Very preliminary work for ninja on Windows

pylib/gyp/generator/ninja.py

Index: pylib/gyp/generator/ninja.py
===================================================================
--- pylib/gyp/generator/ninja.py	(revision 1197)
+++ pylib/gyp/generator/ninja.py	(working copy)
@@ -76,7 +76,7 @@
     return path
   # Only need to handle relative paths into subdirectories for now.
   assert '..' not in path, path
-  depth = len(path.split('/'))
+  depth = len(path.split(os.path.sep))
   return '/'.join(['..'] * depth)
 
 
@@ -180,6 +180,7 @@
     self.ninja = ninja_syntax.Writer(output_file)
     self.flavor = flavor
     self.abs_build_dir = abs_build_dir
+    self.obj_ext = '.obj' if flavor == 'win' else '.o'
 
     # Relative path from build output dir to base dir.
     self.build_to_base = os.path.join(InvertRelativePath(build_dir), base_dir)
@@ -348,7 +349,8 @@
               self.xcode_settings, self.GypPathToNinja,
               lambda path, lang: self.GypPathToUniqueOutput(path + '-' + lang)))
       # Some actions/rules output 'sources' that are already object files.
-      link_deps += [self.GypPathToNinja(f) for f in sources if f.endswith('.o')]
+      link_deps += [self.GypPathToNinja(f)
+          for f in sources if f.endswith(self.obj_ext)]
 
     # Write out a link step, if needed.
     output = None
@@ -627,7 +629,7 @@
         # TODO: should we assert here on unexpected extensions?
         continue
       input = self.GypPathToNinja(source)
-      output = self.GypPathToUniqueOutput(filename + '.o')
+      output = self.GypPathToUniqueOutput(filename + self.obj_ext)
       implicit = precompiled_header.GetObjDependencies([input], [output])
       self.ninja.build(output, command, input,
                        implicit=[gch for _, _, gch in implicit],
@@ -966,6 +968,12 @@
     global generator_extra_sources_for_rules
     generator_extra_sources_for_rules = getattr(xcode_generator,
         'generator_extra_sources_for_rules', [])
+  elif flavor == 'win':
+    default_variables.setdefault('EXECUTABLE_SUFFIX', '.exe')
+    default_variables.setdefault('STATIC_LIB_PREFIX', '')
+    default_variables.setdefault('STATIC_LIB_SUFFIX', '.lib')
+    default_variables.setdefault('SHARED_LIB_PREFIX', '')
+    default_variables.setdefault('SHARED_LIB_SUFFIX', '.dll')
   else:
     operating_system = flavor
     if flavor == 'android':
@@ -1004,7 +1012,10 @@
   gyp.common.CopyTool(flavor, os.path.join(options.toplevel_dir, build_dir))
 
   # Grab make settings for CC/CXX.
-  cc, cxx = 'gcc', 'g++'
+  if flavor == 'win':
+    cc = cxx = 'cl'
+  else:
+    cc, cxx = 'gcc', 'g++'
   build_file, _, _ = gyp.common.ParseQualifiedTarget(target_list[0])
   make_global_settings = data[build_file].get('make_global_settings', [])
   build_to_root = InvertRelativePath(build_dir)
@@ -1017,27 +1028,46 @@
     flock = './gyp-mac-tool flock'
   master_ninja.variable('cc', os.environ.get('CC', cc))
   master_ninja.variable('cxx', os.environ.get('CXX', cxx))
-  master_ninja.variable('ld', flock + ' linker.lock $cxx')
+  if flavor == 'win':
+    master_ninja.variable('ld', 'link')
+  else:
+    master_ninja.variable('ld', flock + ' linker.lock $cxx')
   master_ninja.variable('cc_host', '$cc')
   master_ninja.variable('cxx_host', '$cxx')
   if flavor == 'mac':
     master_ninja.variable('mac_tool', os.path.join('.', 'gyp-mac-tool'))
   master_ninja.newline()
 
-  master_ninja.rule(
-    'cc',
-    description='CC $out',
-    command=('$cc -MMD -MF $out.d $defines $includes $cflags $cflags_c '
-             '$cflags_pch_c -c $in -o $out'),
-    depfile='$out.d')
-  master_ninja.rule(
-    'cxx',
-    description='CXX $out',
-    command=('$cxx -MMD -MF $out.d $defines $includes $cflags $cflags_cc '
-             '$cflags_pch_cc -c $in -o $out'),
-    depfile='$out.d')
-  if flavor != 'mac':
+  if flavor != 'win':
     master_ninja.rule(
+      'cc',
+      description='CC $out',
+      command=('$cc -MMD -MF $out.d $defines $includes $cflags $cflags_c '
+              '$cflags_pch_c -c $in -o $out'),
+      depfile='$out.d')
+    master_ninja.rule(
+      'cxx',
+      description='CXX $out',
+      command=('$cxx -MMD -MF $out.d $defines $includes $cflags $cflags_cc '
+              '$cflags_pch_cc -c $in -o $out'),
+      depfile='$out.d')
+  else:
+    # TODO(scottmg): Decide how /showIncludes handling should work in ninja.
+    master_ninja.rule(
+      'cc',
+      description='CC $out',
+      command=('$cc /nologo $defines $includes $cflags $cflags_c '
+              '$cflags_pch_c /c $in /Fo$out'),
+      depfile='$out.d')
+    master_ninja.rule(
+      'cxx',
+      description='CXX $out',
+      command=('$cxx /nologo $defines $includes $cflags $cflags_cc '
+              '$cflags_pch_cc /c $in /Fo$out'),
+      depfile='$out.d')
+
+  if flavor != 'mac' and flavor != 'win':
+    master_ninja.rule(
       'alink',
       description='AR $out',
       command='rm -f $out && ar rcsT $out $in')
@@ -1056,6 +1086,23 @@
       description='LINK $out',
       command=('$ld $ldflags -o $out -Wl,-rpath=\$$ORIGIN/lib '
                '-Wl,--start-group $in -Wl,--end-group $libs'))
+  elif flavor == 'win':
+    master_ninja.rule(
+      'alink',
+      description='AR $out',
+      command='lib /nologo /OUT:$out.lib $in')
+    master_ninja.rule(
+      'solink',
+      description='SOLINK $out',
+      command=('$ld /nologo /DLL $ldflags /OUT:$out.dll $in $libs'))
+    master_ninja.rule(
+      'solink_module',
+      description='SOLINK(module) $out',
+      command=('$ld /nologo /DLL $ldflags /OUT:$out.dll $in $libs'))
+    master_ninja.rule(
+      'link',
+      description='LINK $out',
+      command=('$ld /nologo $ldflags /OUT:$out.exe $in $libs'))
   else:
     master_ninja.rule(
       'objc',
@@ -1110,10 +1157,17 @@
     'stamp',
     description='STAMP $out',
     command='${postbuilds}touch $out')
-  master_ninja.rule(
-    'copy',
-    description='COPY $in $out',
-    command='ln -f $in $out 2>/dev/null || (rm -rf $out && cp -af $in $out)')
+  if flavor == 'win':
+    # TODO(scottmg): Copy fallback?
+    master_ninja.rule(
+      'copy',
+      description='COPY $in $out',
+      command='mklink /h $out $in >nul')
+  else:
+    master_ninja.rule(
+      'copy',
+      description='COPY $in $out',
+      command='ln -f $in $out 2>/dev/null || (rm -rf $out && cp -af $in $out)')
   master_ninja.newline()
 
   all_targets = set()