filelog: stop proxying flags() (API)

filelog: stop proxying flags() (API)

Per-revision storage flags are kinda a revlog-centric API. (Except for
the fact that changegroup uses the same integer flags as revlog does
and there's minimal verification that the server's flags map to the
client's storage flags - but that's another problem.)

The last user of flags() was in verify.py and that code was just moved
into revlog.py and is accessed behind the verifyintegrity() file
storage API.

Since there are no more consumers, let's drop the proxy and remove
the method from the file storage interface.

This commit only drops the dedicated API for reading a single
revision's storage flags: we still support reading and writing flags
through the bulk data retrieval and add revision APIs. And since
changegroups encode revlog integer flags over the wire, we'll always
need to support flags at some level. The removal of individual storage
flags may be too premature. But since flags() is now unused, I'd like
to see how far we can get without that dedicated API - especially
since it uses revision numbers instead of nodes.

Differential Revision: https://phab.mercurial-scm.org/D4746

--- a/mercurial/filelog.py	Mon Sep 24 11:27:47 2018 -0700
+++ b/mercurial/filelog.py	Mon Sep 24 11:16:33 2018 -0700
@@ -53,10 +53,6 @@
     def linkrev(self, rev):
         return self._revlog.linkrev(rev)
 
-    # Unused.
-    def flags(self, rev):
-        return self._revlog.flags(rev)
-
     def commonancestorsheads(self, node1, node2):
         return self._revlog.commonancestorsheads(node1, node2)
 

--- a/mercurial/repository.py	Mon Sep 24 11:27:47 2018 -0700
+++ b/mercurial/repository.py	Mon Sep 24 11:16:33 2018 -0700
@@ -502,9 +502,6 @@
     def linkrev(rev):
         """Obtain the changeset revision number a revision is linked to."""
 
-    def flags(rev):
-        """Obtain flags used to affect storage of a revision."""
-
     def iscensored(rev):
         """Return whether a revision's content has been censored."""
 

--- a/mercurial/testing/storage.py	Mon Sep 24 11:27:47 2018 -0700
+++ b/mercurial/testing/storage.py	Mon Sep 24 11:16:33 2018 -0700
@@ -96,15 +96,6 @@
             with self.assertRaises(IndexError):
                 f.linkrev(i)
 
-        self.assertEqual(f.flags(nullrev), 0)
-
-        for i in range(-5, 5):
-            if i == nullrev:
-                continue
-
-            with self.assertRaises(IndexError):
-                f.flags(i)
-
         self.assertFalse(f.iscensored(nullrev))
 
         for i in range(-5, 5):
@@ -193,11 +184,6 @@
         with self.assertRaises(IndexError):
             f.linkrev(1)
 
-        self.assertEqual(f.flags(0), 0)
-
-        with self.assertRaises(IndexError):
-            f.flags(1)
-
         self.assertFalse(f.iscensored(0))
 
         with self.assertRaises(IndexError):
@@ -290,13 +276,6 @@
         with self.assertRaises(IndexError):
             f.linkrev(3)
 
-        self.assertEqual(f.flags(0), 0)
-        self.assertEqual(f.flags(1), 0)
-        self.assertEqual(f.flags(2), 0)
-
-        with self.assertRaises(IndexError):
-            f.flags(3)
-
         self.assertFalse(f.iscensored(0))
         self.assertFalse(f.iscensored(1))
         self.assertFalse(f.iscensored(2))
@@ -957,7 +936,6 @@
             f.addrevision(stored1, tr, 1, node0, nullid,
                           flags=revlog.REVIDX_ISCENSORED)
 
-        self.assertEqual(f.flags(1), revlog.REVIDX_ISCENSORED)
         self.assertTrue(f.iscensored(1))
 
         self.assertEqual(f.revision(1), stored1)

--- a/tests/simplestorerepo.py	Mon Sep 24 11:27:47 2018 -0700
+++ b/tests/simplestorerepo.py	Mon Sep 24 11:16:33 2018 -0700
@@ -228,7 +228,7 @@
 
         return self._indexbyrev[rev][b'linkrev']
 
-    def flags(self, rev):
+    def _flags(self, rev):
         validaterev(rev)
 
         return self._indexbyrev[rev][b'flags']
@@ -243,8 +243,8 @@
         validaterev(baserev)
         validaterev(rev)
 
-        if ((self.flags(baserev) & revlog.REVIDX_RAWTEXT_CHANGING_FLAGS)
-            or (self.flags(rev) & revlog.REVIDX_RAWTEXT_CHANGING_FLAGS)):
+        if ((self._flags(baserev) & revlog.REVIDX_RAWTEXT_CHANGING_FLAGS)
+            or (self._flags(rev) & revlog.REVIDX_RAWTEXT_CHANGING_FLAGS)):
             return False
 
         return True
@@ -307,7 +307,7 @@
             return b''
 
         rev = self.rev(node)
-        flags = self.flags(rev)
+        flags = self._flags(rev)
 
         path = b'/'.join([self._storepath, hex(node)])
         rawtext = self._svfs.read(path)
@@ -381,7 +381,7 @@
     def iscensored(self, rev):
         validaterev(rev)
 
-        return self.flags(rev) & revlog.REVIDX_ISCENSORED
+        return self._flags(rev) & revlog.REVIDX_ISCENSORED
 
     def commonancestorsheads(self, a, b):
         validatenode(a)