qt-build-utils: support qmake wrapper scripts

Author: SanderVocke

crates/qt-build-utils/src/installation/qmake.rs

@@ -102,7 +102,9 @@ impl TryFrom<PathBuf> for QtInstallationQMake {
 
     fn try_from(qmake_path: PathBuf) -> anyhow::Result<Self> {
         // Attempt to read the QT_VERSION from qmake
-        let qmake_version = match Command::new(&qmake_path)
+        let qmake_command : String =
+            format!("{} -query QT_VERSION", qmake_path.to_string_lossy().to_string());
+        let qmake_version = match utils::native_shell_command(&qmake_command)
             .args(["-query", "QT_VERSION"])
             .output()
         {
@@ -373,9 +375,11 @@ impl QtInstallationQMake {
     }
 
     fn qmake_query(&self, var_name: &str) -> String {
+        let qmake_command = format!("{} -query {}",
+                                            self.qmake_path.to_string_lossy().to_string(),
+                                            var_name);
         String::from_utf8_lossy(
-            &Command::new(&self.qmake_path)
-                .args(["-query", var_name])
+            &utils::native_shell_command(&qmake_command)
                 .output()
                 .unwrap()
                 .stdout,

crates/qt-build-utils/src/utils.rs

@@ -3,6 +3,8 @@
 //
 // SPDX-License-Identifier: MIT OR Apache-2.0
 
+use std::process::Command;
+
 /// Whether apple is the current target
 pub(crate) fn is_apple_target() -> bool {
     std::env::var("TARGET")
@@ -14,3 +16,16 @@ pub(crate) fn is_apple_target() -> bool {
 pub(crate) fn is_emscripten_target() -> bool {
     std::env::var("CARGO_CFG_TARGET_OS") == Ok("emscripten".to_owned())
 }
+
+/// Wrap a command in a native subshell
+pub(crate) fn native_shell_command(command : &str) -> Command {
+    let mut result : Command;
+    if cfg!(target_os = "windows") {
+        result = Command::new("cmd");
+        result.args(["/C", &command]);
+    } else {
+        result = Command::new("sh");
+        result.args(["-c", &command]);
+    }
+    result
+}