Don't die when there are no branches

[stgit] / stgit / commands / branch.py

diff --git a/stgit/commands/branch.py b/stgit/commands/branch.py
index ccf1f6b..2218bbb 100644 (file)
--- a/stgit/commands/branch.py
+++ b/stgit/commands/branch.py
@@ -18,28 +18,36 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 """
 
-import sys, os
+import sys, os, time
 from optparse import OptionParser, make_option
 
 from stgit.commands.common import *
 from stgit.utils import *
-from stgit import stack, git
+from stgit import stack, git, basedir
 
 
 help = 'manage development branches'
 usage = """%prog [options] branch-name [commit-id]
 
-Create, list, switch between, rename, or delete development branches
+Create, clone, switch between, rename, or delete development branches
 within a git repository.  By default, a single branch called 'master'
 is always created in a new repository.  This subcommand allows you to
-manage several patch series in the same repository.
+manage several patch series in the same repository via GIT branches.
 
 When displaying the branches, the names can be prefixed with
-'s' (StGIT managed) or 'p' (protected)."""
+'s' (StGIT managed) or 'p' (protected).
+
+If not given any options, switch to the named branch."""
 
 options = [make_option('-c', '--create',
                        help = 'create a new development branch',
                        action = 'store_true'),
+           make_option('--clone',
+                       help = 'clone the contents of the current branch',
+                       action = 'store_true'),
+           make_option('--convert',
+                       help = 'switch between old and new format branches',
+                       action = 'store_true'),
            make_option('--delete',
                        help = 'delete an existing development branch',
                        action = 'store_true'),
@@ -116,14 +124,42 @@ def func(parser, options, args):
 
         tree_id = None
         if len(args) == 2:
-            tree_id = args[1]
-
-        git.create_branch(args[0], tree_id)
-        stack.Series(args[0]).init()
+            tree_id = git_id(args[1])
+        
+        stack.Series(args[0]).init(create_at = tree_id)
 
         print 'Branch "%s" created.' % args[0]
         return
 
+    elif options.clone:
+
+        if len(args) == 0:
+            clone = crt_series.get_branch() + \
+                    time.strftime('-%C%y%m%d-%H%M%S')
+        elif len(args) == 1:
+            clone = args[0]
+        else:
+            parser.error('incorrect number of arguments')
+
+        check_local_changes()
+        check_conflicts()
+        check_head_top_equal()
+
+        print 'Cloning current branch to "%s"...' % clone,
+        sys.stdout.flush()
+        crt_series.clone(clone)
+        print 'done'
+
+        return
+
+    elif options.convert:
+
+        if len(args) != 0:
+            parser.error('incorrect number of arguments')
+
+        crt_series.convert()
+        return
+
     elif options.delete:
 
         if len(args) != 1:
@@ -136,13 +172,16 @@ def func(parser, options, args):
         if len(args) != 0:
             parser.error('incorrect number of arguments')
 
-        branches = os.listdir(os.path.join(git.get_base_dir(), 'refs', 'heads'))
+        branches = os.listdir(os.path.join(basedir.get(), 'refs', 'heads'))
         branches.sort()
-        max_len = max([len(i) for i in branches])
 
-        print 'Available branches:'
-        for i in branches:
-            __print_branch(i, max_len)
+        if branches:
+            print 'Available branches:'
+            max_len = max([len(i) for i in branches])
+            for i in branches:
+                __print_branch(i, max_len)
+        else:
+            print 'No branches'
         return
 
     elif options.protect: