Merge branch 'maint-1.7.0' into maint

[git.git] / git-submodule.sh

diff --git a/git-submodule.sh b/git-submodule.sh
index d3c583d0113e133b8fc75b533ff3f88d2a9c7efe..3319b836b217a26b4ac55ae5ced328ffafa0a015 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -555,12 +555,17 @@ cmd_summary() {
 
        test $summary_limit = 0 && return
 
-       if rev=$(git rev-parse -q --verify "$1^0")
+       if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
        then
                head=$rev
-               shift
+               test $# = 0 || shift
+       elif test -z "$1" -o "$1" = "HEAD"
+       then
+               # before the first commit: compare with an empty tree
+               head=$(git hash-object -w -t tree --stdin </dev/null)
+               test -z "$1" || shift
        else
-               head=HEAD
+               head="HEAD"
        fi
 
        if [ -n "$files" ]