psmux 0.3.1

Terminal multiplexer for Windows - tmux alternative for PowerShell and Windows Terminal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289

use std::io::{self, Write};
use std::time::Duration;
use std::env;

/// Clean up any stale port files (where server is not actually running)
pub fn cleanup_stale_port_files() {
    let home = match env::var("USERPROFILE").or_else(|_| env::var("HOME")) {
        Ok(h) => h,
        Err(_) => return,
    };
    let psmux_dir = format!("{}\\.psmux", home);
    if let Ok(entries) = std::fs::read_dir(&psmux_dir) {
        for entry in entries.flatten() {
            let path = entry.path();
            if path.extension().map(|e| e == "port").unwrap_or(false) {
                if let Ok(port_str) = std::fs::read_to_string(&path) {
                    if let Ok(port) = port_str.trim().parse::<u16>() {
                        let addr = format!("127.0.0.1:{}", port);
                        if std::net::TcpStream::connect_timeout(
                            &addr.parse().unwrap(),
                            Duration::from_millis(50)
                        ).is_err() {
                            let _ = std::fs::remove_file(&path);
                        }
                    } else {
                        let _ = std::fs::remove_file(&path);
                    }
                }
            }
        }
    }
}

/// Read the session key from the key file
pub fn read_session_key(session: &str) -> io::Result<String> {
    let home = env::var("USERPROFILE").or_else(|_| env::var("HOME")).unwrap_or_default();
    let keypath = format!("{}\\.psmux\\{}.key", home, session);
    std::fs::read_to_string(&keypath).map(|s| s.trim().to_string())
}

/// Send an authenticated command to a server
pub fn send_auth_cmd(addr: &str, key: &str, cmd: &[u8]) -> io::Result<()> {
    let sock_addr: std::net::SocketAddr = addr.parse().map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))?;
    if let Ok(mut s) = std::net::TcpStream::connect_timeout(&sock_addr, Duration::from_millis(50)) {
        let _ = write!(s, "AUTH {}\n", key);
        let _ = std::io::Write::write_all(&mut s, cmd);
        let _ = s.flush();
    }
    Ok(())
}

/// Send an authenticated command and get response
pub fn send_auth_cmd_response(addr: &str, key: &str, cmd: &[u8]) -> io::Result<String> {
    let mut s = std::net::TcpStream::connect(addr)?;
    let _ = s.set_read_timeout(Some(Duration::from_millis(500)));
    let _ = write!(s, "AUTH {}\n", key);
    let _ = std::io::Write::write_all(&mut s, cmd);
    let _ = s.flush();
    let mut br = std::io::BufReader::new(&mut s);
    let mut auth_line = String::new();
    let _ = std::io::BufRead::read_line(&mut br, &mut auth_line);
    let mut buf = String::new();
    let _ = std::io::Read::read_to_string(&mut br, &mut buf);
    Ok(buf)
}

pub fn send_control(line: String) -> io::Result<()> {
    let home = env::var("USERPROFILE").or_else(|_| env::var("HOME")).unwrap_or_default();
    let target = env::var("PSMUX_TARGET_SESSION").ok().unwrap_or_else(|| "default".to_string());
    let full_target = env::var("PSMUX_TARGET_FULL").ok();
    let path = format!("{}\\.psmux\\{}.port", home, target);
    let port = std::fs::read_to_string(&path).ok().and_then(|s| s.trim().parse::<u16>().ok()).ok_or_else(|| io::Error::new(io::ErrorKind::Other, "no session"))?;
    let session_key = read_session_key(&target).unwrap_or_default();
    let addr = format!("127.0.0.1:{}", port);
    let mut stream = std::net::TcpStream::connect(addr)?;
    let _ = stream.set_read_timeout(Some(Duration::from_millis(500)));
    let _ = write!(stream, "AUTH {}\n", session_key);
    if let Some(ref ft) = full_target {
        let _ = write!(stream, "TARGET {}\n", ft);
    }
    let _ = write!(stream, "{}", line);
    let _ = stream.flush();
    // Read the "OK" response to drain the receive buffer before closing.
    // This prevents Windows from sending RST (due to unread data) which
    // could cause the server to lose the command.
    let mut buf = [0u8; 64];
    let _ = std::io::Read::read(&mut stream, &mut buf);
    Ok(())
}

