Hash intermediate file name to avoid ENAMETOOLONG

pylib/gyp/generator/make.py

Index: pylib/gyp/generator/make.py
diff --git a/pylib/gyp/generator/make.py b/pylib/gyp/generator/make.py
index b7da768fb33f5a8e12ec6ffa4c20e2fc6c1434e8..d5b200ad553369daa48b767582ce510fa4a78229 100644
--- a/pylib/gyp/generator/make.py
+++ b/pylib/gyp/generator/make.py
@@ -31,6 +31,17 @@ import gyp.xcode_emulation
 from gyp.common import GetEnvironFallback
 from gyp.common import GypError
 
+# hashlib is supplied as of Python 2.5 as the replacement interface for sha
+# and other secure hashes.  In 2.6, sha is deprecated.  Import hashlib if

[thefourtheye, 2016/06/29 19:31:40]

Nit: `sha` is deprecated since 2.5, as per the docs
https://docs.python.org/2/library/sha.html

[Anna Henningsen, 2016/06/29 23:54:03]

This comment is taken verbatim from `xcodeproj_file.py`, and I believe it is
referring to hard deprecation (i.e. with a possible deprecation warning) rather
than the docs-only deprecation. Should I update the orignal file too or leave it
as it is?

+# available, avoiding a deprecation warning under 2.6.  Import sha otherwise,
+# preserving 2.4 compatibility.

[Nico, 2016/10/10 14:59:51]

I don't think we care about 2.4 compat. I think several pieces in gyp assume
we're on 2.7

+try:
+  import hashlib
+  _new_sha1 = hashlib.sha1
+except ImportError:
+  import sha
+  _new_sha1 = sha.new
+
 generator_default_variables = {
   'EXECUTABLE_PREFIX': '',
   'EXECUTABLE_SUFFIX': '',
@@ -1743,7 +1754,10 @@ $(obj).$(TOOLSET)/$(TARGET)/%%.o: $(obj)/%%%s FORCE_DO_CMD
       #   actual command.
       # - The intermediate recipe will 'touch' the intermediate file.
       # - The multi-output rule will have an do-nothing recipe.
-      intermediate = "%s.intermediate" % (command if command else self.target)
+
+      # Hash the target name to avoid generating overlong filenames.
+      cmddigest = _new_sha1(command if command else self.target).hexdigest()
+      intermediate = "%s.intermediate" % (cmddigest)
       self.WriteLn('%s: %s' % (' '.join(outputs), intermediate))
       self.WriteLn('\t%s' % '@:');
       self.WriteLn('%s: %s' % ('.INTERMEDIATE', intermediate))