CMake: Move documentation into separate project

We've now four pages, which logically belong together. So let's
move them into one 'qtcmake' module.

Change-Id: I3015fc0804d62bcaec2cfbb6b84c6c08fe5f43f8
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>

doc/config/qtdoc.qdocconf

@@ -11,6 +11,7 @@ moduleheader =
 
 depends += \
     activeqt \
+    qtcmake \
     qdoc \
     qmake \
     qtandroidextras \
@@ -85,9 +86,10 @@ exampledirs += \
     ../snippets \
     ../../examples
 
-# Don't parse files in snippets directory
+# Don't parse files in snippets and cmake directories
 excludedirs += \
-    ../src/snippets
+    ../src/snippets \
+    ../src/cmake
 
 examplesinstallpath =
 

doc/src/cmake/cmake.pro

@@ -0,0 +1,9 @@
+TEMPLATE = aux
+
+QMAKE_DOCS = $$PWD/qtcmake.qdocconf
+
+QTDIR = $$[QT_HOST_PREFIX]
+exists($$QTDIR/.qmake.cache): \
+    QMAKE_DOCS_OUTPUTDIR = $$QTDIR/doc/cmake
+else: \
+    QMAKE_DOCS_OUTPUTDIR = $$OUT_PWD/cmake

doc/src/cmake/qtcmake.qdocconf

@@ -0,0 +1,39 @@
+include($QT_INSTALL_DOCS/global/qt-module-defaults.qdocconf)
+include($QT_INSTALL_DOCS/global/externalsites.qdocconf)
+
+project                 = QtCMake
+description             = Using Qt with CMake
+version                 = $QT_VERSION
+
+qhp.projects            = qtcmake
+
+qhp.qtcmake.file                = qtcmake.qhp
+qhp.qtcmake.namespace           = org.qt-project.qtcmake.$QT_VERSION_TAG
+qhp.qtcmake.virtualFolder       = qtcmake
+qhp.qtcmake.indexTitle          = Using Qt with CMake
+qhp.qtcmake.filterAttributes    = qt $QT_VERSION tools cmake
+qhp.qtcmake.customFilters.qtcmake.name = Build with CMake
+qhp.qtcmake.customFilters.qtcmake.filterAttributes = qt tools cmake
+qhp.qtcmake.subprojects         = manual
+qhp.qtcmake.subprojects.manual.title = Manual
+qhp.qtcmake.subprojects.manual.indexTitle = Build with CMake
+qhp.qtcmake.subprojects.manual.selectors = fake:page
+
+sources                 = cmake-manual.qdoc
+
+exampledirs             = .
+
+# Instruct Clang not to look for a module header
+moduleheader =
+
+depends += \
+    qtdoc \
+    qtcore \
+    qtnetwork \
+    qtsql \
+    qtgui \
+    qtwidgets \
+    qtdbus \
+    qtlinguist
+
+navigation.landingpage = "Build with CMake"

qtdoc.pro

@@ -1,3 +1,9 @@
 load(qt_parts)
 
-SUBDIRS += doc
+cmake.file = doc/src/cmake/cmake.pro
+
+doc.file = doc/doc.pro
+doc.depends = cmake
+
+SUBDIRS += doc cmake
+