swap tmux shell script for Rust binary (#177)

Author: joshuadavidthomas

.just/devtools.just

@@ -22,20 +22,7 @@ fmt:
 
 [no-cd]
 debug:
-    #!/usr/bin/env bash
-    set -euo pipefail
-
-    tmux has-session -t djls-debug 2>/dev/null && tmux kill-session -t djls-debug
-    pkill -f "lsp-devtools" || true
-
-    tmux new-session -d -s djls-debug "nvim tests/project/djls_app/templates/djls_app/base.html"
-    tmux split-window -h -p 20 "just dev devtools record"
-
-    tmux select-pane -L
-
-    tmux attach-session -t djls-debug
-
-    pkill -f "lsp-devtools" || true
+    cargo run --bin djls-tmux --package djls-dev
 
 [no-cd]
 explore FILENAME="djls.db":

crates/djls-dev/Cargo.toml

@@ -4,7 +4,12 @@ version = "0.0.0"
 edition = "2021"
 publish = false
 
+[[bin]]
+name = "djls-tmux"
+path = "src/bin/djls-tmux.rs"
+
 [dependencies]
+anyhow = { workspace = true }
 pyo3-build-config = { workspace = true }
 
 [lints]

crates/djls-dev/src/bin/djls-tmux.rs

@@ -0,0 +1,97 @@
+use std::io::Write;
+use std::process::Command;
+use std::process::Stdio;
+
+use anyhow::Context;
+use anyhow::Result;
+
+fn main() -> Result<()> {
+    // Kill any existing session
+    let _ = Command::new("tmux")
+        .args(["kill-session", "-t", "djls-debug"])
+        .output();
+
+    let _ = Command::new("pkill").args(["-f", "lsp-devtools"]).output();
+
+    // Start tmux in control mode
+    let mut tmux = Command::new("tmux")
+        .args(["-C", "-f", "/dev/null"])
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .spawn()
+        .context("Failed to start tmux control mode")?;
+
+    let stdin = tmux.stdin.as_mut().context("Failed to get tmux stdin")?;
+
+    // Create session with editor
+    writeln!(
+        stdin,
+        "new-session -d -s djls-debug 'nvim tests/project/djls_app/templates/djls_app/base.html'"
+    )?;
+
+    // Add devtools pane (20% width on the right)
+    writeln!(
+        stdin,
+        "split-window -t djls-debug -h -p 20 'just dev devtools record'"
+    )?;
+
+    // Split the right pane horizontally for server logs (50/50 split)
+    writeln!(
+        stdin,
+        "split-window -t djls-debug:0.1 -v -p 50 'tail -f /tmp/djls.log'"
+    )?;
+
+    // Set pane titles
+    writeln!(stdin, "select-pane -t djls-debug:0.0 -T 'Editor'")?;
+    writeln!(stdin, "select-pane -t djls-debug:0.1 -T 'LSP DevTools'")?;
+    writeln!(stdin, "select-pane -t djls-debug:0.2 -T 'Server Logs'")?;
+
+    // Enable pane borders with titles at the top
+    writeln!(stdin, "set -t djls-debug pane-border-status top")?;
+
+    // Add custom keybind to kill session (capital K)
+    writeln!(stdin, "bind-key K kill-session")?;
+
+    // Configure status bar with keybind hints
+    writeln!(stdin, "set -t djls-debug status on")?;
+    writeln!(stdin, "set -t djls-debug status-position bottom")?;
+    writeln!(
+        stdin,
+        "set -t djls-debug status-style 'bg=colour235,fg=colour250'"
+    )?;
+
+    // Left side: session name
+    writeln!(stdin, "set -t djls-debug status-left '[#S] '")?;
+    writeln!(stdin, "set -t djls-debug status-left-length 20")?;
+
+    // Right side: keybind hints
+    writeln!(stdin, "set -t djls-debug status-right ' C-b d: detach | C-b K: kill session | C-b x: kill pane | C-b z: zoom | C-b ?: help '")?;
+    writeln!(stdin, "set -t djls-debug status-right-length 90")?;
+
+    // Center: window name
+    writeln!(stdin, "set -t djls-debug status-justify centre")?;
+
+    // Focus editor pane
+    writeln!(stdin, "select-pane -t djls-debug:0.0")?;
+
+    // Exit control mode
+    writeln!(stdin, "detach")?;
+    stdin.flush()?;
+
+    // Close stdin to signal we're done sending commands
+    drop(tmux.stdin.take());
+
+    // Wait for control mode to finish
+    tmux.wait()?;
+
+    // Attach to session
+    Command::new("tmux")
+        .args(["attach-session", "-t", "djls-debug"])
+        .status()
+        .context("Failed to attach to session")?;
+
+    // Cleanup on exit
+    let _ = Command::new("pkill").args(["-f", "lsp-devtools"]).output();
+
+    Ok(())
+}