Add termux support for fish_config.

share/tools/web_config/webconfig.py

@@ -49,6 +49,10 @@ def is_wsl():
                 return True
     return False
 
+def is_termux():
+    """ Return whether we are running under the Termux application for Android"""
+    return 'com.termux' in os.environ['PATH'] and 0 == os.system('which termux-open-url > /dev/null 2>&1')
+
 
 # Disable CLI web browsers
 term = os.environ.pop("TERM", None)
@@ -1505,6 +1509,8 @@ def log_error(self, format, *args):
     subprocess.check_call(["open", fileurl])
 elif is_wsl():
     subprocess.call(["cmd.exe", "/c", "start %s" % url])
+elif is_termux():
+    subprocess.call(["termux-open-url", url])
 else:
     webbrowser.open(fileurl)