repo sync下载代码时经常 fatal: read error: Connection reset by peer

可能是向同一个repo url连接数过多引起的吧

此补丁增加了 repo sync --ignore-list选项， 配合repo sync -j1 使用，可以在失败后不再重新同步已经同步过的工程，能缓解出错的情况

diff --git a/project.py b/project.py
index 22e4a5d..f2e7ccc 100644
--- a/project.py
+++ b/project.py
@@ -490,7 +490,8 @@ class Project(object):
                sync_s = False,
                upstream = None,
                parent = None,
-               is_derived = False):
+               is_derived = False,
+               is_ignored = False):
     """Init a Project object.
 
     Args:
@@ -536,6 +537,7 @@ class Project(object):
     self.upstream = upstream
     self.parent = parent
     self.is_derived = is_derived
+    self.is_ignored = is_ignored
     self.subprojects = []
 
     self.snapshots = {}
diff --git a/subcmds/sync.py b/subcmds/sync.py
index 9ed84b9..d3639b1 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -192,6 +192,10 @@ later is required to fix a server side protocol bug.
     p.add_option('--no-tags',
                  dest='no_tags', action='store_true',
                  help="don't fetch tags")
+    p.add_option('--ignore-list',
+                 dest='ignore_list', action='store_true',
+                 help="don't fetch projects in ignore-list")
+
     if show_smart:
       p.add_option('-s', '--smart-sync',
                    dest='smart_sync', action='store_true',
@@ -267,12 +271,30 @@ later is required to fix a server side protocol bug.
         lock.release()
       sem.release()
 
+  def Append_ignore_projects(self,name):
+    file_name = 'project.ignore'
+    file_path = os.path.join(self.manifest.repodir, file_name)
+
+    #if os.path.exists(file_path):
+    fd = open(file_path, 'a')
+    try:
+      print(name, file=fd)
+    finally:
+      fd.close()
+
   def _Fetch(self, projects, opt):
     fetched = set()
     pm = Progress('Fetching projects', len(projects))
 
     if self.jobs == 1:
       for project in projects:
+        if project.is_ignored:
+          print("Ignore project={0}".format(project.name))
+          pm.update()
+          fetched.add(project.gitdir)
+          continue
+
+        print("Fetching project={0}".format(project.name))
         pm.update()
         if project.Sync_NetworkHalf(
             quiet=opt.quiet,
@@ -280,6 +302,9 @@ later is required to fix a server side protocol bug.
             clone_bundle=not opt.no_clone_bundle,
             no_tags=opt.no_tags):
           fetched.add(project.gitdir)
+          print("\nFetchDone: {0}".format(project.name))
+          if opt.ignore_list:
+            self.Append_ignore_projects(project.relpath)
         else:
           print('error: Cannot fetch %s' % project.name, file=sys.stderr)
           if opt.force_broken:
@@ -379,6 +404,18 @@ later is required to fix a server side protocol bug.
     else:
       self.manifest._Unload()
 
+  def GetIgnoreProjectsName(self):
+    file_name = 'project.ignore'
+    file_path = os.path.join(self.manifest.repodir, file_name)
+    project_names = 0
+    if os.path.exists(file_path):
+      fd = open(file_path, 'r')
+      try:
+        project_names = fd.read().split('\n')
+      finally:
+        fd.close()
+    return project_names
+
   def UpdateProjectList(self):
     new_project_paths = []
     for project in self.GetProjects(None, missing_ok=True):
@@ -585,6 +622,20 @@ later is required to fix a server side protocol bug.
                                     missing_ok=True,
                                     submodules_ok=opt.fetch_submodules)
 
+    if opt.ignore_list:
+      ignore_projects_name = self.GetIgnoreProjectsName()
+      #print(ignore_projects_name)
+      #for i in all_projects:
+      #   print(i.name)
+      #sys.exit(1)
+      if ignore_projects_name:
+        temp_projects = []
+        for i in all_projects:
+          if i.relpath in ignore_projects_name:
+              i.is_ignored = True
+          temp_projects.append(i)
+        all_projects = temp_projects
+
     self._fetch_times = _FetchTimes(self.manifest)
     if not opt.local_only:
       to_fetch = []