add tools to split and merge asm modules from the surrounding code

1 files changed, 26 insertions, 0 deletions

diff --git a/tools/merge_asm.py b/tools/merge_asm.py
new file mode 100755
index 00000000..fe143a89
--- /dev/null
+++ b/tools/merge_asm.py
@@ -0,0 +1,26 @@
+#!/usr/bin/env python2
+
+'''
+Splits a compiler outputted program into the asm module and the surrounding shell. This
+can be useful if you want to process the shell in some manner (e.g. minifiy it) in ways
+that would be harmful to asm.js code.
+'''
+
+import sys
+import shared
+
+try:
+  me, in_shell, in_asm, outfile = sys.argv[:4]
+except:
+  print >> sys.stderr, 'usage: emlink.py [input file] [shell output file] [asm output file]'
+  sys.exit(1)
+
+print 'Shell input:', in_shell
+print 'Asm input:', in_asm
+print 'Input file:', outfile
+
+shared.try_delete(outfile)
+
+pre, post = open(in_shell).read().split('// ASM_CODE\n')
+open(outfile, 'w').write(pre + '\n' + open(in_asm).read() + '\n' + post)
+