git merge already allows us to sign commits, and git rebase has recently
learned how to do so as well.  Teach git pull to parse the -S/--gpg-sign
option and pass this along to merge or rebase, as appropriate.

Signed-off-by: brian m. carlson <sand...@crustytoothpaste.net>
---
 git-pull.sh | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/git-pull.sh b/git-pull.sh
index 0a5aa2c..6986e0f 100755
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -138,6 +138,15 @@ do
        --no-verify-signatures)
                verify_signatures=--no-verify-signatures
                ;;
+       --gpg-sign|-S)
+               gpg_sign_args=-S
+               ;;
+       --gpg-sign=*)
+               gpg_sign_args=$(git rev-parse --sq-quote "-S${1#--gpg-sign=}")
+               ;;
+       -S*)
+               gpg_sign_args=$(git rev-parse --sq-quote "$1")
+               ;;
        --d|--dr|--dry|--dry-|--dry-r|--dry-ru|--dry-run)
                dry_run=--dry-run
                ;;
@@ -305,11 +314,13 @@ merge_name=$(git fmt-merge-msg $log_arg 
<"$GIT_DIR/FETCH_HEAD") || exit
 case "$rebase" in
 true)
        eval="git-rebase $diffstat $strategy_args $merge_args $rebase_args 
$verbosity"
+       eval="$eval $gpg_sign_args"
        eval="$eval --onto $merge_head ${oldremoteref:-$merge_head}"
        ;;
 *)
        eval="git-merge $diffstat $no_commit $verify_signatures $edit $squash 
$no_ff $ff_only"
-       eval="$eval  $log_arg $strategy_args $merge_args $verbosity $progress"
+       eval="$eval $log_arg $strategy_args $merge_args $verbosity $progress"
+       eval="$eval $gpg_sign_args"
        eval="$eval \"\$merge_name\" HEAD $merge_head"
        ;;
 esac
-- 
1.9.0.rc3.1008.gd08b47c.dirty

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