# HG changeset patch
# User Martin von Zweigbergk <martinvonz@google.com>
# Date 1604009480 25200
# Node ID bfdd8866f0b7235584f40694483fadb51596c6c5
# Parent  3083e1936a1aefda217fe7c4cb3d7d9cd59dbe1b
evolve: make the `displayer` we pass around just a function

We only depend on its `.show(ctx)` function, so it's enough to pass
around that function instead. That will make it easier to replace the
function by another one in a later patch.

diff -r 3083e1936a1a -r bfdd8866f0b7 hgext3rd/evolve/__init__.py
--- a/hgext3rd/evolve/__init__.py	Thu Oct 29 14:14:00 2020 -0700
+++ b/hgext3rd/evolve/__init__.py	Thu Oct 29 15:11:20 2020 -0700
@@ -829,7 +829,7 @@
 def _getcurrenttopic(repo):
     return getattr(repo, 'currenttopic', b'')
 
-def _prevupdate(repo, displayer, target, bookmark, dryrun, mergeopt):
+def _prevupdate(repo, display, target, bookmark, dryrun, mergeopt):
     if dryrun:
         repo.ui.write(_(b'hg update %s;\n') % target)
         if bookmark is not None:
@@ -863,9 +863,9 @@
                 lockmod.release(tr, lock)
 
     if not repo.ui.quiet:
-        displayer.show(target)
+        display(target)
 
-def _findprevtarget(repo, displayer, movebookmark=False, topic=True):
+def _findprevtarget(repo, display, movebookmark=False, topic=True):
     target = bookmark = None
     wkctx = repo[None]
     p1 = wkctx.p1()
@@ -895,7 +895,7 @@
         choosedrev = utility.revselectionprompt(repo.ui, repo, prevs, header)
         if choosedrev is None:
             for p in parents:
-                displayer.show(p)
+                display(p)
             repo.ui.warn(_(b'multiple parents, explicitly update to one\n'))
         else:
             target = repo[choosedrev]
@@ -940,10 +940,10 @@
         if topic and hastopic:
             template = utility.stacktemplate
 
-        displayer = logcmdutil.changesetdisplayer(ui, repo,
-                                                  {b'template': template})
+        display = logcmdutil.changesetdisplayer(ui, repo,
+                                                {b'template': template}).show
 
-        target, bookmark = _findprevtarget(repo, displayer,
+        target, bookmark = _findprevtarget(repo, display,
                                            opts.get('move_bookmark'), topic)
         if target is not None:
             configoverride = util.nullcontextmanager()
@@ -952,7 +952,7 @@
                     (b'_internal', b'keep-topic'): b'yes'
                 }, source=b'topic-extension')
             with configoverride:
-                _prevupdate(repo, displayer, target, bookmark, dryrunopt,
+                _prevupdate(repo, display, target, bookmark, dryrunopt,
                             mergeopt)
             return 0
         else:
@@ -999,8 +999,8 @@
             children = [ctx for ctx in children if ctx not in filtered]
             template = utility.stacktemplate
             opts['stacktemplate'] = True
-        displayer = logcmdutil.changesetdisplayer(ui, repo,
-                                                  {b'template': template})
+        display = logcmdutil.changesetdisplayer(ui, repo,
+                                                {b'template': template}).show
 
