chore: introduce codex-common crate (#843)

I started this PR because I wanted to share the `format_duration()`
utility function in `codex-rs/exec/src/event_processor.rs` with the TUI.
The question was: where to put it?

`core` should have as few dependencies as possible, so moving it there
would introduce a dependency on `chrono`, which seemed undesirable.
`core` already had this `cli` feature to deal with a similar situation
around sharing common utility functions, so I decided to:

* make `core` feature-free
* introduce `common`
* `common` can have as many "special interest" features as it needs,
each of which can declare their own deps
* the first two features of common are `cli` and `elapsed`

In practice, this meant updating a number of `Cargo.toml` files,
replacing this line:

```toml
codex-core = { path = "../core", features = ["cli"] }
```

with these:

```toml
codex-core = { path = "../core" }
codex-common = { path = "../common", features = ["cli"] }
```

Moving `format_duration()` into its own file gave it some "breathing
room" to add a unit test, so I had Codex generate some tests and new
support for durations over 1 minute.

.github/workflows/rust-ci.yml

@@ -93,7 +93,7 @@ jobs:
         run: find . -name Cargo.toml -mindepth 2 -maxdepth 2 -print0 | xargs -0 -n1 -I{} bash -c 'cd "$(dirname "{}")" && cargo build' || echo "FAILED=${FAILED:+$FAILED, }cargo build individual crates" >> $GITHUB_ENV
 
       - name: cargo test
-        run: cargo test --target ${{ matrix.target }} || echo "FAILED=${FAILED:+$FAILED, }cargo test" >> $GITHUB_ENV
+        run: cargo test --all-features --target ${{ matrix.target }} || echo "FAILED=${FAILED:+$FAILED, }cargo test" >> $GITHUB_ENV
 
       - name: Fail if any step failed
         if: env.FAILED != ''

codex-rs/Cargo.lock

@@ -473,6 +473,7 @@ version = "0.0.0"
 dependencies = [
  "anyhow",
  "clap",
+ "codex-common",
  "codex-core",
  "codex-exec",
  "codex-tui",
@@ -482,6 +483,15 @@ dependencies = [
  "tracing-subscriber",
 ]
 
+[[package]]
+name = "codex-common"
+version = "0.1.0"
+dependencies = [
+ "chrono",
+ "clap",
+ "codex-core",
+]
+
 [[package]]
 name = "codex-core"
 version = "0.1.0"
@@ -530,6 +540,7 @@ dependencies = [
  "anyhow",
  "chrono",
  "clap",
+ "codex-common",
  "codex-core",
  "mcp-types",
  "owo-colors 4.2.0",
@@ -596,6 +607,7 @@ dependencies = [
  "anyhow",
  "clap",
  "codex-ansi-escape",
+ "codex-common",
  "codex-core",
  "color-eyre",
  "crossterm",

codex-rs/Cargo.toml

@@ -4,6 +4,7 @@ members = [
     "ansi-escape",
     "apply-patch",
     "cli",
+    "common",
     "core",
     "exec",
     "execpolicy",

codex-rs/cli/Cargo.toml

@@ -19,6 +19,7 @@ path = "src/lib.rs"
 anyhow = "1"
 clap = { version = "4", features = ["derive"] }
 codex-core = { path = "../core" }
+codex-common = { path = "../common", features = ["cli"] }
 codex-exec = { path = "../exec" }
 codex-tui = { path = "../tui" }
 serde_json = "1"

codex-rs/cli/src/lib.rs

@@ -4,8 +4,8 @@ pub mod proto;
 pub mod seatbelt;
 
 use clap::Parser;
+use codex_common::SandboxPermissionOption;
 use codex_core::protocol::SandboxPolicy;
-use codex_core::SandboxPermissionOption;
 
 #[derive(Debug, Parser)]
 pub struct SeatbeltCommand {

codex-rs/common/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "codex-common"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+chrono = { version = "0.4.40", optional = true }
+clap = { version = "4", features = ["derive", "wrap_help"], optional = true }
+codex-core = { path = "../core" }
+
+[features]
+# Separate feature so that `clap` is not a mandatory dependency.
+cli = ["clap"]
+elapsed = ["chrono"]

codex-rs/common/README.md

@@ -0,0 +1,5 @@
+# codex-common
+
+This crate is designed for utilities that need to be shared across other crates in the workspace, but should not go in `core`.
+
+For narrow utility features, the pattern is to add introduce a new feature under `[features]` in `Cargo.toml` and then gate it with `#[cfg]` in `lib.rs`, as appropriate.

codex-rs/common/src/approval_mode_cli_arg.rs

@@ -5,9 +5,9 @@ use clap::ArgAction;
 use clap::Parser;
 use clap::ValueEnum;
 
-use crate::config::parse_sandbox_permission_with_base_path;
-use crate::protocol::AskForApproval;
-use crate::protocol::SandboxPermission;
+use codex_core::config::parse_sandbox_permission_with_base_path;
+use codex_core::protocol::AskForApproval;
+use codex_core::protocol::SandboxPermission;
 
