shelve: allow multiple shelves with --patch and --stat

shelve: allow multiple shelves with --patch and --stat

Before this patch, there was a single way to see multiple shelves using
`--patch --list` which show all the shelves. Doing `--patch s1 s2` returns an
error. This patch allows to show multiple shelves using `--patch` and `--stat`.

--- a/hgext/shelve.py	Sat Jan 14 19:41:43 2017 -0800
+++ b/hgext/shelve.py	Sat Jan 14 01:23:07 2017 +0530
@@ -522,14 +522,14 @@
                 for chunk, label in patch.diffstatui(difflines, width=width):
                     ui.write(chunk, label=label)
 
-def singlepatchcmds(ui, repo, pats, opts, subcommand):
-    """subcommand that displays a single shelf"""
-    if len(pats) != 1:
-        raise error.Abort(_("--%s expects a single shelf") % subcommand)
-    shelfname = pats[0]
+def patchcmds(ui, repo, pats, opts, subcommand):
+    """subcommand that displays shelves"""
+    if len(pats) == 0:
+        raise error.Abort(_("--%s expects at least one shelf") % subcommand)
 
-    if not shelvedfile(repo, shelfname, patchextension).exists():
-        raise error.Abort(_("cannot find shelf %s") % shelfname)
+    for shelfname in pats:
+        if not shelvedfile(repo, shelfname, patchextension).exists():
+            raise error.Abort(_("cannot find shelf %s") % shelfname)
 
     listcmd(ui, repo, pats, opts)
 
@@ -967,9 +967,9 @@
     elif checkopt('list'):
         return listcmd(ui, repo, pats, opts)
     elif checkopt('patch'):
-        return singlepatchcmds(ui, repo, pats, opts, subcommand='patch')
+        return patchcmds(ui, repo, pats, opts, subcommand='patch')
     elif checkopt('stat'):
-        return singlepatchcmds(ui, repo, pats, opts, subcommand='stat')
+        return patchcmds(ui, repo, pats, opts, subcommand='stat')
     else:
         return createcmd(ui, repo, pats, opts)
 

--- a/tests/test-shelve.t	Sat Jan 14 19:41:43 2017 -0800
+++ b/tests/test-shelve.t	Sat Jan 14 01:23:07 2017 +0530
@@ -991,7 +991,7 @@
   x
   x
 
-shelve --patch and shelve --stat should work with a single valid shelfname
+shelve --patch and shelve --stat should work with valid shelfnames
 
   $ hg up --clean .
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
@@ -1008,11 +1008,29 @@
   shelved as default-01
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg shelve --patch default default-01
-  abort: --patch expects a single shelf
-  [255]
+  default-01      (*)* changes to: create conflict (glob)
+  
+  diff --git a/shelf-patch-b b/shelf-patch-b
+  new file mode 100644
+  --- /dev/null
+  +++ b/shelf-patch-b
+  @@ -0,0 +1,1 @@
+  +patch b
+  default         (*)* changes to: create conflict (glob)
+  
+  diff --git a/shelf-patch-a b/shelf-patch-a
+  new file mode 100644
+  --- /dev/null
+  +++ b/shelf-patch-a
+  @@ -0,0 +1,1 @@
+  +patch a
   $ hg shelve --stat default default-01
-  abort: --stat expects a single shelf
-  [255]
+  default-01      (*)* changes to: create conflict (glob)
+   shelf-patch-b |  1 +
+   1 files changed, 1 insertions(+), 0 deletions(-)
+  default         (*)* changes to: create conflict (glob)
+   shelf-patch-a |  1 +
+   1 files changed, 1 insertions(+), 0 deletions(-)
   $ hg shelve --patch default
   default         (*)* changes to: create conflict (glob)
   
@@ -1032,6 +1050,12 @@
   $ hg shelve --stat nonexistentshelf
   abort: cannot find shelf nonexistentshelf
   [255]
+  $ hg shelve --patch default nonexistentshelf
+  abort: cannot find shelf nonexistentshelf
+  [255]
+  $ hg shelve --patch
+  abort: --patch expects at least one shelf
+  [255]
 
   $ cd ..