cnbshim

README

Cloud Native Buildpack Shim

This is a Cloud Native Buildpack that acts as a shim for Heroku Buildpacks.

To use it, install the target buildpack:

$ bin/install "path/to/buildpack.toml" "https://example.com/buildpack.tgz"

Then run this buildpack.

Example: Elixir

To use this shim with the hashnuke/elixir buildpack, install pack CLI and run:

$ cd elixir-cnb

$ curl -L https://github.com/heroku/cnb-shim/releases/download/v0.0.2/cnb-shim-v0.0.2.tgz | tar xz

$ cat > buildpack.toml << TOML
> [buildpack]
> id = "hashnuke.elixir"
> version = "0.1"
> name = "Elixir"
>
> [[stacks]]
> id = "heroku-18"
TOML

$ bin/install buildpack.toml https://buildpack-registry.s3.amazonaws.com/buildpacks/hashnuke/elixir.tgz

$ cd ~/my-elixir-app/

$ pack build elixir-app --builder heroku/buildpacks --buildpack ~/path/to/elixir-cnb

License

MIT

Documentation

Index

• func DumpExportsFile(exportsData, envDir string) error
• func ParseExportsFileLine(line string) (bool, string, string)
• func ReadProcfile(appDir string) (map[string]string, error)
• func WriteEnvFile(envDir, filename, value string) error
• func WriteLaunchMetadata(appDir, layersDir, targetBuildpackDir string, log logger.Logger) error
• type Release
  • func ExecReleaseScript(appDir, targetBuildpackDir string) (Release, error)

Functions

func DumpExportsFile

func DumpExportsFile(exportsData, envDir string) error

func ParseExportsFileLine

func ParseExportsFileLine(line string) (bool, string, string)

func ReadProcfile

func ReadProcfile(appDir string) (map[string]string, error)

func WriteEnvFile

func WriteEnvFile(envDir, filename, value string) error

func WriteLaunchMetadata

func WriteLaunchMetadata(appDir, layersDir, targetBuildpackDir string, log logger.Logger) error

Types

type Release

type Release struct {
	DefaultProcessTypes map[string]string `yaml:"default_process_types,omitempty"`
}

func ExecReleaseScript

func ExecReleaseScript(appDir, targetBuildpackDir string) (Release, error)