ProjectExplorer: create provideAskPassEntry(Environment &) convenience

... to centrally set SUDO_ASKPASS unless present.

To be used for 'Run as root'

Change-Id: I85bac939e6a7fba0b2299fd17edfe73577bfa5ad
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/plugins/projectexplorer/runcontrol.cpp

@@ -50,6 +50,8 @@
 #include <coreplugin/icontext.h>
 #include <coreplugin/icore.h>
 
+#include <ssh/sshsettings.h>
+
 #include <QDir>
 #include <QFormLayout>
 #include <QHash>
@@ -1067,6 +1069,15 @@ bool RunControl::showPromptToStopDialog(const QString &title,
     return close;
 }
 
+void RunControl::provideAskPassEntry(Environment &env)
+{
+    if (env.value("SUDO_ASKPASS").isEmpty()) {
+        const FilePath askpass = QSsh::SshSettings::askpassFilePath();
+        if (askpass.exists())
+            env.set("SUDO_ASKPASS", askpass.toUserOutput());
+    }
+}
+
 bool RunControlPrivate::isAllowedTransition(RunControlState from, RunControlState to)
 {
     switch (from) {

src/plugins/projectexplorer/runcontrol.h

@@ -250,6 +250,8 @@ public:
                                        const QString &cancelButtonText = QString(),
                                        bool *prompt = nullptr);
 
+    static void provideAskPassEntry(Utils::Environment &env);
+
     RunWorker *createWorker(Utils::Id workerId);
 
     bool createMainWorker();