build bash completion improved.

.profile.roku

@@ -22,22 +22,42 @@ target:
 EOF
 }
 
+completion_contains()
+{
+    # Platforms
+    for WORD in "$@"; do
+        if [[ "${COMP_WORDS[*]}" =~ "$WORD" ]]; then
+            return 1
+        fi
+    done
+    return 0
+}
+
+completion_add_if()
+{
+    completion_contains "$@"
+    if [[ $? == 0 ]]; then
+        CANDIDATES+=" $@"
+    fi
+}
+
 complete -F build_completion build
 build_completion()
 {
-    local CANDIDATES="help clobber tests addon-checksums icecc docker make"
+    local CANDIDATES="help clobber tests addon-checksums"
+
+    # Docker
+    completion_add_if docker make
+
+    # Build hosts
+    completion_add_if icecc local
 
     # Platforms
-    local PLATFORMS="native marlin bailey loggan"
-    if ! [[ "${COMP_WORDS[*]}" =~ "marlin" ||
-            "${COMP_WORDS[*]}" =~ "bailey" ||
-            "${COMP_WORDS[*]}" =~ "loggan"  ||
-            "${COMP_WORDS[*]}" =~ "native" ]]; then
-        CANDIDATES+=" $PLATFORMS"
-    fi
+    completion_add_if native marlin bailey loggan
 
     COMPREPLY=($(compgen -W "$CANDIDATES" "${COMP_WORDS[${COMP_CWORD}]}"))
 }
+
 build()
 {
     local BUILD_PLATFORM=marlin