IPython/utils/_process_emscripten.py: New (#14316)

From
https://github.com/ipython/ipython/pull/14312#issuecomment-1917947192
@hoodmane

IPython/utils/_process_emscripten.py

@@ -0,0 +1,21 b''
+"""Emscripten-specific implementation of process utilities.
+
+This file is only meant to be imported by process.py, not by end-users.
+"""
+
+
+def system(cmd):
+    raise OSError("Not available")
+
+
+def getoutput(cmd):
+    raise OSError("Not available")
+
+
+def check_pid(cmd):
+    raise OSError("Not available")
+
+
+def arg_split(s, posix=False, strict=True):
+    """This one could be made to work but it's not clear if it would be useful..."""
+    raise OSError("Not available")

IPython/utils/process.py

@@ -15,6 +15,8 b" if sys.platform == 'win32':"
     from ._process_win32 import system, getoutput, arg_split, check_pid
 elif sys.platform == 'cli':
     from ._process_cli import system, getoutput, arg_split, check_pid
+elif sys.platform == "emscripten":
+    from ._process_emscripten import system, getoutput, arg_split, check_pid
 else:
     from ._process_posix import system, getoutput, arg_split, check_pid
 

setup.cfg

@@ -34,7 +34,7 b' install_requires ='
     exceptiongroup; python_version<'3.11'
     jedi>=0.16
     matplotlib-inline
-    pexpect>4.3; sys_platform != "win32"
+    pexpect>4.3; sys_platform != "win32" and sys_platform != "emscripten"
     prompt_toolkit>=3.0.41,<3.1.0
     pygments>=2.4.0
     stack_data