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, 9 insertions, 9 deletions

diff --git a/share/rcm.sh.in b/share/rcm.sh.in
index 809fca3..2ce68d4 100644
--- a/share/rcm.sh.in
+++ b/share/rcm.sh.in
@@ -12,7 +12,6 @@ DEFAULT_DOTFILES_DIR="$HOME/.dotfiles"
 MKDIR=mkdir
 INSTALL=rcup
 ROOT_DIR="$HOME"
-HOSTNAME="$(hostname | sed -e 's/\..*//')"
 
 ln_v() {
   $VERBOSE "'$1' -> '$2'"
@@ -96,15 +95,16 @@ handle_common_flags() {
   fi
 }
 
-handle_metadata_flags() {
-  local arg_tags="$1"
-  local dotfiles_dirs="$2"
+determine_hostname() {
+  local name="$1"
 
-  : ${TAGS:=$arg_tags}
-  : ${DOTFILES_DIRS:=$dotfiles_dirs}
-
-  $DEBUG "TAGS: $TAGS"
-  $DEBUG "DOTFILES_DIRS: $DOTFILES_DIRS"
+  if [ -n "$name" ]; then
+    echo "$name"
+  elif [ -n "$HOSTNAME" ]; then
+    echo "$HOSTNAME"
+  else
+    echo "$(hostname | sed -e 's/\..*//')"
+  fi
 }
 
 run_hooks() {