zshrc: Improve robustness of the bzr backend in vcs_info()

I just played a little with bzr; calling 'bzr' itself in the prompt is
painfully slow. And we do it *twice* for the base directory and the
branchname/revision-number.

I don't know enough about bzr, to change this.
Personally, I would replace the branch-root, by the base directory, that
VCS_INFO_detect_by_dir().

The branch name *could* be replaced by ${bzrbase:t}, but since it is
retrieved from the same command as the revision-number, so that will not
save us a call to 'bzr'...

Hints on this one are highly appreciated. Like this, the bzr backend
is just too slow to use (for me on my laptop at 1.5GHz).

diff --git a/etc/zsh/zshrc b/etc/zsh/zshrc
index 23f653b..c3535f2 100644 (file)
--- a/etc/zsh/zshrc
+++ b/etc/zsh/zshrc
@@ -1284,12 +1284,10 @@ VCS_INFO_svn_get_data () { # {{{
 VCS_INFO_bzr_get_data () { # {{{
     local msg bzrbranch bzrbase bzrrevno i j
 
-    bzrbase=$(bzr info | sed -rne 's, *branch root: ,,p')
-    case ${bzrbase} in
-        .) bzrbase=${PWD} ;;
-    esac
+    bzrbase=$(bzr info 2>/dev/null | sed -rne 's, *branch root: ,,p')
+    bzrbase=$(VCS_INFO_realpath ${bzrbase})
 
-    bzr version-info | while read i j; do
+    bzr version-info 2> /dev/null | while read i j; do
         case "${i}" in
             revno:)
                 bzrrevno=${j} ;;
@@ -1330,6 +1328,7 @@ VCS_INFO_detect_by_dir() {
 
 VCS_INFO_bzr_detect() {
     check_com -c bzr || return 1
+    vcs_comm[detect_need_file]=branch/format
     VCS_INFO_detect_by_dir '.bzr'
     return $?
 }