pub fn send_control_with_response(line: String) -> io::Result<String> {
    let home = env::var("USERPROFILE").or_else(|_| env::var("HOME")).unwrap_or_default();
    let target = env::var("PSMUX_TARGET_SESSION").ok().unwrap_or_else(|| "default".to_string());
    let full_target = env::var("PSMUX_TARGET_FULL").ok();
    let path = format!("{}\\.psmux\\{}.port", home, target);
    let port = std::fs::read_to_string(&path).ok().and_then(|s| s.trim().parse::<u16>().ok()).ok_or_else(|| io::Error::new(io::ErrorKind::Other, "no session"))?;
    let session_key = read_session_key(&target).unwrap_or_default();
    let addr = format!("127.0.0.1:{}", port);
    let mut stream = std::net::TcpStream::connect(&addr)?;
    let _ = stream.set_read_timeout(Some(Duration::from_millis(2000)));
    let _ = write!(stream, "AUTH {}\n", session_key);
    if let Some(ref ft) = full_target {
        let _ = write!(stream, "TARGET {}\n", ft);
    }
    let _ = write!(stream, "{}", line);
    let _ = stream.flush();
    let mut buf = Vec::new();
    let mut temp = [0u8; 4096];
    loop {
        match std::io::Read::read(&mut stream, &mut temp) {
            Ok(0) => break,
            Ok(n) => buf.extend_from_slice(&temp[..n]),
            Err(e) if e.kind() == io::ErrorKind::WouldBlock || e.kind() == io::ErrorKind::TimedOut => break,
            Err(_) => break,
        }
    }
    let result = String::from_utf8_lossy(&buf).to_string();
    // Strip the "OK\n" AUTH response prefix if present
    let result = if result.starts_with("OK\n") {
        result[3..].to_string()
    } else if result.starts_with("OK\r\n") {
        result[4..].to_string()
    } else {
        result
    };
    Ok(result)
}

/// Send a control message to a specific port
pub fn send_control_to_port(port: u16, msg: &str) -> io::Result<()> {
    let addr = format!("127.0.0.1:{}", port);
    if let Ok(mut stream) = std::net::TcpStream::connect(&addr) {
        let _ = stream.write_all(msg.as_bytes());
    }
    Ok(())
}

pub fn resolve_last_session_name() -> Option<String> {
    let home = env::var("USERPROFILE").or_else(|_| env::var("HOME")).ok()?;
    let dir = format!("{}\\.psmux", home);
    let last = std::fs::read_to_string(format!("{}\\last_session", dir)).ok();
    if let Some(name) = last {
        let name = name.trim().to_string();
        let p = format!("{}\\{}.port", dir, name);
        if std::path::Path::new(&p).exists() { return Some(name); }
    }
    let mut picks: Vec<(String, std::time::SystemTime)> = Vec::new();
    if let Ok(rd) = std::fs::read_dir(&dir) {
        for e in rd.flatten() {
            if let Some(fname) = e.file_name().to_str() {
                if let Some((base, ext)) = fname.rsplit_once('.') {
                    if ext == "port" { if let Ok(md) = e.metadata() { picks.push((base.to_string(), md.modified().unwrap_or(std::time::SystemTime::UNIX_EPOCH))); } }
                }
            }
        }
    }
    picks.sort_by_key(|(_, t)| *t);
    picks.last().map(|(n, _)| n.clone())
}

pub fn resolve_default_session_name() -> Option<String> {
    if let Ok(name) = env::var("PSMUX_DEFAULT_SESSION") {
        let home = env::var("USERPROFILE").or_else(|_| env::var("HOME")).ok()?;
        let p = format!("{}\\.psmux\\{}.port", home, name);
        if std::path::Path::new(&p).exists() { return Some(name); }
    }
    let home = env::var("USERPROFILE").or_else(|_| env::var("HOME")).ok()?;
    let candidates = [format!("{}\\.psmuxrc", home), format!("{}\\.psmux\\pmuxrc", home)];
    for cfg in candidates.iter() {
        if let Ok(text) = std::fs::read_to_string(cfg) {
            let line = text.lines().find(|l| !l.trim().is_empty())?;
            let name = if let Some(rest) = line.strip_prefix("default-session ") { rest.trim().to_string() } else { line.trim().to_string() };
            let p = format!("{}\\.psmux\\{}.port", home, name);
            if std::path::Path::new(&p).exists() { return Some(name); }
        }
    }
    None
}

