qdoc: Clear config variables before loading a new .qdocconf file

Previously, this problem was masked as the Config object was local
to the processQdocconf() function in main.cpp - but now we keep
that object and process multiple .qdocconf files in single-exec
mode.

When in single-exec mode, the previously read variables remained
in the config, resulting in all kinds of unintended consequences
- such as processing source directories from other documentation
projects.

Fixes: QTBUG-78776
Change-Id: Ic23d1cb0eacb112cc60a63cd43b4d51ff57f0583
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/qdoc/config.h b/src/qdoc/config.h
index 71ad6dc3b..615387f73 100644
--- a/src/qdoc/config.h
+++ b/src/qdoc/config.h
@@ -80,6 +80,8 @@ public:
 
     bool getDebug() const { return debug_; }
 
+    void clear();
+    void reset();
     void load(const QString &fileName);
     void setStringList(const QString &var, const QStringList &values);
     void insertStringList(const QString &var, const QStringList &values);