scli

scli is a simple terminal user interface for Signal. It uses signal-cli and urwid.

Features

• Vim-like navigation (j, k, g, G, etc), command entry with :.
• Optional emacs-like readline bindings for input.
• External $EDITOR support.

Limitations

• Not yet supported by signal-cli:

  • Quoting a message (#875)
  • Adding @-mentions in sent messages (#875)
  • Voice calls (#80)

• Sending read receipts for received messages.

• "View once" and "expiring" messages.

• See also: open issues.

Installation

Automatic

The following methods are supported by community and may be outdated.

• Debian / Ubuntu

Manual

Clone the repo

git clone https://github.com/isamert/scli

or download a release.

Dependencies

• signal-cli >=v0.11.0.

  Download and unpack a release, and place the signal-cli executable somewhere on the $PATH.

  Or compile from source: see install section of signal-cli readme for instructions.

• urwid

  Availble on PyPI:

   pip install urwid
  

  and in some distributions' package managers, see repology (1), (2).

• urwid_readline (optional)

  For GNU readline-like keybinds on the input line (emacs-like only).

   pip install urwid-readline
  

  Also in a few package managers.

• DBus

  Pre-installed on most linux distributions and BSDs with desktop environments. On macOS, the dbus package is available from homebrew, see signal-cli's wiki. See also the wiki's troubleshooting section.

• Python >=3.7

Registering or linking your device

Before running scli, signal-cli needs to be registered with the signal servers. You can either register a new device, or link signal-cli with an already registered device (e.g. your phone).

Linking can be done interactively with scli link, see the next section.

For more information, see: signal-cli usage, man page, and wiki.

Linking with scli link

Linking with an existing account can be done interactively with

scli link [--name DEVICE_NAME]

and following instructions on the screen. The DEVICE_NAME is optional, scli is used by default.

This requires pyqrcode package (available on PyPI and other repositories)

Verifying setup

After registering or linking, verify that the following commands work:

signal-cli -u USERNAME receive

and

signal-cli -u USERNAME daemon

where USERNAME is the phone number you have used (starting with the "+" sign followed by the country calling code). Stop the latter process (Ctrl+C) after verifying that it starts successfully and does not throw any errors.

Now you can run

scli

(if you have put it on your system's $PATH; alternatively, specify the full /path/to/executable/scli).

Usage

Key bindings

For the full list of key bindings, press ? in scli.

• F1 opens the help window.
• Tab / Shift+Tab cycle through focusable UI elements.
• j/k (or ↓/↑) move the cursor down/up in a conversation and the contacts list.
• g focuses first contact/message.
• G focuses last contact/message.
• Alt+J / Alt+K (and Alt+↓ / Alt+↑) open next / previous conversation.
• enter on a message opens attachment or URL if there is one; moves the focus to the quoted message, if it exists.
• y on a message puts it into system clipboard. (needs xclip or wl-clipboard; see --clipboard-put-command option).
• e or R on a message opens an emoji picker and sends it as a reaction. Sending an 'empty' reaction removes the previously set reaction.
• d deletes the message locally (from the current device's history).
• D remote-deletes the message (for everyone in the conversation).
• i shows a message info pop-up with the message's details.
• Alt+Enter in the input window inserts a newline.
• Esc closes opened dialogs, clears search filters, removes notifications from the status line.

If urwid_readline module is installed, all of its keybindings are available in the input widgets.

Modifying key bindings

Key bindings can be re-mapped with a --key-bind option. For example:

scli --key-bind show_message_info:s --key-bind reaction_emoji_picker:e,R,!,'ctrl r'

The syntax is

--key-bind ACTION:KEY[,KEY[,…]]

where ACTION is one of the action names (press ? in scli to show the full list of action names and their default key bindings), and KEY is the name of a key or key combo in urwid's syntax (see the table in Keyboard input section of urwid manual). Keys for several actions can be re-assigned by passing multiple --key-bind arguments to scli. Multiple keys can be assigned to a single action by separating KEYs with commas.

Commands

Commands are entered by typing : followed by a command name and arguments. For example:

:attach ~/photo.jpg Here is a picture
:read /etc/crontab

Some of the available commands are listed below; to see the full list, use :help commands in scli.

