Compute command line that should be passed to child setup scripts.

Warn user if unsupported options are supplied, and cancel unless
'depends -i' (aka '--ignore-extra-args') was used.

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4040880

1 files changed, 41 insertions, 0 deletions

diff --git a/setuptools/dist.py b/setuptools/dist.py
index cd3af266..cb5a906b 100644
--- a/setuptools/dist.py
+++ b/setuptools/dist.py
@@ -285,6 +285,47 @@ class Distribution(_Distribution):
 
 
 
+    def get_cmdline_options(self):
+        """Return a '{cmd: {opt:val}}' map of all command-line options
+
+        Option names are all long, but do not include the leading '--', and
+        contain dashes rather than underscores.  If the option doesn't take
+        an argument (e.g. '--quiet'), the 'val' is 'None'.
+
+        Note that options provided by config files are intentionally excluded.
+        """
+
+        d = {}
+
+        for cmd,opts in self.command_options.items():
+
+            for opt,(src,val) in opts.items():
+
+                if src != "command line":
+                    continue
+
+                opt = opt.replace('_','-')
+
+                if val==0:
+                    cmdobj = self.get_command_obj(cmd)
+                    neg_opt = self.negative_opt.copy()
+                    neg_opt.update(getattr(cmdobj,'negative_opt',{}))
+                    for neg,pos in neg_opt.items():
+                        if pos==opt:
+                            opt=neg
+                            val=None
+                            break
+                    else:
+                        raise AssertionError("Shouldn't be able to get here")
+
+                elif val==1:
+                    val = None
+
+                d.setdefault(cmd,{})[opt] = val
+
+        return d
+
+
 class Feature:
     """A subset of the distribution that can be excluded if unneeded/wanted