Hi,

Here are the patches that allow transport helpers to be completely transparent;
renaming branches, deleting them, custom refspecs, --force, --dry-run,
reporting forced update, everything works.

Some of these were were sent before and rejected without a reason, but here
they are again in case anybody is interested.

Diff from v3:

diff --git a/Documentation/gitremote-helpers.txt 
b/Documentation/gitremote-helpers.txt
index f1f4ca9..e75699c 100644
--- a/Documentation/gitremote-helpers.txt
+++ b/Documentation/gitremote-helpers.txt
@@ -437,6 +437,10 @@ set by Git if the remote helper has the 'option' 
capability.
 'option check-connectivity' \{'true'|'false'\}::
        Request the helper to check connectivity of a clone.
 
+'option force' \{'true'|'false'\}::
+       Request the helper to perform a force update.  Defaults to
+       'false'.
+
 SEE ALSO
 --------
 linkgit:git-remote[1]
diff --git a/git-remote-testgit.sh b/git-remote-testgit.sh
index 6d2f282..716aa4c 100755
--- a/git-remote-testgit.sh
+++ b/git-remote-testgit.sh
@@ -39,6 +39,7 @@ do
                fi
                test -n "$GIT_REMOTE_TESTGIT_SIGNED_TAGS" && echo "signed-tags"
                test -n "$GIT_REMOTE_TESTGIT_NO_PRIVATE_UPDATE" && echo 
"no-private-update"
+               echo 'option'
                echo
                ;;
        list)
@@ -93,6 +94,7 @@ do
                before=$(git for-each-ref --format=' %(refname) %(objectname) ')
 
                git fast-import \
+                       ${force:+--force} \
                        ${testgitmarks:+"--import-marks=$testgitmarks"} \
                        ${testgitmarks:+"--export-marks=$testgitmarks"} \
                        --quiet
@@ -115,6 +117,20 @@ do
 
                echo
                ;;
+       option\ *)
+               read cmd opt val <<-EOF
+               $line
+               EOF
+               case $opt in
+               force)
+                       test $val = "true" && force="true" || force=
+                       echo "ok"
+                       ;;
+               *)
+                       echo "unsupported"
+                       ;;
+               esac
+               ;;
        '')
                exit
                ;;
diff --git a/t/t5801-remote-helpers.sh b/t/t5801-remote-helpers.sh
index be543c0..c667965 100755
--- a/t/t5801-remote-helpers.sh
+++ b/t/t5801-remote-helpers.sh
@@ -102,6 +102,19 @@ test_expect_success 'push delete branch' '
         rev-parse --verify refs/heads/new-name
 '
 
+test_expect_success 'forced push' '
+       (cd local &&
+       git checkout -b force-test &&
+       echo content >> file &&
+       git commit -a -m eight &&
+       git push origin force-test &&
+       echo content >> file &&
+       git commit -a --amend -m eight-modified &&
+       git push --force origin force-test
+       ) &&
+       compare_refs local refs/heads/force-test server refs/heads/force-test
+'
+
 test_expect_success 'cloning without refspec' '
        GIT_REMOTE_TESTGIT_REFSPEC="" \
        git clone "testgit::${PWD}/server" local2 2>error &&

Felipe Contreras (10):
  transport-helper: fix extra lines
  transport-helper: don't update refs in dry-run
  transport-helper: add 'force' to 'export' helpers
  transport-helper: check for 'forced update' message
  fast-export: improve argument parsing
  fast-export: add new --refspec option
  transport-helper: add support for old:new refspec
  fast-import: add support to delete refs
  fast-export: add support to delete refs
  transport-helper: add support to delete branches

 Documentation/git-fast-export.txt   |  4 ++++
 Documentation/git-fast-import.txt   |  3 +++
 Documentation/gitremote-helpers.txt |  4 ++++
 builtin/fast-export.c               | 47 ++++++++++++++++++++++++++++++++++++-
 fast-import.c                       | 13 +++++++---
 git-remote-testgit.sh               | 16 +++++++++++++
 t/t5801-remote-helpers.sh           | 23 +++++++++++++++++-
 t/t9300-fast-import.sh              | 18 ++++++++++++++
 t/t9350-fast-export.sh              | 18 ++++++++++++++
 transport-helper.c                  | 47 +++++++++++++++++++++++++------------
 10 files changed, 173 insertions(+), 20 deletions(-)

-- 
1.8.4.2+fc1

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