bundle: make bundles more portable (isue3441) stable

bundle: make bundles more portable (isue3441)

This is achieved by acting as if the user had given -r<rev> for each head rev
of outgoing changesets on the command line, as well as appropriate
--base <rev>.

The discovery information is computed as normal, and then adjusted as above.

--- a/mercurial/commands.py	Mon May 14 19:25:13 2012 -0400
+++ b/mercurial/commands.py	Sat May 12 19:38:20 2012 +0200
@@ -1011,7 +1011,8 @@
         heads = revs and map(repo.lookup, revs) or revs
         outgoing = discovery.findcommonoutgoing(repo, other,
                                                 onlyheads=heads,
-                                                force=opts.get('force'))
+                                                force=opts.get('force'),
+                                                portable=True)
         cg = repo.getlocalbundle('bundle', outgoing)
     if not cg:
         scmutil.nochangesfound(ui, outgoing and outgoing.excluded)

--- a/mercurial/discovery.py	Mon May 14 19:25:13 2012 -0400
+++ b/mercurial/discovery.py	Sat May 12 19:38:20 2012 +0200
@@ -86,7 +86,8 @@
             self._computecommonmissing()
         return self._missing
 
-def findcommonoutgoing(repo, other, onlyheads=None, force=False, commoninc=None):
+def findcommonoutgoing(repo, other, onlyheads=None, force=False, commoninc=None,
+                       portable=False):
     '''Return an outgoing instance to identify the nodes present in repo but
     not in other.
 
@@ -95,7 +96,10 @@
     onlyheads is faster than letting them be recomputed here.
 
     If commoninc is given, it must the the result of a prior call to
-    findcommonincoming(repo, other, force) to avoid recomputing it here.'''
+    findcommonincoming(repo, other, force) to avoid recomputing it here.
+
+    If portable is given, compute more conservative common and missingheads,
+    to make bundles created from the instance more portable.'''
     # declare an empty outgoing object to be filled later
     og = outgoing(repo.changelog, None, None)
 
@@ -129,6 +133,17 @@
             missingheads = onlyheads
         og.missingheads = missingheads
 
+    if portable:
+        # recompute common and missingheads as if -r<rev> had been given for
+        # each head of missing, and --base <rev> for each head of the proper
+        # ancestors of missing
+        og._computecommonmissing()
+        cl = repo.changelog
+        missingrevs = set(cl.rev(n) for n in og._missing)
+        og._common = set(cl.ancestors(*missingrevs)) - missingrevs
+        commonheads = set(og.commonheads)
+        og.missingheads = [h for h in og.missingheads if h not in commonheads]
+
     return og
 
 def checkheads(repo, remote, outgoing, remoteheads, newbranch=False, inc=False):

--- a/tests/test-bundle.t	Mon May 14 19:25:13 2012 -0400
+++ b/tests/test-bundle.t	Sat May 12 19:38:20 2012 +0200
@@ -539,32 +539,36 @@
   $ hg init branchy
   $ cd branchy
   $ echo a >a
+  $ echo x >x
   $ hg ci -Ama
   adding a
+  adding x
+  $ echo c >c
+  $ echo xx >x
+  $ hg ci -Amc
+  adding c
+  $ echo c1 >c1
+  $ hg ci -Amc1
+  adding c1
+  $ hg up 0
+  1 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ echo b >b
   $ hg ci -Amb
   adding b
+  created new head
   $ echo b1 >b1
+  $ echo xx >x
   $ hg ci -Amb1
   adding b1
-  $ hg up 0
-  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
-  $ echo c >c
-  $ hg ci -Amc
-  adding c
-  created new head
-  $ echo c1 >c1
-  $ hg ci -Amc1
-  adding c1
-  $ hg clone -q .#tip part
+  $ hg clone -q -r2 . part
 
 == bundling via incoming
 
   $ hg in -R part --bundle incoming.hg --template "{node}\n" .
   comparing with .
   searching for changes
-  d2ae7f538514cd87c17547b0de4cea71fe1af9fb
-  5ece8e77363e2b5269e27c66828b72da29e4341a
+  1a38c1b849e8b70c756d2d80b0b9a3ac0b7ea11a
+  057f4db07f61970e1c11e83be79e9d08adc4dc31
 
 == bundling
 
@@ -574,12 +578,23 @@
   all remote heads known locally
   2 changesets found
   list of changesets:
-  d2ae7f538514cd87c17547b0de4cea71fe1af9fb
-  5ece8e77363e2b5269e27c66828b72da29e4341a
+  1a38c1b849e8b70c756d2d80b0b9a3ac0b7ea11a
+  057f4db07f61970e1c11e83be79e9d08adc4dc31
   bundling: 1/2 changesets (50.00%)
   bundling: 2/2 changesets (100.00%)
   bundling: 1/2 manifests (50.00%)
   bundling: 2/2 manifests (100.00%)
-  bundling: b 1/2 files (50.00%)
-  bundling: b1 2/2 files (100.00%)
+  bundling: b 1/3 files (33.33%)
+  bundling: b1 2/3 files (66.67%)
+  bundling: x 3/3 files (100.00%)
+
+== Test for issue3441
 
+  $ hg clone -q -r0 . part2
+  $ hg -q -R part2 pull bundle.hg
+  $ hg -R part2 verify
+  checking changesets
+  checking manifests
+  crosschecking files in changesets and manifests
+  checking files
+  4 files, 3 changesets, 5 total revisions

--- a/tests/test-check-code-hg.t	Mon May 14 19:25:13 2012 -0400
+++ b/tests/test-check-code-hg.t	Sat May 12 19:38:20 2012 +0200
@@ -420,9 +420,6 @@
   mercurial/discovery.py:0:
    >     If onlyheads is given, only nodes ancestral to nodes in onlyheads (inclusive)
    warning: line over 80 characters
-  mercurial/discovery.py:0:
-   > def findcommonoutgoing(repo, other, onlyheads=None, force=False, commoninc=None):
-   warning: line over 80 characters
   mercurial/dispatch.py:0:
    >                                                 " (.hg not found)") % os.getcwd())
    warning: line over 80 characters