Build documentation also when using qbs.

Change-Id: I17330fa27effc633a06bc8f0a5864e771b831476
Reviewed-by: Jake Petroules <jake.petroules@qt.io>

doc/doc.qbs

+import qbs
+
+Project {
+    name: "documentation"
+
+    QtcDocumentation {
+        name: "user doc online"
+        isOnlineDoc: true
+        mainDocConfFile: "qtcreator-online.qdocconf"
+
+        files: [
+            "src/**/*",
+        ]
+    }
+
+    QtcDocumentation {
+        name: "user doc offline"
+        isOnlineDoc: false
+        mainDocConfFile: "qtcreator.qdocconf"
+
+        files: [
+            "src/**/*",
+        ]
+    }
+
+    QtcDocumentation {
+        name: "API doc online"
+        isOnlineDoc: true
+        mainDocConfFile: "api/qtcreator-dev-online.qdocconf"
+
+        Group {
+            name: "sources"
+            files: [
+                "api/*.qdoc",
+                "api/**/*",
+            ]
+            excludeFiles: [mainDocConfFile]
+        }
+    }
+
+    QtcDocumentation {
+        name: "API doc offline"
+        isOnlineDoc: false
+        mainDocConfFile: "api/qtcreator-dev.qdocconf"
+
+        Group {
+            name: "sources"
+            files: [
+                "api/*.qdoc",
+                "api/**/*",
+            ]
+            excludeFiles: [mainDocConfFile]
+        }
+    }
+}

qbs/imports/QtcDocumentation.qbs

+import qbs
+
+Product {
+    builtByDefault: false
+    type: [isOnlineDoc ? "qdoc-output" : "qch"]
+    Depends { name: "Qt.core" }
+
+    property path mainDocConfFile
+    property bool isOnlineDoc
+
+    Group {
+        name: "main qdocconf file"
+        files: [mainDocConfFile]
+        fileTags: ["qdocconf-main"]
+    }
+
+    property string versionTag: project.qtcreator_version.replace(/\.|-/g, "")
+    Qt.core.qdocEnvironment: [
+        "QTC_LICENSE_TYPE=" + project.licenseType,
+        "QTC_VERSION=" + project.qtcreator_version,
+        "QTC_VERSION_TAG=" + project.qtcreator_version,
+        "SRCDIR=" + sourceDirectory,
+        "QT_INSTALL_DOCS=" + Qt.core.docPath,
+        "QDOC_INDEX_DIR=" + Qt.core.docPath,
+        "VERSION_TAG=" + versionTag
+    ]
+
+    Group {
+        fileTagsFilter: ["qch"]
+        qbs.install: !qbs.targetOS.contains("osx")
+        qbs.installDir: project.ide_doc_path
+    }
+}

qtcreator.qbs

@@ -6,6 +6,7 @@ Project {
     name: "Qt Creator"
     minimumQbsVersion: "1.5.0"
     property bool withAutotests: qbs.buildVariant === "debug"
+    property string licenseType: "opensource"
     property string ide_version_major: '4'
     property string ide_version_minor: '0'
     property string ide_version_release: '82'
@@ -62,6 +63,7 @@ Project {
     qbsSearchPaths: "qbs"
 
     references: [
+        "doc/doc.qbs",
         "src/src.qbs",
         "share/share.qbs",
         "share/qtcreator/translations/translations.qbs",