https://github.com/jdolitsky/lupo

Build Porter bundles with Lua
https://github.com/jdolitsky/lupo

cnab go golang lua porter

Last synced: 6 days ago
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Build Porter bundles with Lua

• Host: GitHub
• URL: https://github.com/jdolitsky/lupo
• Owner: jdolitsky
• License: mit
• Created: 2019-02-23T01:14:29.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2019-02-26T10:23:24.000Z (over 5 years ago)
• Last Synced: 2024-10-10T23:47:09.346Z (27 days ago)
• Topics: cnab, go, golang, lua, porter
• Language: Go
• Homepage:
• Size: 288 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-cnab - lupo - lupo is a pre-processor for Porter which allows you to build bundles with Lua (Community-Projects / Docker-App)

README

        


# lupo

`lupo` is a pre-processor for [Porter](https://porter.sh/) which allows you to build bundles with Lua.

## Install

*Note: system should already have a working Porter installation (see [install instructions](https://porter.sh/install/)). There must also be a `luac` executable in PATH (temporarily required by [Azure/golua](https://github.com/Azure/golua)).*

Just build from source and copy into PATH (requires git, make, and Go 1.11+):

```

(

  set -x && mkdir -p $GOPATH/src/github.com/jdolitsky/ && \

  cd $GOPATH/src/github.com/jdolitsky/ && \

  [ -d lupo/ ] || git clone [email protected]:jdolitsky/lupo.git && \

  cd lupo/ && make build && sudo mv bin/lupo /usr/local/bin/

)

```

## How to use

Simply use the `lupo` command in place of the `porter` command.

Replace your existing `porter.yaml` bundle definition with `porter.lua`.

Here is a simple `porter.lua` example (notice global `bundle` variable):

```lua

local name = "my-bundle"

local version = "0.1.0"

local description = "this application is extremely important"

-- Example of pushing to your personal Docker Hub account,

-- assuming USER env var matches your Docker Hub username

-- (make sure you create the "my-bundle" repo ahead of time)

local registryHost = "docker.io"

local registryRepo = os.getenv("USER") .. "/" .. name

-- Returns valid input for exec mixin

local function execEcho (desc, msg)

    return {description = desc, command = "bash", arguments = {"-c", "echo " .. msg}}

end

bundle = {

    name =  name,

    version = version,

    description = description,

    invocationImage = registryHost .. "/" .. registryRepo .. ":" .. version,

    mixins = {"exec"},

    install = {

        {

            exec = execEcho("Install " .. name, "Hello World")

        }

    },

    uninstall = {

        {

            exec = execEcho("Uninstall " .. name, "Goodbye World")

        }

    }

}

```

Run `lupo` to build the bundle from `porter.lua`:

```

$ lupo build

Copying dependencies ===>

Copying mixins ===>

Copying mixin exec ===>

Copying mixin porter ===>

...

```

If a file named `porter.lua` is detected in the working directory, `lupo` will attempt to use this to generate a `porter.yaml` file in the format expected by Porter, then run Porter itself.

Note: if there is an existing `porter.yaml`, it will be completely overwritten. You may even wish to place `porter.yaml` in your `.gitignore`, as it is dynamically generated each run.