[StGit PATCH] Add --file option to pick

[Catalin Marinas <catalin.marinas@gmail.com>]

This allows folding of specific files only.

Signed-off-by: Catalin Marinas <catalin.marinas@gmail.com>
---
 stgit/commands/pick.py |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/stgit/commands/pick.py b/stgit/commands/pick.py
index ee08c01..b0e9114 100644
--- a/stgit/commands/pick.py
+++ b/stgit/commands/pick.py
@@ -52,6 +52,8 @@ options = [
         short = 'Fold the commit object into the current patch'),
     opt('--update', action = 'store_true',
         short = 'Like fold but only update the current patch files'),
+    opt('-f', '--files', action = 'append',
+        short = 'Only fold the given files'),
     opt('--unapplied', action = 'store_true',
         short = 'Keep the patch unapplied')]
 
@@ -83,8 +85,11 @@ def __pick_commit(commit_id, patchname, options):
         out.start('Folding commit %s' % commit_id)
 
         # try a direct git apply first
-        if not git.apply_diff(bottom, top):
-            git.merge_recursive(bottom, git.get_head(), top)
+        if not git.apply_diff(bottom, top, files = options.files):
+            if options.files:
+                raise CmdException, 'Patch folding failed'
+            else:
+                git.merge_recursive(bottom, git.get_head(), top)
 
         out.done()
     elif options.update:
@@ -152,6 +157,9 @@ def func(parser, options, args):
     if not args:
         parser.error('incorrect number of arguments')
 
+    if options.files and not options.fold:
+        parser.error('--file can only be specified with --fold')
+
     if not options.unapplied:
         check_local_changes()
         check_conflicts()