# Upgrading a package to v1.0 and developping

**URL:** https://discourse.julialang.org/t/upgrading-a-package-to-v1-0-and-developping/17371
**Category:** New to Julia
**Created:** [November 9, 2018, 11:00pm UTC](https://discourse.julialang.org/t/upgrading-a-package-to-v1-0-and-developping/17371 "2018-11-09T23:00:55Z")
**Posts on this page:** 1
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### Author: ![00vareladavid](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/00vareladavid/32/23521_2.png) [@00vareladavid](https://discourse.julialang.org/u/00vareladavid)
#### Post date: [November 10, 2018, 12:11am UTC](https://discourse.julialang.org/t/upgrading-a-package-to-v1-0-and-developping/17371/2 "2018-11-10T00:11:25Z")

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1. You can do `(v1.0) pkg> generate PDMP` and copy over the `Project.toml` file to the already existing project. Just make sure the existing project contains this subtree

```julia
├── Project.toml
└── src
    └── PDMP.jl

```

At this point, your project will be a valid Pkg project. The rest of the process is more documented.
2. To develop the project: activate it and add dependencies:
  - `(v1.0) pkg> activate ~/work/prog_gd/julia/dev/PDMP.jl`
  - `(PDMP) pkg> add Dep1 Dep2 ...`

3. Now you can develop your project; just make sure your project stays activated. In other words: as long as the Pkg prompt is `(PDMP) pkg>` you will be able to do `julia> import PDMP`.

* * *

Conceptually:

1. Step 1 gets you to a valid project directory in a slightly hacky way (there is an [open PR](https://github.com/JuliaLang/Pkg.jl/pull/889).)
2. Pkg is based on environments. You point Pkg at the environment you want to use by using `activate`. You specify the packages which should be available in that environment by using `add`.
3. Once you set up your environment, you can develop normally. You can load any dependency declared in your `Project.toml` file with `using`/`import`.

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