         # check if we need to evolve while updating to the next child revision
         needevolve = False
@@ -1036,7 +1036,7 @@
 
         if len(children) == 1:
             c = children[0]
-            return _updatetonext(ui, repo, c, displayer, opts)
+            return _updatetonext(ui, repo, c, display, opts)
         elif children:
             cheader = _(b"ambiguous next changeset, choose one to update:")
             crevs = [c.rev() for c in children]
@@ -1044,11 +1044,11 @@
             if choosedrev is None:
                 ui.warn(_(b"ambiguous next changeset:\n"))
                 for c in children:
-                    displayer.show(c)
+                    display(c)
                 ui.warn(_(b"explicitly update to one of them\n"))
                 return 1
             else:
-                return _updatetonext(ui, repo, repo[choosedrev], displayer, opts)
+                return _updatetonext(ui, repo, repo[choosedrev], display, opts)
         else:
             if not opts['evolve'] or not aspchildren:
                 if filtered:
@@ -1069,7 +1069,7 @@
                 if choosedrev is None:
                     ui.warn(_(b"ambiguous next (unstable) changeset:\n"))
                     for c in aspchildren:
-                        displayer.show(repo[c])
+                        display(repo[c])
                     ui.warn(_(b"(run 'hg evolve --rev REV' on one of them)\n"))
                     return 1
                 else:
@@ -1100,7 +1100,7 @@
                   % ui.label(bytes(repo[b'.']), b'evolve.node'))
     return 0
 
-def _updatetonext(ui, repo, child, displayer, opts):
+def _updatetonext(ui, repo, child, display, opts):
     """ logic for `hg next` command to update to children and move bookmarks if
     required """
     bm = repo._activebookmark
@@ -1137,7 +1137,7 @@
             finally:
                 lockmod.release(tr, lock)
     if not ui.quiet:
-        displayer.show(child)
+        display(child)
     return 0
 
 @eh.wrapcommand(b'commit')
diff -r 3083e1936a1a -r bfdd8866f0b7 hgext3rd/evolve/cmdrewrite.py
--- a/hgext3rd/evolve/cmdrewrite.py	Thu Oct 29 14:14:00 2020 -0700
+++ b/hgext3rd/evolve/cmdrewrite.py	Thu Oct 29 15:11:20 2020 -0700
@@ -1334,9 +1334,10 @@
         with ui.configoverride(overrides, b'touch'):
             rewriteutil.precheck(repo, revs, b'touch')
     tmpl = utility.shorttemplate
-    displayer = logcmdutil.changesetdisplayer(ui, repo, {b'template': tmpl})
+    display = logcmdutil.changesetdisplayer(ui, repo,
+                                            {b'template': tmpl}).show
     with repo.wlock(), repo.lock(), repo.transaction(b'touch'):
-        touchnodes(ui, repo, revs, displayer, **opts)
+        touchnodes(ui, repo, revs, display, **opts)
 
 def touchnodes(ui, repo, revs, displayer, **opts):
     duplicate = opts['duplicate']
@@ -1355,7 +1356,7 @@
 
         if not (duplicate or allowdivergence):
             if precheck_contentdiv(repo, ctx):
-                displayer.show(ctx)
+                displayer(ctx)
                 index = ui.promptchoice(
                     _(b"reviving this changeset will create divergence"
                       b" unless you make a duplicate.\n(a)llow divergence or"
diff -r 3083e1936a1a -r bfdd8866f0b7 hgext3rd/evolve/evolvecmd.py
--- a/hgext3rd/evolve/evolvecmd.py	Thu Oct 29 14:14:00 2020 -0700
+++ b/hgext3rd/evolve/evolvecmd.py	Thu Oct 29 15:11:20 2020 -0700
@@ -70,23 +70,23 @@
     template = shorttemplate
     if stacktmplt:
         template = stacktemplate
-    displayer = logcmdutil.changesetdisplayer(ui, repo,
-                                              {b'template': template})
+    display = logcmdutil.changesetdisplayer(ui, repo,
+                                            {b'template': template}).show
     if b'orphan' == category:
-        result = _solveorphan(ui, repo, ctx, evolvestate, displayer,
+        result = _solveorphan(ui, repo, ctx, evolvestate, display,
                               dryrun, confirm, progresscb)
     elif b'phasedivergent' == category:
         result = _solvephasedivergence(ui, repo, ctx, evolvestate,
-                                       displayer, dryrun, confirm,
+                                       display, dryrun, confirm,
                                        progresscb)
     elif b'contentdivergent' == category:
-        result = _solvedivergent(ui, repo, ctx, evolvestate, displayer,
+        result = _solvedivergent(ui, repo, ctx, evolvestate, display,
                                  dryrun, confirm, progresscb)
     else:
         assert False, b"unknown trouble category: %s" % (category)
     return result
 
-def _solveorphan(ui, repo, orig, evolvestate, displayer, dryrun=False,
+def _solveorphan(ui, repo, orig, evolvestate, display, dryrun=False,
                  confirm=False, progresscb=None):
     """ Tries to stabilize the changeset orig which is orphan.
 
