improve build scripts

Dockerfile

@@ -4,9 +4,11 @@ RUN apt-get update \
  && apt-get install -y ca-certificates \
                        curl \
                        git \
-                       make
+                       make \
+                       cargo
 
 RUN curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-10/wasi-sdk-10.0-linux.tar.gz | tar xz --strip-components=1 -C /
+RUN cargo install fcli
 
 VOLUME /code
 WORKDIR /code

Makefile

@@ -7,6 +7,7 @@ default: all
 
 wasm:
 	cd src && $(MAKE) -f Makefile_wasm && mv redis.wasm ../
+	~/.cargo/bin/fce embed -i redis.wasm -o redis.wasm -w redis.wit
 
 install:
 	cd src && $(MAKE) $@

redis.wit

@@ -0,0 +1,44 @@
+;; Fluence Redis fork Wasm Interface Types
+
+;; allocate
+(@interface type (func (param i32) (result i32)))       ;; 0
+
+;; deallocate
+(@interface type (func (param i32 i32)))                ;; 1
+
+;; invoke
+(@interface type (func (param string) (result string))) ;; 2
+
+;; get_result_ptr/get_result_size
+(@interface type (func (result i32)))                   ;; 3
+
+;; set_result_ptr/set_result_size
+(@interface type (func (param i32)))                    ;; 4
+
+
+(@interface export "allocate" (func  0))               ;; 0
+(@interface export "deallocate" (func 1))              ;; 1
+(@interface export "invoke" (func 2))                  ;; 2
+(@interface export "get_result_size" (func 3))         ;; 3
+(@interface export "get_result_ptr" (func 3))          ;; 4
+(@interface export "set_result_size" (func 4))         ;; 5
+(@interface export "set_result_ptr" (func 4))          ;; 6
+
+;; adapter for export invoke function
+(@interface func (type 2)
+    arg.get 0
+    string.size
+    call-core 0             ;; call allocate
+    arg.get 0
+    string.lower_memory
+    call-core 2             ;; call invoke
+    call-core 4             ;; call get_result_size
+    call-core 3             ;; call get_result_ptr
+    string.lift_memory
+    call-core 4             ;; call get_result_size
+    call-core 3             ;; call get_result_ptr
+    call-core 1             ;; call deallocate
+)
+
+;; Implementations
+(@interface implement (func 2) (func 2))