diffcore-rename: cache file deltas

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index b4aa4b2f4e6b53388ea9ec0ac13316ae0d0d4458..3c325fd1339608d681d3485aa37647d9ac734037 100755 (executable)
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -6,7 +6,7 @@
 # it dies.
 
 # Having this variable in your environment would break scripts because
-# you would cause "cd" to be be taken to unexpected places.  If you
+# you would cause "cd" to be taken to unexpected places.  If you
 # like CDPATH, define it for your interactive shell sessions without
 # exporting it.
 unset CDPATH
@@ -28,16 +28,28 @@ set_reflog_action() {
        fi
 }
 
-is_bare_repository () {
-       git-config --bool --get core.bare ||
-       case "$GIT_DIR" in
-       .git | */.git) echo false ;;
-       *) echo true ;;
+git_editor() {
+       : "${GIT_EDITOR:=$(git config core.editor)}"
+       : "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
+       case "$GIT_EDITOR,$TERM" in
+       ,dumb)
+               echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
+               echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
+               echo >&2 "Please set one of these variables to an appropriate"
+               echo >&2 "editor or run $0 with options that will not cause an"
+               echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
+               exit 1
+               ;;
        esac
+       eval "${GIT_EDITOR:=vi}" '"$@"'
+}
+
+is_bare_repository () {
+       git rev-parse --is-bare-repository
 }
 
 cd_to_toplevel () {
-       cdup=$(git-rev-parse --show-cdup)
+       cdup=$(git rev-parse --show-cdup)
        if test ! -z "$cdup"
        then
                cd "$cdup" || {
@@ -48,10 +60,37 @@ cd_to_toplevel () {
 }
 
 require_work_tree () {
-       test $(is_bare_repository) = false ||
+       test $(git rev-parse --is-inside-work-tree) = true ||
        die "fatal: $0 cannot be used without a working tree."
 }
 
+get_author_ident_from_commit () {
+       pick_author_script='
+       /^author /{
+               s/'\''/'\''\\'\'\''/g
+               h
+               s/^author \([^<]*\) <[^>]*> .*$/\1/
+               s/'\''/'\''\'\'\''/g
+               s/.*/GIT_AUTHOR_NAME='\''&'\''/p
+
+               g
+               s/^author [^<]* <\([^>]*\)> .*$/\1/
+               s/'\''/'\''\'\'\''/g
+               s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
+
+               g
+               s/^author [^<]* <[^>]*> \(.*\)$/\1/
+               s/'\''/'\''\'\'\''/g
+               s/.*/GIT_AUTHOR_DATE='\''&'\''/p
+
+               q
+       }
+       '
+       encoding=$(git config i18n.commitencoding || echo UTF-8)
+       git show -s --pretty=raw --encoding="$encoding" "$1" |
+       LANG=C LC_ALL=C sed -ne "$pick_author_script"
+}
+
 if [ -z "$LONG_USAGE" ]
 then
        LONG_USAGE="Usage: $0 $USAGE"
@@ -71,12 +110,22 @@ esac
 if [ -z "$SUBDIRECTORY_OK" ]
 then
        : ${GIT_DIR=.git}
-       GIT_DIR=$(GIT_DIR="$GIT_DIR" git-rev-parse --git-dir) || {
+       GIT_DIR=$(GIT_DIR="$GIT_DIR" git rev-parse --git-dir) || {
                exit=$?
                echo >&2 "You need to run this command from the toplevel of the working tree."
                exit $exit
        }
 else
-       GIT_DIR=$(git-rev-parse --git-dir) || exit
+       GIT_DIR=$(git rev-parse --git-dir) || {
+           exit=$?
+           echo >&2 "Failed to find a valid git directory."
+           exit $exit
+       }
 fi
+
+test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
+    echo >&2 "Unable to determine absolute path of git directory"
+    exit 1
+}
+
 : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}