Merge branch 'ar/progress'

[git.git] / git-checkout.sh

diff --git a/git-checkout.sh b/git-checkout.sh
index 39ffa8b8a3322b623a6d4938d566453fe206ca69..6b6facfd5a224afca735d4693d304726f4032e6f 100755 (executable)
--- a/git-checkout.sh
+++ b/git-checkout.sh
@@ -17,6 +17,7 @@ newbranch=
 newbranch_log=
 merge=
 quiet=
+v=-v
 LF='
 '
 while [ "$#" != "0" ]; do
@@ -47,6 +48,7 @@ while [ "$#" != "0" ]; do
                ;;
        "-q")
                quiet=1
+               v=
                ;;
        --)
                break
@@ -163,7 +165,14 @@ cd_to_toplevel
 detached=
 detach_warn=
 
-if test -z "$branch$newbranch" && test "$new" != "$old"
+describe_detached_head () {
+       test -n "$quiet" || {
+               printf >&2 "$1 "
+               GIT_PAGER= git log >&2 -1 --pretty=oneline --abbrev-commit "$2"
+       }
+}
+
+if test -z "$branch$newbranch" && test "$new_name" != "$old_name"
 then
        detached="$new"
        if test -n "$oldbranch" && test -z "$quiet"
@@ -173,9 +182,9 @@ If you want to create a new branch from this checkout, you may do so
 (now or later) by using -b with the checkout command again. Example:
   git checkout -b <new_branch_name>"
        fi
-elif test -z "$oldbranch" && test -z "$quiet"
+elif test -z "$oldbranch" && test "$new" != "$old"
 then
-       echo >&2 "Previous HEAD position was $old"
+       describe_detached_head 'Previous HEAD position was' "$old"
 fi
 
 if [ "X$old" = X ]
@@ -190,7 +199,7 @@ fi
 
 if [ "$force" ]
 then
-    git-read-tree --reset -u $new
+    git-read-tree $v --reset -u $new
 else
     git-update-index --refresh >/dev/null
     merge_error=$(git-read-tree -m -u --exclude-per-directory=.gitignore $old $new 2>&1) || (
@@ -203,7 +212,7 @@ else
        # Match the index to the working tree, and do a three-way.
        git diff-files --name-only | git update-index --remove --stdin &&
        work=`git write-tree` &&
-       git read-tree --reset -u $new || exit
+       git read-tree $v --reset -u $new || exit
 
        eval GITHEAD_$new='${new_name:-${branch:-$new}}' &&
        eval GITHEAD_$work=local &&
@@ -214,7 +223,7 @@ else
        # this is not a real merge before committing, but just carrying
        # the working tree changes along.
        unmerged=`git ls-files -u`
-       git read-tree --reset $new
+       git read-tree $v --reset $new
        case "$unmerged" in
        '')     ;;
        *)
@@ -250,26 +259,24 @@ if [ "$?" -eq 0 ]; then
        if test -n "$branch"
        then
                GIT_DIR="$GIT_DIR" git-symbolic-ref -m "checkout: moving to $branch" HEAD "refs/heads/$branch"
-               if test -z "$quiet"
+               if test -n "$quiet"
+               then
+                       true    # nothing
+               elif test "refs/heads/$branch" = "$oldbranch"
                then
+                       echo >&2 "Already on branch \"$branch\""
+               else
                        echo >&2 "Switched to${newbranch:+ a new} branch \"$branch\""
                fi
        elif test -n "$detached"
        then
-               # NEEDSWORK: we would want a command to detach the HEAD
-               # atomically, instead of this handcrafted command sequence.
-               # Perhaps:
-               #       git update-ref --detach HEAD $new
-               # or something like that...
-               #
-               git-rev-parse HEAD >"$GIT_DIR/HEAD.new" &&
-               mv "$GIT_DIR/HEAD.new" "$GIT_DIR/HEAD" &&
-               git-update-ref -m "checkout: moving to $arg" HEAD "$detached" ||
+               git-update-ref --no-deref -m "checkout: moving to $arg" HEAD "$detached" ||
                        die "Cannot detach HEAD"
                if test -n "$detach_warn"
                then
                        echo >&2 "$detach_warn"
                fi
+               describe_detached_head 'HEAD is now at' HEAD
        fi
        rm -f "$GIT_DIR/MERGE_HEAD"
 else