# Panamax

[![crates.io](https://img.shields.io/crates/v/panamax.svg)](https://crates.io/crates/panamax)
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![image](https://user-images.githubusercontent.com/1247908/132435079-b703bd5d-c139-4a73-818f-51746353b3ea.png)

Panamax is a tool to mirror the Rust and crates.io repositories, for offline usage of `rustup` and `cargo`.

## Installation

Panamax is itself available on crates.io, and can be installed via:

```
$ cargo install --locked panamax
```

Alternatively, you can clone this repository and `cargo build` or `cargo run` within it.

## Usage

## Docker

Panamax is available as a docker image, so you can run:

```
$ docker run --rm -it -v /path/to/mirror/:/mirror --user $(id -u) panamaxrs/panamax init /mirror
(Modify /path/to/mirror/mirror.toml as needed)
$ docker run --rm -it -v /path/to/mirror/:/mirror --user $(id -u) panamaxrs/panamax sync /mirror
(Once synced, serve the mirror)
$ docker run --rm -it -v /path/to/mirror/:/mirror --user $(id -u) -p8080:8080 panamaxrs/panamax serve /mirror
```

Alternatively, you can run panamax in a bare-metal environment like below.

### Init

In Panamax, mirrors consist of self-contained directories. To create a mirror directory `my-mirror`:

```
$ panamax init my-mirror
Successfully created mirror base at `my-mirror`.
Make any desired changes to my-mirror/mirror.toml, then run panamax sync my-mirror.
```

There will now be a `my-mirror` directory in your current directory.

### Modify mirror.toml

Within the directory, you'll find a `mirror.toml` file. This file contains the full configuration of the mirror, and while it has sane defaults, you should ensure the values are set to what you want.

The other important parameter to set is the `base_url` within the `[crates]` section. After `cargo` fetches the index, it will try to use this URL to actually download the crates. It's important this value is accurate, or `cargo` may not work with the mirror.

You can modify `mirror.toml` at any point in time, even after the mirror is synchronized.

### Sync

Once you have made the changes to `mirror.toml`, it is time to synchronize your mirror!

```
$ panamax sync my-mirror
Syncing Rustup repositories...
[1/5] Syncing rustup-init files... ██████████████████████████████████████████████████████████████ 27/27 [00:00:06]
[2/5] Syncing latest stable...     ████████████████████████████████████████████████████████████ 602/602 [00:09:02]
[3/5] Syncing latest beta...       ████████████████████████████████████████████████████████████ 524/524 [00:07:29]
[4/5] Syncing latest nightly...    ████████████████████████████████████████████████████████████ 546/546 [00:08:56]
[5/5] Cleaning old files...        ████████████████████████████████████████████████████████████ 546/546 [00:00:00]
Syncing Rustup repositories complete!
Syncing Crates repositories...
[1/3] Fetching crates.io-index...  ██████████████████████████████████████████████████████████ 1615/1615 [00:00:02]
[2/3] Syncing crates files...      ██████████████████████████████████████████████████████████ 6357/6357 [00:00:05]
[3/3] Syncing index and config...
Syncing Crates repositories complete!
Sync complete.
```

Once this is step completes (without download errors), you will now have a full, synchronized copy of all the files needed to use `rustup` and `cargo` to their full potential!

This directory can now be copied to a USB or rsync'd somewhere else, or even used in place - perfect for long plane trips!

Additionally, this mirror can continually by synchronized in the future - one recommendation is to run this command in a cronjob once each night, to keep the mirror reasonably up to date.

### Sync Select Dependencies
Optionally, panamax can be told to only grab crates needed to build a singular project.
`cargo vendor` is used to create a folder with all needed dependencies,
then a panamax command can parse the created directory and only grab those crates and versions.
```
# Only grab crates needed for panamax, as an example
$ cargo vendor
$ panamax sync my-mirror vendor
```

## Server

Panamax provides a warp-based HTTP(S) server that can handle serving a Rust mirror fast and at scale. This is the recommended way to serve the mirror.

```
$ panamax serve my-mirror
Running HTTP on [::]:8080
```

The server's index page provides all the instructions needed on how to set up a Rust client that uses this mirror.

If you would prefer having these instructions elsewhere, the rest of this README will describe the setup process in more detail.

Additionally, if you would prefer hosting a server with nginx, there is a sample nginx configuration in the repository, at `nginx.sample.conf`.

## Configuring `rustup` and `cargo`

Once you have a mirror server set up and running, it's time to tell your Rust components to use it.

### Setting environment variables

In order to ensure `rustup` knows where to look for the Rust components, we need to set some environment variables. Assuming the mirror is hosted at http://panamax.internal/:

```
export RUSTUP_DIST_SERVER=http://panamax.internal
export RUSTUP_UPDATE_ROOT=http://panamax.internal/rustup
```

These need to be set whenever `rustup` is used, so these should be added to your `.bashrc` file (or equivalent).

### Installing `rustup`

If you already have `rustup` installed, this step isn't necessary, however if you don't have access to https://rustup.rs, the mirror also contains the `rustup-init` files needed to install `rustup`.

Assuming the mirror is hosted at http://panamax.internal/, you will find the `rustup-init` files at http://panamax.internal/rustup/dist/. The `rustup-init` file you want depends on your architecture. Assuming you're running desktop Linux on a 64-bit machine:

```
wget http://panamax.internal/rustup/dist/x86_64-unknown-linux-gnu/rustup-init
chmod +x rustup-init
./rustup-init
```

This will let you install `rustup` the similarly following the steps from https://rustup.rs. This will also let you use `rustup` to keep your Rust installation updated in the future.

### Configuring `cargo`

`Cargo` also needs to be configured to point to the mirror. This can be done by adding the following lines to `~/.cargo/config` (creating the file if it doesn't exist):

```
[source.my-mirror]
registry = "http://panamax.internal/crates.io-index"
[source.crates-io]
replace-with = "my-mirror"
```

`Cargo` should now be pointing to the correct location to use the mirror.

### Testing configuration

You've now set up a Rust mirror! In order to make sure everything is set up properly, you can run a simple test:

```
$ cargo install ripgrep
```

This will install the grep-like `rg` tool (which is a great tool - props to burntsushi!). If `cargo` successfully downloads and builds everything, you have yourself a working mirror. Congratulations!


### Proxies

If you need to run Panamax through a proxy, you will need to set your configuration options in two places.

First, you'll need to set the environment variable `http_proxy` to something like `https://your.proxy:1234` (which can be http or https).

Second, you'll need to set an http proxy in your `~/.gitconfig`, like so:

```
[http]
    proxy = https://your.proxy:1234
```

With these two parameters set, Panamax should work through an HTTP proxy.

## License

Licensed under the terms of the MIT license and the Apache License (Version 2.0)

See [LICENSE-MIT](LICENSE-MIT) and [LICENSE-APACHE](LICENSE-APACHE) for details.

### Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any
additional terms or conditions.