infinitepush: introduce server option to route every push to bundlestore

This patch introduces a new config option for server
`infinitepush.pushtobundlestore` which if sets to True, the server will route
each incoming push to the bundlestore and store all the parts i.e. changegroups,
phases, obsmarkers in the bundlestore and won't be applied to the revlog.

This config option does not need any client side wrapping and does not need any
custom bundle2 part or stream level parameter to decide where the push should
go.

This is very useful for Mozilla CI use case where they have a central server
that recieves pushes to trigger code-reviews, trigger a test run of CI, run
static analysis etc. The server using the new config option can stash standalone
bundles to the bundlestore and server can get access to individual revisions on
demand.

A new test file which has related tests are added for the config option.

Differential Revision: https://phab.mercurial-scm.org/D2958

tests/test-infinitepush-ci.t

@@ -0,0 +1,344 b''
+Testing the case when there is no infinitepush extension present on the client
+side and the server routes each push to bundlestore. This case is very much
+similar to CI use case.
+
+Setup
+-----
+
+  $ . "$TESTDIR/library-infinitepush.sh"
+  $ cat >> $HGRCPATH <<EOF
+  > [alias]
+  > glog = log -GT "{rev}:{node|short} {desc}\n{phase}"
+  > EOF
+  $ cp $HGRCPATH $TESTTMP/defaulthgrc
+  $ hg init repo
+  $ cd repo
+  $ setupserver
+  $ echo "pushtobundlestore = True" >> .hg/hgrc
+  $ echo "[extensions]" >> .hg/hgrc
+  $ echo "infinitepush=" >> .hg/hgrc
+  $ echo initialcommit > initialcommit
+  $ hg ci -Aqm "initialcommit"
+  $ hg phase --public .
+
+  $ cd ..
+  $ hg clone repo client -q
+  $ cd client
+
+Pushing a new commit from the client to the server
+-----------------------------------------------------
+
+  $ echo foobar > a
+  $ hg ci -Aqm "added a"
+  $ hg glog
+  @  1:6cb0989601f1 added a
+  |  draft
+  o  0:67145f466344 initialcommit
+     public
+
+  $ hg push
+  pushing to $TESTTMP/repo
+  searching for changes
+  storing changesets on the bundlestore
+  pushing 1 commit:
+      6cb0989601f1  added a
+
+  $ scratchnodes
+  6cb0989601f1fb5805238edfb16f3606713d9a0b a4c202c147a9c4bb91bbadb56321fc5f3950f7f2
+
+Understanding how data is stored on the bundlestore in server
+-------------------------------------------------------------
+
+There are two things, filebundlestore and index
+  $ ls ../repo/.hg/scratchbranches
+  filebundlestore
+  index
+
+filebundlestore stores the bundles
+  $ ls ../repo/.hg/scratchbranches/filebundlestore/a4/c2/
+  a4c202c147a9c4bb91bbadb56321fc5f3950f7f2
+
+index/nodemap stores a map of node id and file in which bundle is stored in filebundlestore
+  $ ls ../repo/.hg/scratchbranches/index/
+  nodemap
+  $ ls ../repo/.hg/scratchbranches/index/nodemap/
+  6cb0989601f1fb5805238edfb16f3606713d9a0b
+
+  $ cd ../repo
+
+Checking that the commit was not applied to revlog on the server
+------------------------------------------------------------------
+
+  $ hg glog
+  @  0:67145f466344 initialcommit
+     public
+
+Applying the changeset from the bundlestore
+--------------------------------------------
+
+  $ hg unbundle .hg/scratchbranches/filebundlestore/a4/c2/a4c202c147a9c4bb91bbadb56321fc5f3950f7f2
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 1 changes to 1 files
+  new changesets 6cb0989601f1
+  (run 'hg update' to get a working copy)
+
+  $ hg glog
+  o  1:6cb0989601f1 added a
+  |  public
+  @  0:67145f466344 initialcommit
+     public
+
+Pushing more changesets from the local repo
