Add support for building different components of the library

compile

@@ -1,6 +1,17 @@
 #!/bin/bash
 
 BUILD_TYPE="debug"
+COMPONENTS="all"
+
+function join_array {
+  DELIM="$1"
+  shift
+  local IFS="$DELIM"
+  echo "$*"
+}
+
+SUPPORTED_COMPONENTS=("all" "testing" "os" "core")
+COMPONENTS_STRING="$(join_array "|" ${SUPPORTED_COMPONENTS[@]})"
 
 while [[ $# > 0 ]];do
   case $1 in
@@ -8,8 +19,14 @@ while [[ $# > 0 ]];do
       BUILD_TYPE="release"
       shift
       ;;
+    --components)
+      COMPONENTS="$2"
+      shift
+      shift
+      ;;
     *|-*|--*)
       echo "Unknown option $1"
+      echo "Usage: $0 [--release] [--components $COMPONENTS_STRING (Default: all)]"
       exit 1
       ;;
   esac
@@ -25,7 +42,26 @@ if [[ $CC == "gcc" ]]; then
 fi
 
 INCLUDE="$(find src -type d | xargs -I{} echo -n "-I{} ")"
-SRC="$(find src -type f -name "*.c" | xargs -I{} echo -n "{} ")"
+
+case $COMPONENTS in
+  all)
+    SRC="src/wapp.c"
+    ;;
+  testing)
+    SRC="src/testing/wapp_testing.c"
+    ;;
+  os)
+    SRC="src/os/wapp_os.c"
+    ;;
+  core)
+    SRC="src/core/wapp_core.c"
+    ;;
+  *)
+    echo "Unrecognised option for components: $COMPONENTS"
+    echo "Accepted options: $COMPONENTS_STRING"
+    exit 2
+    ;;
+esac
 
 TEST_INCLUDE="$(find tests -type d | xargs -I{} echo -n "-I{} ")"
 TEST_SRC="$(find tests -type f -name "*.c" | xargs -I{} echo -n "{} ")"