
     extensions: data.extensions.filter(extension => extension !== ".mdx")
   })),
-  createLanguage(require("linguist-languages/data/Markdown"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/Markdown"), () => ({
     name: "MDX",
     since: "1.15.0",
     parsers: ["mdx"],

src/language-yaml/index.js

@@ -5,8 +5,7 @@ const options = require("./options");
 const createLanguage = require("../utils/create-language");
 
 const languages = [
-  createLanguage(require("linguist-languages/data/YAML"), data => ({
-    ...data,
+  createLanguage(require("linguist-languages/data/YAML"), () => ({
     since: "1.14.0",
     parsers: ["yaml"],
     vscodeLanguageIds: ["yaml"]

src/utils/create-language.js

@@ -1,12 +1,10 @@
 "use strict";
 
-module.exports = function(linguistData, transform) {
-  const language = {};
-
-  for (const key in linguistData) {
-    const newKey = key === "languageId" ? "linguistLanguageId" : key;
-    language[newKey] = linguistData[key];
-  }
-
-  return transform(language);
+module.exports = function(linguistData, override) {
+  const { languageId, ...rest } = linguistData;
+  return {
+    linguistLanguageId: languageId,
+    ...rest,
+    ...override(linguistData)
+  };
 };