Bender init command

src/cli.rs

@@ -76,7 +76,8 @@ pub fn main() -> Result<()> {
         .subcommand(cmd::script::new())
         .subcommand(cmd::checkout::new())
         .subcommand(cmd::vendor::new())
-        .subcommand(cmd::fusesoc::new());
+        .subcommand(cmd::fusesoc::new())
+        .subcommand(cmd::init::new());
 
     // Add the `--debug` option in debug builds.
     let app = if cfg!(debug_assertions) {
@@ -100,6 +101,10 @@ pub fn main() -> Result<()> {
         ENABLE_DEBUG.store(true, std::sync::atomic::Ordering::Relaxed);
     }
 
+    if let Some(("init", matches)) = matches.subcommand() {
+        return cmd::init::run(matches);
+    }
+
     let mut force_fetch = false;
     if let Some(("update", intern_matches)) = matches.subcommand() {
         force_fetch = intern_matches.get_flag("fetch");

src/cmd/init.rs

@@ -0,0 +1,81 @@
+// Copyright (c) 2021 ETH Zurich
+// Michael Rogenmoser <[email protected]>
+
+//! The `init` subcommand.
+
+use std::env::current_dir;
+use std::ffi::OsStr;
+use std::fs::File;
+use std::io::Write;
+use std::path::Path;
+use std::process::Command as SysCommand;
+
+use clap::{ArgMatches, Command};
+
+use crate::error::*;
+
+/// Assemble the `init` subcommand.
+pub fn new() -> Command {
+    Command::new("init").about("Initialize a Bender package")
+}
+
+/// Execute the `init` subcommand.
+pub fn run(_matches: &ArgMatches) -> Result<()> {
+    // Get working directory name
+    let binding = current_dir()?;
+    let cwd = binding
+        .as_path()
+        .file_name()
+        .unwrap_or(OsStr::new("new_package"))
+        .to_str()
+        .unwrap_or("new_package");
+
+    // Get author from git config
+    let name = String::from_utf8(
+        SysCommand::new("git")
+            .args(["config", "user.name"])
+            .output()?
+            .stdout,
+    )
+    .unwrap_or("".to_string());
+    let name = &name
+        .strip_suffix("\r\n")
+        .unwrap_or(name.strip_suffix('\n').unwrap_or(&name));
+    let email = String::from_utf8(
+        SysCommand::new("git")
+            .args(["config", "user.email"])
+            .output()?
+            .stdout,
+    )
+    .unwrap_or("".to_string());
+    let email = &email
+        .strip_suffix("\r\n")
+        .unwrap_or(email.strip_suffix('\n').unwrap_or(&email));
+
+    // Create Bender.yml
+    if Path::new("Bender.yml").exists() {
+        return Err(Error::new("Bender.yml already exists"));
+    }
+
+    let mut file = File::create("Bender.yml")?;
+
+    writeln!(
+        file,
+        "\
+package:
+  name: {}
+  authors:
+    - \"{} <{}>\"
+
+dependencies:
+
+sources:
+  # Source files grouped in levels. Files in level 0 have no dependencies on files in this
+  # package. Files in level 1 only depend on files in level 0, files in level 2 on files in
+  # levels 1 and 0, etc. Files within a level are ordered alphabetically.
+  # Level 0",
+        cwd, name, email
+    )?;
+
+    Ok(())
+}

src/cmd/mod.rs

@@ -11,6 +11,7 @@ pub mod checkout;
 pub mod clone;
 pub mod config;
 pub mod fusesoc;
+pub mod init;
 pub mod packages;
 pub mod parents;
 pub mod path;