+--------------------------------------------
+
+  $ cd ../client
+  $ echo b > b
+  $ hg ci -Aqm "added b"
+  $ echo c > c
+  $ hg ci -Aqm "added c"
+  $ hg glog
+  @  3:bf8a6e3011b3 added c
+  |  draft
+  o  2:eaba929e866c added b
+  |  draft
+  o  1:6cb0989601f1 added a
+  |  public
+  o  0:67145f466344 initialcommit
+     public
+
+  $ hg push
+  pushing to $TESTTMP/repo
+  searching for changes
+  storing changesets on the bundlestore
+  pushing 2 commits:
+      eaba929e866c  added b
+      bf8a6e3011b3  added c
+
+Checking that changesets are not applied on the server
+------------------------------------------------------
+
+  $ hg glog -R ../repo
+  o  1:6cb0989601f1 added a
+  |  public
+  @  0:67145f466344 initialcommit
+     public
+
+Both of the new changesets are stored in a single bundle-file
+  $ scratchnodes
+  6cb0989601f1fb5805238edfb16f3606713d9a0b a4c202c147a9c4bb91bbadb56321fc5f3950f7f2
+  bf8a6e3011b345146bbbedbcb1ebd4837571492a ee41a41cefb7817cbfb235b4f6e9f27dbad6ca1f
+  eaba929e866c59bc9a6aada5a9dd2f6990db83c0 ee41a41cefb7817cbfb235b4f6e9f27dbad6ca1f
+
+Pushing more changesets to the server
+-------------------------------------
+
+  $ echo d > d
+  $ hg ci -Aqm "added d"
+  $ echo e > e
+  $ hg ci -Aqm "added e"
+
+XXX: we should have pushed only the parts which are not in bundlestore
+  $ hg push
+  pushing to $TESTTMP/repo
+  searching for changes
+  storing changesets on the bundlestore
+  pushing 4 commits:
+      eaba929e866c  added b
+      bf8a6e3011b3  added c
+      1bb96358eda2  added d
+      b4e4bce66051  added e
+
+Sneak peek into the bundlestore at the server
+  $ scratchnodes
+  1bb96358eda285b536c6d1c66846a7cdb2336cea 57e00c0d4f26e2a2a72b751b63d9abc4f3eb28e7
+  6cb0989601f1fb5805238edfb16f3606713d9a0b a4c202c147a9c4bb91bbadb56321fc5f3950f7f2
+  b4e4bce660512ad3e71189e14588a70ac8e31fef 57e00c0d4f26e2a2a72b751b63d9abc4f3eb28e7
+  bf8a6e3011b345146bbbedbcb1ebd4837571492a 57e00c0d4f26e2a2a72b751b63d9abc4f3eb28e7
+  eaba929e866c59bc9a6aada5a9dd2f6990db83c0 57e00c0d4f26e2a2a72b751b63d9abc4f3eb28e7
+
+Checking if `hg pull` pulls something or `hg incoming` shows something
+-----------------------------------------------------------------------
+
+  $ hg incoming
+  comparing with $TESTTMP/repo
+  searching for changes
+  no changes found
+  [1]
+
+  $ hg pull
+  pulling from $TESTTMP/repo
+  searching for changes
+  no changes found
+
+Checking storage of phase information with the bundle on bundlestore
+---------------------------------------------------------------------
+
+creating a draft commit
+  $ cat >> $HGRCPATH <<EOF
+  > [phases]
+  > publish = False
+  > EOF
+  $ echo f > f
+  $ hg ci -Aqm "added f"
+  $ hg glog -r '.^::'
+  @  6:9b42578d4447 added f
+  |  draft
+  o  5:b4e4bce66051 added e
+  |  public
+  ~
+
+  $ hg push
+  pushing to $TESTTMP/repo
+  searching for changes
+  storing changesets on the bundlestore
+  pushing 5 commits:
+      eaba929e866c  added b
+      bf8a6e3011b3  added c
+      1bb96358eda2  added d
+      b4e4bce66051  added e
+      9b42578d4447  added f
+
+XXX: the phase of 9b42578d4447 should not be changed here
+  $ hg glog -r .
+  @  6:9b42578d4447 added f
+  |  public
+  ~
+
+applying the bundle on the server to check preservation of phase-information
+
+  $ cd ../repo
+  $ scratchnodes
+  1bb96358eda285b536c6d1c66846a7cdb2336cea 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  6cb0989601f1fb5805238edfb16f3606713d9a0b a4c202c147a9c4bb91bbadb56321fc5f3950f7f2
