Init option for cargo-sewup (#201)

* Implement init sub command for sewup cli

README.md

@@ -34,93 +34,7 @@ please checkout `#[ewasm_main(auto)]` and `EwasmAny` or the example of rdb featu
 how to write a flexible smart contract with ewasm.
 
 ### Develop
-Following is the minimal setting to initial a sewup project.
-```toml
-# Cargo.toml
-[package]
-name = "hello-contract"
-
-[lib]
-path = "src/lib.rs"
-crate-type = ["cdylib"]
-
-[dependencies]
-sewup = { version = "*", features = ['kv'] }
-sewup-derive = { version = "*", features = ['kv']  }
-
-anyhow = "1.0"
-
-[profile.release]
-incremental = false
-panic = "abort"
-lto = true
-opt-level = "z"
-
-[profile.release.package.hello-contract]  # package name
-incremental = false
-opt-level = "z"
-
-# Following features helps are used when building or testing a contract
-[features]
-constructor = []  # required
-constructor-test = [] # required
-```
-
-```toml
-# sewup.toml
-
-# Following section including the parameters to deploy the contract
-[deploy]
-url = "http://localhost:8545"  # url for rpc node
-private = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"  # private key
-address = "0xXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"  # account address
-# gas = 5000000 # optional
-# gas_price = 1 # optional
-
-```
-Place [.cargo/config](./examples/hello-contract/.cargo/config) file in your project to specify the flags for build.
-
-Here is minimize example for writing a contract with sewup
-```rust
-// lib.rs
-use anyhow::Result;
-
-use sewup::primitives::Contract;
-use sewup_derive::{ewasm_constructor, ewasm_fn, ewasm_fn_sig, ewasm_main, ewasm_test};
-
-#[ewasm_constructor]
-fn constructor() {
-  // do something you want when the contract deploy on chain
-}
-
-#[ewasm_fn]
-fn hello() -> Result<String> {
-    let target = "world";
-    let greeting = "hello ".to_string() + sewup::ewasm_dbg!(target);
-    Ok(greeting)
-}
-
-#[ewasm_main(auto)]
-fn main() -> Result<String> {
-    let contract = Contract::new()?;
-    let greeting = match contract.get_function_selector()? {
-        ewasm_fn_sig!(hello) => hello()?,
-        _ => panic!("unknown handle"),
-    };
-    Ok(greeting)
-}
-
-#[ewasm_test]
-mod tests {
-    use super::*;
-    use sewup_derive::ewasm_auto_assert_eq;
-
-    #[ewasm_test]
-    fn test_get_greeting() {
-        ewasm_auto_assert_eq!(hello(), "hello world".to_string());
-    }
-}
-```
+It is easy to setup your sewup project with `cargo-sewup init`, and you can learn more about the project configure with the [Deploy Guide](https://github.com/second-state/SewUp/wiki/Develop-Guide) wiki page.
 
