Differential D8199 Diff 29597 user/listers/crates.rst

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user/listers/crates.rst

.. _crates_lister: .. _crates_lister:

Crates lister Crates lister

============= =============

.. todo:: The Crates lister list origins from `Crates.io`_, the Rust community’s crate registry.

This page is a work in progress.

Origins are `packages`_ for the `Rust language`_ ecosystem.

Package follow a `layout specifications`_ to be usable with the `Cargo`_ package manager and have a `Cargo.toml`_ file manifest which consists in metadata to describe and build a specific package version.

As of August 2022 `Crates.io`_ list 89013 packages name for a total of 588215 released versions.

Origins retrieving strategy

---------------------------

A json http api to list packages from crates.io but we choose a `different strategy`_ in order to reduce to its bare minimum the amount of http call and bandwidth.

We clone a git repository which contains a tree of directories whose last child folder name corresponds to the package name and contains a Cargo.toml file with some json data to describe all existing versions of the package.

It takes a few seconds to clone the repository and browse it to build a full index of existing package and related versions.

The lister is incremental, so the first time it clones and browses the repository as previously described then stores the last seen commit id.

ardumontUnsubmitted

Done

It takes a few seconds to clone the repository and browse it to build a full index of existing package and related versions.

- The lister is incremental, so the first time it clone and browse the repository as previously described and store the last commit id.

+ The lister is incremental, so the first time it clones and browses the repository as previously described then stores the last seen commit id.

Next times it retrieve the list of new and changed files since last commit id and returns new or changed package with all of their related versions.

ardumont:

Next time, it retrieves the list of new and changed files since last commit id and returns new or changed package with all of their related versions.

ardumontUnsubmitted

Done

The lister is incremental, so the first time it clone and browse the repository as previously described and store the last commit id.

- Next times it retrieve the list of new and changed files since last commit id and returns new or changed package with all of their related versions.

+ Next time, it retrieves the list of new and changed files since last commit id and returns new or changed package with all of their related versions.

Note that all Git related operations are done with `Dulwich`_, a Python implementation of the Git file formats and protocols.

ardumont:

Note that all Git related operations are done with `Dulwich`_, a Python implementation of the Git file formats and protocols.

Page listing

------------

Each page is related to one package.

Each line of a page corresponds to different versions of this package.

The data schema for each line is:

ardumontUnsubmitted

Done

Each line of a page corresponds to different versions of this package.

- The data enveloppe for each line is:

+ The data envelop for each line is:

* **name**: Package name

ardumont:

vlorentzUnsubmitted

Done

"envelope", actually; "envelop" is a verb.

But I don't understand what it is supposed to mean. Why not "schema" or "keys"?

vlorentz: "envelope", actually; "envelop" is a verb. But I don't understand what it is supposed to mean.

* **name**: Package name

* **version**: Package version

* **crate_file**: Package download url

* **checksum**: Package download checksum

* **yanked**: Whether the package is yanked or not

* **last_update**: Iso8601 last update date computed upon git commit date of the related Cargo.toml file

Origins from page

-----------------

The lister yields one origin per page.

ardumontUnsubmitted

Done

-----------------

- The lister yield one origin per page.

+ The lister yields one origin per page.

The origin url corresponds to the http api url for a package, something like "https://crates.io/api/v1/crates/package_name".

ardumont:

The origin url corresponds to the http api url for a package, for example "https://crates.io/api/v1/crates/{package}".

ardumontUnsubmitted

Done

The lister yield one origin per page.

- The origin url corresponds to the http api url for a package, something like "https://crates.io/api/v1/crates/package_name".

+ The origin url corresponds to the http api url for a package, for example "https://crates.io/api/v1/crates/{package}".

Additionally we add some data set to "extra_loader_arguments":

ardumont:

Additionally we add some data set to "extra_loader_arguments":

vlorentzUnsubmitted

Done

Additionally we add some data set to "extra_loader_arguments":

- * **artifacts**: Represent data about the Crates to download, following `original-artifacts-json specification`_

+ * **artifacts**: Represent data about the Crates to download, following :ref:`original-artifacts-json specification <original-artifacts-json>`

* **crates_metadata**: To store all other interesting attributes that do not belongs to artifacts. For now it mainly indicate when a version is `yanked`_.

This is an internal link

vlorentz: This is an internal link

franckbretAuthorUnsubmitted

Done

What should be the correct syntax to reference a section in another document?

I tried those but it still fails building.

<extrinsic-metadata-specification#original-artifacts-json>
<extrinsic-metadata-specification:original-artifacts-json>

franckbret: What should be the correct syntax to reference a section in another document? I tried those…

vlorentzUnsubmitted

Done

just <original-artifacts-json>

vlorentz: just <original-artifacts-json>

franckbretAuthorUnsubmitted

Done

It still fail.

/var/lib/jenkins/workspace/DDOC/build-on-diff/swh-docs/user/listers/crates.rst:47: WARNING: undefined label: original-artifacts-json

By the way what is the quick way to check for errors within my venv?

