tests: conditionalize tests based on presence of revlogs for files

~85 tests don't like our non-revlog file store for various reasons.

This commit introduces hghave functionality for declaring and querying
repository features. By default, we assume repositories have
revlog-based file storage. But if the HGREPOFEATURES environment
variable is set, we can override the default set of repository
features. If you run the test harness with our simplestorerepo
extension and an environment variable set to the proper value, you
can override the hghave defaults to agree with simplestorerepo's
version of reality.

Various tests have been modified so behavior dependent on revlog-based
file storage is marked as such.

This fixes a handful of test failures with our custom file storage
extension. But dozens remain. The point of this commit is to demonstrate
how tests will need to be modified to account for custom storage
implementations.

TBH, I'm not convinced hghave is the proper layer for repository
feature detection. I /think/ we'll eventually want something in
run-tests.py itself. But that would require inventing a new primitive
in the test harness. This is all very alpha at the moment. So I think
hghave is an acceptable place to hang this feature detection. I think
the right time to be thinking about integrating this into run-tests.py
is *after* we have a stable alternate storage implementation in core.
For now, let's try to make progress towards the idea of an alternate
storage backend.

Differential Revision: https://phab.mercurial-scm.org/D3030

tests/hghave.py

@@ -717,3 +717,47 b' def has_xdiff():'
         return bdiff.xdiffblocks(b'', b'') == [(0, 0, 0, 0)]
     except (ImportError, AttributeError):
         return False
+
+def getrepofeatures():
+    """Obtain set of repository features in use.
+
+    HGREPOFEATURES can be used to define or remove features. It contains
+    a space-delimited list of feature strings. Strings beginning with ``-``
+    mean to remove.
+    """
+    # Default list provided by core.
+    features = {
+        'revlogstore',
+    }
+
+    # Features that imply other features.
+    implies = {
+        'simplestore': ['-revlogstore'],
+    }
+
+    for override in os.environ.get('HGREPOFEATURES', '').split(' '):
+        if not override:
+            continue
+
+        if override.startswith('-'):
+            if override[1:] in features:
+                features.remove(override[1:])
+        else:
+            features.add(override)
+
+            for imply in implies.get(override, []):
+                if imply.startswith('-'):
+                    if imply[1:] in features:
+                        features.remove(imply[1:])
+                else:
+                    features.add(imply)
+
+    return features
+
+@check('reporevlogstore', 'repository using the default revlog store')
+def has_reporevlogstore():
+    return 'revlogstore' in getrepofeatures()
+
+@check('reposimplestore', 'repository using simple storage extension')
+def has_reposimplestore():
+    return 'simplestore' in getrepofeatures()

tests/simplestorerepo.py

@@ -5,6 +5,11 b''
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 
+# To use this with the test suite:
+#
+#   $ HGREPOFEATURES="simplestore" ./run-tests.py \
+#       --extra-config-opt extensions.simplestore=`pwd`/simplestorerepo.py
+
 from __future__ import absolute_import
 
 from mercurial.i18n import _

tests/test-clone.t

@@ -28,12 +28,14 b' Create a non-inlined filelog:'
 
 List files in store/data (should show a 'b.d'):
 
+#if reporevlogstore
   $ for i in .hg/store/data/*; do
   >   echo $i
   > done
   .hg/store/data/a.i
   .hg/store/data/b.d
   .hg/store/data/b.i
+#endif
 
 Trigger branchcache creation:
 

tests/test-contrib-perf.t

@@ -158,7 +158,9 b' perfstatus'
   $ hg perfpathcopies 1 2
   $ hg perfrawfiles 2
   $ hg perfrevlogindex -c
+#if reporevlogstore
   $ hg perfrevlogrevisions .hg/store/data/a.i
+#endif
   $ hg perfrevlogrevision -m 0
   $ hg perfrevlogchunks -c
   $ hg perfrevrange

tests/test-convert.t

@@ -516,8 +516,14 b' testing: convert must not produce duplic'
 contents of fncache file:
 
   $ cat b/.hg/store/fncache | sort
-  data/a.i
-  data/b.i
+  data/a.i (reporevlogstore !)
+  data/b.i (reporevlogstore !)
+  data/a/0f3078c2d7345d887b54f7c9dab0d91bfa57fd07 (reposimplestore !)
+  data/a/4271c3e84237016935a176b6f282fde2128458b0 (reposimplestore !)
+  data/a/b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3 (reposimplestore !)
+  data/a/index (reposimplestore !)
+  data/b/37d9b5d994eab34eda9c16b195ace52c7b129980 (reposimplestore !)
+  data/b/index (reposimplestore !)
 
 test bogus URL
 

tests/test-copy.t

@@ -86,8 +86,10 b' this should show the rename information '
   copy: a
   copyrev: b789fdd96dc2f3bd229c1dd8eedf0fc60e2b68e3
 
