add gdb commands: koch, nim, nimble (#10741)

* add gdb commands: koch, nim, nimble
* make commands path independent

tools/nim-gdb.py

@@ -168,6 +168,60 @@ class DollarPrintCmd (gdb.Command):
 
 DollarPrintCmd()
 
+
+################################################################################
+#####  GDB Commands to invoke common nim tools.
+################################################################################
+
+
+import subprocess, os
+
+
+class KochCmd (gdb.Command):
+  """Command that invokes ``koch'', the build tool for the compiler."""
+
+  def __init__ (self):
+    super (KochCmd, self).__init__ ("koch",
+                                    gdb.COMMAND_USER, gdb.COMPLETE_FILENAME)
+    self.binary = os.path.join(
+      os.path.dirname(os.path.dirname(__file__)), "koch")
+
+  def invoke(self, argument, from_tty):
+    import os
+    subprocess.run([self.binary] + gdb.string_to_argv(argument))
+
+KochCmd()
+
+
+class NimCmd (gdb.Command):
+  """Command that invokes ``nim'', the nim compiler."""
+
+  def __init__ (self):
+    super (NimCmd, self).__init__ ("nim",
+                                   gdb.COMMAND_USER, gdb.COMPLETE_FILENAME)
+    self.binary = os.path.join(
+      os.path.dirname(os.path.dirname(__file__)), "bin/nim")
+
+  def invoke(self, argument, from_tty):
+    subprocess.run([self.binary] + gdb.string_to_argv(argument))
+
+NimCmd()
+
+
+class NimbleCmd (gdb.Command):
+  """Command that invokes ``nimble'', the nim package manager and build tool."""
+
+  def __init__ (self):
+    super (NimbleCmd, self).__init__ ("nimble",
+                                      gdb.COMMAND_USER, gdb.COMPLETE_FILENAME)
+    self.binary = os.path.join(
+      os.path.dirname(os.path.dirname(__file__)), "bin/nimble")
+
+  def invoke(self, argument, from_tty):
+    subprocess.run([self.binary] + gdb.string_to_argv(argument))
+
+NimbleCmd()
+
 ################################################################################
 #####  Value pretty printers
 ################################################################################