+  9b42578d44473575994109161430d65dd147d16d 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  b4e4bce660512ad3e71189e14588a70ac8e31fef 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  bf8a6e3011b345146bbbedbcb1ebd4837571492a 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  eaba929e866c59bc9a6aada5a9dd2f6990db83c0 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+
+  $ hg unbundle .hg/scratchbranches/filebundlestore/0a/6e/0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  adding changesets
+  adding manifests
+  adding file changes
+  added 5 changesets with 5 changes to 5 files
+  new changesets eaba929e866c:9b42578d4447
+  (run 'hg update' to get a working copy)
+
+  $ hg glog
+  o  6:9b42578d4447 added f
+  |  draft
+  o  5:b4e4bce66051 added e
+  |  public
+  o  4:1bb96358eda2 added d
+  |  public
+  o  3:bf8a6e3011b3 added c
+  |  public
+  o  2:eaba929e866c added b
+  |  public
+  o  1:6cb0989601f1 added a
+  |  public
+  @  0:67145f466344 initialcommit
+     public
+
+Checking storage of obsmarkers in the bundlestore
+--------------------------------------------------
+
+enabling obsmarkers and rebase extension
+
+  $ cat >> $HGRCPATH << EOF
+  > [experimental]
+  > evolution = all
+  > [extensions]
+  > rebase =
+  > EOF
+
+  $ cd ../client
+
+  $ hg phase -r . --draft --force
+  $ hg rebase -r 6 -d 3
+  rebasing 6:9b42578d4447 "added f" (tip)
+
+  $ hg glog
+  @  7:99949238d9ac added f
+  |  draft
+  | o  5:b4e4bce66051 added e
+  | |  public
+  | o  4:1bb96358eda2 added d
+  |/   public
+  o  3:bf8a6e3011b3 added c
+  |  public
+  o  2:eaba929e866c added b
+  |  public
+  o  1:6cb0989601f1 added a
+  |  public
+  o  0:67145f466344 initialcommit
+     public
+
+  $ hg push -f
+  pushing to $TESTTMP/repo
+  searching for changes
+  storing changesets on the bundlestore
+  pushing 1 commit:
+      99949238d9ac  added f
+
+XXX: the phase should not have changed here
+  $ hg glog -r .
+  @  7:99949238d9ac added f
+  |  public
+  ~
+
+Unbundling on server to see obsmarkers being applied
+
+  $ cd ../repo
+
+  $ scratchnodes
+  1bb96358eda285b536c6d1c66846a7cdb2336cea 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  6cb0989601f1fb5805238edfb16f3606713d9a0b a4c202c147a9c4bb91bbadb56321fc5f3950f7f2
+  99949238d9ac7f2424a33a46dface6f866afd059 090a24fe63f31d3b4bee714447f835c8c362ff57
+  9b42578d44473575994109161430d65dd147d16d 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  b4e4bce660512ad3e71189e14588a70ac8e31fef 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  bf8a6e3011b345146bbbedbcb1ebd4837571492a 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+  eaba929e866c59bc9a6aada5a9dd2f6990db83c0 0a6e70ecd5b98d22382f69b93909f557ac6a9927
+
+  $ hg glog
+  o  6:9b42578d4447 added f
+  |  draft
+  o  5:b4e4bce66051 added e
+  |  public
+  o  4:1bb96358eda2 added d
+  |  public
+  o  3:bf8a6e3011b3 added c
+  |  public
+  o  2:eaba929e866c added b
+  |  public
+  o  1:6cb0989601f1 added a
+  |  public
+  @  0:67145f466344 initialcommit
+     public
+
+  $ hg unbundle .hg/scratchbranches/filebundlestore/09/0a/090a24fe63f31d3b4bee714447f835c8c362ff57
+  adding changesets
+  adding manifests
+  adding file changes
+  added 1 changesets with 0 changes to 1 files (+1 heads)
+  1 new obsolescence markers
+  obsoleted 1 changesets
+  new changesets 99949238d9ac
+  (run 'hg heads' to see heads, 'hg merge' to merge)
+
+  $ hg glog
+  o  7:99949238d9ac added f
+  |  draft
+  | o  5:b4e4bce66051 added e
+  | |  public
+  | o  4:1bb96358eda2 added d
+  |/   public
+  o  3:bf8a6e3011b3 added c
+  |  public
+  o  2:eaba929e866c added b
+  |  public
+  o  1:6cb0989601f1 added a
+  |  public
+  @  0:67145f466344 initialcommit
+     public

