merge: don't report progress for dr/rd actions

It is easier to reason about certain algorithms in terms of a
file->action mapping than the current action->list-of-files. Bid merge
is already written this way (but with a list of actions per file), and
largefiles' overridecalculateupdates() will also benefit. However,
that requires us to have at most one action per file. That requirement
is currently violated by 'dr' (divergent rename) and 'rd' (rename and
delete) actions, which can exist for the same file as some other
action.

These actions are only used for displaying warnings to the user; they
don't change anything in the working copy or the dirstate. In this
way, they are similar to the 'k' (keep) action. However, they are even
less action-like than 'k' is: 'k' at least describes what to do with
the file ("do nothing"), while 'dr' and 'rd' or only annotations for
files for which there may exist other, "real" actions.

As a first step towards separating these acitons out, stop including
them in the progress output, just like we already exclude the 'k'
action.

mercurial/merge.py

@@ -742,7 +742,8 b' def applyupdates(repo, actions, wctx, mc'
             audit(f)
             util.unlinkpath(repo.wjoin(f))
 
-    numupdates = sum(len(l) for m, l in actions.items() if m != 'k')
+    numupdates = sum(len(l) for m, l in actions.items()
+                     if m not in ('k', 'dr', 'rd'))
 
     if [a for a in actions['r'] if a[0] == '.hgsubstate']:
         subrepo.submerge(repo, wctx, mctx, wctx, overwrite)
@@ -825,9 +826,6 b' def applyupdates(repo, actions, wctx, mc'
 
     # divergent renames
     for f, args, msg in actions['dr']:
-        repo.ui.debug(" %s: %s -> dr\n" % (f, msg))
-        z += 1
-        progress(_updating, z, item=f, total=numupdates, unit=_files)
         fl, = args
         repo.ui.warn(_("note: possible conflict - %s was renamed "
                        "multiple times to:\n") % f)
@@ -836,9 +834,6 b' def applyupdates(repo, actions, wctx, mc'
 
     # rename and delete
     for f, args, msg in actions['rd']:
-        repo.ui.debug(" %s: %s -> rd\n" % (f, msg))
-        z += 1
-        progress(_updating, z, item=f, total=numupdates, unit=_files)
         fl, = args
         repo.ui.warn(_("note: possible conflict - %s was deleted "
                        "and renamed to:\n") % f)

tests/test-rename-merge1.t

@@ -40,15 +40,13 b''
   removing a
    b2: remote created -> g
   getting b2
-  updating: b2 1/3 files (33.33%)
+  updating: b2 1/2 files (50.00%)
    b: remote moved from a -> m
-  updating: b 2/3 files (66.67%)
+  updating: b 2/2 files (100.00%)
   picked tool 'internal:merge' for b (binary False symlink False)
   merging a and b to b
   my b@044f8520aeeb+ other b@85c198ef2f6c ancestor a@af1939970a1c
    premerge successful
-   a2: divergent renames -> dr
-  updating: a2 3/3 files (100.00%)
   note: possible conflict - a2 was renamed multiple times to:
    c2
    b2
@@ -183,9 +181,7 b' Check for issue3074'
    ancestor: 19d7f95df299, local: 0084274f6b67+, remote: 5d32493049f0
    newfile: remote created -> g
   getting newfile
-  updating: newfile 1/2 files (50.00%)
-   file: rename and delete -> rd
-  updating: file 2/2 files (100.00%)
+  updating: newfile 1/1 files (100.00%)
   note: possible conflict - file was deleted and renamed to:
    newfile
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved

tests/test-rename-merge2.t

@@ -382,14 +382,12 b' m "um a c" "um x c" " " "10 do merg'
    preserving rev for resolve of rev
    c: remote created -> g
   getting c
-  updating: c 1/3 files (33.33%)
+  updating: c 1/2 files (50.00%)
    rev: versions differ -> m
-  updating: rev 2/3 files (66.67%)
+  updating: rev 2/2 files (100.00%)
   picked tool 'python ../merge' for rev (binary False symlink False)
   merging rev
   my rev@02963e448370+ other rev@fe905ef2c33e ancestor rev@924404dff337
-   a: divergent renames -> dr
-  updating: a 3/3 files (100.00%)
   note: possible conflict - a was renamed multiple times to:
    b
    c