Avoid install launcher scripts for foreign platform

i.e. don't install .bat files unless we are running on windows.

See #25953 (comment)

Author: sbc100

test/test_other.py

@@ -15088,7 +15088,7 @@ def test_parsetools_make_removed_fs_assert(self):
   @requires_git_checkout
   def test_install(self):
     self.run_process([PYTHON, path_from_root('tools/install.py'), 'newdir'], env=shared.env_with_node_in_path())
-    self.assertExists('newdir/emcc')
+    self.assertExists(utils.bat_suffix('newdir/emcc'))
     # Some files, such as as maintenance tools should not be part of the
     # install.
     self.assertNotExists('newdir/tools/maint/')

tools/install.py

@@ -17,6 +17,8 @@
 import subprocess
 import sys
 
+WINDOWS = sys.platform.startswith('win')
+
 EXCLUDES = [os.path.normpath(x) for x in '''
 test/third_party
 tools/maint
@@ -25,12 +27,22 @@
 node_modules
 Makefile
 .git
+.circleci
+.github
+.mypy_cache
+.ruff_cache
 cache
 cache.lock
 out
 bootstrap.py
 '''.split()]
 
+LAUNCHER_BAT_SCRIPTS = '''
+emcc.bat
+em++.bat
+bootstrap.bat
+'''.split()
+
 EXCLUDE_PATTERNS = '''
 *.pyc
 .*
@@ -50,6 +62,15 @@ def add_revision_file(target):
 def copy_emscripten(target):
   script_dir = os.path.dirname(os.path.abspath(__file__))
   emscripten_root = os.path.dirname(script_dir)
+
+  excludes = EXCLUDES
+  # We have a few launcher scripts that are checked into git still.
+  # Exclude the ones not designed for the current platforms.
+  if WINDOWS:
+    excludes += [os.path.splitext(l)[0] for l in LAUNCHER_BAT_SCRIPTS]
+  else:
+    excludes += LAUNCHER_BAT_SCRIPTS
+
   os.chdir(emscripten_root)
   for root, dirs, files in os.walk('.'):
     # Handle the case where the target directory is underneath emscripten_root
@@ -78,7 +99,7 @@ def copy_emscripten(target):
         logger.debug('skipping file: ' + os.path.join(root, f))
         continue
       full = os.path.normpath(os.path.join(root, f))
-      if full in EXCLUDES:
+      if full in excludes:
         logger.debug('skipping file: ' + os.path.join(root, f))
         continue
       logger.debug('installing file: ' + os.path.join(root, f))