• :help [keys|commands] shows help. Unambiguous abbreviations of its argument is also allowed, e.g. :help comm, :help c, etc. When no argument provided, the general help window is shown.
• :attach FILE_PATH [MESSAGE] or :a … sends MESSAGE with FILE_PATH as an attachment.
• :edit [MESSAGE | FILE_PATH] or :e […] opens in external $EDITOR the contents of file FILE_PATH or the text MESSAGE. If MESSAGE and FILE_PATH are absent, opens an empty temporary file. See also: --editor-command config option.
• :read FILE | !COMMAND sends the contents of FILE or the output of COMMAND.

Command names are case insensitive, i.e. :edit and :eDiT do the same thing.

Modifying contacts

Modifying contacts from scli is possible if the account has been registered with signal-cli as a "primary device" (rather than linked with the phone app).

• :addContact NUMBER [NAME] adds a new contact to the contact list. Added contacts' names are local (not synced with signal servers).
• :renameContact [ID] NEW_NAME renames contact ID to NEW_NAME. ID can be either contact's phone number or contact's or group's name. If ID is not given, the contact from the currently opened conversation is used. Individual contacts' renames are local (not synced with the signal servers).

Searching

Filtering messages in a conversation is done by typing / followed by the search string. Pressing enter (or l) on a message when the search is on removes the filter (i.e. shows all the messages in a conversation) while keeping the focus on the message. Pressing Esc clears the search. Searching through contacts is analogous.

Configuration

Configuration options can be passed to scli as command-line arguments or added to the configuration file in ~/.config/sclirc. Run scli --help to show all available options.

Configuration file

Empty lines and lines starting with # are ignored. Config lines have the format OPTION = VALUE, where OPTIONs are the long forms of command-line arguments, with the leading -- omitted (e.g. enable-notifications). VALUEs for the optional arguments (a.k.a. "flags" or "switches") like --enable-notifications can be any of: true, t, yes, y (case insensitive, i.e. with any capitalization).

Example

scli --enable-notifications -w 80

Configuration file equivalent of the above command is:

enable-notifications = true
wrap-at = 80
### Short option forms (w = 80) are not valid in config file.

History

Conversations history can be enabled with --save-history or -s flag. The file will be saved in plain text (to ~/.local/share/scli/history by default). See the Security section regarding an encrypted storage.

Colors

Messages' text can be colorized using the --color option:

• --color (no additional value) Use contacts' colors from the primary signal device.

• --color=high Same as above, but use 256 colors instead of the terminal's standard 8. Colors look closer to those on official clients, but not necessarily legible on all terminals' color schemes.

• --color='{"<signal_color>": "<urwid_color>", ..., "<phone_number>": "<urwid_color>", ...}' Override colors for particular contacts or redefine signal-assigned colors; use signal-assigned colors for the rest, as above. If any of the <urwid_color>s is specified as a 256-color, the "high-color mode" will be turned on (like --color=high).

• --color='["<urwid_color_sent>", "<urwid_color_recv>"]' Use one color for sent messages and another for received messages (from any contact).

The list of available <signal_color> names is in the source code (first column). An <urwid_color> is one of urwid's 16 standard foreground colors (dark green, yellow, default, etc), or 256 foreground colors (#f8d, h123, etc). To see the available colors rendered in your terminal, run palette_test.py from urwid's examples. The single quotes in --color='...' above are just shell-escaping, and not needed in sclirc.

Security

This is an independent project not audited or endorsed by the Signal foundation. That is also true of signal-cli, which scli uses as a backend.

Data storage

Scli stores its history (if enabled with --save-history) in plain text. Likewise, signal-cli stores its data (received attachments, contacts info, encryption keys) unencrypted. To secure this data at rest, it is recommended to use full-disk encryption or dedicated tools like fscrypt.

To protect the data from potentially malicious programs running in user-space, one can run scli and signal-cli under a separate user.

For more detailed discussions, see: [1], [2].

Similar projects

• A list of TUI clients on signal-cli wiki.
• Another list of TUI clients.

Screenshots