# HG changeset patch
# User alexrayne
# Date 1752765089 -10800
#      Thu Jul 17 18:11:29 2025 +0300
# Branch stable
# Node ID 155bfffa6b80bd997349b5be8051f96f5bd72b6d
# Parent  98f3571f3f4485949b140ffe450ee288b743d2bb
update: --subs=narrow provides update subrepos only for desired parent-repo revision
        by default, hg-subrepos pull all changes

diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -7501,6 +7501,7 @@
         (b'm', b'merge', None, _(b'merge uncommitted changes')),
         (b'd', b'date', b'', _(b'tipmost revision matching date'), _(b'DATE')),
         (b'r', b'rev', b'', _(b'revision'), _(b'REV')),
+        (b'' , b'subs', b'', _(b'subrepo pulling style'), _(b'subs')),
     ]
     + mergetoolopts,
     _(b'[-C|-c|-m] [-d DATE] [[-r] REV]'),
@@ -7578,6 +7579,8 @@
                 hint=_(b'for example: hg update ".::"'),
             )
 
+    setattr(repo, 'opt_subs', opts.get('subs'))
+
     if rev is None or rev == b'':
         rev = node
 
diff --git a/mercurial/subrepo.py b/mercurial/subrepo.py
--- a/mercurial/subrepo.py
+++ b/mercurial/subrepo.py
@@ -792,13 +792,18 @@
             self._cachestorehash(srcurl)
         else:
             self.ui.status(
-                _(b'pulling subrepo %s from %s\n')
-                % (subrelpath(self), urlutil.hidepassword(srcurl))
+                _(b'pulling subrepo %s from %s rev %s\n')
+                % (subrelpath(self), urlutil.hidepassword(srcurl), revision)
             )
             cleansub = self.storeclean(srcurl)
             peer = getpeer()
+            heads = None
+            if hasattr(parentrepo, 'opt_subs'):
+                if parentrepo.opt_subs == b'narrow':
+                    heads = [bin(revision)]
+            self._repo.opt_subs = parentrepo.opt_subs
             try:
-                exchange.pull(self._repo, peer)
+                exchange.pull(self._repo, peer, heads = heads )
             finally:
                 peer.close()
             if cleansub:

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