Add JSON parsing support to qmake.

Add qjson* implementation files from corelib/json
to the qmake build. Add a read-only compile mode,
enabled by defining QT_JSON_READONLY.

Add qmake built-in function parseJson(file, into)
which parses a json file into the given variable.

qmake uses a flat key -> value-list implementation
for storing variables, which means that some hackery
is need to represent arbitrarily nested JSON. Use a
special "_KEYS_" variable for arrays and objects:

Arrays:
["item1", "item2"]
$${array._KEYS_} -> 0 1 2
$${array.0} -> "item1"
$${array.1} -> "item2"

Objects:
{ "key1" : "value1", "key2" : "value2" }
$${object._KEYS_} -> key1 key2
$${object.key1} -> value1
$${object.key2} -> value2

Change-Id: I0aa2e4e4ae14fa25be8242bc16d3cffce32504d2
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/auto/tools/qmake/tst_qmake.cpp b/tests/auto/tools/qmake/tst_qmake.cpp
index cf5c75a66b..87e86406b8 100644
--- a/tests/auto/tools/qmake/tst_qmake.cpp
+++ b/tests/auto/tools/qmake/tst_qmake.cpp
@@ -92,6 +92,7 @@ private slots:
     void substitutes();
     void project();
     void proFileCache();
+    void json();
 
 private:
     TestCompiler test_compiler;
@@ -556,5 +557,33 @@ void tst_qmake::proFileCache()
     QVERIFY( test_compiler.qmake( workDir, "pro_file_cache" ));
 }
 
+void tst_qmake::json()
+{
+    QString workDir = base_path + "/testdata/json";
+    QVERIFY( test_compiler.qmake( workDir, "json.pro" ));
+    QString output = test_compiler.commandOutput();
+
+    // all keys
+    QVERIFY(output.contains("json._KEYS_ array false null number object string true"));
+    // array
+    QVERIFY(output.contains("json.array._KEYS_ 0 1 2"));
+    QVERIFY(output.contains("json.array.0 arrayItem1"));
+    QVERIFY(output.contains("json.array.1 arrayItem2"));
+    QVERIFY(output.contains("json.array.2 arrayItem3"));
+    // object
+    QVERIFY(output.contains("json.object._KEYS_ key1 key2"));
+    QVERIFY(output.contains("json.object.key1 objectValue1"));
+    QVERIFY(output.contains("json.object.key1 objectValue1"));
+     // value types
+    QVERIFY(output.contains("json.string: test string"));
+    QVERIFY(output.contains("json.number: 999"));
+    QVERIFY(output.contains("json.true: true"));
+    QVERIFY(output.contains("json.false: false"));
+    QVERIFY(output.contains("json.null:"));
+    // functional booleans
+    QVERIFY(output.contains("json.true is true"));
+    QVERIFY(output.contains("json.false is false"));
+}
+
 QTEST_MAIN(tst_qmake)
 #include "tst_qmake.moc"