hg update hint

Differential Revision: https://phab.mercurial-scm.org/D834

hgext3rd/tweakdefaults.py

@@ -433,6 +433,11 @@ def update(orig, ui, repo, node=None, rev=None, **kwargs):
     if inactive:
         extensions.unwrapfunction(hg, 'updatetotally', _wrapupdatetotally)
 
+    # If the command succeed a message for 'hg update .^' will appear
+    # suggesting to use hg prev
+    if node == '.^':
+        ui.status(_("(hint: use 'hg prev' to move to the parent changeset)\n"))
+
     return result
 
 def _wrapupdatetotally(orig, ui, repo, checkout, brev, *args, **kwargs):

tests/test-tweakdefaults-ordering.t

@@ -20,6 +20,7 @@ Run test
   $ hg up ".^"
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   (leaving bookmark AB)
+  (hint: use 'hg prev' to move to the parent changeset)
   $ touch c
   $ hg commit -Aqm c
   $ hg bookmark C -t AB

tests/test-tweakdefaults-update.t

@@ -23,6 +23,7 @@ Set up the repository.
   |
   o  0
   
+
   $ hg up 3
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
 
@@ -68,3 +69,6 @@ Certain flags shouldn't work together.
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg st
   ? foo
+  $ hg update .^
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (hint: use 'hg prev' to move to the parent changeset)

tests/test-tweakdefaults.t

@@ -79,6 +79,7 @@ Dirty update allowed to same rev, with no conflicts, and --clean
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg update ".^"
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  (hint: use 'hg prev' to move to the parent changeset)
   $ hg update --clean 1
   2 files updated, 0 files merged, 0 files removed, 0 files unresolved