+#if reporevlogstore
   $ md5sum.py .hg/store/data/b.i
   44913824c8f5890ae218f9829535922e  .hg/store/data/b.i
+#endif
   $ hg cat b > bsum
   $ md5sum.py bsum
   60b725f10c9c85c70d97880dfe8191b3  bsum

tests/test-hardlinks.t

@@ -1,4 +1,4 b''
-#require hardlink
+#require hardlink reporevlogstore
 
   $ cat > nlinks.py <<EOF
   > from __future__ import print_function

tests/test-http-proxy.t

@@ -16,7 +16,8 b' url for proxy, stream'
 
   $ http_proxy=http://localhost:$HGPORT1/ hg --config http_proxy.always=True clone --stream http://localhost:$HGPORT/ b
   streaming all changes
-  3 files to transfer, 303 bytes of data
+  3 files to transfer, 303 bytes of data (reporevlogstore !)
+  4 files to transfer, 330 bytes of data (reposimplestore !)
   transferred * bytes in * seconds (*/sec) (glob)
   searching for changes
   no changes found

tests/test-push-warn.t

@@ -153,7 +153,7 b' Specifying a revset that evaluates to nu'
   uncompressed size of bundle content:
        352 (changelog)
        326 (manifests)
-       253  foo
+       25\d  foo (re)
   adding changesets
   adding manifests
   adding file changes

tests/test-relink.t

@@ -73,6 +73,8 b' clone and pull to break links'
 
 relink
 
+#if no-reposimplestore
+
   $ hg relink --debug --config progress.debug=true | fix_path
   relinking $TESTTMP/repo/.hg/store to $TESTTMP/clone/.hg/store
   tip has 2 files, estimated total number of files: 3
@@ -101,3 +103,4 b' check hardlinks'
   $ $PYTHON arelinked.py repo/.hg/store/data/b.i clone/.hg/store/data/b.i
   repo/.hg/store/data/b.i != clone/.hg/store/data/b.i
 
+#endif

tests/test-strip.t

@@ -448,6 +448,7 b' verify fncache is kept up-to-date'
   $ cat .hg/store/fncache | sort
   data/a.i
   data/bar.i
+
   $ hg strip tip
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   saved backup bundle to $TESTTMP/test/.hg/strip-backup/*-backup.hg (glob)

tests/test-subrepo-deep-nested-change.t

@@ -34,6 +34,7 b" Preparing the 'sub1' repo which depends "
   linking [    <=>                                        ] 4\r (no-eol) (esc)
   linking [     <=>                                       ] 5\r (no-eol) (esc)
   linking [      <=>                                      ] 6\r (no-eol) (esc)
+  linking [       <=>                                     ] 7\r (no-eol) (esc) (reposimplestore !)
                                                               \r (no-eol) (esc)
   \r (no-eol) (esc)
   updating [===========================================>] 1/1\r (no-eol) (esc)
@@ -60,6 +61,9 b" Preparing the 'main' repo which depends "
   linking [      <=>                                      ] 6\r (no-eol) (esc)
   linking [       <=>                                     ] 7\r (no-eol) (esc)
   linking [        <=>                                    ] 8\r (no-eol) (esc)
+  linking [         <=>                                   ] 9\r (no-eol) (esc) (reposimplestore !)
+  linking [          <=>                                 ] 10\r (no-eol) (esc) (reposimplestore !)
+  linking [           <=>                                ] 11\r (no-eol) (esc) (reposimplestore !)
                                                               \r (no-eol) (esc)
   \r (no-eol) (esc)
   updating [===========================================>] 3/3\r (no-eol) (esc)
@@ -71,6 +75,7 b" Preparing the 'main' repo which depends "
   linking [    <=>                                        ] 4\r (no-eol) (esc)
   linking [     <=>                                       ] 5\r (no-eol) (esc)
   linking [      <=>                                      ] 6\r (no-eol) (esc)
+  linking [       <=>                                     ] 7\r (no-eol) (esc) (reposimplestore !)
   updating [===========================================>] 1/1\r (no-eol) (esc)
                                                               \r (no-eol) (esc)
   updating to branch default
@@ -161,6 +166,9 b' Clone main'
   linking [      <=>                                      ] 6\r (no-eol) (esc)
   linking [       <=>                                     ] 7\r (no-eol) (esc)
   linking [        <=>                                    ] 8\r (no-eol) (esc)
+  linking [         <=>                                   ] 9\r (no-eol) (esc) (reposimplestore !)
+  linking [          <=>                                 ] 10\r (no-eol) (esc) (reposimplestore !)
+  linking [           <=>                                ] 11\r (no-eol) (esc) (reposimplestore !)
                                                               \r (no-eol) (esc)
   \r (no-eol) (esc)
   updating [===========================================>] 3/3\r (no-eol) (esc)
@@ -174,15 +182,25 b' Clone main'
   linking [      <=>                                      ] 6\r (no-eol) (esc)
   linking [       <=>                                     ] 7\r (no-eol) (esc)
   linking [        <=>                                    ] 8\r (no-eol) (esc)
+  linking [         <=>                                   ] 9\r (no-eol) (esc) (reposimplestore !)
+  linking [          <=>                                 ] 10\r (no-eol) (esc) (reposimplestore !)
+  linking [           <=>                                ] 11\r (no-eol) (esc) (reposimplestore !)
   updating [===========================================>] 3/3\r (no-eol) (esc)
                                                               \r (no-eol) (esc)
   \r (no-eol) (esc)
-  linking [         <=>                                   ] 1\r (no-eol) (esc)
-  linking [          <=>                                  ] 2\r (no-eol) (esc)
-  linking [           <=>                                 ] 3\r (no-eol) (esc)
-  linking [            <=>                                ] 4\r (no-eol) (esc)
-  linking [             <=>                               ] 5\r (no-eol) (esc)
-  linking [              <=>                              ] 6\r (no-eol) (esc)
+  linking [         <=>                                   ] 1\r (no-eol) (esc) (no-reposimplestore !)
+  linking [          <=>                                  ] 2\r (no-eol) (esc) (no-reposimplestore !)
+  linking [           <=>                                 ] 3\r (no-eol) (esc) (no-reposimplestore !)
+  linking [            <=>                                ] 4\r (no-eol) (esc) (no-reposimplestore !)
+  linking [             <=>                               ] 5\r (no-eol) (esc) (no-reposimplestore !)
+  linking [              <=>                              ] 6\r (no-eol) (esc) (no-reposimplestore !)
+  linking [            <=>                                ] 1\r (no-eol) (esc) (reposimplestore !)
+  linking [             <=>                               ] 2\r (no-eol) (esc) (reposimplestore !)
+  linking [              <=>                              ] 3\r (no-eol) (esc) (reposimplestore !)
+  linking [               <=>                             ] 4\r (no-eol) (esc) (reposimplestore !)
+  linking [                <=>                            ] 5\r (no-eol) (esc) (reposimplestore !)
+  linking [                 <=>                           ] 6\r (no-eol) (esc) (reposimplestore !)
+  linking [                  <=>                          ] 7\r (no-eol) (esc) (reposimplestore !)
   updating [===========================================>] 1/1\r (no-eol) (esc)
                                                               \r (no-eol) (esc)
   updating to branch default

