Handle spaces in dotfile name

In mkrc, separate the list of files with newlines instead of spaces.
Change the `$IFS` when iterating to handle this.

We hand the file off to rcup, which encodes the file name by replacing
spaces with the bell character (`\a`).

rcup then sends the file name off to lsrc, which decodes the bell back
into a space.

The test makes sure an `a` character is in the filename, in case some
encoding goes wrong. We use tr(1) instead of sed(1) because tr(1)
handles `\a`.

Shoutout to Sublime Text 3 for forcing this issue.

3 files changed, 18 insertions, 5 deletions

diff --git a/bin/lsrc.in b/bin/lsrc.in
index 8fb1fcd..b0dc30a 100755
--- a/bin/lsrc.in
+++ b/bin/lsrc.in
@@ -347,7 +347,8 @@ for DOTFILES_DIR in $DOTFILES_DIRS; do
   host_files="$DOTFILES_DIR/host-$HOSTNAME"
   if [ -d "$host_files" ]; then
     pushdir "$(basename "$host_files")"
-    for file in ${FILES:-*}; do
+    for escaped_file in ${FILES:-*}; do
+      file="$(decode "$escaped_file")"
       dotted=0
       if is_excluded "$file" "$undotted_file_globs" "$never_undotted_file_globs"; then
         dotted=1
@@ -363,7 +364,8 @@ for DOTFILES_DIR in $DOTFILES_DIRS; do
   for tag in $TAGS; do
     if [ -d "tag-$tag" ]; then
       pushdir "$(basename "tag-$tag")"
-      for file in ${FILES:-*}; do
+      for escaped_file in ${FILES:-*}; do
+        file="$(decode "$escaped_file")"
         $DEBUG "TAG: $tag, exclude_file_globs: $exclude_file_globs"
         dotted=0
         if is_excluded "$file" "$undotted_file_globs" "$never_undotted_file_globs"; then
@@ -377,7 +379,8 @@ for DOTFILES_DIR in $DOTFILES_DIRS; do
 
   cd "$DOTFILES_DIR"
 
-  for file in ${FILES:-*}; do
+  for escaped_file in ${FILES:-*}; do
+    file="$(decode "$escaped_file")"
     dotted=0
     if is_metafile "$file"; then
       continue
diff --git a/bin/mkrc.in b/bin/mkrc.in
index da22a63..5b2dea5 100755
--- a/bin/mkrc.in
+++ b/bin/mkrc.in
@@ -82,7 +82,10 @@ if [ $always_copy -eq 1 ]; then
   INSTALL="$INSTALL -C"
 fi
 
-files=$@
+files=""
+for i; do
+  files="$(printf "$files\n$i")"
+done
 
 if [ $force_symlink -eq 1 ]; then
   for file in $files; do
@@ -108,7 +111,11 @@ elif [ $undotted -eq 0 ]; then
   done
 fi
 
+saved_IFS="$IFS"
+IFS='
+'
 for file in $files; do
+  IFS="$saved_IFS"
   case "$file" in
     /*) : ;;
     *) [ -e "$PWD/$file" ] && file="$PWD/$file" ;;
diff --git a/bin/rcup.in b/bin/rcup.in
index de11751..932ac56 100755
--- a/bin/rcup.in
+++ b/bin/rcup.in
@@ -260,7 +260,10 @@ handle_command_line() {
   tags="${arg_tags:-$TAGS}"
   DOTFILES_DIRS="${dotfiles_dirs:-$DOTFILES_DIRS}"
   RUN_HOOKS=$run_hooks
-  files="$@"
+  files=
+  for file; do
+    files="$files $(encode "$file")"
+  done
 
   for tag in $tags; do
     LS_ARGS="$LS_ARGS -t $tag"