# HG changeset patch
# User Pierre-Yves David <pierre-yves.david@octobus.net>
# Date 2021-05-03 20:48:31
# Node ID 87d057137f8215185ae9fb6e89ef60cf325d9da1
# Parent  2b69555e4875b924c33899e03943d65a4bd58378

revlog: apply compression mode while reading sidedata

Right now, we only store things as PLAIN, but we are ready for some compression
now. Future changeset will start using some.

Differential Revision: https://phab.mercurial-scm.org/D10654

diff --git a/mercurial/revlog.py b/mercurial/revlog.py
--- a/mercurial/revlog.py
+++ b/mercurial/revlog.py
@@ -2061,7 +2061,19 @@ class revlog(object):
         if sidedata_size == 0:
             return {}
 
-        segment = self._getsegment(sidedata_offset, sidedata_size)
+        comp_segment = self._getsegment(sidedata_offset, sidedata_size)
+        comp = self.index[rev][11]
+        if comp == COMP_MODE_PLAIN:
+            segment = comp_segment
+        elif comp == COMP_MODE_DEFAULT:
+            segment = self._decompressor(comp_segment)
+        elif comp == COMP_MODE_INLINE:
+            segment = self.decompress(comp_segment)
+        else:
+            msg = 'unknown compression mode %d'
+            msg %= comp
+            raise error.RevlogError(msg)
+
         sidedata = sidedatautil.deserialize_sidedata(segment)
         return sidedata