tests/test-subrepo-recursion.t

@@ -462,6 +462,11 b' cloned:'
   linking [      <=>                                      ] 6\r (no-eol) (esc)
   linking [       <=>                                     ] 7\r (no-eol) (esc)
   linking [        <=>                                    ] 8\r (no-eol) (esc)
+  linking [         <=>                                   ] 9\r (no-eol) (esc) (reposimplestore !)
+  linking [          <=>                                 ] 10\r (no-eol) (esc) (reposimplestore !)
+  linking [           <=>                                ] 11\r (no-eol) (esc) (reposimplestore !)
+  linking [            <=>                               ] 12\r (no-eol) (esc) (reposimplestore !)
+  linking [             <=>                              ] 13\r (no-eol) (esc) (reposimplestore !)
                                                               \r (no-eol) (esc)
 #else
   $ hg clone -U . ../empty
@@ -487,6 +492,13 b' cloned:'
   linking [      <=>                                      ] 6\r (no-eol) (esc)
   linking [       <=>                                     ] 7\r (no-eol) (esc)
   linking [        <=>                                    ] 8\r (no-eol) (esc)
+  linking [         <=>                                   ] 9\r (no-eol) (esc) (reposimplestore !)
+  linking [          <=>                                 ] 10\r (no-eol) (esc) (reposimplestore !)
+  linking [           <=>                                ] 11\r (no-eol) (esc) (reposimplestore !)
+  linking [            <=>                               ] 12\r (no-eol) (esc) (reposimplestore !)
+  linking [             <=>                              ] 13\r (no-eol) (esc) (reposimplestore !)
+  linking [              <=>                             ] 14\r (no-eol) (esc) (reposimplestore !)
+  linking [               <=>                            ] 15\r (no-eol) (esc) (reposimplestore !)
                                                               \r (no-eol) (esc)
   \r (no-eol) (esc)
   archiving (foo) [                                     ] 0/3\r (no-eol) (esc)
@@ -501,6 +513,9 b' cloned:'
   linking [    <=>                                        ] 4\r (no-eol) (esc)
   linking [     <=>                                       ] 5\r (no-eol) (esc)
   linking [      <=>                                      ] 6\r (no-eol) (esc)
+  linking [       <=>                                     ] 7\r (no-eol) (esc) (reposimplestore !)
+  linking [        <=>                                    ] 8\r (no-eol) (esc) (reposimplestore !)
+  linking [         <=>                                   ] 9\r (no-eol) (esc) (reposimplestore !)
                                                               \r (no-eol) (esc)
   \r (no-eol) (esc)
   archiving (foo/bar) [                                 ] 0/1\r (no-eol) (esc)

tests/test-upgrade-repo.t

@@ -1,3 +1,5 b''
+#require no-reposimplestore
+
   $ cat >> $HGRCPATH << EOF
   > [extensions]
   > share =