sync: only print error.GitError, don't raise that exception.

In _FetchOne & _CheckOne, only print error.GitError exception,
but other exceptions are still thrown

Fixes the GitError exceptions from /usr/lib/python3.8/multiprocessing/pool.py
exiting the repo sync.

Tested the code with the following commands and verified repo sync
continues after fetch error because of an invalid SHA1.

$ ./run_tests -v

$ python3 ~/work/repo/git-repo/repo sync -m manifest_P21623846.xml -j32
...
error.GitError: Cannot fetch platform/vendor/google_devices/redbull/proprietary update-ref: fatal: d5a99e518f09d6abb0c0dfa899594e1ea6232459^0: not a valid SHA1
....

An error like the following when jobs=1
  error.GitError: Cannot checkout platform/vendor/qcom/sdm845/proprietary/qcrilOemHook: Cannot initialize work tree for platform/vendor/qcom/sdm845/proprietary/qcrilOemHook

Bug: https://crbug.com/gerrit/14392
Change-Id: I8922ad6c07c733125419f5698b0f7e32d70c7905
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/303544
Reviewed-by: Mike Frysinger <vapier@google.com>
Tested-by: Raman Tenneti <rtenneti@google.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/subcmds/sync.py b/subcmds/sync.py
index 4763fadc..21bc5e7d 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -354,6 +354,8 @@ later is required to fix a server side protocol bug.
         print('error: Cannot fetch %s from %s'
               % (project.name, project.remote.url),
               file=sys.stderr)
+    except GitError as e:
+      print('error.GitError: Cannot fetch %s' % str(e), file=sys.stderr)
     except Exception as e:
       print('error: Cannot fetch %s (%s: %s)'
             % (project.name, type(e).__name__, str(e)), file=sys.stderr)
@@ -446,6 +448,9 @@ later is required to fix a server side protocol bug.
     try:
       project.Sync_LocalHalf(syncbuf, force_sync=force_sync)
       success = syncbuf.Finish()
+    except GitError as e:
+      print('error.GitError: Cannot checkout %s: %s' %
+            (project.name, str(e)), file=sys.stderr)
     except Exception as e:
       print('error: Cannot checkout %s: %s: %s' %
             (project.name, type(e).__name__, str(e)),