seela

A simple tmux session manager. Lets you fuzzy-find your projects, and handles the window/pane layout based on your config.

How to build

You can build using cargo

cargo build --release

Usage

Run the binary

seela

Or specify a custom config path:

seela --config path/to/config.toml

Tmux Integration

You can use seela in tmux like this

bind g display-popup -w 80% -h 80% -E "seela"

Configuration

seela looks for a config file in the following order:

1. --config flag
2. $SEELA_CONFIG_HOME/config.toml
3. $XDG_CONFIG_HOME/seela/config.toml
4. ~/.config/seela/config.toml

Example config.toml:

[folders]
search_dirs = ["~/projects", "~/work"]
exclude_paths = ["~/projects/archive"]
force_include = ["~/special-project"]

[fzf]
preview = true
preview_command = "tree -C -L 2 {}"
fzf_opts = "--height 40% --layout=reverse"

[tmux]
# Time to wait for tmux to stabilize before sending commands (ms)
startup_delay_ms = 1000
# Delay between keys and minor actions (ms)
key_delay_ms = 100
# Delay after major actions like Enter or C-c (ms)
action_delay_ms = 200

[!TIP] If your exec commands are not running correctly (e.g., being sent before the shell is ready), try increasing the values in the [tmux] section. Different operating systems, shells, and hardware may require different timings to ensure commands are processed correctly.

Layout Configuration

You can configure your tmux session's layout. Based on the path of the project or its type.

Default Session

default_session is for projects that do not match any path or type.

[default_session]
windows = ["editor", "terminal"]
window_focus = "editor"

Custom Sessions

You can also define custom_sessions Which can match a project based on the path or type.

The projects will math the session based on this order:

1. Exact Path
2. Type Match
3. Partial Path Match (The closest match will be chosen)
4. Default Session

[[custom_sessions]]
name = "Rust Development"
types = ["rust"]  # Match projects of type 'rust'
windows = ["editor", "bacon"]
window_focus = "editor"

[[custom_sessions]]
name = "Web Development"
paths = ["~/projects/web"] # Match by path prefix
types = ["web"]            # OR match by project type
windows = ["editor", "server", "logs"]

Project Types

You can define your types like this.

[[project_types]]
name = "rust"
files = ["Cargo.toml"]

[[project_types]]
name = "web"
files = ["tsconfig.json", "package.json", "node_modules"]

Window Layouts

[[windows]]
name = "editor"
[[windows.panes]]
exec = ["nvim"]

Deeply Nested Panes

The panes are nest-able Use split = "vertical" for side-by-side panes and split = "horizontal" for top-to-bottom panes.

The split property on a "parent" pane tells seela how to lay out its "children". You can use the ratio property (a float) to define proportional sizes for panes. If omitted, panes share the available space equally.

[[windows]]
name = "dev"

[[windows.panes]]
split = "vertical"  # The children below will be side-by-side

  [[windows.panes.panes]]
  exec = ["nvim"]
  ratio = 0.7       # 70% width

  [[windows.panes.panes]]
  split = "horizontal"
  ratio = 0.3       # 30% width

    [[windows.panes.panes.panes]]
    exec = ["ls -la"]
    ratio = 0.4      # 40% height of the 30% width

    [[windows.panes.panes.panes]]
    exec = ["git status"]
    ratio = 0.6      # 60% height of the 30% width

Special Operators

You can use special operators in the exec list to control command execution:

• @run <command>: Executes the command in the pane with several environment variables set:
  • SEELA_SESSION_PATH: Absolute path to the project.
  • SEELA_SESSION_NAME: Name of the tmux session.
  • SEELA_WINDOW_NAME: Name of the current window.
  • SEELA_PANE_ID: Unique ID of the current pane.
• @confirm <command>: Prompts for confirmation (Run "command"? [Y/n]) before executing.
• @wait <seconds>: Pauses execution for the specified number of seconds.
• @wait-milli <ms> (alias @wait-ms): Pauses execution for the specified number of milliseconds.
• @send-key <key> (alias @sk): Sends a raw key or key sequence to the pane (e.g., Enter, Space, C-c, C-l).

[!NOTE] All panes need to be initialized before you you are attached to the session. This means using high @wait will make the app just stall for that period.

TODO

• Implement TOML config loading (src/config.rs)
• Recursive project discovery (look for .git folders)
• fzf integration for project selection
• Basic tmux session opening
• Complex window/pane layout support
• Different layouts based on project paths
• Custom and inbuilt types and layout based on the type