 ### Interact
 There are so many clients can interact with contract.

cargo-sewup/src/init.rs

@@ -0,0 +1,135 @@
+use std::path::Path;
+
+use anyhow::{Context, Result};
+use tokio::fs::{create_dir, write};
+
+async fn init_gitignore() -> Result<()> {
+    write(".gitignore", b"/target\n/sewup.toml")
+        .await
+        .context("failed to init .gitignore")?;
+    Ok(())
+}
+
+async fn init_sewup_config() -> Result<()> {
+    write(
+        "sewup.toml",
+        r#"
+[deploy]
+url = "http://localhost:8545"
+private = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+address = "0xXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
+gas = 5000000
+gas_price = 1"#,
+    )
+    .await
+    .context("failed to init sewup.toml")?;
+    Ok(())
+}
+async fn init_cargo_config() -> Result<()> {
+    create_dir(Path::new("./cargo")).await?;
+    write(
+        "./.cargo/config.rs",
+        r#"
+[target.'cfg(target_arch="wasm32")']
+rustflags = ["-C", "link-arg=--export-table"]"#,
+    )
+    .await?;
+    Ok(())
+}
+
+async fn init_cargo_toml() -> Result<()> {
+    let current_folder = std::env::current_dir()?;
+    let project_name = current_folder.file_name().unwrap().to_string_lossy();
+
+    write(
+        "Cargo.toml",
+        format!(
+            r#"
+[package]
+name = "{}"
+version = "0.1.0"
+edition = "2018"
+
+[lib]
+path = "src/lib.rs"
+crate-type = ["cdylib"]
+
+# See the hello example if you want to use a rust client
+# https://github.com/second-state/SewUp/tree/main/examples/hello-contract
+
+[dependencies]
+sewup = "*"
+sewup-derive = "*"
+anyhow = "*"
+
+[profile.release]
+incremental = false
+panic = "abort"
+lto = true
+opt-level = "z"
+
+[profile.release.package.{}]
+incremental = false
+opt-level = "z"
+
+[features]
+constructor = []
+constructor-test = []"#,
+            project_name, project_name
+        ),
+    )
+    .await
+    .context("failed to init Cargo.toml")?;
+    Ok(())
+}
+
+async fn init_lib_file() -> Result<()> {
+    create_dir(Path::new("./src")).await?;
+    write(
+        "./src/lib.rs",
+        r#"
+use sewup_derive::{ewasm_constructor, ewasm_fn, ewasm_fn_sig, ewasm_main, ewasm_test};
+
+#[ewasm_constructor]
+fn constructor() {}
+
+#[ewasm_fn]
+fn hello() -> anyhow::Result<String> {
+    Ok("hello world".to_string())
+}
+
+#[ewasm_main(auto)]
+fn main() -> anyhow::Result<String> {
+    let contract = sewup::primitives::Contract::new()?;
+    let greeting = match contract.get_function_selector()? {
+        ewasm_fn_sig!(hello) => hello()?,
+        _ => panic!("unknown handle"),
+    };
+    Ok(greeting)
+}
+
+#[ewasm_test]
+mod tests {
+    use super::*;
+    use sewup_derive::{ewasm_assert_eq, ewasm_auto_assert_eq, ewasm_output_from};
+
+    #[ewasm_test]
+    fn test_get_greeting() {
+        ewasm_auto_assert_eq!(hello(), "hello world".to_string());
+    }
+}"#,
+    )
+    .await?;
+    Ok(())
+}
+
+pub async fn run() -> Result<()> {
+    tokio::try_join!(
+        init_gitignore(),
+        init_sewup_config(),
+        init_cargo_config(),
+        init_cargo_toml(),
+        init_lib_file()
+    )?;
+    Ok(())
+}

cargo-sewup/src/main.rs

@@ -8,6 +8,7 @@ use tokio;
 mod build;
 mod deploy;
 mod generate;
+mod init;
 mod inspect;
 
 #[derive(StructOpt)]
@@ -36,33 +37,48 @@ struct Opt {
     /// Generate ABI JSON if the handler is compaitabled with web3.js
     #[structopt(short, long)]
     generate_abi: bool,
+
+    /// `init` sub command to init project on current folder or on `--project_path`
+    sub_command: Option<String>,
 }
 
 #[tokio::main]
 async fn main() -> Result<()> {
     let opt = Opt::from_args();
 
     if let Some(path) = opt.project_path {
-        env::set_current_dir(&Path::new(&path))?
+        let path = Path::new(&path);
+        if tokio::fs::metadata(path).await.is_err() {
+            tokio::fs::create_dir_all(path).await?;
+        }
+        env::set_current_dir(&path)?;
+    }
+    if opt.verbose {
+        println!("project   : {}", env::current_dir()?.display());
     }
 
-    return if let Some(inspect_file) = opt.inspect_file {
-        inspect::run(inspect_file).await
-    } else if opt.generate_abi {
-        generate::run().await
-    } else {
-        if opt.verbose {
-            println!("project   : {}", env::current_dir()?.display());
+    if let Some(sub_command) = opt.sub_command {
+        if sub_command == "init" {
+            init::run().await
+        } else {
+            println!("Unknown sub command {:?}", sub_command);
+            Ok(())
         }
+    } else {
+        return if let Some(inspect_file) = opt.inspect_file {
+            inspect::run(inspect_file).await
+        } else if opt.generate_abi {
+            generate::run().await
+        } else {
+            let contract_name = build::run(opt.debug).await?;
 
-        let contract_name = build::run(opt.debug).await?;
-
-        if !opt.build_only {
-            if opt.verbose {
-                println!("contract  : {}", contract_name);
+            if !opt.build_only {
+                if opt.verbose {
+                    println!("contract  : {}", contract_name);
+                }
+                deploy::run(contract_name, opt.verbose, opt.debug).await?;
             }
-            deploy::run(contract_name, opt.verbose, opt.debug).await?;
-        }
-        Ok(())
-    };
+            Ok(())
+        };
+    }
 }