Directory Restructure (#1163)

* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path

common/eth2_testnet_config/build.rs

@@ -0,0 +1,75 @@
+//! Downloads a testnet configuration from Github.
+
+use reqwest;
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+const TESTNET_ID: &str = "schlesi-v0-11";
+
+fn main() {
+    if !base_dir().exists() {
+        std::fs::create_dir_all(base_dir()).expect(&format!("Unable to create {:?}", base_dir()));
+
+        match get_all_files() {
+            Ok(()) => (),
+            Err(e) => {
+                std::fs::remove_dir_all(base_dir()).expect(&format!(
+                    "{}. Failed to remove {:?}, please remove the directory manually because it may contains incomplete testnet data.",
+                    e,
+                    base_dir(),
+                ));
+                panic!(e);
+            }
+        }
+    }
+}
+
+pub fn get_all_files() -> Result<(), String> {
+    get_file("boot_enr.yaml")?;
+    get_file("config.yaml")?;
+    get_file("deploy_block.txt")?;
+    get_file("deposit_contract.txt")?;
+    get_file("genesis.ssz")?;
+
+    Ok(())
+}
+
+pub fn get_file(filename: &str) -> Result<(), String> {
+    let url = format!(
+        "https://raw.githubusercontent.com/goerli/schlesi/839866fe29a1b4df3a87bfe2ff1257c8a58671c9/light/{}",
+        filename
+    );
+
+    let path = base_dir().join(filename);
+    let mut file =
+        File::create(path).map_err(|e| format!("Failed to create {}: {:?}", filename, e))?;
+
+    let request = reqwest::blocking::Client::builder()
+        .build()
+        .map_err(|_| "Could not build request client".to_string())?
+        .get(&url)
+        .timeout(std::time::Duration::from_secs(120));
+
+    let contents = request
+        .send()
+        .map_err(|e| format!("Failed to download {}: {}", filename, e))?
+        .error_for_status()
+        .map_err(|e| format!("Error downloading {}: {}", filename, e))?
+        .bytes()
+        .map_err(|e| format!("Failed to read {} response bytes: {}", filename, e))?;
+
+    file.write(&contents)
+        .map_err(|e| format!("Failed to write to {}: {:?}", filename, e))?;
+
+    Ok(())
+}
+
+fn base_dir() -> PathBuf {
+    env::var("CARGO_MANIFEST_DIR")
+        .expect("should know manifest dir")
+        .parse::<PathBuf>()
+        .expect("should parse manifest dir as path")
+        .join(TESTNET_ID)
+}