intro: 4-ipfs-code-execution (#15)

intro/4-ipfs-code-execution/service/.gitignore

@@ -0,0 +1,4 @@
+debug/
+target/
+**/*.bk
+**/*.bak

intro/4-ipfs-code-execution/service/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "process_files"
+version = "0.1.0"
+authors = ["Fluence Labs"]
+edition = "2018"
+description = "Marine service that processes files in various ways"
+license = "Apache-2.0"
+
+[[bin]]
+name = "process_files"
+path = "src/main.rs"
+
+[dependencies]
+marine-rs-sdk = { version="0.6.11", features=["logger"] }
+log = "0.4.14"
+
+[dev-dependencies]
+marine-rs-sdk-test = "0.1.11"
+
+[profile.release]
+opt-level = "s"

intro/4-ipfs-code-execution/service/Config.toml

@@ -0,0 +1,6 @@
+modules_dir = "artifacts/"
+
+[[module]]
+    name = "process_files"
+    mem_pages_count = 1
+    logger_enabled = true

intro/4-ipfs-code-execution/service/scripts/build.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash -o errexit -o nounset -o pipefail
+cargo update --aggressive
+
+mkdir -p artifacts
+rm -f artifacts/*.wasm
+marine build --release
+cp target/wasm32-wasi/release/process_files.wasm artifacts/
+marine aqua artifacts/process_files.wasm >../aqua/process_files.aqua

intro/4-ipfs-code-execution/service/src/main.rs

@@ -0,0 +1,37 @@
+/*
+ * Copyright 2021 Fluence Labs Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+use marine_rs_sdk::{marine, module_manifest};
+
+module_manifest!();
+
+pub fn main() { }
+
+#[marine]
+pub struct SizeResult {
+    pub size: u32,
+    pub success: bool,
+    pub error: String,
+}
+
+#[marine]
+pub fn file_size(file_path: String) -> SizeResult {
+    match std::fs::read(file_path) {
+        Ok(bytes) => SizeResult { size: bytes.len() as _, success: true, error: String::new() },
+        Err(err) => SizeResult { size: 0, success: false, error: err.to_string() },
+    }
+}
+