1 files changed, 41 insertions, 1 deletions

diff --git a/scripts/combo-layer b/scripts/combo-layer
index 3ee9eb203d..8db5d7e376 100755
--- a/scripts/combo-layer
+++ b/scripts/combo-layer
@@ -20,6 +20,7 @@
 # with this program; if not, write to the Free Software Foundation, Inc.,
 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 
+import fnmatch
 import os, sys
 import optparse
 import logging
@@ -211,7 +212,18 @@ def action_init(conf, args):
             else:
                 extract_dir = os.getcwd()
             file_filter = repo.get('file_filter', "")
-            runcmd("git archive %s | tar -x -C %s %s" % (initialrev, extract_dir, file_filter), ldir)
+            files = runcmd("git archive %s | tar -x -v -C %s %s" % (initialrev, extract_dir, file_filter), ldir)
+            exclude_patterns = repo.get('file_exclude', '').split()
+            if exclude_patterns:
+                # Implement file removal by letting tar create the
+                # file and then deleting it in the file system
+                # again. Uses the list of files created by tar (easier
+                # than walking the tree).
+                for file in files.split('\n'):
+                    for pattern in exclude_patterns:
+                        if fnmatch.fnmatch(file, pattern):
+                            os.unlink(os.path.join(extract_dir, file))
+                            break
             if not lastrev:
                 lastrev = runcmd("git rev-parse %s" % initialrev, ldir).strip()
                 conf.update(name, "last_revision", lastrev, initmode=True)
@@ -426,6 +438,34 @@ def action_update(conf, args):
                 runcmd("%s %s %s %s" % (repo['hook'], patch, revlist[count], name))
                 count=count-1
 
+        # Step 3a: Filter out unwanted files and patches.
+        exclude = repo.get('file_exclude', '')
+        if exclude:
+            filter = ['filterdiff', '-p1']
+            for path in exclude.split():
+                filter.append('-x')
+                filter.append('%s/%s' % (dest_dir, path) if dest_dir else path)
+            for patch in patchlist[:]:
+                filtered = patch + '.tmp'
+                with open(filtered, 'w') as f:
+                    runcmd(filter + [patch], out=f)
+                # Now check for empty patches.
+                if runcmd(['filterdiff', '--list', filtered]):
+                    # Possibly modified.
+                    os.unlink(patch)
+                    os.rename(filtered, patch)
+                else:
+                    # Empty, ignore it. Must also remove from revlist.
+                    with open(patch, 'r') as f:
+                        fromline = f.readline()
+                    m = re.match(r'''^From ([0-9a-fA-F]+) .*\n''', fromline)
+                    rev = m.group(1)
+                    logger.debug('skipping empty patch %s = %s' % (patch, rev))
+                    os.unlink(patch)
+                    os.unlink(filtered)
+                    patchlist.remove(patch)
+                    revlist.remove(rev)
+
         # Step 4: write patch list and revision list to file, for user to edit later
         patchlist_file = os.path.join(os.getcwd(), patch_dir, "patchlist-%s" % name)
         repo['patchlist'] = patchlist_file