Don't merge all the compileCommandFragments for the browse path (#2754)

CHANGELOG.md

@@ -6,6 +6,7 @@ Improvements:
 - Preset in CMakeUserPresets.json using "condition" does not appear in configure preset selection. [#2749](https://github.com/microsoft/vscode-cmake-tools/issues/2749)
 - Resolve workspace variables in `cmake-kits.json`. [#2737](https://github.com/microsoft/vscode-cmake-tools/issues/2737)
 - Use upper case drive letters on Windows for `cmake.sourceDirectory`. [PR #2665](https://github.com/microsoft/vscode-cmake-tools/pull/2665) [@Danielmelody](https://github.com/Danielmelody)
+- Custom browse configuration should not include (redundant) per-file arguments. [#2645](https://github.com/microsoft/vscode-cmake-tools/issues/2645)
 
 ## 1.12.27
 Bug Fixes:

src/cpptools.ts

@@ -593,7 +593,7 @@ export class CppConfigurationProvider implements cpptools.CustomConfigurationPro
  // 3. Any `fileGroup` that does not have the associated attribute will receive the `default`
  const grps = target.fileGroups || [];
  const includePath = [...new Set(util.flatMap(grps, grp => grp.includePath || []))].map(item => item.path);
- const compileCommandFragments = [...util.flatMap(grps, grp => grp.compileCommandFragments || [])];
+ const compileCommandFragments = [...util.first(grps, grp => grp.compileCommandFragments || [])];
  const defines = [...new Set(util.flatMap(grps, grp => grp.defines || []))];
  const sysroot = target.sysroot;
  this.targets.push({ name: target.name, type: target.type });

src/util.ts

@@ -379,6 +379,19 @@ export function* flatMap<In, Out>(rng: Iterable<In>, fn: (item: In) => Iterable<
  }
 }
 
+/**
+ * Get the first non-empty item from an object that produces arrays of objects.
+ */
+export function first<In, Out>(array: Iterable<In>, fn: (item: In) => Out[]): Out[] {
+ for (const item of array) {
+ const result = fn(item);
+ if (result?.length > 0) {
+ return result;
+ }
+ }
+ return [];
+}
+
 export function makeDebuggerEnvironmentVars(env?: Environment): DebuggerEnvironmentVariable[] {
  if (!env) {
  return [];