shelve: make listshelves() return shelf names instead of filenames

shelve: make listshelves() return shelf names instead of filenames

All three callers now prefer the shelf name over the filename (already
before my recent patches, two out of three callers preferred the shelf
name).

Differential Revision: https://phab.mercurial-scm.org/D9708

--- a/mercurial/shelve.py	Thu Jan 07 14:54:56 2021 -0800
+++ b/mercurial/shelve.py	Thu Jan 07 15:24:46 2021 -0800
@@ -630,7 +630,7 @@
 
 
 def listshelves(repo):
-    """return all shelves in repo as list of (time, filename)"""
+    """return all shelves in repo as list of (time, name)"""
     try:
         names = repo.vfs.readdir(shelvedir)
     except OSError as err:
@@ -643,7 +643,7 @@
         if not pfx or sfx != patchextension:
             continue
         mtime = Shelf(repo, pfx).mtime()
-        info.append((mtime, shelvedfile(repo, pfx).filename()))
+        info.append((mtime, pfx))
     return sorted(info, reverse=True)
 
 
@@ -656,22 +656,21 @@
     namelabel = b'shelve.newest'
     ui.pager(b'shelve')
     for mtime, name in listshelves(repo):
-        sname = util.split(name)[1]
-        if pats and sname not in pats:
+        if pats and name not in pats:
             continue
-        ui.write(sname, label=namelabel)
+        ui.write(name, label=namelabel)
         namelabel = b'shelve.name'
         if ui.quiet:
             ui.write(b'\n')
             continue
-        ui.write(b' ' * (16 - len(sname)))
+        ui.write(b' ' * (16 - len(name)))
         used = 16
         date = dateutil.makedate(mtime)
         age = b'(%s)' % templatefilters.age(date, abbrev=True)
         ui.write(age, label=b'shelve.age')
         ui.write(b' ' * (12 - len(age)))
         used += 12
-        with Shelf(repo, sname).open_patch() as fp:
+        with Shelf(repo, name).open_patch() as fp:
             while True:
                 line = fp.readline()
                 if not line:
@@ -701,8 +700,7 @@
         if not shelves:
             raise error.Abort(_(b"there are no shelves to show"))
         mtime, name = shelves[0]
-        sname = util.split(name)[1]
-        pats = [sname]
+        pats = [name]
 
     for shelfname in pats:
         if not Shelf(repo, shelfname).exists():
@@ -1122,7 +1120,7 @@
         shelved = listshelves(repo)
         if not shelved:
             raise error.StateError(_(b'no shelved changes to apply!'))
-        basename = util.split(shelved[0][1])[1]
+        basename = shelved[0][1]
         ui.status(_(b"unshelving change '%s'\n") % basename)
     else:
         basename = shelved[0]