[PATCH 1 of 7] pycompat: move rapply() from util

[Yuya Nishihara]

# HG changeset patch
# User Yuya Nishihara <yuya at tcha.org>
# Date 1528618049 -32400
#      Sun Jun 10 17:07:29 2018 +0900
# Node ID b67512d491f655c9602004420f8a5922341ba5cc
# Parent  600d8d9b8551088ee78e8005646d2dedd7a8d0c2
pycompat: move rapply() from util

I want to use rapply() in utils.* modules, but that would introduce a
reference cycle util -> utils.* -> util. Moving rapply() to pycompat
should be okay since it mostly serves as a compatibility helper.

diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -1680,7 +1680,7 @@ def showmarker(fm, marker, index=None):
     fm.write('date', '(%s) ', fm.formatdate(marker.date()))
     meta = marker.metadata().copy()
     meta.pop('date', None)
-    smeta = util.rapply(pycompat.maybebytestr, meta)
+    smeta = pycompat.rapply(pycompat.maybebytestr, meta)
     fm.write('metadata', '{%s}', fm.formatdict(smeta, fmt='%r: %r', sep=', '))
     fm.plain('\n')
 
diff --git a/mercurial/pycompat.py b/mercurial/pycompat.py
--- a/mercurial/pycompat.py
+++ b/mercurial/pycompat.py
@@ -47,6 +47,39 @@ else:
 def identity(a):
     return a
 
+def _rapply(f, xs):
+    if xs is None:
+        # assume None means non-value of optional data
+        return xs
+    if isinstance(xs, (list, set, tuple)):
+        return type(xs)(_rapply(f, x) for x in xs)
+    if isinstance(xs, dict):
+        return type(xs)((_rapply(f, k), _rapply(f, v)) for k, v in xs.items())
+    return f(xs)
+
+def rapply(f, xs):
+    """Apply function recursively to every item preserving the data structure
+
+    >>> def f(x):
+    ...     return 'f(%s)' % x
+    >>> rapply(f, None) is None
+    True
+    >>> rapply(f, 'a')
+    'f(a)'
+    >>> rapply(f, {'a'}) == {'f(a)'}
+    True
+    >>> rapply(f, ['a', 'b', None, {'c': 'd'}, []])
+    ['f(a)', 'f(b)', None, {'f(c)': 'f(d)'}, []]
+
+    >>> xs = [object()]
+    >>> rapply(identity, xs) is xs
+    True
+    """
+    if f is identity:
+        # fast path mainly for py2
+        return xs
+    return _rapply(f, xs)
+
 if ispy3:
     import builtins
     import functools
diff --git a/mercurial/revset.py b/mercurial/revset.py
--- a/mercurial/revset.py
+++ b/mercurial/revset.py
@@ -111,7 +111,7 @@ def _getrevsource(repo, r):
     return None
 
 def _sortedb(xs):
-    return sorted(util.rapply(pycompat.maybebytestr, xs))
+    return sorted(pycompat.rapply(pycompat.maybebytestr, xs))
 
 # operator methods
 
diff --git a/mercurial/scmutil.py b/mercurial/scmutil.py
--- a/mercurial/scmutil.py
+++ b/mercurial/scmutil.py
@@ -865,7 +865,7 @@ def cleanupnodes(repo, replacements, ope
                 continue
             from . import bookmarks # avoid import cycle
             repo.ui.debug('moving bookmarks %r from %s to %s\n' %
-                          (util.rapply(pycompat.maybebytestr, oldbmarks),
+                          (pycompat.rapply(pycompat.maybebytestr, oldbmarks),
                            hex(oldnode), hex(newnode)))
             # Delete divergent bookmarks being parents of related newnodes
             deleterevs = repo.revs('parents(roots(%ln & (::%n))) - parents(%n)',
diff --git a/mercurial/smartset.py b/mercurial/smartset.py
--- a/mercurial/smartset.py
+++ b/mercurial/smartset.py
@@ -29,7 +29,7 @@ def _formatsetrepr(r):
     if r is None:
         return ''
     elif isinstance(r, tuple):
-        return r[0] % util.rapply(pycompat.maybebytestr, r[1:])
+        return r[0] % pycompat.rapply(pycompat.maybebytestr, r[1:])
     elif isinstance(r, bytes):
         return r
     elif callable(r):
diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -156,10 +156,10 @@ b"""# example system-wide hg config (see
 }
 
 def _maybestrurl(maybebytes):
-    return util.rapply(pycompat.strurl, maybebytes)
+    return pycompat.rapply(pycompat.strurl, maybebytes)
 
 def _maybebytesurl(maybestr):
-    return util.rapply(pycompat.bytesurl, maybestr)
+    return pycompat.rapply(pycompat.bytesurl, maybestr)
 
 class httppasswordmgrdbproxy(object):
     """Delays loading urllib2 until it's needed."""
diff --git a/mercurial/util.py b/mercurial/util.py
--- a/mercurial/util.py
+++ b/mercurial/util.py
@@ -131,39 +131,6 @@ except AttributeError:
 
 _notset = object()
 
-def _rapply(f, xs):
-    if xs is None:
-        # assume None means non-value of optional data
-        return xs
-    if isinstance(xs, (list, set, tuple)):
-        return type(xs)(_rapply(f, x) for x in xs)
-    if isinstance(xs, dict):
-        return type(xs)((_rapply(f, k), _rapply(f, v)) for k, v in xs.items())
-    return f(xs)
-
-def rapply(f, xs):
-    """Apply function recursively to every item preserving the data structure
-
-    >>> def f(x):
-    ...     return 'f(%s)' % x
-    >>> rapply(f, None) is None
-    True
-    >>> rapply(f, 'a')
-    'f(a)'
-    >>> rapply(f, {'a'}) == {'f(a)'}
-    True
-    >>> rapply(f, ['a', 'b', None, {'c': 'd'}, []])
-    ['f(a)', 'f(b)', None, {'f(c)': 'f(d)'}, []]
-
-    >>> xs = [object()]
-    >>> rapply(pycompat.identity, xs) is xs
-    True
-    """
-    if f is pycompat.identity:
-        # fast path mainly for py2
-        return xs
-    return _rapply(f, xs)
-
 def bitsfrom(container):
     bits = 0
     for bit in container: