add code generator example

Change-Id: I78c2aec4466499871bc03b7ca35a38086a1fb548
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>

3 files changed, 86 insertions, 0 deletions

diff --git a/examples/code-generator/code-generator.qbs b/examples/code-generator/code-generator.qbs
new file mode 100644
index 000000000..feebfee33
--- /dev/null
+++ b/examples/code-generator/code-generator.qbs
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Build Suite.
+**
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+****************************************************************************/
+import qbs
+
+Project {
+    // A code generator that outputs a "Hello World" C++ program.
+    CppApplication {
+        name: "hwgen"
+        files: ["hwgen.cpp"]
+    }
+
+    // Generate and build a hello-world application.
+    CppApplication {
+        name: "hello-world"
+        Depends { name: "hwgen" }
+        Rule {
+            inputs: ["qbs"]     // needed to trigger this rule
+            Artifact {
+                filePath: "main.cpp"
+                fileTags: ["cpp"]
+            }
+            prepare: {
+                var hwgen;
+                for (var i in product.dependencies) {
+                    var dep = product.dependencies[i];
+                    if (dep.name != "hwgen")
+                        continue;
+                    hwgen = dep.buildDirectory + "/" + dep.targetName;
+                }
+                var cmd = new Command(hwgen, [output.filePath]);
+                cmd.description = "generating C++ source";
+                return cmd;
+            }
+        }
+    }
+}
diff --git a/examples/code-generator/hwgen.cpp b/examples/code-generator/hwgen.cpp
new file mode 100644
index 000000000..e71c1d9ed
--- /dev/null
+++ b/examples/code-generator/hwgen.cpp
@@ -0,0 +1,15 @@
+#include <cstdio>
+
+int main(int argc, char **argv)
+{
+    if (argc < 2)
+        return 1;
+    FILE *f = fopen(argv[1], "w");
+    if (!f)
+        return 2;
+    fprintf(f, "#include <cstdio>\n\n"
+               "int main()\n"
+               "{\n    printf(\"Hello World!\\n\");\n    return 0;\n}\n");
+    fclose(f);
+    return 0;
+}
diff --git a/examples/examples.qbs b/examples/examples.qbs
index 80b80dccb..d11b4a8a6 100644
--- a/examples/examples.qbs
+++ b/examples/examples.qbs
@@ -41,6 +41,7 @@ Project {
     references: [
         "app-and-lib/app_and_lib.qbs",
         "cocoa-application/CocoaApplication.qbs",
+        "code-generator/code-generator.qbs",
         "collidingmice/collidingmice.qbs",
         "helloworld-complex/hello.qbs",
         "helloworld-minimal/hello.qbs",