 #[derive(Clone, Copy, Debug, ValueEnum)]
 #[value(rename_all = "kebab-case")]

codex-rs/common/src/elapsed.rs

@@ -0,0 +1,72 @@
+use chrono::Utc;
+
+/// Returns a string representing the elapsed time since `start_time` like
+/// "1m15s" or "1.50s".
+pub fn format_elapsed(start_time: chrono::DateTime<Utc>) -> String {
+    let elapsed = Utc::now().signed_duration_since(start_time);
+    format_time_delta(elapsed)
+}
+
+fn format_time_delta(elapsed: chrono::TimeDelta) -> String {
+    let millis = elapsed.num_milliseconds();
+    format_elapsed_millis(millis)
+}
+
+pub fn format_duration(duration: std::time::Duration) -> String {
+    let millis = duration.as_millis() as i64;
+    format_elapsed_millis(millis)
+}
+
+fn format_elapsed_millis(millis: i64) -> String {
+    if millis < 1000 {
+        format!("{}ms", millis)
+    } else if millis < 60_000 {
+        format!("{:.2}s", millis as f64 / 1000.0)
+    } else {
+        let minutes = millis / 60_000;
+        let seconds = (millis % 60_000) / 1000;
+        format!("{minutes}m{seconds:02}s")
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use chrono::Duration;
+
+    #[test]
+    fn test_format_time_delta_subsecond() {
+        // Durations < 1s should be rendered in milliseconds with no decimals.
+        let dur = Duration::milliseconds(250);
+        assert_eq!(format_time_delta(dur), "250ms");
+
+        // Exactly zero should still work.
+        let dur_zero = Duration::milliseconds(0);
+        assert_eq!(format_time_delta(dur_zero), "0ms");
+    }
+
+    #[test]
+    fn test_format_time_delta_seconds() {
+        // Durations between 1s (inclusive) and 60s (exclusive) should be
+        // printed with 2-decimal-place seconds.
+        let dur = Duration::milliseconds(1_500); // 1.5s
+        assert_eq!(format_time_delta(dur), "1.50s");
+
+        // 59.999s rounds to 60.00s
+        let dur2 = Duration::milliseconds(59_999);
+        assert_eq!(format_time_delta(dur2), "60.00s");
+    }
+
+    #[test]
+    fn test_format_time_delta_minutes() {
+        // Durations ≥ 1 minute should be printed mmss.
+        let dur = Duration::milliseconds(75_000); // 1m15s
+        assert_eq!(format_time_delta(dur), "1m15s");
+
+        let dur_exact = Duration::milliseconds(60_000); // 1m0s
+        assert_eq!(format_time_delta(dur_exact), "1m00s");
+
+        let dur_long = Duration::milliseconds(3_601_000);
+        assert_eq!(format_time_delta(dur_long), "60m01s");
+    }
+}

codex-rs/common/src/lib.rs

@@ -0,0 +1,10 @@
+#[cfg(feature = "cli")]
+mod approval_mode_cli_arg;
+
+#[cfg(feature = "elapsed")]
+pub mod elapsed;
+
+#[cfg(feature = "cli")]
+pub use approval_mode_cli_arg::ApprovalModeCliArg;
+#[cfg(feature = "cli")]
+pub use approval_mode_cli_arg::SandboxPermissionOption;

codex-rs/core/Cargo.toml

@@ -56,9 +56,3 @@ assert_cmd = "2"
 predicates = "3"
 tempfile = "3"
 wiremock = "0.6"
-
-[features]
-default = []
-
-# Separate feature so that `clap` is not a mandatory dependency.
-cli = ["clap"]

codex-rs/core/src/config.rs

@@ -266,7 +266,7 @@ pub fn log_dir() -> std::io::Result<PathBuf> {
     Ok(p)
 }
 
-pub(crate) fn parse_sandbox_permission_with_base_path(
+pub fn parse_sandbox_permission_with_base_path(
     raw: &str,
     base_path: PathBuf,
 ) -> std::io::Result<SandboxPermission> {

codex-rs/core/src/lib.rs

@@ -26,10 +26,3 @@ pub mod util;
 mod zdr_transcript;
 
 pub use codex::Codex;
-
-#[cfg(feature = "cli")]
-mod approval_mode_cli_arg;
-#[cfg(feature = "cli")]
-pub use approval_mode_cli_arg::ApprovalModeCliArg;
-#[cfg(feature = "cli")]
-pub use approval_mode_cli_arg::SandboxPermissionOption;

codex-rs/exec/Cargo.toml

@@ -15,7 +15,8 @@ path = "src/lib.rs"
 anyhow = "1"
 chrono = "0.4.40"
 clap = { version = "4", features = ["derive"] }
-codex-core = { path = "../core", features = ["cli"] }
+codex-core = { path = "../core" }
+codex-common = { path = "../common", features = ["cli", "elapsed"] }
 mcp-types = { path = "../mcp-types" }
 owo-colors = "4.2.0"
 serde_json = "1"

codex-rs/exec/src/cli.rs

@@ -1,6 +1,6 @@
 use clap::Parser;
 use clap::ValueEnum;
-use codex_core::SandboxPermissionOption;
+use codex_common::SandboxPermissionOption;
 use std::path::PathBuf;
 
