--- a/mercurial/localrepo.py Wed Sep 25 03:58:46 2019 +0200
+++ b/mercurial/localrepo.py Mon Sep 09 22:42:55 2019 +0200
@@ -394,6 +394,10 @@
# This is why once a repository has enabled sparse-read, it becomes required.
SPARSEREVLOG_REQUIREMENT = 'sparserevlog'
+# A repository with the sidedataflag requirement will allow to store extra
+# information for revision without altering their original hashes.
+SIDEDATA_REQUIREMENT = 'exp-sidedata-flag'
+
# Functions receiving (ui, features) that extensions can register to impact
# the ability to load repositories with custom requirements. Only
# functions defined in loaded extensions are called.
@@ -814,6 +818,9 @@
if sparserevlog:
options[b'generaldelta'] = True
+ sidedata = SIDEDATA_REQUIREMENT in requirements
+ options[b'side-data'] = sidedata
+
maxchainlen = None
if sparserevlog:
maxchainlen = revlogconst.SPARSE_REVLOG_MAX_CHAIN_LENGTH
@@ -917,6 +924,7 @@
'generaldelta',
'treemanifest',
REVLOGV2_REQUIREMENT,
+ SIDEDATA_REQUIREMENT,
SPARSEREVLOG_REQUIREMENT,
bookmarks.BOOKMARKS_IN_STORE_REQUIREMENT,
}
@@ -3153,6 +3161,10 @@
requirements.add('generaldelta')
if ui.configbool('format', 'sparse-revlog'):
requirements.add(SPARSEREVLOG_REQUIREMENT)
+
+ # experimental config: format.use-side-data
+ if ui.configbool('format', 'use-side-data'):
+ requirements.add(SIDEDATA_REQUIREMENT)
if ui.configbool('experimental', 'treemanifest'):
requirements.add('treemanifest')