Merge branch 'jc/reflog-doc'

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 53ab0684f27f071b802abac26f62543ab27fae92..ebfe8f7a4d0697422a826d7878855bf9e92d0060 100644 (file)
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -53,7 +53,7 @@ die () {
 die_with_status () {
        status=$1
        shift
-       echo >&2 "$*"
+       printf >&2 '%s\n' "$*"
        exit "$status"
 }
 
@@ -283,6 +283,18 @@ clear_local_git_env() {
        unset $(git rev-parse --local-env-vars)
 }
 
+# Generate a virtual base file for a two-file merge. Uses git apply to
+# remove lines from $1 that are not in $2, leaving only common lines.
+create_virtual_base() {
+       sz0=$(wc -c <"$1")
+       @@DIFF@@ -u -La/"$1" -Lb/"$1" "$1" "$2" | git apply --no-add
+       sz1=$(wc -c <"$1")
+
+       # If we do not have enough common material, it is not
+       # worth trying two-file merge using common subsections.
+       expr $sz0 \< $sz1 \* 2 >/dev/null || : >"$1"
+}
+
 
 # Platform specific tweaks to work around some commands
 case $(uname -s) in
@@ -335,3 +347,15 @@ then
        }
        : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
 fi
+
+peel_committish () {
+       case "$1" in
+       :/*)
+               peeltmp=$(git rev-parse --verify "$1") &&
+               git rev-parse --verify "${peeltmp}^0"
+               ;;
+       *)
+               git rev-parse --verify "${1}^0"
+               ;;
+       esac
+}