feat(deno-lint): Support config content in lint and webpack (#644)

While enableAllRules serves as "tags": ["recommended"], there is no
way to specify the whole config as known from .denolint.json.
Passing RulesConfig would be better, but it would need to make it
serialisable.

Co-authored-by: LongYinan <lynweklm@gmail.com>

packages/deno-lint/README.md

@@ -50,12 +50,24 @@ Lint benchmark bench suite: Fastest is @node-rs/deno-lint
 
 ## Usage
 
+Pass a boolean `enableAllRules` to use the recommended (`true`, default) or all rules (`false`):
+
 ```ts
 import { lint } from '@node-rs/deno-lint'
 
 lint(filepath, source, enableAllRules)
 ```
 
+Pass the config file content (as string), to be able to specify what rules should be included or excluded:
+
+```ts
+import { readFile } from 'fs/promises'
+import { lint } from '@node-rs/deno-lint'
+
+const config = await readFile('.denolint.json', 'utf8')
+lint(filepath, source, config)
+```
+
 ## webpack-loader
 
 ```js
@@ -81,11 +93,13 @@ You can pass denolint options using standard webpack loader options.
 
 #### `enableAllRules`
 
-- Type: `Boolean`
+- Type: `Boolean | String`
 - Default: `false`
 
 Whether to enable all rules. If false, `denolint` will enable all recommend rules.
 
+Instead of the boolean, a string with the content of `.denolint.json` can be passed as a value.
+
 #### `failOnError`
 
 - Type: `Boolean`

packages/deno-lint/index.d.ts

@@ -6,6 +6,6 @@
 export function lint(
   fileName: string,
   sourceCode: string | Buffer,
-  allRules?: boolean | undefined | null,
+  allRules?: boolean | string | undefined | null
 ): Array<string>
 export function denolint(dirname: string, configPath: string): boolean

packages/deno-lint/src/config.rs

@@ -42,6 +42,11 @@ pub fn load_from_json(config_path: &Path) -> Result<Config, std::io::Error> {
   Ok(config)
 }
 
+pub fn load_from_string(json_str: String) -> Result<Config, std::io::Error> {
+  let config: Config = serde_json::from_str(&json_str)?;
+  Ok(config)
+}
+
 #[cfg(test)]
 mod tests {
   use super::*;

packages/deno-lint/src/lib.rs

@@ -37,14 +37,24 @@ fn get_media_type(p: &Path) -> MediaType {
 fn lint(
   file_name: String,
   source_code: Either<String, Buffer>,
-  all_rules: Option<bool>,
+  all_rules: Option<Either<bool, String>>,
 ) -> Result<Vec<String>> {
-  let all_rules = all_rules.unwrap_or(false);
   let linter = LinterBuilder::default()
-    .rules(if all_rules {
-      get_all_rules()
-    } else {
-      get_recommended_rules()
+    .rules(match all_rules {
+      Some(r) => match r {
+        Either::A(a) => {
+          if a {
+            get_all_rules()
+          } else {
+            get_recommended_rules()
+          }
+        }
+        Either::B(b) => {
+          let cfg = config::load_from_string(b)?;
+          cfg.get_rules()
+        }
+      },
+      None => get_recommended_rules(),
     })
     .media_type(get_media_type(Path::new(file_name.as_str())))
     .ignore_diagnostic_directive("eslint-disable-next-line")