Expose Subversion revision number (calculated via "svnversion .") to Python.

Add C API function Py_GetBuildNumber(), add it to the interactive prompt
banner (i.e. Py_GetBuildInfo()), and add it as the sys.build_number
attribute.  The build number is a string instead of an int because it may
contain a trailing 'M' if there are local modifications.

2 files changed, 12 insertions, 0 deletions

diff --git a/Doc/api/init.tex b/Doc/api/init.tex
index 51b925f..67f74a1 100644
--- a/Doc/api/init.tex
+++ b/Doc/api/init.tex
@@ -272,6 +272,12 @@
   \withsubitem{(in module sys)}{\ttindex{version}}
 \end{cfuncdesc}
 
+\begin{cfuncdesc}{const char*}{Py_GetBuildNumber}{}
+  Return a string representing the Subversion revision that this Python
+  executable was built from.  This number is a string because it may contain a
+  trailing 'M' if Python was built from a mixed revision source tree.
+\end{cfuncdesc}
+
 \begin{cfuncdesc}{const char*}{Py_GetPlatform}{}
   Return the platform identifier for the current platform.  On \UNIX,
   this is formed from the ``official'' name of the operating system,
diff --git a/Doc/lib/libsys.tex b/Doc/lib/libsys.tex
index 4efe5f6..7ffa35d 100644
--- a/Doc/lib/libsys.tex
+++ b/Doc/lib/libsys.tex
@@ -27,6 +27,12 @@ It is always available.
   \versionadded{2.0}
 \end{datadesc}
 
+\begin{datadesc}{build_number}
+  A string representing the Subversion revision that this Python executable
+  was built from.  This number is a string because it may contain a trailing
+  'M' if Python was built from a mixed revision source tree.
+\end{datadesc}  
+
 \begin{datadesc}{builtin_module_names}
   A tuple of strings giving the names of all modules that are compiled
   into this Python interpreter.  (This information is not available in