CMakePM: Expand CMake preset macros also for environment vars

This fixes the case when a CMake variable (CMAKE_PREFIX_PATH) would
reference an environment variable (qt_path) that would contain a CMake
preset macro (${sourceDir}/../qt_install).

Fixes: QTCREATORBUG-28606
Change-Id: Ib6239b13782b2ea854969547af46c3fe82a061f4
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/cmakeprojectmanager/cmakeprojectimporter.cpp

@@ -154,7 +154,9 @@ FilePaths CMakeProjectImporter::importCandidates()
 }
 
 static CMakeConfig configurationFromPresetProbe(
-    const FilePath &importPath, const PresetsDetails::ConfigurePreset &configurePreset)
+    const FilePath &importPath,
+    const FilePath &sourceDirectory,
+    const PresetsDetails::ConfigurePreset &configurePreset)
 {
     const FilePath cmakeListTxt = importPath / "CMakeLists.txt";
     cmakeListTxt.writeFileContents(QByteArray("cmake_minimum_required(VERSION 3.15)\n"
@@ -169,7 +171,7 @@ static CMakeConfig configurationFromPresetProbe(
     const FilePath cmakeExecutable = FilePath::fromString(configurePreset.cmakeExecutable.value());
 
     Environment env = cmakeExecutable.deviceEnvironment();
-    CMakePresets::Macros::expand(configurePreset, env, importPath);
+    CMakePresets::Macros::expand(configurePreset, env, sourceDirectory);
 
     env.setupEnglishOutput();
     cmake.setEnvironment(env);
@@ -208,9 +210,14 @@ static CMakeConfig configurationFromPresetProbe(
                                       : CMakeConfig();
 
         auto expandCacheValue =
-            [configurePreset, env, importPath, cache](const QString &key) -> QString {
+            [configurePreset, env, sourceDirectory, cache](const QString &key) -> QString {
             QString result = cache.stringValueOf(key.toUtf8());
-            CMakePresets::Macros::expand(configurePreset, env, importPath, result);
+            CMakePresets::Macros::expand(configurePreset, env, sourceDirectory, result);
+
+            // all usages involve file paths, so make sure they are cleaned up
+            const FilePaths paths = transform(result.split(";"), &FilePath::fromUserInput);
+            result = transform(paths, &FilePath::path).join(";");
+
             return result;
         };
 
@@ -665,7 +672,7 @@ QList<void *> CMakeProjectImporter::examineDirectory(const FilePath &importPath,
         if (cache.valueOf("CMAKE_C_COMPILER").isEmpty()
             && cache.valueOf("CMAKE_CXX_COMPILER").isEmpty()) {
             QApplication::setOverrideCursor(Qt::WaitCursor);
-            config = configurationFromPresetProbe(importPath, configurePreset);
+            config = configurationFromPresetProbe(importPath, projectDirectory(), configurePreset);
             QApplication::restoreOverrideCursor();
 
             if (!configurePreset.generator) {

src/plugins/cmakeprojectmanager/presetsmacros.cpp

@@ -144,6 +144,9 @@ void expand(const PresetType &preset,
             return env.value(macroName);
         });
 
+        // Make sure to expand the CMake macros also for environment variables
+        expandAllButEnv(preset, sourceDirectory, value);
+
         if (append)
             env.appendOrSet(key, value, sep);
         else
@@ -182,6 +185,9 @@ void expand(const PresetType &preset,
             return QString("${%1}").arg(macroName);
         });
 
+        // Make sure to expand the CMake macros also for environment variables
+        expandAllButEnv(preset, sourceDirectory, value);
+
         envItems.emplace_back(Utils::EnvironmentItem(key, value, operation));
     }
 }
@@ -202,6 +208,9 @@ void expand(const PresetType &preset,
     value = expandMacroEnv("penv", value, [env](const QString &macroName) {
         return env.value(macroName);
     });
+
+    // Make sure to expand the CMake macros also for environment variables
+    expandAllButEnv(preset, sourceDirectory, value);
 }
 
 void updateToolchainFile(