[scons] Fix duplicate compilation for image/xpcc tools

tools/build_script_generator/scons/module.lb

@@ -76,6 +76,7 @@ def build(env):
 
 def post_build(env, buildlog):
     is_unittest = env.has_module(":test")
+    has_image_source = len(env[":::image.source"])
 
     target = env["modm:target"]
     subs = common_target(target)
@@ -90,7 +91,7 @@ def post_build(env, buildlog):
     ]
     if len(env[":::xpcc.source"]):
         build_tools += ["system_design"]
-    if len(env[":::image.source"]):
+    if has_image_source:
         build_tools += ["bitmap"]
     if env[":::info.git"] != "Disabled" or env[":::info.build"]:
         build_tools += ["info"]
@@ -116,6 +117,8 @@ def post_build(env, buildlog):
         "metadata": buildlog.metadata,
         "build_tools": build_tools,
         "is_unittest": is_unittest,
+        "has_image_source": has_image_source,
+        "image_source": env[":::image.source"],
     })
     # Set these substitutions for all templates
     env.substitutions = subs

tools/build_script_generator/scons/resources/SConstruct.in

@@ -41,34 +41,43 @@ env.InfoBuild()
 headers = env.FindHeaderFiles(join(modm_path, "test"))
 sources = env.UnittestRunner(target="main.cpp", source=headers, template="modm/test/runner.cpp.in")
 %% else
-# Finding application sources
 env.Append(CPPPATH=".")
-sources = env.FindSourceFiles(".", ignorePaths=["modm", "cmake-build-*", "build"])
+ignored = ["modm", "cmake-build-*", "build"]
+sources = []
 %% endif
 
-%% if options[":::image.source"] != ""
-# Finding image sources
-for image in env.FindFiles("{{ options[":::image.source"] }}", ".pbm"):
+%% if has_image_source
+# Generating image sources
+env.Append(CPPPATH="{{ image_source }}")
+ignored.append("{{ image_source }}")
+for image in env.FindFiles("{{ image_source }}", ".pbm"):
     source, _ = env.Bitmap(str(image))
     sources.append(source)
 %% endif
 %% if options[":::xpcc.source"] != ""
 # Generating XPCC sources
+env.Append(CPPPATH="{{ options[":::xpcc.generate"] }}")
+ignored.append("{{ options[":::xpcc.generate"] }}")
 sources += env.XpccCommunication(
     xmlfile=abspath("{{ options[":::xpcc.source"] }}"),
     container="{{ options[":::xpcc.container"] }}",
     path=abspath("{{ options[":::xpcc.generate"] }}"),
     namespace="{{ options[":::xpcc.namespace"] }}")
 %% endif
 
+%% if not is_unittest
+# Finding application sources
+sources += env.FindSourceFiles(".", ignorePaths=ignored)
+%% endif
+
+# Building application
+program = env.Program(target=project_name+".elf", source=sources)
+
 %% if openocd_file != ""
 # Using a custom OpenOCD script
 env.Append(CONFIG_OPENOCD_SEARCHDIRS=[abspath("{{openocd_base_dir}}")])
 env.Append(CONFIG_OPENOCD_CONFIGFILES=["{{openocd_file}}"])
 %% endif
-%#
-# Building application
-program = env.Program(target=project_name+".elf", source=sources)
 
 # SCons functions
 env.Alias("cmakewrapper", env.CMakeWrapper())