@@ -144,13 +144,13 @@
     target = repo[newer]
     if not ui.quiet or confirm:
         repo.ui.write(_(b'move:'), label=b'evolve.operation')
-        displayer.show(orig)
+        display(orig)
         # lastsolved: keep track of successor of last troubled cset we evolved
         # to confirm that if atop msg should be suppressed to remove redundancy
         lastsolved = evolvestate.get(b'lastsolved')
         if lastsolved is None or target != repo[lastsolved]:
             repo.ui.write(_(b'atop:'))
-            displayer.show(target)
+            display(target)
     if confirm and ui.prompt(b'perform evolve? [Ny]', b'n') != b'y':
         raise error.Abort(_(b'evolve aborted by user'))
     todo = b'hg rebase -r %s -d %s\n' % (orig, target)
@@ -168,7 +168,7 @@
                               keepbranch, b'orphan')
             return (True, newid)
 
-def _solvephasedivergence(ui, repo, bumped, evolvestate, displayer,
+def _solvephasedivergence(ui, repo, bumped, evolvestate, display,
                           dryrun=False, confirm=False, progresscb=None):
     """Stabilize a phase divergent changeset
 
@@ -195,9 +195,9 @@
 
     if not ui.quiet or confirm:
         repo.ui.write(_(b'recreate:'), label=b'evolve.operation')
-        displayer.show(bumped)
+        display(bumped)
         repo.ui.write(_(b'atop:'))
-        displayer.show(prec)
+        display(prec)
     if confirm and ui.prompt(_(b'perform evolve? [Ny]'), b'n') != b'y':
         raise error.Abort(_(b'evolve aborted by user'))
     if dryrun:
@@ -420,7 +420,7 @@
     with state.saver(evolvestate, {b'current': orig.node()}), configoverride:
         return _relocate(repo, orig, dest, evolvestate, keepbranch=True)
 
-def _solvedivergent(ui, repo, divergent, evolvestate, displayer, dryrun=False,
+def _solvedivergent(ui, repo, divergent, evolvestate, display, dryrun=False,
                     confirm=False, progresscb=None):
     """tries to solve content-divergence of a changeset
 
@@ -486,11 +486,11 @@
 
     if not ui.quiet or confirm:
         ui.write(_(b'merge:'), label=b'evolve.operation')
-        displayer.show(divergent)
+        display(divergent)
         ui.write(_(b'with: '))
-        displayer.show(other)
+        display(other)
         ui.write(_(b'base: '))
-        displayer.show(base)
+        display(base)
     if confirm and ui.prompt(_(b'perform evolve? [Ny]'), b'n') != b'y':
         raise error.Abort(_(b'evolve aborted by user'))
     if dryrun:
@@ -1711,8 +1711,8 @@
     oldid = repo[b'.'].node()
     startctx = repo[b'.']
     dryrunopt = opts.get('dry_run', False)
-    displayer = logcmdutil.changesetdisplayer(ui, repo,
-                                              {b'template': shorttemplate})
+    display = logcmdutil.changesetdisplayer(ui, repo,
+                                            {b'template': shorttemplate}).show
     try:
         ctx = repo[utility._singlesuccessor(repo, repo[b'.'])]
     except utility.MultipleSuccessorsError as exc:
@@ -1720,12 +1720,12 @@
                             b' successors:\n'))
         for ln in exc.successorssets:
             for n in ln:
-                displayer.show(repo[n])
+                display(repo[n])
         return 2
 
     ui.status(_(b'update:'))
     if not ui.quiet:
-        displayer.show(ctx)
+        display(ctx)
 
     if dryrunopt:
         return 0