allow use of edenapi push for eden integration tests

Summary:
# Context

The new AugmentedManifest format used by Sapling and Mononoke will support looking up Trees/Blobs from CAS via (Blake3,size) pairs. We already provide a way for users to get (Blake3,size) pairs for blobs, but there is currently no easy way to get this information for trees.

We want to add support to getAttributesFromFilesV2 for looking up the (Blake3,size) pairs for trees as well. To do this, we'll need to add a method for querying TreeMetadata (including size and Blake3 hashes) via the SaplingBackingStore.

This initial implementation of TreeMetadata will only include the following features:

1) Ability to query TreeMetadata from the SaplingBackingStore via a getTreeMetadata endpoint
2) The ability to request TreeMetadata from the getAttributesFromFilesV2 thrift endpoint

In the future, we will extend the implementation to support:

1) Automatically fetching TreeMetadata during BackingStore::getTree requests
2) Caching TreeMetadata in Eden's in-memory caches

# This diff

allow use of edenapi push for integration tests so that we can enable eagerepo usage in eden integration tests on Windows

Reviewed By: muirdm

Differential Revision: D59662770

fbshipit-source-id: 2c9e53cba9b6b09d28dfed870a63fc1619a6e16a

Author: MichaelCuevas

eden/scm/sapling/edenapi_upload.py

@@ -79,7 +79,7 @@ def _uploadfilenodes(repo, fctxs):
     dpack, _hpack = repo.fileslog.getmutablelocalpacks()
     try:
         with repo.ui.timesection("http.edenapi.upload_files"):
-            use_sha1 = util.istest() and "sha1-only" in repo.edenapi.capabilities()
+            use_sha1 = "sha1-only" in repo.edenapi.capabilities()
             stream, _stats = repo.edenapi.uploadfiles(dpack, keys, use_sha1)
             items = list(stream)
             repo.ui.status(

eden/scm/sapling/push.py

@@ -7,7 +7,7 @@
 from enum import Enum
 from typing import Dict, List, Optional
 
-from . import edenapi_upload, error, hg, mutation, phases, scmutil
+from . import edenapi_upload, error, hg, mutation, phases, scmutil, util
 from .bookmarks import readremotenames, saveremotenames
 from .i18n import _, _n, _x
 from .node import bin, hex, nullhex, short
@@ -42,10 +42,6 @@ def get_edenapi_for_dest(repo, _dest):
     # default push dest is the same as edenapi.url config.
     try:
         edenapi = repo.edenapi
-        if edenapi.url().startswith("eager:"):
-            # todo (zhaolong): implement push related EdenAPIs for eagerepo
-            return None
-
         return edenapi
     except Exception:
         return None