Added partial support for the "--config-precedence" option

Author: fabiospampinato

src/bin.ts

@@ -78,11 +78,19 @@ const makeBin = (): Bin => {
         section: "Format",
       })
       /* CONFIG OPTIONS */
-      .option("--config-path <path>", "Path to a Prettier configuration file (.prettierrc, package.json, prettier.config.js)", { section: "Config" })
       .option("--no-config", "Do not look for a configuration file", {
         section: "Config",
         default: true,
       })
+      .option("--config-path <path>", "Path to a Prettier configuration file (.prettierrc, package.json, prettier.config.js)", { section: "Config" })
+      .option(
+        "--config-precedence <cli-override|file-override>",
+        'Define in which order config files and CLI options should be evaluated.\nDefaults to "cli-override"',
+        {
+          section: "Config",
+          enum: ["cli-override", "file-override"],
+        },
+      )
       .option("--no-editorconfig", "Don't take .editorconfig into account when parsing configuration", {
         section: "Config",
         default: true,
@@ -230,6 +238,10 @@ const makeWarnedPluggableBin = async (): Promise<Bin> => {
     exit('The "--find-config-path" is not currently supported, please open an issue on GitHub if you need it');
   }
 
+  if (args["config-precedence"] === "prefer-file") {
+    exit('The "prefer-file" value for "--config-precedence" is not currently supported, please open an issue on GitHub if you need it');
+  }
+
   const bin = await makePluggableBin();
   return bin;
 };

src/prettier_serial.ts

@@ -18,11 +18,12 @@ async function format(filePath: string, fileContent: string, formatOptions: Lazy
   formatOptions = await resolve(formatOptions);
   const pluginsBuiltin = await getPluginsBuiltin();
   const plugins = await getPlugins(formatOptions.plugins || []);
+  const pluginsOverride = contextOptions.configPrecedence !== 'file-override';
 
   const options = {
     ...pluginsDefaultOptions,
-    ...formatOptions,
-    ...pluginsCustomOptions,
+    ...(pluginsOverride ? formatOptions : pluginsCustomOptions),
+    ...(pluginsOverride ? pluginsCustomOptions : formatOptions),
     ...contextOptions,
     filepath: filePath,
     plugins: [

src/types.ts

@@ -1,6 +1,7 @@
 type Bin = ReturnType<typeof import("tiny-bin").default>;
 
 type ContextOptions = {
+  configPrecedence?: "cli-override" | "file-override";
   cursorOffset?: number;
   rangeEnd?: number;
   rangeStart?: number;

src/utils.ts

@@ -345,6 +345,13 @@ function normalizeContextOptions(options: unknown): ContextOptions {
 
   const contextOptions: ContextOptions = {};
 
+  if ("configPrecedence" in options) {
+    const value = options.configPrecedence;
+    if (isString(value) && (value === "cli-override" || value === "file-override")) {
+      contextOptions.configPrecedence = value;
+    }
+  }
+
   if ("cursorOffset" in options) {
     const value = Number(options.cursorOffset);
     if (isInteger(value) && value >= 0) {