Plan Quickstart

All plans must have a plan.sh or plan.ps1 at the root of the plan context. They may even include both if a package is targeting both Windows and Linux platforms. This file will be used by the hab-plan-build command to build your package. To create a plan, do the following:

If you haven’t done so already, download the hab CLI and install it per the instructions on the download page.
Run hab cli setup and follow the instructions in the setup script.
The easiest way to create a plan is to use the hab plan init subcommand. This subcommand will create a directory, known as the plan context, that contains your plan file and any runtime hooks and/or templated configuration data.
To use hab plan init as part of your project repo, navigate to the root of your project repo and run hab plan init. It will create a new habitat sub-directory with a plan.sh (or plan.ps1 on Windows) based on the name of the parent directory, and include a default.toml file as well as config and hooks directories for you to populate as needed. For example:
```
cd /path/to/<reponame>
hab plan init
```
will result in a new habitat directory located at /path/to/<reponame>/habitat. A plan file will be created and the pkg_name variable will be set to <reponame>. Also, any environment variables that you have previously set (such as HAB_ORIGIN) will be used to populate the respective pkg_* variables.
If you want to auto-populate more of the pkg_* variables, you also have the option of setting them when calling hab plan init, as shown in the following example:
```
env pkg_svc_user=someuser pkg_deps="(core/make core/coreutils)" \
   pkg_license="('MIT' 'Apache-2.0')" pkg_bin_dirs="(bin sbin)" \
   pkg_version=1.0.0 pkg_description="foo" pkg_maintainer="you" \
   hab plan init yourplan
```
See hab plan init for more information on how to use this subcommand.
Now that you have stubbed out your plan file in your plan context, open it and begin modifying it to suit your needs.

When writing a plan, it’s important to understand that you are defining both how the package is built and the actions Chef Habitat will take when the Supervisor starts and manages the child processes in the package. The following sections explain what you need to do for each phase.