index: add a `has_node` method (API)

index: add a `has_node` method (API)

The new `index.has_node(node)` is to be preferred over:

    `node in index.nodemap`.

This get us closer to be able to remove the `nodemap` attribute of the index.

Differential Revision: https://phab.mercurial-scm.org/D7322

--- a/mercurial/cext/parsers.c	Sat Nov 09 05:54:22 2019 +0100
+++ b/mercurial/cext/parsers.c	Sun Nov 03 00:01:09 2019 +0100
@@ -667,7 +667,7 @@
 void manifest_module_init(PyObject *mod);
 void revlog_module_init(PyObject *mod);
 
-static const int version = 13;
+static const int version = 14;
 
 static void module_init(PyObject *mod)
 {

--- a/mercurial/cext/revlog.c	Sat Nov 09 05:54:22 2019 +0100
+++ b/mercurial/cext/revlog.c	Sun Nov 03 00:01:09 2019 +0100
@@ -2065,6 +2065,14 @@
 	}
 }
 
+static PyObject *index_m_has_node(indexObject *self, PyObject *args)
+{
+	int ret = index_contains(self, args);
+	if (ret < 0)
+		return NULL;
+	return PyBool_FromLong((long)ret);
+}
+
 typedef uint64_t bitmask;
 
 /*
@@ -2723,6 +2731,8 @@
     {"clearcaches", (PyCFunction)index_clearcaches, METH_NOARGS,
      "clear the index caches"},
     {"get", (PyCFunction)index_m_get, METH_VARARGS, "get an index entry"},
+    {"has_node", (PyCFunction)index_m_has_node, METH_O,
+     "return True if the node exist in the index"},
     {"computephasesmapsets", (PyCFunction)compute_phases_map_sets, METH_VARARGS,
      "compute phases"},
     {"reachableroots2", (PyCFunction)reachableroots2, METH_VARARGS,

--- a/mercurial/policy.py	Sat Nov 09 05:54:22 2019 +0100
+++ b/mercurial/policy.py	Sun Nov 03 00:01:09 2019 +0100
@@ -80,7 +80,7 @@
     ('cext', 'bdiff'): 3,
     ('cext', 'mpatch'): 1,
     ('cext', 'osutil'): 4,
-    ('cext', 'parsers'): 13,
+    ('cext', 'parsers'): 14,
 }
 
 # map import request to other package or module

--- a/mercurial/pure/parsers.py	Sat Nov 09 05:54:22 2019 +0100
+++ b/mercurial/pure/parsers.py	Sun Nov 03 00:01:09 2019 +0100
@@ -55,6 +55,10 @@
             nodemap[n] = r
         return nodemap
 
+    def has_node(self, node):
+        """return True if the node exist in the index"""
+        return node in self.nodemap
+
     def _stripnodes(self, start):
         if 'nodemap' in vars(self):
             for r in range(start, len(self)):

--- a/mercurial/revlog.py	Sat Nov 09 05:54:22 2019 +0100
+++ b/mercurial/revlog.py	Sun Nov 03 00:01:09 2019 +0100
@@ -213,6 +213,10 @@
             nodemap[n] = r
         return nodemap
 
+    def has_node(self, node):
+        """return True if the node exist in the index"""
+        return node in self.nodemap
+
     def append(self, tup):
         self.nodemap[tup[7]] = len(self)
         super(revlogoldindex, self).append(tup)