Add support for partial clone.v1.13.4

A new option, --partial-clone is added to 'repo init' which tells repo
to utilize git's partial clone functionality, which reduces disk and
bandwidth usage when downloading by omitting blob downloads initially.
Different from restricting clone-depth, the user will have full access
to change history, etc., as the objects are downloaded on demand.

Change-Id: I60326744875eac16521a007bd7d5481112a98749
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/229532
Reviewed-by: Mike Frysinger <vapier@google.com>
Tested-by: Xin Li <delphij@google.com>

1 files changed, 20 insertions, 1 deletions

diff --git a/subcmds/init.py b/subcmds/init.py
index 1c809ab4..eaa6da50 100644
--- a/subcmds/init.py
+++ b/subcmds/init.py
@@ -115,6 +115,13 @@ to update the working directory files.
     g.add_option('--depth', type='int', default=None,
                  dest='depth',
                  help='create a shallow clone with given depth; see git clone')
+    g.add_option('--partial-clone', action='store_true',
+                 dest='partial_clone',
+                 help='perform partial clone (https://git-scm.com/'
+                 'docs/gitrepository-layout#_code_partialclone_code)')
+    g.add_option('--clone-filter', action='store', default='blob:none',
+                 dest='clone_filter',
+                 help='filter for use with --partial-clone [default: %default]')
     g.add_option('--archive',
                  dest='archive', action='store_true',
                  help='checkout an archive instead of a git repository for '
@@ -253,13 +260,25 @@ to update the working directory files.
               'in another location.', file=sys.stderr)
         sys.exit(1)
 
+    if opt.partial_clone:
+      if opt.mirror:
+        print('fatal: --mirror and --partial-clone are mutually exclusive',
+              file=sys.stderr)
+        sys.exit(1)
+      m.config.SetString('repo.partialclone', 'true')
+      if opt.clone_filter:
+        m.config.SetString('repo.clonefilter', opt.clone_filter)
+    else:
+      opt.clone_filter = None
+
     if opt.submodules:
       m.config.SetString('repo.submodules', 'true')
 
     if not m.Sync_NetworkHalf(is_new=is_new, quiet=opt.quiet,
         clone_bundle=not opt.no_clone_bundle,
         current_branch_only=opt.current_branch_only,
-        no_tags=opt.no_tags, submodules=opt.submodules):
+        no_tags=opt.no_tags, submodules=opt.submodules,
+        clone_filter=opt.clone_filter):
       r = m.GetRemote(m.remote.name)
       print('fatal: cannot obtain manifest %s' % r.url, file=sys.stderr)