chore: Port logout to be pure Rust (vercel#3302)

With this PR `turbo logout` can run without jumping to Go.

Notes:
- Used `config-rs` for our config reading. It doesn't support writing
configs to disk out of the box, but this can be solved with a wrapper
struct. This can probably be abstracted to be generic over different
configs, but we should hold off until that seems beneficial.
- `termcolor` is used for coloring output, this is the same crate that
`env_logger` uses for coloring outputs. The `UI` struct is expected to
be passed into any subcommands that need pretty output.
- A slight behavior change is that we no longer delete the entire config
file and instead make the token null (`"token": null`). If this is
unwanted, I can change it back to the old behavior, but I wanted to test
out `UserConfig::set_token` before someone else tried using it.

Co-authored-by: Leah <[email protected]>

cli/internal/cmd/root.go

@@ -70,8 +70,6 @@ func RunWithArgs(args turbostate.ParsedArgsFromRust, turboVersion string) int {
 			execErr = login.ExecuteLink(helper, &args)
 		} else if command.Login != nil {
 			execErr = login.ExecuteLogin(ctx, helper, &args)
-		} else if command.Logout != nil {
-			execErr = auth.ExecuteLogout(helper, &args)
 		} else if command.Unlink != nil {
 			execErr = auth.ExecuteUnlink(helper, &args)
 		} else if command.Daemon != nil {

crates/turborepo-lib/Cargo.toml

@@ -9,14 +9,20 @@ license = "MPL-2.0"
 assert_cmd = "2.0.7"
 itertools = "0.10.5"
 pretty_assertions = "1.3.0"
+tempfile = "3.3.0"
 
 [dependencies]
 anyhow = { version = "1.0.65", features = ["backtrace"] }
+atty = "0.2"
 chrono = "0.4.23"
 clap = { version = "4.0.22", features = ["derive"] }
 clap_complete = "4.0.6"
+config = "0.13"
+console = "0.15.5"
+dirs-next = "2.0.0"
 dunce = "1.0"
 env_logger = "0.10.0"
+lazy_static = "1.4.0"
 log = "0.4.17"
 predicates = "2.1.1"
 semver = "1.0"

crates/turborepo-lib/src/cli.rs

@@ -8,9 +8,10 @@ use log::error;
 use serde::Serialize;
 
 use crate::{
-    commands::bin,
+    commands::{bin, logout},
     get_version,
     shim::{RepoMode, RepoState},
+    ui::UI,
     Payload,
 };
 
@@ -387,9 +388,13 @@ pub fn run(repo_state: Option<RepoState>) -> Result<Payload> {
 
             Ok(Payload::Rust(Ok(0)))
         }
+        Command::Logout { .. } => {
+            logout::logout(clap_args.ui())?;
+
+            Ok(Payload::Rust(Ok(0)))
+        }
         Command::Login { .. }
         | Command::Link { .. }
-        | Command::Logout { .. }
         | Command::Unlink { .. }
         | Command::Daemon { .. }
         | Command::Prune { .. }
@@ -402,6 +407,18 @@ pub fn run(repo_state: Option<RepoState>) -> Result<Payload> {
     }
 }
 
+impl Args {
+    fn ui(&self) -> UI {
+        if self.no_color {
+            UI::new(true)
+        } else if self.color {
+            UI::new(false)
+        } else {
+            UI::infer()
+        }
+    }
+}
+
 #[cfg(test)]
 mod test {
     use std::path::PathBuf;

crates/turborepo-lib/src/commands/logout.rs

@@ -0,0 +1,19 @@
+use anyhow::Result;
+use log::error;
+
+use crate::{
+    config::{default_user_config_path, UserConfig},
+    ui::{GREY, UI},
+};
+
+pub fn logout(ui: UI) -> Result<()> {
+    let mut config = UserConfig::load(&default_user_config_path()?, None)?;
+
+    if let Err(err) = config.set_token(None) {
+        error!("could not logout. Something went wrong: {}", err);
+        return Err(err);
+    }
+
+    println!("{}", ui.apply(GREY.apply_to(">>> Logged out")));
+    Ok(())
+}

crates/turborepo-lib/src/commands/mod.rs

@@ -1 +1,2 @@
 pub(crate) mod bin;
+pub(crate) mod logout;