# Apprunner

The premise is simple: add commands to the yml file,run the program, get windows running your stuff!

Apprunner will build N number of named Tmux windows running the commands you provide. If given a path (and not standalone), the window will be opened at that directory location running the given command.

Prerequisites/Setup:

You DO need Tmux for this: https://github.com/tmux/tmux/wiki
Download the release for your system: https://github.com/BitlyTwiser/apprunner/releases

Fill out the yaml example:

apps:
- name: test1
command: ping google.com
standalone: true
start_location: ./var/thing
- name: test2
command: ls -la
standalone: false 
start_location: /var/log

run ./apprunner -config_path=<path_to_yaml_config>
Terminal with your set commands will appear:

How it works:

This program executes tmux hooks to spawn a session, then add N number of windows to the session passing the keys to the given window. I.e. command -> window -> execute. Example from the CLI:
```
tmux new-session -s test_sesh \; rename-window -t test_sesh:0 inner_window \; send-keys -t test_sesh:inner_window 'echo "hi" |base64' enter
```
This will spawn a new tmux session, create & rename the window, and run the command echoing hi to base64 encode.

Usage Examples:

Aside from the above example, here are some examples

Standard configuration path

./zig-out/bin/apprunner -config_path="test_config.yml"

restore from Resurrect config file:

./zig-out/bin/apprunner -restore=true

Note: restore will ony work if you have been running the application and you are using a Tmux version > 1.9! The tmux commands that are necessary to dump the sessions do not exist prior to version 1.9.

Environment Variables

If you desire to insert a specific set of environment variables to the tmux session at runtime you can add the env_path to the yaml file. The env will be loaded per session. For each app that is inserted, the values will be injected for that session. THis is done using the -e flag from the tmux api.

Example:

apps:
  - name: test1
    command: ping google.com
    standalone: true
    start_location: ./var/thing
  - name: test2
    command: ls -la
    standalone: false 
    start_location: /var/log
    env_path: .env

Note the env_path value. This specifies that the .env file should be co-located next to the binary.

You can also use relative paths:

apps:
  - name: test1
    command: ping google.com
    standalone: true
    start_location: ./var/thing
  - name: test2
    command: ls -la
    standalone: false 
    start_location: /var/log
    env_path: ../../.env

Or full absolute paths:

apps:
  - name: test1
    command: ping google.com
    standalone: true
    start_location: ./var/thing
  - name: test2
    command: ls -la
    standalone: false 
    start_location: /var/log
    env_path: /home/place/.env

Tmux Resurrect

Resurrect runs automatically unless disabled with the -disabled=true flag.

example:

./apprunner -config_path="<file_path>" -disabled=true

This will print a warning that disabled is set and resurrect will not run.

To restore your session, just run:

./zig-out/bin/apprunner -restore=true

Config file storage:

Resurrect stores a config file at $HOME/.tmux/resurrect/config.json

If the $HOME env var is not set for some reason, then its stored at /home/.tmux/resurrect/config.json

The folder and file are created automatically at application runtime.

Important Notes:

Apprunner will track user sessions that have been created within the apprunner session. It is important to note that this does not aply to all sessions that might be running!

Apprunner only tracks the sessions that was spawned with Apprunner (i.e. by running the program you spawn the session). If you make windows and panes within your apprunner sessions, those will also be captured.

If you create a new shell and start a new tmux sessions outside of app runner this would not be captured! Only the Apprunner sessions will be caught by the resurrect code :)

If the config.json file is removed, a new file will be created at runtime.

Roadmap:

[ ] Multi-pane per window support. Instead of windows only, allow for user to select a split pane layout (i.e. split pane horizontal/vertical etc..) in the Yaml file (Note - Resurrect will capture panes by default if they are created manually in the sessions)
[X] Save/Store runtime progress (like tmux resurrect)
[X] Env file loading (provide an .env and have the values loaded into the application)

BitlyTwiser / apprunner

readme