Extend Win32 long command-line processing to lib.py. (Matt Balvin)

1 files changed, 24 insertions, 0 deletions

diff --git a/src/engine/SCons/Platform/win32.py b/src/engine/SCons/Platform/win32.py
index b54aefe..db601e1 100644
--- a/src/engine/SCons/Platform/win32.py
+++ b/src/engine/SCons/Platform/win32.py
@@ -38,6 +38,30 @@ import os.path
 import string
 import sys
 
+#
+
+def TempFileMunge(env, cmd_list, for_signature): 
+    """Given a list of command line arguments, see if it is too
+    long to pass to the win32 command line interpreter.  If so,
+    create a temp file, then pass "@tempfile" as the sole argument
+    to the supplied command (which is the first element of cmd_list).
+    Otherwise, just return [cmd_list]."""
+    cmd = env.subst_list(cmd_list)[0]
+    if for_signature or \
+       (reduce(lambda x, y: x + len(y), cmd, 0) + len(cmd)) <= 2048:
+        return [cmd_list]
+    else:
+        import tempfile
+        # We do a normpath because mktemp() has what appears to be
+        # a bug in Win32 that will use a forward slash as a path
+        # delimiter.  Win32's link mistakes that for a command line
+        # switch and barfs.
+        tmp = os.path.normpath(tempfile.mktemp())
+        args = map(SCons.Util.quote_spaces, cmd[1:])
+        open(tmp, 'w').write(string.join(args, " ") + "\n")
+        return [ [cmd[0], '@' + tmp],
+                 ['del', tmp] ]
+
 # The upshot of all this is that, if you are using Python 1.5.2,
 # you had better have cmd or command.com in your PATH when you run
 # scons.