Add swiftc tool

site_scons/site_init.py

@@ -184,7 +184,7 @@ class Environment(SCons.Environment.Environment):
     def _append_custom_tools(self, kwargs):
         '''Add custom tools to the `kwargs`.'''
         tools = kwargs.setdefault('tools', ['default'])
-        for tool in ['lib', 'test', 'program', 'sconscript']:
+        for tool in ['lib', 'test', 'program', 'sconscript', 'swiftc']:
             if tool in tools:
                 continue
             tools.append(tool)

site_scons/site_tools/swiftc.py

@@ -0,0 +1,33 @@
+# swiftc.py
+# vim: set ft=python:
+# Eryn Wells <eryn@erynwells.me>
+
+'''
+SCons plugin for building Swift files with swiftc.
+'''
+
+import SCons.Action
+import SCons.Tool
+import SCons.Util
+
+SwiftSuffix = '.swift'
+SwiftAction = SCons.Action.Action("$SWIFTCCOM", "$SWIFTCCOMSTR")
+
+compilers = ['swiftc']
+
+def generate(env):
+    static_obj, shared_obj = SCons.Tool.createObjBuilders(env)
+    static_obj.add_action(SwiftSuffix, SwiftAction)
+    static_obj.add_emitter(SwiftSuffix, SCons.Defaults.SharedObjectEmitter)
+    shared_obj.add_action(SwiftSuffix, SwiftAction)
+    shared_obj.add_emitter(SwiftSuffix, SCons.Defaults.SharedObjectEmitter)
+
+    if 'SWIFTC' not in env:
+        compiler = env.Detect(compilers)
+        env['SWIFTC'] = compiler if compiler else compilers[0]
+    env['SWIFTFLAGS'] = SCons.Util.CLVar('')
+    env['SWIFTCCOM']   = '$SWIFTC -o $TARGET -c $SWIFTFLAGS $SOURCES'
+    env['SWIFTFILESUFFIX'] = SwiftSuffix
+
+def exists(env):
+    return env.Detect(compilers)