Pre-up, post-up, pre-down, and post-down hooks

These are programs that, if they exist, will run before or after the
syncronization/removal is run. Three use cases caused this:

1. The thoughtbot dotfiles will run a vundle installation set of
commands after intitial synchronization.

2. I changed the location of `.bash_history` to `.bash/history` and
wanted to move `.bash_history` to `.bash/history` after up to preserve
existing history.

3. Moving from an existing old-style custom install script to `rcup`
might require some cleanup; this happened in practice, and required a
simple script.

1 files changed, 7 insertions, 2 deletions

diff --git a/bin/rcup b/bin/rcup
index 5f51192..5a42a81 100755
--- a/bin/rcup
+++ b/bin/rcup
@@ -119,13 +119,13 @@ handle_command_line() {
   handle_common_flags rcup $version $verbosity
 
   tags=${arg_tags:-$TAGS}
-  dotfiles_dirs=${dotfiles_dirs:-$DOTFILES_DIRS}
+  DOTFILES_DIRS=${dotfiles_dirs:-$DOTFILES_DIRS}
   files=$@
 
   for tag in $tags; do
     LS_ARGS="$LS_ARGS -t $tag"
   done
-  for dotfiles_dir in $dotfiles_dirs; do
+  for dotfiles_dir in $DOTFILES_DIRS; do
     LS_ARGS="$LS_ARGS -d $dotfiles_dir"
   done
   for exclude in $excludes; do
@@ -146,6 +146,9 @@ if [ -e $HOME/.rcrc ]; then
 fi
 
 handle_command_line $*
+: ${DOTFILES_DIRS:=$DOTFILES_DIRS $DEFAULT_DOTFILES_DIR}
+
+run_hooks pre up
 
 for dest_and_src in `lsrc $LS_ARGS`; do
   saved_ifs=$IFS
@@ -162,3 +165,5 @@ for dest_and_src in `lsrc $LS_ARGS`; do
 
   handle_file $src $dest $sigil
 done
+
+run_hooks post up