Hide duplicates

With multiple source directories it is possible to have duplicates.
Consider these source directories, `a` and `b`:

    |-- a
    |   |-- bar
    |   `-- foo
    `-- b
        |-- baz
        `-- foo

The goal is to have this:

    .bar -> a/bar
    .baz -> b/baz
    .foo -> a/foo

Note the duplcate `foo` file.

We now handle this, in `lsrc` and therefore in `rcup`. We do this by
storing a `:`-separated string of destination files (e.g. `.foo`) and
`grep`ing that string before we operate on any destination.

1 files changed, 7 insertions, 1 deletions

diff --git a/bin/lsrc b/bin/lsrc
index e2a3618..cdebfeb 100755
--- a/bin/lsrc
+++ b/bin/lsrc
@@ -58,7 +58,11 @@ link_file() {
   local dotted=$4
   local dest_file=`build_path $dest_dir $file $dotted`
 
-  $PRINT $dest_file:$dotfiles_dir/$file
+  if echo $DEST_STACK | grep -vq ":$dest_file"; then
+    DEST_STACK="$DEST_STACK:$dest_file"
+
+    $PRINT $dest_file:$dotfiles_dir/$file
+  fi
 }
 
 handle_file() {
@@ -131,6 +135,8 @@ handle_command_line() {
   FILES=$@
 }
 
+DEST_STACK=
+
 if [ -e $HOME/.rcrc ]; then
   . $HOME/.rcrc
 fi