API: Allow synchronous retrieval of build graph data

This is needed to import builds into Qt Creator.

Task-number: QBS-1059
Change-Id: I8a1b226d3f0044c7e90a61d195796a1e8be9a9de
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

2 files changed, 56 insertions, 1 deletions

diff --git a/src/lib/corelib/api/project.cpp b/src/lib/corelib/api/project.cpp
index f06a0126e..88f2c689e 100644
--- a/src/lib/corelib/api/project.cpp
+++ b/src/lib/corelib/api/project.cpp
@@ -51,6 +51,7 @@
 #include "runenvironment.h"
 #include <buildgraph/artifact.h>
 #include <buildgraph/buildgraph.h>
+#include <buildgraph/buildgraphloader.h>
 #include <buildgraph/emptydirectoriesremover.h>
 #include <buildgraph/nodetreedumper.h>
 #include <buildgraph/productbuilddata.h>
@@ -82,6 +83,8 @@
 #include <QtCore/qshareddata.h>
 
 #include <mutex>
+#include <utility>
+#include <vector>
 
 namespace qbs {
 namespace Internal {
@@ -1132,6 +1135,44 @@ ErrorInfo Project::dumpNodesTree(QIODevice &outDevice, const QList<ProductData>
     return ErrorInfo();
 }
 
+Project::BuildGraphInfo Project::getBuildGraphInfo(const QString &bgFilePath,
+                                                   const QStringList &requestedProperties)
+{
+    BuildGraphInfo info;
+    try {
+        const Internal::TopLevelProjectConstPtr project = BuildGraphLoader::loadProject(bgFilePath);
+        info.bgFilePath = bgFilePath;
+        info.overriddenProperties = project->overriddenValues;
+        info.profileData = project->profileConfigs;
+        std::vector<std::pair<QString, QString>> props;
+        for (const QString &prop : requestedProperties) {
+            QStringList components = prop.split(QLatin1Char('.'));
+            const QString propName = components.takeLast();
+            props.push_back(std::make_pair(components.join(QLatin1Char('.')), propName));
+        }
+        for (const ResolvedProductConstPtr &product : project->allProducts()) {
+            if (props.empty())
+                break;
+            if (product->profile != project->profile())
+                continue;
+            for (auto it = props.begin(); it != props.end();) {
+                const QVariant value
+                        = product->moduleProperties->moduleProperty(it->first, it->second);
+                if (value.isValid()) {
+                    info.requestedProperties.insert(it->first + QLatin1Char('.') + it->second,
+                                                    value);
+                    it = props.erase(it);
+                } else {
+                    ++it;
+                }
+            }
+        }
+    } catch (const ErrorInfo &e) {
+        info.error = e;
+    }
+    return info;
+}
+
 #ifdef QBS_ENABLE_PROJECT_FILE_UPDATES
 /*!
  * \brief Adds a new empty group to the given product.
diff --git a/src/lib/corelib/api/project.h b/src/lib/corelib/api/project.h
index 5456da335..034db2625 100644
--- a/src/lib/corelib/api/project.h
+++ b/src/lib/corelib/api/project.h
@@ -41,6 +41,7 @@
 
 #include "rulecommand.h"
 #include "../language/forward_decls.h"
+#include "../tools/error.h"
 #include "../tools/qbs_export.h"
 
 #include <QtCore/qshareddata.h>
@@ -62,7 +63,6 @@ class BuildJob;
 class BuildOptions;
 class CleanJob;
 class CleanOptions;
-class ErrorInfo;
 class GroupData;
 class ILogSink;
 class InstallJob;
@@ -139,6 +139,20 @@ public:
 
     ErrorInfo dumpNodesTree(QIODevice &outDevice, const QList<ProductData> &products);
 
+
+    class BuildGraphInfo
+    {
+    public:
+        QString bgFilePath;
+        QVariantMap overriddenProperties;
+        QVariantMap profileData;
+        QVariantMap requestedProperties;
+        ErrorInfo error;
+    };
+    static BuildGraphInfo getBuildGraphInfo(const QString &bgFilePath,
+                                            const QStringList &requestedProperties);
+
+
 #ifdef QBS_ENABLE_PROJECT_FILE_UPDATES
     ErrorInfo addGroup(const ProductData &product, const QString &groupName);
     ErrorInfo addFiles(const ProductData &product, const GroupData &group,