fix(formatter): update vscode settings on change

Fixes #1007

CHANGELOG.md

@@ -80,6 +80,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
+- Fixed bug where formatting arguments would not be updated from settings.json
+  ([[#1007](https://github.com/fortran-lang/vscode-fortran-support/issues/1007)])
 - Fixed bug where specifying `-ffree-line-length-X` and `-ffixed-line-length-X`
   as `linter.extraArgs` would be overridden by the default behaviour of `fortls`
   ([#925](https://github.com/fortran-lang/vscode-fortran-support/issues/925))

src/format/provider.ts

@@ -16,9 +16,16 @@ import {
 } from '../util/tools';
 
 export class FortranFormattingProvider implements vscode.DocumentFormattingEditProvider {
-  private readonly workspace = vscode.workspace.getConfiguration(EXTENSION_ID);
+  private workspace = vscode.workspace.getConfiguration(EXTENSION_ID);
   private formatter: string | undefined;
-  constructor(private logger: Logger) {}
+  constructor(private logger: Logger) {
+    vscode.workspace.onDidChangeConfiguration(e => {
+      if (e.affectsConfiguration(`${EXTENSION_ID}.formatting`)) {
+        this.logger.debug('[format] Configuration changed, reloading formatter');
+        this.workspace = vscode.workspace.getConfiguration(EXTENSION_ID);
+      }
+    });
+  }
 
   public async provideDocumentFormattingEdits(
     document: vscode.TextDocument,