pub fn reap_children_placeholder() -> io::Result<bool> { Ok(false) }

/// A tree entry used by choose-tree: either a session header or a window under a session.
#[derive(Clone, Debug)]
pub struct TreeEntry {
    pub session_name: String,
    pub session_port: u16,
    pub is_session_header: bool,
    pub window_index: Option<usize>,
    pub window_name: String,
    pub window_panes: usize,
    pub window_size: String,
    pub is_current_session: bool,
    pub is_active_window: bool,
}

/// List all running sessions and their windows for choose-tree display.
/// Queries each running server via its TCP port for window list info.
pub fn list_all_sessions_tree(current_session: &str, current_windows: &[(String, usize, String, bool)]) -> Vec<TreeEntry> {
    let home = match env::var("USERPROFILE").or_else(|_| env::var("HOME")) {
        Ok(h) => h,
        Err(_) => return vec![],
    };
    let psmux_dir = format!("{}\\.psmux", home);
    let mut sessions: Vec<(String, u16, std::time::SystemTime)> = Vec::new();

    if let Ok(entries) = std::fs::read_dir(&psmux_dir) {
        for entry in entries.flatten() {
            let path = entry.path();
            if path.extension().map(|e| e == "port").unwrap_or(false) {
                if let Some(stem) = path.file_stem().and_then(|s| s.to_str()) {
                    if let Ok(port_str) = std::fs::read_to_string(&path) {
                        if let Ok(port) = port_str.trim().parse::<u16>() {
                            let mtime = entry.metadata()
                                .and_then(|m| m.modified())
                                .unwrap_or(std::time::SystemTime::UNIX_EPOCH);
                            sessions.push((stem.to_string(), port, mtime));
                        }
                    }
                }
            }
        }
    }

    sessions.sort_by_key(|(name, _, _)| name.clone());

    let mut tree = Vec::new();
    for (name, port, _) in &sessions {
        let is_current = name == current_session;
        // Session header
        tree.push(TreeEntry {
            session_name: name.clone(),
            session_port: *port,
            is_session_header: true,
            window_index: None,
            window_name: String::new(),
            window_panes: 0,
            window_size: String::new(),
            is_current_session: is_current,
            is_active_window: false,
        });

        if is_current {
            // Use local data for the current session (fast, no IPC)
            for (i, (wname, panes, size, is_active)) in current_windows.iter().enumerate() {
                tree.push(TreeEntry {
                    session_name: name.clone(),
                    session_port: *port,
                    is_session_header: false,
                    window_index: Some(i),
                    window_name: wname.clone(),
                    window_panes: *panes,
                    window_size: size.clone(),
                    is_current_session: true,
                    is_active_window: *is_active,
                });
            }
        } else {
            // Query remote session for its window list
            let key = read_session_key(name).unwrap_or_default();
            let addr = format!("127.0.0.1:{}", port);
            if let Ok(resp) = send_auth_cmd_response(&addr, &key, b"list-windows -F \"#{window_index}:#{window_name}:#{window_panes}:#{window_width}x#{window_height}:#{window_active}\"\n") {
                for line in resp.lines() {
                    let line = line.trim();
                    if line.is_empty() { continue; }
                    let parts: Vec<&str> = line.splitn(5, ':').collect();
                    if parts.len() >= 5 {
                        let wi = parts[0].parse::<usize>().unwrap_or(0);
                        let wn = parts[1].to_string();
                        let wp = parts[2].parse::<usize>().unwrap_or(1);
                        let ws = parts[3].to_string();
                        let wa = parts[4] == "1";
                        tree.push(TreeEntry {
                            session_name: name.clone(),
                            session_port: *port,
                            is_session_header: false,
                            window_index: Some(wi),
                            window_name: wn,
                            window_panes: wp,
                            window_size: ws,
                            is_current_session: false,
                            is_active_window: wa,
                        });
                    }
                }
            }
        }
    }
    tree
}