Introduce cargo xtasks pattern

.cargo/config.toml

@@ -1,3 +1,6 @@
+[alias]
+xtask = "run --quiet --package xtask --"
+
 # On Windows MSVC, statically link the C runtime so that the resulting EXE does
 # not depend on the vcruntime DLL.
 [target.'cfg(windows)']

Cargo.toml

@@ -8,6 +8,7 @@ members = [
     "utils/create-output-dir",
     "utils/scarb-test-support",
     "utils/test-for-each-example",
+    "xtask",
 ]
 
 [workspace.package]
@@ -83,6 +84,7 @@ typed-builder = "0.14.0"
 url = { version = "2.3.1", features = ["serde"] }
 walkdir = "2.3.3"
 which = "4.4.0"
+xshell = "0.2.5"
 xxhash-rust = { version = "0.8.6", features = ["xxh3"] }
 zip = { version = "0.6.6", default-features = false, features = ["deflate"] }
 

pkg/archive/package.sh

@@ -14,7 +14,7 @@ mkdir -p \
   "$STAGING/bin/" \
   "$STAGING/doc/"
 
-for crate in $(pkg/list-binaries.sh); do
+for crate in $(cargo xtask list-binaries); do
   cp "target/$TARGET/release/${crate}${bin_ext}" "$STAGING/bin/"
 done
 

xtask/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "xtask"
+version = "1.0.0"
+edition.workspace = true
+publish = false
+
+[dependencies]
+anyhow.workspace = true
+clap.workspace = true
+xshell.workspace = true

xtask/src/list_binaries.rs

@@ -0,0 +1,11 @@
+use anyhow::Result;
+use std::fs;
+
+pub fn main() -> Result<()> {
+    println!("scarb");
+    for entry in fs::read_dir("extensions")? {
+        let entry = entry?;
+        println!("{}", entry.file_name().to_string_lossy());
+    }
+    Ok(())
+}

xtask/src/main.rs

@@ -0,0 +1,22 @@
+use anyhow::Result;
+use clap::{Parser, Subcommand};
+
+mod list_binaries;
+
+#[derive(Parser)]
+struct Args {
+    #[command(subcommand)]
+    command: Command,
+}
+
+#[derive(Subcommand, Clone, Debug)]
+pub enum Command {
+    ListBinaries,
+}
+
+fn main() -> Result<()> {
+    let args = Args::parse();
+    match args.command {
+        Command::ListBinaries => list_binaries::main(),
+    }
+}