[REHEARSAL] post-drop head 8c3b95b on main @ 6306f8e — do not merge, do not review

crates/cli/src/scaffold/mod.rs

@@ -1,6 +1,7 @@
 use std::{
     env,
     fs::{self, File},
+    process::{Command, Stdio},
 };
 
 use dialoguer::{Confirm, Input, MultiSelect, console::Style, theme::ColorfulTheme};
@@ -134,6 +135,58 @@ impl ProgramMetadata {
     }
 }
 
+const DEV_SKILL_REPO: &str = "https://github.com/solana-foundation/solana-dev-skill";
+
+/// Pinned: an unversioned `npx skills` runs whatever the registry calls latest
+/// at the moment of someone's first scaffold, which is not a thing this can
+/// promise anyone. An exact version is the only form that resolves the same way
+/// twice; a range still floats to the newest release inside it.
+const DEV_SKILL_INSTALLER: &str = "skills@1.5.22";
+
+/// Builds the skill install as issue #567 specifies it, pinned, and rooted at
+/// the project being scaffolded rather than wherever the process happens to sit.
+fn dev_skill_install_command(base_location: &FileLocation) -> Command {
+    let mut command = Command::new("npx");
+    command.args([
+        "-y",
+        DEV_SKILL_INSTALLER,
+        "add",
+        DEV_SKILL_REPO,
+        "--skill",
+        "*",
+        "-y",
+    ]);
+    command.current_dir(base_location.expect_path_buf());
+    command
+}
+
+/// Starts the skill install and returns, whatever becomes of it.
+///
+/// This runs on the way to booting someone's surfnet, so it gets no say in
+/// that: never waited on, output never reaching the terminal, and nothing at
+/// all on a machine without Node — the usual case for a Rust user.
+fn spawn_dev_skill_install(mut command: Command) {
+    let Ok(mut child) = command
+        .stdin(Stdio::null())
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .spawn()
+    else {
+        return;
+    };
+    // Reaped off-thread: the child leaves no defunct entry, the scaffold no wait.
+    let _ = hiro_system_kit::thread_named("Dev Skill Install").spawn(move || {
+        let _ = child.wait();
+    });
+}
+
+/// The install that follows the confirmation, or nothing. A declined
+/// confirmation cancels the deployment, and the install is part of what it
+/// cancels.
+fn install_after_confirmation(confirmation: bool, base_location: &FileLocation) -> Option<Command> {
+    confirmation.then(|| dev_skill_install_command(base_location))
+}
+
 pub fn scaffold_in_memory_iac(
     framework: &Framework,
     programs: &[ProgramMetadata],
@@ -512,5 +565,104 @@ pub fn scaffold_iac_layout(
         println!("Deployment canceled");
     }
 
+    // Last, so the install only follows a scaffold that finished.
+    if let Some(command) = install_after_confirmation(confirmation, base_location) {
+        spawn_dev_skill_install(command);
+    }
+
     Ok(())
 }
+
+#[cfg(test)]
+mod tests {
+    use std::{
+        path::Path,
+        process::Command,
+        time::{Duration, Instant},
+    };
+
+    use super::{
+        DEV_SKILL_INSTALLER, DEV_SKILL_REPO, FileLocation, dev_skill_install_command,
+        install_after_confirmation, spawn_dev_skill_install,
+    };
+
+    #[cfg(unix)]
+    fn sh(script: &str) -> Command {
+        let mut command = Command::new("sh");
+        command.args(["-c", script]);
+        command
+    }
+
+    /// #567 supplied this invocation literally: the `-y` flags keep it off a
+    /// prompt and `--skill "*"` is what makes it the whole bundle. The one
+    /// departure from its text is the pinned version, which is here in full so
+    /// that dropping the pin has to fail this.
+    #[test]
+    fn the_install_is_the_command_issue_567_asked_for() {
+        let base = FileLocation::from_path_string("/tmp/surfpool-567-scaffold").unwrap();
+        let command = dev_skill_install_command(&base);
+        assert_eq!(command.get_program(), "npx");
+        assert_eq!(
+            command.get_args().collect::<Vec<_>>(),
+            [
+                "-y",
+                DEV_SKILL_INSTALLER,
+                "add",
+                DEV_SKILL_REPO,
+                "--skill",
+                "*",
+                "-y"
+            ]
+        );
+        let (package, version) = DEV_SKILL_INSTALLER
+            .split_once('@')
+            .expect("installer is pinned");
+        assert_eq!(package, "skills");
+        assert!(
+            version.split('.').count() == 3
+                && version
+                    .split('.')
+                    .all(|p| !p.is_empty() && p.bytes().all(|b| b.is_ascii_digit())),
+            "the installer must stay pinned to an exact version, not a range: {version}"
+        );
+    }
+
+    /// The install writes into the project being scaffolded, which is the
+    /// manifest's directory rather than the shell's. `surfpool start -m
+    /// ../elsewhere/txtx.yml` scaffolds a tree the caller is not standing in.
+    #[test]
+    fn the_install_runs_in_the_scaffolded_project_not_the_process_cwd() {
+        let base = FileLocation::from_path_string("/tmp/surfpool-567-scaffold").unwrap();
+        assert_eq!(
+            dev_skill_install_command(&base).get_current_dir(),
+            Some(Path::new("/tmp/surfpool-567-scaffold"))
+        );
+    }
+
+    /// Declining the confirmation cancels the deployment, and the install is
+    /// part of what it cancels. Nothing is built, so nothing is spawned.
+    #[test]
+    fn a_declined_confirmation_starts_no_install() {
+        let base = FileLocation::from_path_string("/tmp/surfpool-567-scaffold").unwrap();
+        assert!(install_after_confirmation(false, &base).is_none());
+        assert!(install_after_confirmation(true, &base).is_some());
+    }
+
+    /// The three ways this goes wrong on a real machine: no Node at all, an
+    /// install that fails, an install that hangs. Each returns at once and
+    /// returns nothing, so the scaffold has neither a value to branch on nor a
+    /// wait to be held by — its result and its output are the same either way.
+    #[cfg(unix)]
+    #[test]
+    fn no_outcome_of_the_install_reaches_the_scaffold() {
+        let started = Instant::now();
+        spawn_dev_skill_install(Command::new("surfpool-567-no-such-binary"));
+        spawn_dev_skill_install(sh("exit 1"));
+        spawn_dev_skill_install(sh("sleep 30"));
+        assert!(
+            started.elapsed() < Duration::from_secs(5),
+            "the scaffold waited on the install: {:?}",
+            started.elapsed()
+        );
+    }
+}