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, 4 insertions, 1 deletions

diff --git a/bin/lsrc.in b/bin/lsrc.in
index c5ad700..760d769 100755
--- a/bin/lsrc.in
+++ b/bin/lsrc.in
@@ -227,8 +227,9 @@ handle_command_line() {
   local excludes=
   local includes=
   local symlink_dirs=
+  local hostname=
 
-  while getopts FVqvhI:x:S:t:d: opt; do
+  while getopts FVqvhI:x:B:S:t:d: opt; do
     case "$opt" in
       F) show_sigils=1;;
       h) show_help ;;
@@ -240,11 +241,13 @@ handle_command_line() {
       V) version=1;;
       x) excludes="$excludes $OPTARG";;
       S) symlink_dirs="$symlink_dirs $OPTARG";;
+      B) hostname="$OPTARG";;
     esac
   done
   shift $(($OPTIND-1))
 
   handle_common_flags lsrc $version $verbosity
+  HOSTNAME="$(determine_hostname "$hostname")"
   SHOW_SIGILS=$show_sigils
   TAGS="${arg_tags:-$TAGS}"
   DOTFILES_DIRS="${dotfiles_dirs:-$DOTFILES_DIRS}"