Debugger: check for python when builing cdbext with qbs

Change-Id: Ife169124f9fcd885774cd39698281e9a64e4545b
Reviewed-by: David Schulz <david.schulz@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>

src/libs/qtcreatorcdbext/qtcreatorcdbext.qbs

@@ -2,6 +2,8 @@ import qbs
 import qbs.Environment
 import qbs.File
 import qbs.FileInfo
+import qbs.Process
+import qbs.Utilities
 
 QtcLibrary {
     condition: qbs.toolchain.contains("msvc") && cdbPath
@@ -45,11 +47,95 @@ QtcLibrary {
         }
         return undefined;
     }
-    cpp.includePaths: [FileInfo.joinPaths(cdbPath, "inc")]
-    cpp.dynamicLibraries: [
-        "user32.lib",
-        FileInfo.joinPaths(cdbLibPath, "dbgeng.lib")
-    ]
+
+    property string pythonInstallDir: Environment.getEnv("PYTHON_INSTALL_DIR")
+
+    Probe {
+        id: pythonDllProbe
+        condition: product.condition
+        property string pythonDir: pythonInstallDir // Input
+        property string buildVariant: qbs.buildVariant // Input
+        property string fileNamePrefix // Output
+        configure: {
+            function printWarning(msg) {
+                console.warn(msg + " The python dumpers for cdb will not be available.");
+            }
+
+            if (!pythonDir) {
+                printWarning("PYTHON_INSTALL_DIR not set.");
+                return;
+            }
+            if (!File.exists(pythonDir)) {
+                printWarning("The provided python installation directory '" + pythonDir
+                             + "' does not exist.");
+                return;
+            }
+            var p = new Process();
+            try {
+                var pythonFilePath = FileInfo.joinPaths(pythonDir, "python.exe");
+                p.exec(pythonFilePath, ["--version"], true);
+                var output = p.readStdOut().trim();
+                var magicPrefix = "Python ";
+                if (!output.startsWith(magicPrefix)) {
+                    printWarning("Unexpected python output when checking for version: '"
+                                 + output + "'");
+                    return;
+                }
+                var versionNumberString = output.slice(magicPrefix.length);
+                var versionNumbers = versionNumberString.split('.');
+                if (versionNumbers.length < 2) {
+                    printWarning("Unexpected python output when checking for version: '"
+                            + output + "'");
+                    return;
+                }
+                if (Utilities.versionCompare(versionNumberString, "3.5") < 0) {
+                    printWarning("The python installation at '" + pythonDir
+                                 + "' has version " + versionNumberString + ", but 3.5 or higher "
+                                 + "is required.");
+                    return;
+                }
+                found = true;
+                fileNamePrefix = "python" + versionNumbers[0] + versionNumbers[1];
+                if (buildVariant === "debug")
+                    fileNamePrefix += "_d"
+            } finally {
+                p.close();
+            }
+
+        }
+    }
+
+    Group {
+        name: "pythonDumper"
+        condition: pythonDllProbe.found
+        files: [
+            "pycdbextmodule.cpp",
+            "pycdbextmodule.h",
+            "pyfield.cpp",
+            "pyfield.h",
+            "pystdoutredirect.cpp",
+            "pystdoutredirect.h",
+            "pytype.cpp",
+            "pytype.h",
+            "pyvalue.cpp",
+            "pyvalue.h",
+        ]
+    }
+
+    cpp.defines: ["WITH_PYTHON=1"]
+    cpp.includePaths: {
+        var paths = [FileInfo.joinPaths(cdbPath, "inc")];
+        if (pythonDllProbe.found)
+            paths.push(FileInfo.joinPaths(pythonInstallDir, "include"));
+        return paths;
+    }
+    cpp.dynamicLibraries: {
+        var libs = [ "user32.lib", FileInfo.joinPaths(cdbLibPath, "dbgeng.lib") ];
+        if (pythonDllProbe.found)
+            libs.push(FileInfo.joinPaths(pythonInstallDir, "libs",
+                                         pythonDllProbe.fileNamePrefix + ".lib"));
+        return libs;
+    }
     cpp.linkerFlags: ["/DEF:" + FileInfo.toWindowsSeparators(
                                     FileInfo.joinPaths(product.sourceDirectory,
                                                        "qtcreatorcdbext.def"))]
@@ -61,6 +147,16 @@ QtcLibrary {
             dirName += "32";
         return FileInfo.joinPaths(qtc.libDirName, dirName);
     }
+
+    Group {
+        condition: pythonDllProbe.found
+        files: [FileInfo.joinPaths(pythonInstallDir, pythonDllProbe.fileNamePrefix + ".dll")]
+        qbs.install: true
+        qbs.installDir: installDir
+    }
+
+    useNonGuiPchFile: false
+
     files: [
         "common.cpp",
         "common.h",