I've tried with make docs but it fails, make all too. Looks like it complains about svg files and dia. Do I need to install dia or is it unexpected?

franckbret: It still fail. /var/lib/jenkins/workspace/DDOC/build-on-diff/swh-docs/user/listers/crates.rst…

vlorentzUnsubmitted

Not Done

/var/lib/jenkins/workspace/DDOC/build-on-diff/swh-docs/user/listers/crates.rst:47: WARNING: undefined label: original-artifacts-json

original-artifacts-json is defined in a different git repo, but this shouldn't be an issue. Hmm.....

By the way what is the quick way to check for errors within my venv?

Jenkins runs tox -e sphinx-dev

vlorentz: ``` /var/lib/jenkins/workspace/DDOC/build-on-diff/swh-docs/user/listers/crates.rst:47: WARNING…

vlorentzUnsubmitted

Not Done

OH, I got it. it's because you added this to the user documentation. We could add an inter-sphinx link, but I'd rather you move this to developer documentation instead; this page only contains technical details that aren't useful to end users.

vlorentz: OH, I got it. it's because you added this to the user documentation. We could add an inter…

franckbretAuthorUnsubmitted

Done

Ah, ok.
What should be the path of that file?

franckbret: Ah, ok. What should be the path of that file?

vlorentzUnsubmitted

Done

Make it a module docstring in swh/listers/crates/__init__.py so it shows up on https://docs.softwareheritage.org/devel/apidoc/swh.lister.crates.html which is linked from https://docs.softwareheritage.org/user/listers/index.html

vlorentz: Make it a module docstring in `swh/listers/crates/__init__.py` so it shows up on https://docs.

franckbretAuthorUnsubmitted

Done

Ok, I moved it to module level, see D8206

franckbret: Ok, I moved it to module level, see D8206

* **artifacts**: Represent data about the Crates to download, following :ref:`original-artifacts-json specification <extrinsic-metadata-specification#original-artifacts-json>`

ardumontUnsubmitted

Done

build failure is not happy about this one [1] [2]

[1]

12:19:57  /var/lib/jenkins/workspace/DDOC/build-on-diff/swh-docs/user/listers/crates.rst:48: ERROR: Unknown target name: "original-artifacts-json specification".

[2] https://jenkins.softwareheritage.org/job/DDOC/job/build-on-diff/202/console

ardumont: build failure is not happy about this one [1] [2] [1] ``` 12:19:57…

* **crates_metadata**: To store all other interesting attributes that do not belongs to artifacts. For now it mainly indicate when a version is `yanked`_.

ardumontUnsubmitted

Done

* **artifacts**: Represent data about the Crates to download, following `original-artifacts-json specification`_

- * **crates_metadata**: To store all other interesting attributes that do not belongs to artifacts. For now it mainly indicate if a version is `yanked`_.

+ * **crates_metadata**: To store all other interesting attributes that do not belongs to artifacts. For now it mainly indicates when a version is `yanked`_.

Origin data example::

ardumont:

Origin data example::

{

"url": "https://crates.io/api/v1/crates/rand",

"artifacts": [

{

"checksums": {

"sha256": "48a45b46c2a8c38348adb1205b13c3c5eb0174e0c0fec52cc88e9fb1de14c54d",

"filename": "rand-0.1.1.crate",

"url": "https://static.crates.io/crates/rand/rand-0.1.1.crate",

"version": "0.1.1",

{

"checksums": {

"sha256": "6e229ed392842fa93c1d76018d197b7e1b74250532bafb37b0e1d121a92d4cf7",

"filename": "rand-0.1.2.crate",

"url": "https://static.crates.io/crates/rand/rand-0.1.2.crate",

"version": "0.1.2",

vlorentzUnsubmitted

Done

"version": "0.1.2",

- "metadata": [

+ "crates_metadata": [

{

"version": "0.1.1",

vlorentz:

"crates_metadata": [

{

"version": "0.1.1",

"yanked": False,

{

"version": "0.1.2",

"yanked": False,

}

Running tests

-------------

Activate the virtualenv and run from within swh-lister directory:

pytest -s -vv --log-cli-level=DEBUG swh/lister/crates/tests

Testing with Docker

-------------------

Change directory to swh/docker then launch the docker environment:

docker-compose up -d

Then connect to the lister:

docker exec -it docker_swh-lister_1 bash

And run the lister (The output of this listing results in “oneshot” tasks in the scheduler):

swh lister run -l crates

.. _Crates.io: https://crates.io

.. _packages: https://doc.rust-lang.org/book/ch07-01-packages-and-crates.html

.. _Rust language: https://www.rust-lang.org/

.. _layout specifications: https://doc.rust-lang.org/cargo/guide/project-layout.html

.. _Cargo: https://doc.rust-lang.org/cargo/guide/why-cargo-exists.html#enter-cargo

.. _Cargo.toml: https://doc.rust-lang.org/cargo/reference/manifest.html

.. _different strategy: https://crates.io/data-access

.. _Dulwich: https://www.dulwich.io/

vlorentzUnsubmitted

Done

.. _Dulwich: https://www.dulwich.io/

- .. _original-artifacts-json specification: https://docs.softwareheritage.org/devel/swh-storage/extrinsic-metadata-specification.html#original-artifacts-json

.. _yanked: https://doc.rust-lang.org/cargo/reference/publishing.html#cargo-yank

see above

vlorentz: see above

.. _yanked: https://doc.rust-lang.org/cargo/reference/publishing.html#cargo-yank