cleaned up

src/sh/awk.sh

@@ -1,27 +1,31 @@
-AWK_ARTISTS=$(
-  cat <<'EOF'
+if [ ! "${AWK_LOADED:-}" ]; then
+  AWK_ARTISTS=$(
+    cat <<'EOF'
 @@include awk/artists.awk
 EOF
-)
-export AWK_ARTISTS
+  )
+  export AWK_ARTISTS
 
-AWK_RELEASES=$(
-  cat <<'EOF'
+  AWK_RELEASES=$(
+    cat <<'EOF'
 @@include awk/releases.awk
 EOF
-)
-export AWK_RELEASES
+  )
+  export AWK_RELEASES
 
-AWK_RELEASEGROUPS=$(
-  cat <<'EOF'
+  AWK_RELEASEGROUPS=$(
+    cat <<'EOF'
 @@include awk/releasegroups.awk
 EOF
-)
-export AWK_RELEASEGROUPS
+  )
+  export AWK_RELEASEGROUPS
 
-AWK_RECORDINGS=$(
-  cat <<'EOF'
+  AWK_RECORDINGS=$(
+    cat <<'EOF'
 @@include awk/recordings.awk
 EOF
-)
-export AWK_RECORDINGS
+  )
+  export AWK_RECORDINGS
+
+  export AWK_LOADED=1
+fi