QQmlJSLinter: add crude context properties warnings

Warn in QQmlJSTypePropagator::generate_LoadQmlContextPropertyLookup()
about usages of context properties that were found. Also treat context
properties as var.
Add the (C++) location of the "setContextProperty()" call to the
warning, and also hint that a property is assumed to be a context
property when inside a top-level component (capital C Component, inline
component or implicitly wrapped as component) because it is not
declared as required property.

Still print the accompanying unqualified warnings next to the new
context property warning.

Add a test.

Later patches will add the support to qmlls and qmllint by passing
the workspace folders to the new functionality.

Task-number: QTBUG-128232
Change-Id: I26e39e0bce8c6e9f203962a091209c7acd15d445
Reviewed-by: Olivier De Cannière <olivier.decanniere@qt.io>

1 files changed, 3 insertions, 1 deletions

diff --git a/tools/qmllint/main.cpp b/tools/qmllint/main.cpp
index 62210a5a9d..a865d96bba 100644
--- a/tools/qmllint/main.cpp
+++ b/tools/qmllint/main.cpp
@@ -428,9 +428,11 @@ All warnings can be set to three levels:
             lintResult = linter.lintModule(filename, silent, useJson ? &jsonFiles : nullptr,
                                            qmlImportPaths, resourceFiles);
         } else {
+            // TODO: collect root urls here
+            const QQmlJS::ContextProperties contextProperties;
             lintResult = linter.lintFile(filename, nullptr, silent || isFixing,
                                          useJson ? &jsonFiles : nullptr, qmlImportPaths,
-                                         qmldirFiles, resourceFiles, categories);
+                                         qmldirFiles, resourceFiles, categories, contextProperties);
         }
         success &= (lintResult == QQmlJSLinter::LintSuccess || lintResult == QQmlJSLinter::HasWarnings);
         if (success) {