 #[derive(Parser, Debug)]

codex-rs/exec/src/event_processor.rs

@@ -1,4 +1,5 @@
 use chrono::Utc;
+use codex_common::elapsed::format_elapsed;
 use codex_core::protocol::Event;
 use codex_core::protocol::EventMsg;
 use codex_core::protocol::FileChange;
@@ -145,7 +146,7 @@ impl EventProcessor {
                 }) = exec_command
                 {
                     (
-                        format_duration(start_time),
+                        format!(" in {}", format_elapsed(start_time)),
                         format!("{}", escape_command(&command).style(self.bold)),
                     )
                 } else {
@@ -160,7 +161,7 @@ impl EventProcessor {
                     .join("\n");
                 match exit_code {
                     0 => {
-                        let title = format!("{call} succeded{duration}:");
+                        let title = format!("{call} succeeded{duration}:");
                         ts_println!("{}", title.style(self.green));
                     }
                     _ => {
@@ -221,7 +222,7 @@ impl EventProcessor {
                     ..
                 }) = info
                 {
-                    (format_duration(start_time), invocation)
+                    (format!(" in {}", format_elapsed(start_time)), invocation)
                 } else {
                     (String::new(), format!("tool('{call_id}')"))
                 };
@@ -335,7 +336,7 @@ impl EventProcessor {
                 }) = patch_begin
                 {
                     (
-                        format_duration(start_time),
+                        format!(" in {}", format_elapsed(start_time)),
                         format!("apply_patch(auto_approved={})", auto_approved),
                     )
                 } else {
@@ -383,13 +384,3 @@ fn format_file_change(change: &FileChange) -> &'static str {
         } => "M",
     }
 }
-
-fn format_duration(start_time: chrono::DateTime<Utc>) -> String {
-    let elapsed = Utc::now().signed_duration_since(start_time);
-    let millis = elapsed.num_milliseconds();
-    if millis < 1000 {
-        format!(" in {}ms", millis)
-    } else {
-        format!(" in {:.2}s", millis as f64 / 1000.0)
-    }
-}

codex-rs/mcp-server/Cargo.toml

@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-codex-core = { path = "../core", features = ["cli"] }
+codex-core = { path = "../core" }
 mcp-types = { path = "../mcp-types" }
 schemars = "0.8.22"
 serde = { version = "1", features = ["derive"] }

codex-rs/tui/Cargo.toml

@@ -15,7 +15,8 @@ path = "src/lib.rs"
 anyhow = "1"
 clap = { version = "4", features = ["derive"] }
 codex-ansi-escape = { path = "../ansi-escape" }
-codex-core = { path = "../core", features = ["cli"] }
+codex-core = { path = "../core" }
+codex-common = { path = "../common", features = ["cli", "elapsed"] }
 color-eyre = "0.6.3"
 crossterm = "0.28.1"
 mcp-types = { path = "../mcp-types" }

codex-rs/tui/src/cli.rs

@@ -1,6 +1,6 @@
 use clap::Parser;
-use codex_core::ApprovalModeCliArg;
-use codex_core::SandboxPermissionOption;
+use codex_common::ApprovalModeCliArg;
+use codex_common::SandboxPermissionOption;
 use std::path::PathBuf;
 
 #[derive(Parser, Debug)]

codex-rs/tui/src/history_cell.rs

@@ -1,4 +1,5 @@
 use codex_ansi_escape::ansi_escape_line;
+use codex_common::elapsed::format_duration;
 use codex_core::config::Config;
 use codex_core::protocol::FileChange;
 use ratatui::prelude::*;
@@ -132,7 +133,12 @@ impl HistoryCell {
         // Title depends on whether we have output yet.
         let title_line = Line::from(vec![
             "command".magenta(),
-            format!(" (code: {}, duration: {:?})", exit_code, duration).dim(),
+            format!(
+                " (code: {}, duration: {})",
+                exit_code,
+                format_duration(duration)
+            )
+            .dim(),
         ]);
         lines.push(title_line);
 
@@ -201,11 +207,11 @@ impl HistoryCell {
         success: bool,
         result: Option<serde_json::Value>,
     ) -> Self {
-        let duration = start.elapsed();
+        let duration = format_duration(start.elapsed());
         let status_str = if success { "success" } else { "failed" };
         let title_line = Line::from(vec![
             "tool".magenta(),
-            format!(" {fq_tool_name} ({status_str}, duration: {:?})", duration).dim(),
+            format!(" {fq_tool_name} ({status_str}, duration: {})", duration).dim(),
         ]);
 
         let mut lines: Vec<Line<'static>> = Vec::new();