Use the current working directory of the foreground process for the *_with_cwd actions that open a new window with the current working directory.

kitty/child.py

@@ -205,6 +205,10 @@ class Child:
                     ans['cmdline'] = cmdline_of_process(pid)
                 except Exception:
                     pass
+                try:
+                    ans['cwd'] = cwd_of_process(pid) or None
+                except Exception:
+                    pass
                 return ans
 
             return list(map(process_desc, foreground_processes))
@@ -231,3 +235,21 @@ class Child:
             return cwd_of_process(self.pid)
         except Exception:
             pass
+
+    @property
+    def pid_for_cwd(self):
+        try:
+            pgrp = os.tcgetpgrp(self.child_fd)
+            foreground_processes = processes_in_group(pgrp) if pgrp >= 0 else []
+            if len(foreground_processes) == 1:
+                return foreground_processes[0]
+        except Exception:
+            pass
+        return self.pid
+
+    @property
+    def foreground_cwd(self):
+        try:
+            return cwd_of_process(self.pid_for_cwd) or None
+        except Exception:
+            pass