Introduction

The arc-validate-package-registry (avpr) repository contains:

• a staging area for authoring official validation packages intended for use with arc-validate.
• a web API for serving validation packages. This API is consumed by arc-validate to install and sync validation packages.
• a website for browsing validation packages.
• some domain types and utilities relevant for consuming libraries in the AVPRIndex library
• a .NET client library for consuming the web API in the AVPRClient library

Read more at avpr.nfdi4plants.org/about

Table of contents

• General
  • CI/CD pipeline
• Validation package staging area
  • Allowed validation package file formats
  • Automated package testing
  • Package publication workflow
  • Package publication tutorial
  • Versioning packages
• Package metadata
  • YAML frontmatter
  • Frontmatter bindings
  • Mandatory fields
  • Optional fields
    • Objects
      • Author
      • Tag
• Development
  • AVPRIndex and AVPRClient libraries
    • Triggering a nuget release
  • Web API and website (PackageRegistryService)
    • Triggering a image release
    • OpenAPI endpoint documentation via Swagger UI
  • Testing

General

CI/CD pipeline

This repo runs an extensive CI/CD pipeline on every commit and PR on the main branch. The pipeline includes:

• tests and pre-publish checks for every package in the staging area.
• a release pipeline for validation packages:
  • publishing WIP packages to the avpr-preview-index on this repo's preview-index release
  • publishing stable packages to the production instance of the web API at avpr.nfdi4plants.org
• tests and release pipelines for the AVPRIndex and AVPRClient libraries, as well as a docker container for the PackageRegistryService web API.

flowchart TD

setup("<b>setup</b> <br> (determines subsequent jobs <br>based on changed files)")
batp("<b>Build and test projects</b><br>any of [AVPRIndex, AVPRClient, API]")
tsa("<b>Test staging area</b><br>test all packages in the staging area")
sapc("<b>Staging area pre-publish checks</b><br>hash verification, prevent double publication etc")
nr("<b>Release (nuget)</b><br>any of [AVPRIndex, AVPRClient]")
dr("<b>Release (docker image)</b><br>API")
upi("<b>Update preview index</b><br>update the github release index json file")
ppp("<b>Publish pending packages</b><br>Publish packages to production DB")

setup --when relevant project<br>  files change--> batp
setup --changes in the<br> staging area--> tsa
batp --when tests pass and<br> release notes change--> nr
batp --when tests pass--> dr
tsa --when tests pass--> sapc
sapc --when checks pass--> upi
sapc --when checks pass<br> and any new packages<br> are pending--> ppp

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Validation package staging area

The package staging area is intended for development and testing of validation packages.

Files in this folder must follow the naming convention <package-name>@<major>.<minor>.<patch>.* and contain a yml frontmatter at the start of the file. These files must additionally be inside a subfolder exactly named as the package name. This leads to a folder structure like this:

StagingArea
│ 
├── some-package
│   ├── some-package@1.0.0.fsx
│   ├── some-package@2.0.0.fsx
│   └── some-package@2.1.0.fsx
│ 
└── some-other-package
    ├── some-other-package@1.0.0.fsx
    ├── some-other-package@2.0.0.fsx
    └── some-other-package@3.0.0.fsx

Allowed validation package file formats

As all reference implementations are written in F#/.NET, the only currently allowed file format for validation packages is .fsx (F# script files). This can and will be expanded in the future.

Automated package testing

Any change to a package in the staging area triggers the tests located at /StagingAreaTests, which are run on every package. (see also CI/CD pipeline). publishing packages to the preview index or the production registry is only possible if all tests pass.

Package publication workflow

In principle, packages can be published via 2 channels:

• The preview index:

  The pipeline includes a Update preview index CI step that extracts metadata from the yml frontmatter of every .fsx file in the staging area and (if tests and sanity checks pass) adds it to the avpr-preview-index.json on this repo's preview-index release.

  This process is done automatically for ervery package mewrged into main, and needs no manual intervention.

• The production registry:

  Packages set to publish: true in their yml frontmatter will be published to the production registry database if they pass all tests and pre-publish checks.

Package publication tutorial

Publishing a package to the registry is a multi-step process:

Suppose you want to develop version 1.0.0 of a package called my-package.

1. fork this repo
2. Add a new blank my-package@1.0.0.fsx file to the staging area in the folder my-package.
3. Develop the package, using a work-in-process pull request to use this repository's CI to perform automated integrity tests on it. If you want to pre-release the package to the preview index, request a review for a merge into the main branch at any time.
4. Once the package is ready for production use, add publish: true to the yml frontmatter of the package file. This will trigger the CI to build and push the package to the registry once the PR is reviewed and merged.
5. Once a package is published, it cannot be unpublished or changed. To update a package, create a new script with the same name and a higher version number.

stage	availability	mutability
staging: development in this repo	version of current HEAD commit in this repo via github API-based execution in arc-validate CLI	any changes are allowed
published: available in the registry	version of the published package via the registry API	no changes are allowed

Versioning packages

Packages SHOULD be versioned according to the semantic versioning standard. This means that the version number of a package should be incremented according to the following rules:

• Major version: incremented when you make changes incompatible with previous versions
• Minor version: incremented when you add functionality in a backwards-compatible manner
• Patch version: incremented when you make backwards-compatible bug fixes

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Package metadata

YAML frontmatter

Package metadata is extracted from yml frontmatter at the start of the .fsx file, indicated by a multiline comment ((* ... *))containing the frontmatter fenced by --- at its start and end:

(*
---
<yaml frontmatter here>
---
*)

Frontmatter bindings

You can additionally bind YAML frontmatter as a string inside your package. This is recommended because you can now re-use the metadata in your package code.

