Merge remote-tracking branch 'remotes/qmp-unstable/queue/qmp' into staging

* remotes/qmp-unstable/queue/qmp:
  qapi: skip redundant includes
  monitor: Add netdev_del id argument completion.
  monitor: Add netdev_add type argument completion.
  monitor: Add set_link arguments completion.
  monitor: Add chardev-add backend argument completion.
  monitor: Add chardev-remove command completion.
  monitor: Convert sendkey to use command_completion.
  qapi: Show qapi-commands.py invocation in qapi-code-gen.txt
  qapi: Replace uncommon use of the error API by the common one
  tests: Don't call visit_end_struct() after visit_start_struct() fails
  hw: Don't call visit_end_struct() after visit_start_struct() fails
  hmp: Call visit_end_struct() after visit_start_struct() succeeds
  qapi: Un-inline visit of implicit struct
  qapi-visit.py: Clean up a sloppy use of field prefix
  qapi: Clean up shadowing of parameters and locals in inner scopes
  qapi-visit.py: Clean up confusing push_indent() / pop_indent() use
  qapi: Replace start_optional()/end_optional() by optional()
  qapi: Remove unused Visitor callbacks start_handle(), end_handle()
  qapi: Normalize marshalling's visitor initialization and cleanup
  qapi: Update qapi-code-gen.txt example to match current code

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 11 insertions, 3 deletions

diff --git a/scripts/qapi.py b/scripts/qapi.py
index ec806aabeb..0265b404dd 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -73,13 +73,18 @@ class QAPIExprError(Exception):
 
 class QAPISchema:
 
-    def __init__(self, fp, input_relname=None, include_hist=[], parent_info=None):
+    def __init__(self, fp, input_relname=None, include_hist=[],
+                 previously_included=[], parent_info=None):
+        """ include_hist is a stack used to detect inclusion cycles
+            previously_included is a global state used to avoid multiple
+                                inclusions of the same file"""
         input_fname = os.path.abspath(fp.name)
         if input_relname is None:
             input_relname = fp.name
         self.input_dir = os.path.dirname(input_fname)
         self.input_file = input_relname
         self.include_hist = include_hist + [(input_relname, input_fname)]
+        previously_included.append(input_fname)
         self.parent_info = parent_info
         self.src = fp.read()
         if self.src == '' or self.src[-1] != '\n':
@@ -106,13 +111,16 @@ class QAPISchema:
                        for elem in self.include_hist):
                     raise QAPIExprError(expr_info, "Inclusion loop for %s"
                                         % include)
+                # skip multiple include of the same file
+                if include_path in previously_included:
+                    continue
                 try:
                     fobj = open(include_path, 'r')
                 except IOError as e:
                     raise QAPIExprError(expr_info,
                                         '%s: %s' % (e.strerror, include))
-                exprs_include = QAPISchema(fobj, include,
-                                           self.include_hist, expr_info)
+                exprs_include = QAPISchema(fobj, include, self.include_hist,
+                                           previously_included, expr_info)
                 self.exprs.extend(exprs_include.exprs)
             else:
                 expr_elem = {'expr': expr,