tauri-plugin-hotswap 0.0.2

Open-source OTA plugin for Tauri v2 — push frontend updates to users without rebuilding the binary. Self-hosted, signed bundles, auto-rollback.
Documentation 
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

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <title>Hotswap Example</title>
  <style>
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      max-width: 600px;
      margin: 40px auto;
      padding: 0 20px;
      background: #1a1a2e;
      color: #eee;
    }
    h1 { color: #e94560; }
    button {
      background: #e94560;
      color: white;
      border: none;
      padding: 10px 20px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 14px;
      margin: 4px;
    }
    button:hover { background: #c73652; }
    button:disabled { opacity: 0.5; cursor: not-allowed; }
    pre {
      background: #16213e;
      padding: 12px;
      border-radius: 6px;
      overflow-x: auto;
      font-size: 13px;
    }
    #status { margin: 16px 0; }
    #progress { display: none; margin: 8px 0; }
    #progress-bar {
      width: 100%;
      height: 8px;
      background: #16213e;
      border-radius: 4px;
      overflow: hidden;
    }
    #progress-fill {
      height: 100%;
      background: #e94560;
      width: 0%;
      transition: width 0.2s;
    }
  </style>
</head>
<body>
  <h1>Hotswap Example</h1>

  <div id="status">Loading version info...</div>

  <div>
    <button id="btn-check">Check for Update</button>
    <button id="btn-apply" disabled>Apply Update</button>
    <button id="btn-rollback">Rollback</button>
  </div>

  <div id="progress">
    <div id="progress-bar"><div id="progress-fill"></div></div>
    <small id="progress-text"></small>
  </div>

  <pre id="log"></pre>

  <script type="module">
    // NOTE: In a real app you'd import from the npm package:
    //   import { ... } from 'tauri-plugin-hotswap-api';
    // For this example we use invoke directly.

    const { invoke } = window.__TAURI__.core;
    const { listen } = window.__TAURI__.event;

    const log = (msg) => {
      const el = document.getElementById('log');
      el.textContent += `${new Date().toLocaleTimeString()} ${msg}\n`;
      el.scrollTop = el.scrollHeight;
    };

    const updateStatus = async () => {
      try {
        const info = await invoke('plugin:hotswap|hotswap_current_version');
        document.getElementById('status').innerHTML = info.active
          ? `Hotswap v${info.version} (seq ${info.sequence}) — binary v${info.binary_version}`
          : `Using embedded assets — binary v${info.binary_version}`;
      } catch (e) {
        log(`Error getting version: ${e}`);
      }
    };

    // Notify ready on startup
    try {
      await invoke('plugin:hotswap|hotswap_notify_ready');
      log('notifyReady() called');
    } catch (e) {
      log(`notifyReady error: ${e}`);
    }

    await updateStatus();

    // Check for update
    document.getElementById('btn-check').addEventListener('click', async () => {
      log('Checking for update...');
      try {
        const result = await invoke('plugin:hotswap|hotswap_check');
        if (result.available) {
          log(`Update available: v${result.version} (seq ${result.sequence})`);
          if (result.notes) log(`Notes: ${result.notes}`);
          document.getElementById('btn-apply').disabled = false;
        } else {
          log('No update available');
        }
      } catch (e) {
        log(`Check error: ${e}`);
      }
    });

    // Apply update with progress
    document.getElementById('btn-apply').addEventListener('click', async () => {
      const progressEl = document.getElementById('progress');
      const fillEl = document.getElementById('progress-fill');
      const textEl = document.getElementById('progress-text');
      progressEl.style.display = 'block';

      const unlisten = await listen('hotswap://download-progress', (event) => {
        const { downloaded, total } = event.payload;
        if (total) {
          const pct = Math.round((downloaded / total) * 100);
          fillEl.style.width = `${pct}%`;
          textEl.textContent = `${(downloaded / 1024).toFixed(0)} / ${(total / 1024).toFixed(0)} KB`;
        } else {
          textEl.textContent = `${(downloaded / 1024).toFixed(0)} KB downloaded`;
        }
      });

      try {
        log('Applying update...');
        const version = await invoke('plugin:hotswap|hotswap_apply');
        log(`Applied v${version}. Reload to use new assets.`);
        document.getElementById('btn-apply').disabled = true;
      } catch (e) {
        log(`Apply error: ${e}`);
      } finally {
        unlisten();
        progressEl.style.display = 'none';
      }

      await updateStatus();
    });

    // Rollback
    document.getElementById('btn-rollback').addEventListener('click', async () => {
      log('Rolling back...');
      try {
        const info = await invoke('plugin:hotswap|hotswap_rollback');
        log(info.active
          ? `Rolled back to v${info.version}`
          : 'Rolled back to embedded assets');
      } catch (e) {
        log(`Rollback error: ${e}`);
      }
      await updateStatus();
    });
  </script>
</body>
</html>