Merge branch 'feature--overlay_functions'

diff --combined vcsh
index a12bc4962f9f8b31cc14b03fe3739d9213e4606f,301151a1d6d83ca10e678957300819ff50de5c3d..53ce905c3a7c62abfbbfcb71e89c38b3b143bc1b
--- 1/vcsh
--- 2/vcsh
+++ b/vcsh
@@@ -24,7 -24,6 +24,7 @@@ SELF=$(basename $0
  
  fatal() {
        echo "$SELF: fatal: $1" >&2
 +      [ -z $2] && exit 1
        exit $2
  }
  
@@@ -76,6 -75,7 +76,7 @@@ f
  # Read defaults
  : ${VCSH_REPO_D:="$XDG_CONFIG_HOME/vcsh/repo.d"}
  : ${VCSH_HOOK_D:="$XDG_CONFIG_HOME/vcsh/hooks-enabled"}
+ : ${VCSH_OVERLAY_D:="$XDG_CONFIG_HOME/vcsh/overlays-enabled"}
  : ${VCSH_BASE:="$HOME"}
  : ${VCSH_GITIGNORE:=exact}
  : ${VCSH_GITATTRIBUTES:=none}
@@@ -149,10 -149,9 +150,10 @@@ clone() 
        git remote add origin "$GIT_REMOTE"
        git config branch.master.remote origin
        git config branch.master.merge  refs/heads/master
 -      if [ $(git ls-remote origin master 2> /dev/null | wc -l ) -lt 1 ]; then
 -              info "remote is empty, not merging anything"
 -              exit
 +      VCSH_CLONE_ERROR=$(git ls-remote origin master 2>&1)
 +      if [ -n "$VCSH_CLONE_ERROR" ]; then
 +              rm -rf "$GIT_DIR"
 +              fatal "$VCSH_CLONE_ERROR" 1
        fi
        git fetch
        hook pre-merge
@@@ -513,6 -512,14 +514,14 @@@ check_dir "$VCSH_REPO_D
  
  verbose "$VCSH_COMMAND begin"
  VCSH_COMMAND=$(echo "$VCSH_COMMAND" | sed 's/-/_/g'); export VCSH_COMMAND
+ 
+ # source overlay functions
+ for overlay in "$VCSH_OVERLAY_D/$VCSH_COMMAND"* "$VCSH_OVERLAY_D/$VCSH_REPO_NAME.$VCSH_COMMAND"*; do
+       [ -r "$overlay" ] || continue
+       info "sourcing '$overlay'"
+       . "$overlay"
+ done
+ 
  hook pre-command
  $VCSH_COMMAND "$@"
  hook post-command