Add a hostname override

Based on issue #82, we now provide `-B` to override the hostname. In
particular:

- `mkrc -B foo` will enable `-o` but with the hostname set up `foo`.
- `lsrc -B foo` will work like normal `lsrc` except it treats `host-foo`
as the host-specific directory.
- `rcup -B foo` will run a normal `rcup` except `host-foo` is the
host-specific directory.
- `rcdn -B foo` is just like normal `rcdn`, but with `host-foo` as the
  host-specific directory.

The `HOSTNAME` can also be set in the rcrc(5), and this is overridden by
the aforementioned `-B`.

While making this change: The `test/Makefile.am` used a mix of tabs and
spaces. Since it's a Makefile, replace it all with tabs.

1 files changed, 5 insertions, 2 deletions

diff --git a/bin/rcdn.in b/bin/rcdn.in
index 2ca6dae..e633f3e 100755
--- a/bin/rcdn.in
+++ b/bin/rcdn.in
@@ -37,10 +37,12 @@ handle_command_line() {
   local excludes=
   local includes=
   local symlink_dirs=
+  local hostname=
 
-  while getopts VqvhI:x:S:t:d: opt; do
+  while getopts VqvhI:x:S:t:d:B: opt; do
     case "$opt" in
       h) show_help ;;
+      B) hostname="$OPTARG" ;;
       I) includes="$includes $OPTARG";;
       k) run_hooks=1 ;;
       K) run_hooks=0 ;;
@@ -56,6 +58,7 @@ handle_command_line() {
   shift $(($OPTIND-1))
 
   handle_common_flags rcup $version $verbosity
+  hostname="$(determine_hostname "$hostname")"
 
   tags="${arg_tags:-$TAGS}"
   dotfiles_dirs="${dotfiles_dirs:-$DOTFILES_DIRS}"
@@ -77,7 +80,7 @@ handle_command_line() {
   for symlink_dir in $symlink_dirs; do
     LS_ARGS="$LS_ARGS -S $symlink_dir"
   done
-  LS_ARGS="$LS_ARGS $files"
+  LS_ARGS="$LS_ARGS -B $hostname $files"
 
   $DEBUG "LS_ARGS: $LS_ARGS"
 }