Add primer for rust debugging

usr-jp/local/etc/lldb_vscode_rustc_primer.py

@@ -0,0 +1,12 @@
+import subprocess
+import pathlib
+import lldb
+
+# determine the sysroot for the active rust interpreter
+rustlib_etc = pathlib.Path(subprocess.getoutput('rustc --print sysroot')) / 'lib' / 'rustlib' / 'etc'
+if not rustlib_etc.exists():
+    raise RuntimeError('Unable to determine rustc sysroot')
+
+# load lldb_lookup.py and execute lldb_commands with the correct path
+lldb.debugger.HandleCommand(f"""command script import "{rustlib_etc / 'lldb_lookup.py'}" """)
+lldb.debugger.HandleCommand(f"""command source -s 0 "{rustlib_etc / 'lldb_commands'}" """)