From 3faecf9a00512dcbc8712c4bca9adae72fb64410 Mon Sep 17 00:00:00 2001
From: Kenneth Heafield <github@kheafield.com>
Date: Sat, 12 May 2012 14:01:52 -0400
Subject: Give in and copy bjam into cdec source code

---
 jam-files/boost-build/util/__init__.py | 136 +++++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 jam-files/boost-build/util/__init__.py

(limited to 'jam-files/boost-build/util/__init__.py')

diff --git a/jam-files/boost-build/util/__init__.py b/jam-files/boost-build/util/__init__.py
new file mode 100644
index 00000000..f80fe70e
--- /dev/null
+++ b/jam-files/boost-build/util/__init__.py
@@ -0,0 +1,136 @@
+
+import bjam
+import re
+import types
+
+# Decorator the specifies bjam-side prototype for a Python function
+def bjam_signature(s):
+
+    def wrap(f):       
+        f.bjam_signature = s
+        return f
+
+    return wrap
+
+def metatarget(f):
+
+    f.bjam_signature = (["name"], ["sources", "*"], ["requirements", "*"],
+                        ["default_build", "*"], ["usage_requirements", "*"])
+    return f
+
+class cached(object):
+
+    def __init__(self, function):
+        self.function = function
+        self.cache = {}
+
+    def __call__(self, *args):
+        try:
+            return self.cache[args]
+        except KeyError:
+            v = self.function(*args)
+            self.cache[args] = v
+            return v
+
+    def __get__(self, instance, type):
+        return types.MethodType(self, instance, type)
+
+def unquote(s):
+    if s and s[0] == '"' and s[-1] == '"':
+        return s[1:-1]
+    else:
+        return s
+
+_extract_jamfile_and_rule = re.compile("(Jamfile<.*>)%(.*)")
+
+def qualify_jam_action(action_name, context_module):
+
+    if action_name.startswith("###"):
+        # Callable exported from Python. Don't touch
+        return action_name
+    elif _extract_jamfile_and_rule.match(action_name):
+        # Rule is already in indirect format
+        return action_name
+    else:
+        ix = action_name.find('.')
+        if ix != -1 and action_name[:ix] == context_module:
+            return context_module + '%' + action_name[ix+1:]
+        
+        return context_module + '%' + action_name        
+    
+
+def set_jam_action(name, *args):
+
+    m = _extract_jamfile_and_rule.match(name)
+    if m:
+        args = ("set-update-action-in-module", m.group(1), m.group(2)) + args
+    else:
+        args = ("set-update-action", name) + args
+
+    return bjam.call(*args)
+
+
+def call_jam_function(name, *args):
+
+    m = _extract_jamfile_and_rule.match(name)
+    if m:
+        args = ("call-in-module", m.group(1), m.group(2)) + args
+        return bjam.call(*args)
+    else:
+        return bjam.call(*((name,) + args))
+
+__value_id = 0
+__python_to_jam = {}
+__jam_to_python = {}
+
+def value_to_jam(value, methods=False):
+    """Makes a token to refer to a Python value inside Jam language code.
+
+    The token is merely a string that can be passed around in Jam code and
+    eventually passed back. For example, we might want to pass PropertySet
+    instance to a tag function and it might eventually call back
+    to virtual_target.add_suffix_and_prefix, passing the same instance.
+
+    For values that are classes, we'll also make class methods callable
+    from Jam.
+
+    Note that this is necessary to make a bit more of existing Jamfiles work.
+    This trick should not be used to much, or else the performance benefits of
+    Python port will be eaten.
+    """
+
+    global __value_id
+
+    r = __python_to_jam.get(value, None)
+    if r:
+        return r
+
+    exported_name = '###_' + str(__value_id)
+    __value_id = __value_id + 1
+    __python_to_jam[value] = exported_name
+    __jam_to_python[exported_name] = value
+
+    if methods and type(value) == types.InstanceType:
+        for field_name in dir(value):
+            field = getattr(value, field_name)
+            if callable(field) and not field_name.startswith("__"):
+                bjam.import_rule("", exported_name + "." + field_name, field)
+
+    return exported_name
+
+def record_jam_to_value_mapping(jam_value, python_value):
+    __jam_to_python[jam_value] = python_value
+
+def jam_to_value_maybe(jam_value):
+
+    if type(jam_value) == type(""):
+        return __jam_to_python.get(jam_value, jam_value)
+    else:
+        return jam_value
+
+def stem(filename):
+    i = filename.find('.')
+    if i != -1:
+        return filename[0:i]
+    else:
+        return filename
-- 
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