phases: read pending data when appropriate

If we are called by a hook and pending data exists, read those.

mercurial/phases.py

@@ -100,6 +100,7 b' Note: old client behave as a publishing '
 
 """
 
+import os
 import errno
 from node import nullid, nullrev, bin, hex, short
 from i18n import _
@@ -124,7 +125,15 b' def _readroots(repo, phasedefaults=None)'
     dirty = False
     roots = [set() for i in allphases]
     try:
-        f = repo.sopener('phaseroots')
+        f = None
+        if 'HG_PENDING' in os.environ:
+            try:
+                f = repo.svfs('phaseroots.pending')
+            except IOError, inst:
+                if inst.errno != errno.ENOENT:
+                    raise
+        if f is None:
+            f = repo.sopener('phaseroots')
         try:
             for line in f:
                 phase, nh = line.split()

tests/test-bundle2-exchange.t

@@ -61,7 +61,7 b' clone --pull'
   adding file changes
   added 2 changesets with 2 changes to 2 files
   1 new obsolescence markers
-  pre-close-tip:9520eea781bc public 
+  pre-close-tip:9520eea781bc draft 
   postclose-tip:9520eea781bc draft 
   b2x-transactionclose hook: HG_NEW_OBSMARKERS=1 HG_NODE=cd010b8cd998f3981a5a8115f94f8da4ab506089 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
   changegroup hook: HG_NODE=cd010b8cd998f3981a5a8115f94f8da4ab506089 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
@@ -86,7 +86,7 b' pull'
   adding file changes
   added 1 changesets with 1 changes to 1 files (+1 heads)
   1 new obsolescence markers
-  pre-close-tip:24b6387c8c8c public 
+  pre-close-tip:24b6387c8c8c draft 
   postclose-tip:24b6387c8c8c draft 
   b2x-transactionclose hook: HG_NEW_OBSMARKERS=1 HG_NODE=24b6387c8c8cae37178880f3fa95ded3cb1cf785 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
   changegroup hook: HG_NODE=24b6387c8c8cae37178880f3fa95ded3cb1cf785 HG_SOURCE=pull HG_URL=file:$TESTTMP/main
@@ -166,7 +166,7 b' push'
   $ hg -R main push other --rev eea13746799a --bookmark book_eea1
   pushing to other
   searching for changes
-  pre-close-tip:eea13746799a draft book_eea1
+  pre-close-tip:eea13746799a public book_eea1
   postclose-tip:eea13746799a public book_eea1
   b2x-transactionclose hook: HG_BOOKMARK_MOVED=1 HG_BUNDLE2-EXP=1 HG_NEW_OBSMARKERS=1 HG_NODE=eea13746799a9e0bfd88f29d3c2e9dc9389f524f HG_PHASES_MOVED=1 HG_SOURCE=push HG_URL=push
   changegroup hook: HG_BUNDLE2-EXP=1 HG_NODE=eea13746799a9e0bfd88f29d3c2e9dc9389f524f HG_SOURCE=push HG_URL=push
@@ -201,7 +201,7 b' pull over ssh'
   added 1 changesets with 1 changes to 1 files (+1 heads)
   1 new obsolescence markers
   updating bookmark book_02de
-  pre-close-tip:02de42196ebe public book_02de
+  pre-close-tip:02de42196ebe draft book_02de
   postclose-tip:02de42196ebe draft book_02de
   b2x-transactionclose hook: HG_BOOKMARK_MOVED=1 HG_NEW_OBSMARKERS=1 HG_NODE=02de42196ebee42ef284b6780a87cdc96e8eaab6 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=ssh://user@dummy/main
   changegroup hook: HG_NODE=02de42196ebee42ef284b6780a87cdc96e8eaab6 HG_SOURCE=pull HG_URL=ssh://user@dummy/main
@@ -226,7 +226,7 b' pull over http'
   added 1 changesets with 1 changes to 1 files (+1 heads)
   1 new obsolescence markers
   updating bookmark book_42cc
-  pre-close-tip:42ccdea3bb16 public book_42cc
+  pre-close-tip:42ccdea3bb16 draft book_42cc
   postclose-tip:42ccdea3bb16 draft book_42cc
   b2x-transactionclose hook: HG_BOOKMARK_MOVED=1 HG_NEW_OBSMARKERS=1 HG_NODE=42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 HG_PHASES_MOVED=1 HG_SOURCE=pull HG_URL=http://localhost:$HGPORT/
   changegroup hook: HG_NODE=42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 HG_SOURCE=pull HG_URL=http://localhost:$HGPORT/