Lay the groundwork for optimized source maps.

1 files changed, 13 insertions, 7 deletions

diff --git a/tools/js_optimizer.py b/tools/js_optimizer.py
index 0452a725..e99c02be 100644
--- a/tools/js_optimizer.py
+++ b/tools/js_optimizer.py
@@ -57,7 +57,7 @@ class Minifier:
           if curr not in INVALID_3: self.names.append(curr)
     #print >> sys.stderr, self.names
 
-  def minify_shell(self, shell, compress):
+  def minify_shell(self, shell, compress, debug=False):
     #print >> sys.stderr, "MINIFY SHELL 1111111111", shell, "\n222222222222222"
     # Run through js-optimizer.js to find and minify the global symbols
     # We send it the globals, which it parses at the proper time. JS decides how
@@ -77,7 +77,11 @@ class Minifier:
     f.write('// MINIFY_INFO:' + self.serialize())
     f.close()
 
-    output = subprocess.Popen(self.js_engine + [JS_OPTIMIZER, temp_file, 'minifyGlobals', 'noPrintMetadata'] + (['compress'] if compress else []), stdout=subprocess.PIPE).communicate()[0]
+    output = subprocess.Popen(self.js_engine +
+        [JS_OPTIMIZER, temp_file, 'minifyGlobals', 'noPrintMetadata'] +
+        (['compress'] if compress else []) +
+        (['--debug'] if debug else []),
+        stdout=subprocess.PIPE).communicate()[0]
     assert len(output) > 0 and not output.startswith('Assertion failed'), 'Error in js optimizer: ' + output
     #print >> sys.stderr, "minified SHELL 3333333333333333", output, "\n44444444444444444444"
     code, metadata = output.split('// MINIFY_INFO:')
@@ -103,7 +107,7 @@ def run_on_chunk(command):
   if DEBUG and not shared.WINDOWS: print >> sys.stderr, '.' # Skip debug progress indicator on Windows, since it doesn't buffer well with multiple threads printing to console.
   return filename
 
-def run_on_js(filename, passes, js_engine, jcache):
+def run_on_js(filename, passes, js_engine, jcache, debug=False):
   if isinstance(jcache, bool) and jcache: jcache = shared.JCache
   if jcache: shared.JCache.ensure()
 
@@ -171,7 +175,7 @@ EMSCRIPTEN_FUNCS();
       js = js[start_funcs + len(start_funcs_marker):end_funcs]
 
       minifier = Minifier(js, js_engine)
-      asm_shell_pre, asm_shell_post = minifier.minify_shell(asm_shell, 'compress' in passes).split('EMSCRIPTEN_FUNCS();');
+      asm_shell_pre, asm_shell_post = minifier.minify_shell(asm_shell, 'compress' in passes, debug).split('EMSCRIPTEN_FUNCS();');
       asm_shell_post = asm_shell_post.replace('});', '})');
       pre += asm_shell_pre + '\n' + start_funcs_marker
       post = end_funcs_marker + asm_shell_post + post
@@ -247,7 +251,9 @@ EMSCRIPTEN_FUNCS();
 
   if len(filenames) > 0:
     # XXX Use '--nocrankshaft' to disable crankshaft to work around v8 bug 1895, needed for older v8/node (node 0.6.8+ should be ok)
-    commands = map(lambda filename: js_engine + [JS_OPTIMIZER, filename, 'noPrintMetadata'] + passes, filenames)
+    commands = map(lambda filename: js_engine +
+        [JS_OPTIMIZER, filename, 'noPrintMetadata'] +
+        (['--debug'] if debug else []) + passes, filenames)
     #print [' '.join(command) for command in commands]
 
     cores = min(cores, filenames)
@@ -315,6 +321,6 @@ EMSCRIPTEN_FUNCS();
 
   return filename
 
-def run(filename, passes, js_engine, jcache):
-  return temp_files.run_and_clean(lambda: run_on_js(filename, passes, js_engine, jcache))
+def run(filename, passes, js_engine, jcache, debug=False):
+  return temp_files.run_and_clean(lambda: run_on_js(filename, passes, js_engine, jcache, debug))