move version checker to a thread

.gitignore

@@ -13,4 +13,5 @@ key.pem
 *.dmg
 pyinstaller/specterd
 pyinstaller/release
+pyinstaller/version.txt
 .DS_Store

pyinstaller/build-osx.sh

@@ -2,6 +2,7 @@
 
 # pass version number as an argument 
 
+echo $1 > version.txt
 pip install -e ..
 pip install -r requirements.txt
 rm -rf build/ dist/ release/

pyinstaller/build-unix.sh

@@ -2,6 +2,7 @@
 
 # pass version number as an argument 
 
+echo $1 > version.txt
 pip install -e ..
 pip install -r requirements.txt
 rm -rf build/ dist/ release/

pyinstaller/build-win.bat

@@ -1,4 +1,5 @@
 @ECHO OFF
+echo %1 > version.txt
 pip install -e ..
 pip install -r requirements.txt
 rmdir /s /q .\dist\

pyinstaller/specter_desktop.spec

@@ -40,6 +40,7 @@ a = Analysis(['specter_desktop.py'],
                     ('../src/cryptoadvance/specter/static', 'static'),
                     ("./icons", "icons"),
                     (mnemonic_path, 'mnemonic/wordlist'),
+                    ("version.txt", "."),
              ],
              hiddenimports=[
                 'pkg_resources.py2_warn',

pyinstaller/specterd.spec

@@ -25,6 +25,7 @@ a = Analysis(['specterd.py'],
              datas=[('../src/cryptoadvance/specter/templates', 'templates'), 
                     ('../src/cryptoadvance/specter/static', 'static'),
                     (mnemonic_path, 'mnemonic/wordlist'),
+                    ("version.txt", "."),
              ],
              hiddenimports=[
                 'pkg_resources.py2_warn',

src/cryptoadvance/specter/controller.py

@@ -16,8 +16,8 @@
 from flask_login.config import EXEMPT_METHODS
 
 
-from .helpers import (alias, get_devices_with_keys_by_type, 
-                      get_loglevel, get_version_info, run_shell, set_loglevel, 
+from .helpers import (alias, get_devices_with_keys_by_type,
+                      get_loglevel, run_shell, set_loglevel,
                       bcur2base64, get_txid, generate_mnemonic,
                       get_startblock_by_chain, fslock)
 from .specter import Specter
@@ -1484,9 +1484,6 @@ def notify_upgrade():
         that there is an upgrade to specter.desktop
         :return the current version
     '''
-    version_info={}
-    version_info["current"], version_info["latest"], version_info["upgrade"] = get_version_info()
-    app.logger.info("Upgrade? {}".format(version_info["upgrade"]))
-    if version_info["upgrade"]:
-        flash("There is a new version available. Consider strongly to upgrade to the new version {} with \"pip3 install cryptoadvance.specter --upgrade\"".format(version_info["latest"]), "info")
-    return version_info["current"]
+    if app.specter.version.upgrade:
+        flash(f"Upgrade notification: new version {app.specter.version.latest} is available.", "info")
+    return app.specter.version.current

src/cryptoadvance/specter/helpers.py

@@ -156,37 +156,6 @@ def get_loglevel(app):
     return loglevels[app.logger.getEffectiveLevel()]
 
 
-def get_version_info():
-    ''' Returns a triple of the current version (of the pip-package cryptoadvance.specter and 
-        the latest version and whether you should upgrade 
-    '''
-    name="cryptoadvance.specter"
-    try:
-        # fail right away if it's a binary
-        if getattr(sys, 'frozen', False):
-            raise RuntimeError("Using frozen binary, verision unavailable")
-        latest_version = str(subprocess.run([sys.executable, '-m', 'pip', 'install', '{}==random'.format(name)], capture_output=True, text=True))
-        latest_version = latest_version[latest_version.find('(from versions:')+15:]
-        latest_version = latest_version[:latest_version.find(')')]
-        latest_version = latest_version.replace(' ','').split(',')[-1]
-
-        current_version = str(subprocess.run([sys.executable, '-m', 'pip', 'show', '{}'.format(name)], capture_output=True, text=True))
-        current_version = current_version[current_version.find('Version:')+8:]
-        current_version = current_version[:current_version.find('\\n')].replace(' ','')
-        # master?
-        if current_version == 'vx.y.z-get-replaced-by-release-script':
-            current_version = 'custom'
-
-        if re.search(r"v?([\d+]).([\d+]).([\d+]).*", current_version):
-            return current_version, latest_version, latest_version != current_version
-        return current_version, latest_version, False
-    except Exception as exc:
-        # if pip is not installed or we are using python3.6 or below
-        # we just don't show the version
-        logger.error(exc)
-        return "unknown", "unknown", False
-
-
 def hwi_get_config(specter):
     config = {
         'whitelisted_domains': 'http://127.0.0.1:25441/'

src/cryptoadvance/specter/server.py

@@ -12,6 +12,7 @@
 from .hwi_server import hwi_server
 from .user import User
 from .config import DATA_FOLDER
+from .util.version import VersionChecker
 
 logger = logging.getLogger()
 
@@ -51,6 +52,11 @@ def init_app(app, hwibridge=False, specter=None):
         app.logger.info("Initializing Specter")
         specter = Specter(DATA_FOLDER)
 