This binding must be placed at the start of the file to the name PACKAGE_METADATA with a [<Literal>] attribute exactly like this:

let [<Literal>] PACKAGE_METADATA = """(*
---
<yaml frontmatter here>
---
*)"""

further down in your package code, you can now extract and use this metadata. This for example prevents you from having to repeat the package name in your package code.

#r "nuget: ARCExpect"
#r "nuget: AVPRIndex"
let metadata = ValidationPackageMetadata.extractFromString PACKAGE_METADATA

let validationCases = ...

cases
|> Execute.ValidationPipeline(
    metadata = metadata // use metadata to determine output paths and names instead of doing it manually
)

Mandatory fields

Field	Type	Description
Name	string	the name of the package
MajorVersion	int	the major version of the package
MinorVersion	int	the minor version of the package
PatchVersion	int	the patch version of the package
Summary	string	a single sentence description (<=50 words) of the package
Description	string	an unconstrained free text description of the package

Example: only mandatory fields

(*
---
Name: my-package
MajorVersion: 1
MinorVersion: 0
PatchVersion: 0
Summary: My package does the thing.
Description: |
  My package does the thing. 
  It does it very good, it does it very well. 
  It does it very fast, it does it very swell.
---
*)
let doSomeValidation () = ()
doSomeValidation ()

Optional fields

Field	Type	Description
Publish	bool	a boolean value indicating whether the package should be published to the registry. If set to true, the package will be built and pushed to the registry. If set to false (or not present), the package will be ignored.
Authors	author[]	the authors of the package. For more information about mandatory and optional fields in this object, see Objects > Author
Tags	string[]	a list of tags with optional ontology annotations that describe the package. For more information about mandatory and optional fields in this object, see Objects > Tag
ReleaseNotes	string[]	a list of release notes for the package indicating changes from previous versions

Example: all fields

(*
---
Name: my-package
MajorVersion: 1
MinorVersion: 0
PatchVersion: 0
Summary: My package does the thing.
Description: |
  My package does the thing. 
  It does it very good, it does it very well. 
  It does it very fast, it does it very swell.
Publish: true
Authors:
  - FullName: John Doe
    Email: j@d.com
    Affiliation: University of Nowhere
    AffiliationLink: https://nowhere.edu
  - FullName: Jane Doe
    Email: jj@d.com
    Affiliation: University of Somewhere
    AffiliationLink: https://somewhere.edu
Tags:
  - Name: validation
  - Name: my-tag
    TermSourceREF: my-ontology
    TermAccessionNumber: MO:12345
ReleaseNotes: |
  - initial release
    - does the thing
    - does it well"
---
*)
let doSomeValidation () = ()
doSomeValidation ()

Objects

Author

Author metadata about the people that create and maintain the package. Note that the

Field	Type	Description	Mandatory
FullName	string	the full name of the author	yes
Email	string	the email address of the author	no
Affiliation	string	the affiliation (e.g. institution) of the author	no
AffiliationLink	string	a link to the affiliation of the author	no

Tag

Tags can be any string with an optional ontology annotation from a controlled vocabulary:

Field	Type	Description	Mandatory
Name	string	the name of the tag	yes
TermSourceREF	string	Reference to a controlled vocabulary source	no
TermAccessionNumber	string	Accession in the referenced controlled vocabulary source	no

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Development

Prerequisites:

• .NET 8 SDK
• Docker
• Docker Compose

Advanced local dev functionality has only been tested on Windows with Visual Studio. For that, install the ASP.NET core workload including container features, which will enable running the Docker Compose project in Debug mode.

AVPRIndex and AVPRClient libraries

The AVPRIndex and AVPRClient libraries are located in /src and are intended for use in consuming applications.

To build them, just run dotnet build in the respective project folders or build the arc-validate-package-registry solution.

Triggering a nuget release

• Bump the version in the respective csproj or fsproj file
• Update the respective RELEASE_NOTES.md file
• CI will automatically publish the package to the nuget feed

Web API and website (PackageRegistryService)

The PackageRegistryService project located in /src is a simple ASP.NET Core (8) web API that serves validation packages and/or associated metadata via a few endpoints.

It is developed specifically for containerization and use in a docker environment.

To run the PackageRegistryService locally, ideally use VisualStudio and run the Docker Compose project in Debug mode. This will launch the stack defined at docker-compose.yml, which includes:

• the containerized PackageRegistryService application
• a postgres database seeded with the latest indexed packages
• an adminer instance for database management (will maybe be replaced by pgAdmin in the future)

In other IDEs, you can run the PackageRegistryService project directly or adjust the stack, but you will need to either set up a local postgres database and configure the connection string in appsettings.json accordingly or fine-tune the existing docker-compose file..

Triggering a image release

Currently, any change in src/PackageRegistryService will trigger a release to the production registry. This is done by the CI/CD pipeline, which builds and pushes a docker image to the registry on every relevant commit to the main branch.

This will move to a versioned release process in the future.

OpenAPI endpoint documentation via Swagger UI

The PackageRegistryService has a built-in Swagger UI endpoint for API documentation. It is served at /swagger/index.html.

Testing

There are 2 solutions that contain test projects:

• arc-validate-package-registry.sln contains the test projects for the AVPRIndex and AVPRClient libraries, as well as future API and integration tests located in /tests.
• PackageStagingArea.sln contains the tests and sanity checks for all packages in the staging area.

Run the tests with dotnet test in the respective test project folders or on the respective solution.

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