hgext/infinitepush/__init__.py

@@ -72,6 +72,9 b''
     # bundle for storage. Defaults to False.
     storeallparts = True
 
+    # routes each incoming push to the bundlestore. defaults to False
+    pushtobundlestore = True
+
     [remotenames]
     # Client-side option
     # This option should be set only if remotenames extension is enabled.
@@ -163,6 +166,9 b" configitem('scratchbranch', 'storepath',"
 configitem('infinitepush', 'branchpattern',
     default='',
 )
+configitem('infinitepush', 'pushtobundlestore',
+    default=False,
+)
 configitem('experimental', 'server-bundlestore-bookmark',
     default='',
 )
@@ -868,6 +874,56 b' def _getorcreateinfinitepushlogger(op):'
         logger = logger[0]
     return logger
 
+def storetobundlestore(orig, repo, op, unbundler):
+    """stores the incoming bundle coming from push command to the bundlestore
+    instead of applying on the revlogs"""
+
+    repo.ui.status(_("storing changesets on the bundlestore\n"))
+    bundler = bundle2.bundle20(repo.ui)
+
+    # processing each part and storing it in bundler
+    with bundle2.partiterator(repo, op, unbundler) as parts:
+        for part in parts:
+            bundlepart = None
+            if part.type == 'replycaps':
+                # This configures the current operation to allow reply parts.
+                bundle2._processpart(op, part)
+            else:
+                bundlepart = bundle2.bundlepart(part.type, data=part.read())
+                for key, value in part.params.iteritems():
+                    bundlepart.addparam(key, value)
+
+                # Certain parts require a response
+                if part.type in ('pushkey', 'changegroup'):
+                    if op.reply is not None:
+                        rpart = op.reply.newpart('reply:%s' % part.type)
+                        rpart.addparam('in-reply-to', str(part.id),
+                                       mandatory=False)
+                        rpart.addparam('return', '1', mandatory=False)
+
+            op.records.add(part.type, {
+                'return': 1,
+            })
+            if bundlepart:
+                bundler.addpart(bundlepart)
+
+    # storing the bundle in the bundlestore
+    buf = util.chunkbuffer(bundler.getchunks())
+    fd, bundlefile = tempfile.mkstemp()
+    try:
+        try:
+            fp = os.fdopen(fd, 'wb')
+            fp.write(buf.read())
+        finally:
+            fp.close()
+        storebundle(op, {}, bundlefile)
+    finally:
+        try:
+            os.unlink(bundlefile)
+        except Exception:
+            # we would rather see the original exception
+            pass
+
 def processparts(orig, repo, op, unbundler):
 
     # make sure we don't wrap processparts in case of `hg unbundle`
@@ -876,6 +932,10 b' def processparts(orig, repo, op, unbundl'
         if tr.names[0].startswith('unbundle'):
             return orig(repo, op, unbundler)
 
+    # this server routes each push to bundle store
+    if repo.ui.configbool('infinitepush', 'pushtobundlestore'):
+        return storetobundlestore(orig, repo, op, unbundler)
+
     if unbundler.params.get('infinitepush') != 'True':
         return orig(repo, op, unbundler)