+    # version checker
+    # checks for new versions once per hour
+    specter.version = VersionChecker()
+    specter.version.start()
+
     login_manager = LoginManager()
     login_manager.init_app(app)  # Enable Login
     login_manager.login_view = "login"  # Enable redirects if unauthorized

src/cryptoadvance/specter/specter.py

@@ -6,7 +6,7 @@
 import time
 import zipfile
 from io import BytesIO
-from .helpers import deep_update, clean_psbt, get_version_info
+from .helpers import deep_update, clean_psbt
 from .rpc import autodetect_rpc_confs, get_default_datadir, RpcError
 from .rpc import BitcoinRPC
 from .device_manager import DeviceManager
@@ -470,9 +470,3 @@ def specter_backup_file(self):
     def restore_from_backup(self):
         pass
 
-    @property
-    def specter_version(self):
-        if not self._current_version:
-            self._current_version = get_version_info()[0]
-        return self._current_version
-

src/cryptoadvance/specter/templates/includes/sidebar/sidebar.jinja

@@ -98,7 +98,7 @@
         <p class="warning mobile-only">&#9432;<br><b>Specter "Watch Only" Mode.</b><br>You are using Specter from a small-screen device for which some functionalities, including sending funds and creating new wallets are not yet supported.</p>
         <br>
         <div class="footer">
-	        <span>Specter Version: <strong>{{ specter.specter_version }}</strong></span>
+	        <span>Specter Version: <strong>{{ specter.version.current }}</strong></span>
             <a style="color: #fff; font-size: 1.1em; margin: 10px; text-align: center;" href="/about">
             About Specter<br>
             <img src="/static/img/icon.png" style="width: 35px;"/>

src/cryptoadvance/specter/util/version.py

@@ -0,0 +1,121 @@
+import subprocess
+import sys
+import logging
+import re
+import threading
+import time
+import os
+import requests
+
+logger = logging.getLogger(__name__)
+
+
+class VersionChecker:
+    def __init__(self, name="cryptoadvance.specter"):
+        self.name = name
+        self.current = "unknown"
+        self.latest = "unknown"
+        self.upgrade = False
+        self.running = False
+
+    def start(self):
+        if not self.running:
+            self.running = True
+            self.thread = threading.Thread(target=self.loop)
+            self.thread.daemon = True
+            self.thread.start()
+
+    def stop(self):
+        self.running = False
+
+    @property
+    def info(self):
+        return {
+            "current": self.current,
+            "latest": self.latest,
+            "upgrade": self.upgrade,
+        }
+
+    def loop(self, dt=3600):
+        """Checks for updates once per hour"""
+        while self.running:
+            self.current, self.latest, self.upgrade = self.get_version_info()
+            logger.info(f"version checked. upgrade: {self.upgrade}")
+            time.sleep(dt)
+
+    def get_binary_version(self):
+        """
+        Get binary version: current, latest.
+        Fails if version.txt is not present.
+        Returns latest = "unknown" if fetch failed.
+        """
+        version_file = "version.txt"
+        if getattr(sys, 'frozen', False):
+            version_file = os.path.join(sys._MEIPASS, 'version.txt')
+        with open(version_file) as f:
+            current = f.read().strip()
+        try:
+            releases = requests.get("https://api.github.com/repos/cryptoadvance/specter-desktop/releases").json()
+            latest = releases[0]["name"]
+        except:
+            latest = "unknown"
+        return current, latest
+
+    def get_pip_version(self):
+        latest = str(subprocess.run([
+            sys.executable, '-m', 'pip',
+            'install', f'{self.name}==random'],
+            capture_output=True, text=True))
+        latest = latest[latest.find(
+            '(from versions:')+15:]
+        latest = latest[:latest.find(')')]
+        latest = latest.replace(' ', '').split(',')[-1]
+
+        current = str(subprocess.run([
+            sys.executable, '-m', 'pip',
+            'show', f'{self.name}'],
+            capture_output=True, text=True))
+        current = current[current.find(
+            'Version:')+8:]
+        current = current[:current.find(
+            '\\n')].replace(' ', '')
+        # master?
+        if current == 'vx.y.z-get-replaced-by-release-script':
+            current = 'custom'
+            # no need to check upgrades
+            self.running = False
+        return current, latest
+
+    def get_version_info(self):
+        '''
+        Returns a triple of the current version
+        of the pip-package cryptoadvance.specter and
+        the latest version and whether you should upgrade.
+        '''
+        # check if we have version.txt file
+        # this is the case for binaries
+        current = "unknown"
+        latest = "unknown"
+        # check binary version
+        try:
+            current, latest = self.get_binary_version()
+        # if file not found
+        except FileNotFoundError as exc:
+            try:
+                current, latest = self.get_pip_version()
+            except Exception as exc:
+                logger.error(exc)
+        # other exceptions
+        except Exception as exc:
+            logger.error(exc)
+
+        # check that both current and latest versions match the pattern
+        if (re.search(r"v?([\d+]).([\d+]).([\d+]).*", current) and
+            re.search(r"v?([\d+]).([\d+]).([\d+]).*", latest)):
+            return (
+                current,
+                latest,
+                # check without leading v so v1.2.3 = 1.2.3
+                latest.replace("v","") != current.replace("v","")
+            )
+        return current, latest, False