start fixing hard coded ".hg" uses in Python

Summary: Fix some key spots so commands can start to work properly when run in a ".sl" repo.

Reviewed By: DurhamG

Differential Revision: D39040644

fbshipit-source-id: e9049e2c5bcaafe6ff960b23ea0d64eaac368699

Author: Muir Manders

eden/scm/edenscm/cmdutil.py

@@ -20,7 +20,7 @@
 import tempfile
 from typing import Dict
 
-from bindings import renderdag
+from bindings import identity, renderdag
 from edenscm import tracing
 
 from . import (
@@ -882,12 +882,11 @@ def findsubcmd(args, table, partial=False):
 
 
 def findrepo(p):
-    while not os.path.isdir(os.path.join(p, ".hg")):
-        oldp, p = p, os.path.dirname(p)
-        if p == oldp:
-            return None
+    root = identity.sniffroot(p)
+    if root:
+        return root[0]
 
-    return p
+    return None
 
 
 def uncommittedchanges(repo):

eden/scm/edenscm/dirstate.py

@@ -267,7 +267,7 @@ def _checkexec(self) -> bool:
 
     @util.propertycache
     def _checkcase(self) -> bool:
-        return not util.fscasesensitive(self._join(".hg"))
+        return not util.fscasesensitive(self._repo.path)
 
     def _join(self, f: str) -> str:
         # much faster than os.path.join()

eden/scm/edenscm/localrepo.py

@@ -434,7 +434,7 @@ def __init__(self, baseui, path, create=False):
         # If this is a shared repository, this vfs may point to another
         # repository's .hg/store directory.
         self.svfs = None
-        self.path = self.wvfs.join(".hg")
+        self.path = self._rsrepo.dotpath()
         self.origroot = path
         # This is only used by context.workingctx.match in order to
         # detect files in forbidden paths.

eden/scm/edenscmnative/bindings/modules/pyrepo/src/lib.rs

@@ -75,4 +75,8 @@ py_class!(pub class repo |py| {
         repo_ref.invalidate_dag_commits();
         Ok(PyNone)
     }
+
+    def dotpath(&self) -> PyResult<PyPathBuf> {
+        self.inner(py).read().dot_hg_path().try_into().map_pyerr(py)
+    }
 });

eden/scm/tests/test-identity.t

@@ -51,3 +51,9 @@ Clone can create a ".sl" repo.
   updateprogress
   wlock.data
   wlock.lock
+
+  $ cd cloned
+Status kind of runs, but doesn't ignore ".sl" properly (for non-watchman)
+  $ hg status | head -1
+  ? .sl/.dir_lock (?)
+