add $$shadowed() function

return the build directory corresponding to a given source directory.
this is the identity function if not shadow-building. if input lies
outside the source directory, return empty value.

Change-Id: I2d2a6b1112bd19989fe29cfe19a12d39a0d208c1
Reviewed-by: Marius Storm-Olsen <marius.storm-olsen@nokia.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/qmake/option.cpp b/qmake/option.cpp
index 836cc3f492..a22d184456 100644
--- a/qmake/option.cpp
+++ b/qmake/option.cpp
@@ -115,6 +115,8 @@ bool Option::mkfile::do_dep_heuristics = true;
 bool Option::mkfile::do_preprocess = false;
 bool Option::mkfile::do_stub_makefile = false;
 bool Option::mkfile::do_cache = true;
+QString Option::mkfile::source_root;
+QString Option::mkfile::build_root;
 QString Option::mkfile::cachefile;
 QStringList Option::mkfile::project_files;
 QString Option::mkfile::qmakespec_commandline;
@@ -594,6 +596,29 @@ void Option::applyHostMode()
    }
 }
 
+void Option::prepareProject(const QString &pfile)
+{
+    QString srcpath = (pfile != "-")
+            ? QDir::cleanPath(QFileInfo(pfile).absolutePath()) : qmake_getpwd();
+    if (srcpath != output_dir) {
+        if (!srcpath.endsWith(QLatin1Char('/')))
+            srcpath += QLatin1Char('/');
+        QString dstpath = output_dir;
+        if (!dstpath.endsWith(QLatin1Char('/')))
+            dstpath += QLatin1Char('/');
+        int srcLen = srcpath.length();
+        int dstLen = dstpath.length();
+        int lastSl = 0;
+        while (++lastSl, srcpath.at(--srcLen) == dstpath.at(--dstLen))
+            if (srcpath.at(srcLen) == QLatin1Char('/'))
+                lastSl = 1;
+        mkfile::source_root = srcpath.left(srcLen + lastSl);
+        mkfile::build_root = dstpath.left(dstLen + lastSl);
+    } else {
+        mkfile::source_root.clear();
+    }
+}
+
 bool Option::postProcessProject(QMakeProject *project)
 {
     Option::cpp_ext = project->variables()["QMAKE_EXT_CPP"];