Account for empty but existing db file.

scripts/alias

@@ -161,17 +161,14 @@ alias_create() {
 }
 
 alias_list() {
-
   local item items
 
   items=($(cd "$rvm_rubies_path" ; find . -maxdepth 1 -mindepth 1 -type l | sed -e 's#./##'))
 
-  for item in "${items[@]}" ; do
-
+  for item in "${items[@]}"
+  do
     echo "$(basename "$item") => $("$rvm_scripts_path"/db "$rvm_config_path/alias" "$(basename "$item")")"
-
   done
-
 }
 
 args=($*)

scripts/db

@@ -13,83 +13,67 @@ usage()
 " >&2
 }
 
-if [[ -f "$1" ]] ; then
-
-  database_file="$1" ; shift
-
-  if [[ ! -f "$database_file" ]] ; then
-
+if [[ -f "$1" ]]
+then
+  database_file="$1"
+  shift
+  if [[ ! -f "$database_file" ]]
+  then
     directory=$(dirname "$database_file")
 
-    if [[ ! -d "$directory" ]] ; then
-      mkdir -p "$directory"
-    fi
+    [[ -d "$directory" ]] || mkdir -p "$directory"
 
     touch "$database_file"
-
   fi
-
 else
-
   printf "\n\nDatabase file $1 does not exist.\n\n" >&2
-
   exit 1
-
 fi
 
-key="$1" ; shift
-
-if [[ -z "$key" ]] ; then
+key="$1"
+shift
 
+if [[ -z "$key" ]]
+then
   usage
-
   exit 1
-
 else
-
-  if [[ ${escape_flag:-0} -eq 1 ]]; then
+  if (( ${escape_flag:-0} ))
+  then
     escaped_key="$(\printf "$key" | \sed -e 's#\\#\\#g' -e 's#/#\\/#g' -e 's#\.#\.#g')"
   else
     escaped_key="$key"
   fi
 
   value="$*"
 
-  if [[ "unset" = "$value" || "delete" = "$value" ]] ; then
-
+  if [[ "unset" = "$value" || "delete" = "$value" ]]
+  then
     \sed -e "s#^$escaped_key=.*\$##"  -e '/^$/d' "$database_file" \
       > "$database_file.new"
 
     mv "$database_file.new" "$database_file"
-
   else
-
-    if [[ -z "$value" ]] ; then # get
+    if [[ -z "$value" ]]
+    then # get
+      [[ -s "${database_file}" ]] || exit 0 # File is empty, nothing to get.
 
       \awk -F= '/^'"$escaped_key"'=/' "$database_file" \
         | \sed -e "s#^$escaped_key=##" -e '/^$/d'
-
     else # set
-
       \sed -e "s#^$escaped_key=.*\$##" -e '/^$/d' "$database_file" > "$database_file.new"
 
       mv "$database_file.new" "$database_file"
 
-      if [[ -z "$(awk -F= "/^'"$escaped_key"'=/{print $2}" "$database_file")" ]] ; then # append
-
+      if [[ -z "$(awk -F= "/^'"$escaped_key"'=/{print $2}" "$database_file")" ]]
+      then # append
         echo "$escaped_key=$value" >> "$database_file"
-
       else # overwrite
-
         \sed -i.tmp "s#^$escaped_key=.*\$#$escaped_key=$value#" "$database_file" > "$database_file.new"
 
         mv "$database_file.new" "$database_file"
-
       fi
-
     fi
-
   fi
-
 fi