Support $penv{} in include paths

CHANGELOG.md

@@ -10,6 +10,7 @@ Improvements:
 - In multi-root workspace, the Project Outline View now shows all configured projects. [PR #3270](https://github.com/microsoft/vscode-cmake-tools/pull/3270) [@vlavati](https://github.com/vlavati)
 - Added script mode and ability to connect to externally launched CMake processes. [PR #3277](https://github.com/microsoft/vscode-cmake-tools/pull/3277)
 - Added buttons to the project nodes in the Project Outline View. [PR #3354](https://github.com/microsoft/vscode-cmake-tools/pull/3354) [@vlavati](https://github.com/vlavati)
+- `$penv{}` macros are expanded in `include` paths in CMakePresets.json as long as `version` is 7 or higher. [#3310](https://github.com/microsoft/vscode-cmake-tools/issues/3310)
 
 Bug Fixes:
 - Fix Unhandled Exception if no args are specified in `cmake.getLaunchTargetFilename` inside an input context of a task. [PR #3348](https://github.com/microsoft/vscode-cmake-tools/issues/3348) [@vlavati](https://github.com/vlavati)

src/expand.ts

@@ -126,6 +126,11 @@ export async function expandString<T>(input: string | T, opts: ExpansionOptions)
     return replaceAll(result, '${dollar}', '$');
 }
 
+// Regular expression for variable value (between the variable suffix and the next ending curly bracket):
+// .+? matches any character (except line terminators) between one and unlimited times,
+// as few times as possible, expanding as needed (lazy)
+const varValueRegexp = ".+?";
+
 async function expandStringHelper(input: string, opts: ExpansionOptions) {
     const envPreNormalize = opts.envOverride ? opts.envOverride : process.env;
     const env = EnvironmentUtils.create(envPreNormalize);
@@ -153,10 +158,6 @@ async function expandStringHelper(input: string, opts: ExpansionOptions) {
         }
     }
 
-    // Regular expression for variable value (between the variable suffix and the next ending curly bracket):
-    // .+? matches any character (except line terminators) between one and unlimited times,
-    // as few times as possible, expanding as needed (lazy)
-    const varValueRegexp = ".+?";
     const envRegex1 = RegExp(`\\$\\{env:(${varValueRegexp})\\}`, "g");
     while ((mat = envRegex1.exec(input))) {
         const full = mat[0];
@@ -189,13 +190,7 @@ async function expandStringHelper(input: string, opts: ExpansionOptions) {
         subs.set(full, replacement);
     }
 
-    const parentEnvRegex = RegExp(`\\$penv\\{(${varValueRegexp})\\}`, "g");
-    while ((mat = parentEnvRegex.exec(input))) {
-        const full = mat[0];
-        const varName = mat[1];
-        const replacement = fixPaths(process.env[varName]) || '';
-        subs.set(full, replacement);
-    }
+    getParentEnvSubstitutions(input, subs);
 
     if (vscode.workspace.workspaceFolders && vscode.workspace.workspaceFolders.length > 0) {
         const folderRegex = RegExp(`\\$\\{workspaceFolder:(${varValueRegexp})\\}`, "g");
@@ -241,6 +236,19 @@ async function expandStringHelper(input: string, opts: ExpansionOptions) {
         }
     }
 
+    return { ...substituteAll(input, subs), circularReference };
+}
+
+export async function expandStrings(inputs: string[], opts: ExpansionOptions): Promise<string[]> {
+    const expandedInputs: string[] = [];
+    for (const input of inputs) {
+        const expandedInput: string = await expandString(input, opts);
+        expandedInputs.push(expandedInput);
+    }
+    return expandedInputs;
+}
+
+export function substituteAll(input: string, subs: Map<string, string>) {
     let finalString = input;
     let didReplacement = false;
     subs.forEach((value, key) => {
@@ -249,14 +257,18 @@ async function expandStringHelper(input: string, opts: ExpansionOptions) {
             didReplacement = true;
         }
     });
-    return { result: finalString, didReplacement, circularReference };
+    return { result: finalString, didReplacement };
 }
 
-export async function expandStrings(inputs: string[], opts: ExpansionOptions): Promise<string[]> {
-    const expandedInputs: string[] = [];
-    for (const input of inputs) {
-        const expandedInput: string = await expandString(input, opts);
-        expandedInputs.push(expandedInput);
+export function getParentEnvSubstitutions(input: string, subs: Map<string, string>): Map<string, string> {
+    let mat: RegExpMatchArray | null = null;
+    const parentEnvRegex = RegExp(`\\$penv\\{(${varValueRegexp})\\}`, "g");
+    while ((mat = parentEnvRegex.exec(input))) {
+        const full = mat[0];
+        const varName = mat[1];
+        const replacement = fixPaths(process.env[varName]) || '';
+        subs.set(full, replacement);
     }
-    return expandedInputs;
+
+    return subs;
 }

src/presetsController.ts

@@ -9,7 +9,7 @@ import { fs } from '@cmt/pr';
 import * as preset from '@cmt/preset';
 import * as util from '@cmt/util';
 import rollbar from '@cmt/rollbar';
-import { ExpansionOptions } from '@cmt/expand';
+import { ExpansionOptions, getParentEnvSubstitutions, substituteAll } from '@cmt/expand';
 import paths from '@cmt/paths';
 import { KitsController } from '@cmt/kitsController';
 import { descriptionForKit, Kit, SpecialKits } from '@cmt/kit';
@@ -1025,7 +1025,12 @@ export class PresetsController {
 
         // Merge the includes in reverse order so that the final presets order is correct
         for (let i = presetsFile.include.length - 1; i >= 0; i--) {
-            const fullIncludePath = path.normalize(path.resolve(path.dirname(file), presetsFile.include[i]));
+            const rawInclude = presetsFile.include[i];
+            const includePath = presetsFile.version >= 7 ?
+                // Version 7 and later support $penv{} expansions in include paths
+                substituteAll(rawInclude, getParentEnvSubstitutions(rawInclude, new Map<string, string>())).result :
+                presetsFile.include[i];
+            const fullIncludePath = path.normalize(path.resolve(path.dirname(file), includePath));
 
             // Do not include files more than once
             if (referencedFiles.has(fullIncludePath)) {