feat(support-info): add options field

package.json

@@ -21,6 +21,7 @@
     "cjk-regex": "1.0.2",
     "cosmiconfig": "3.1.0",
     "dashify": "0.2.2",
+    "dedent": "0.7.0",
     "diff": "3.2.0",
     "editorconfig": "0.14.2",
     "editorconfig-to-prettier": "0.0.5",
@@ -77,6 +78,7 @@
     "rollup-plugin-node-resolve": "2.0.0",
     "rollup-plugin-replace": "1.2.1",
     "shelljs": "0.7.8",
+    "snapshot-diff": "0.2.2",
     "strip-ansi": "4.0.0",
     "sw-toolbox": "3.6.0",
     "uglify-es": "3.0.28",

src/cli-constant.js

@@ -1,6 +1,7 @@
 "use strict";
 
 const camelCase = require("camelcase");
+const dedent = require("dedent");
 
 const CATEGORY_CONFIG = "Config";
 const CATEGORY_EDITOR = "Editor";
@@ -386,17 +387,12 @@ const minimistOptions = {
     )
 };
 
-const usageSummary = `
-Usage: prettier [options] [file/glob ...]
+const usageSummary = dedent(`
+  Usage: prettier [options] [file/glob ...]
 
-By default, output is written to stdout.
-Stdin is read if it is piped to Prettier and no files are given.
-`.trim();
-
-function dedent(str) {
-  const spaces = str.match(/\n^( +)/m)[1].length;
-  return str.replace(new RegExp(`^ {${spaces}}`, "gm"), "").trim();
-}
+  By default, output is written to stdout.
+  Stdin is read if it is piped to Prettier and no files are given.
+`);
 
 function normalizeDetailedOptions(rawDetailedOptions) {
   const names = Object.keys(rawDetailedOptions).sort();

src/options.js

@@ -4,7 +4,7 @@ const path = require("path");
 
 const validate = require("jest-validate").validate;
 const deprecatedConfig = require("./deprecated");
-const supportTable = require("./support").supportTable;
+const supportLanguages = require("./support").supportLanguages;
 
 const defaults = {
   cursorOffset: -1,
@@ -43,7 +43,7 @@ function normalize(options) {
     const extension = path.extname(filepath);
     const filename = path.basename(filepath).toLowerCase();
 
-    const language = supportTable.find(
+    const language = supportLanguages.find(
       language =>
         typeof language.since === "string" &&
         (language.extensions.indexOf(extension) > -1 ||