diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d0fb19c..839c429 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,42 +1,43 @@
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v4.1.0
     hooks:
       - id: trailing-whitespace
       - id: check-json
       - id: check-yaml
 
   - repo: https://gitlab.com/pycqa/flake8
     rev: 4.0.1
     hooks:
       - id: flake8
         additional_dependencies: [flake8-bugbear==22.3.23]
 
   - repo: https://github.com/codespell-project/codespell
     rev: v2.1.0
     hooks:
       - id: codespell
         name: Check source code spelling
         exclude: ^(swh/loader/package/.*[/]+tests/data/.*)$
+        args: [-L crate]
         entry: codespell --ignore-words-list=iff
         stages: [commit]
 
   - repo: local
     hooks:
       - id: mypy
         name: mypy
         entry: mypy
         args: [swh]
         pass_filenames: false
         language: system
         types: [python]
 
   - repo: https://github.com/PyCQA/isort
     rev: 5.10.1
     hooks:
       - id: isort
 
   - repo: https://github.com/python/black
     rev: 22.3.0
     hooks:
       - id: black
diff --git a/docs/package-loader-specifications.rst b/docs/package-loader-specifications.rst
index b53577b..caad4ac 100644
--- a/docs/package-loader-specifications.rst
+++ b/docs/package-loader-specifications.rst
@@ -1,124 +1,133 @@
 .. _package-loader-specifications:
 
 Package loader specifications
 =============================
 
 Release fields
 --------------
 
 Here is an overview of the fields (+ internal version name + branch name) used by each package loader, after D6616:
 
 .. list-table:: Fields used by each package loader
    :header-rows: 1
 
    * - Loader
      - internal version
      - branch name
      - name
      - message
      - synthetic
      - author
      - date
      - Notes
    * - archive
      - passed as arg
      - ``release_name(​version)``
      - =version
      - "Synthetic release for archive at {p_info.url}\n"
      - true
      - ""
      - passed as arg
      -
    * - cran
      - ``metadata.get(​"Version", passed as arg)``
      - ``release_name(​version)``
      - =version
      - standard message
      - true
      - ``metadata.get(​"Maintainer", "")``
      - ``metadata.get(​"Date")``
      - metadata is intrinsic
+   * - crates
+     - passed as arg
+     - ``release_name(​version, filename)``
+     - =version
+     - Synthetic release for Crate source package {p_info.name} version {p_info.version} {description}
+     - true
+     - from intrinsic metadata
+     - from extrinsic metadata
+     - ``i_metadata`` for intrinsic metadata, ``e_metadata`` for extrinsic metadata
    * - debian
      - =``version``
      - ``release_name(​version)``
      - =``i_version``
      - standard message (using ``i_version``)
      - true
      - ``metadata​.changelog​.person``
      - ``metadata​.changelog​.date``
      - metadata is intrinsic. Old revisions have ``dsc`` as type
        ``i_version`` is the intrinsic version (eg. ``0.7.2-3``) while ``version``
        contains the debian suite name (eg. ``stretch/contrib/0.7.2-3``) and is
        passed as arg
    * - deposit
      - HEAD
      - only HEAD
      - HEAD
      - "{client}: Deposit {id} in collection {collection}\n"
      - true
      - original author
      - ``<codemeta: dateCreated>`` from SWORD XML
      - revisions had parents
    * - maven-loader
      - passed as arg
      - HEAD
      - ``release_name(version)``
      - "Synthetic release for archive at {p_info.url}\n"
      - true
      - ""
      - passed as arg
      - Only one artefact per url (jar/zip src)
    * - nixguix
      - URL
      - URL
      - URL
      - None
      - true
      - ""
      - None
      - it's the URL of the artifact referenced by the derivation
    * - npm
      - ``metadata​["version"]``
      - ``release_name(​version)``
      - =version
      - standard message
      - true
      - from int metadata or ""
      - from ext metadata or None
      -
    * - opam
      - as given by opam
      - "{opam_package}​.{version}"
      - =version
      - standard message
      - true
      - from metadata
      - None
      - "{self.opam_package}​.{version}" matches the version names used by opam's backend. metadata is extrinsic
    * - pypi
      - ``metadata​["version"]``
      - ``release_name(​version)`` or ``release_name(​version, filename)``
      - =version
      - ``metadata[​'comment_text']}`` or standard message
      - true
      - from int metadata or ""
      - from ext metadata or None
      - metadata is intrinsic
 
 using this function::
 
     def release_name(version: str, filename: Optional[str] = None) -> str:
         if filename:
             return "releases/%s/%s" % (version, filename)
         return "releases/%s" % version
 
 and "standard message" being::
 
     msg = (
         f"Synthetic release for {PACKAGE_MANAGER} source package {name} "
         f"version {version}\n"
     )
 
 
 The ``target_type`` field is always ``dir``, and the target the id of a directory
 loaded by unpacking a tarball/zip file/...
diff --git a/requirements.txt b/requirements.txt
index 3be0d4a..644a170 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,12 @@
 # Add here external Python modules dependencies, one per line. Module names
 # should match https://pypi.python.org/pypi names. For the full spec or
 # dependency lines, see https://pip.readthedocs.org/en/1.1/requirements.html
 
 psutil
 requests
 iso8601
 pkginfo
 python-debian
 python-dateutil
 typing-extensions
+toml
diff --git a/setup.py b/setup.py
index 81f0481..a4f4d95 100755
--- a/setup.py
+++ b/setup.py
@@ -1,81 +1,82 @@
 #!/usr/bin/env python3
 # Copyright (C) 2015-2018  The Software Heritage developers
 # See the AUTHORS file at the top-level directory of this distribution
 # License: GNU General Public License version 3, or any later version
 # See top-level LICENSE file for more information
 
 from io import open
 from os import path
 
 from setuptools import find_packages, setup
 
 here = path.abspath(path.dirname(__file__))
 
 # Get the long description from the README file
 with open(path.join(here, "README.rst"), encoding="utf-8") as f:
     long_description = f.read()
 
 
 def parse_requirements(name=None):
     if name:
         reqf = "requirements-%s.txt" % name
     else:
         reqf = "requirements.txt"
 
     requirements = []
     if not path.exists(reqf):
         return requirements
 
     with open(reqf) as f:
         for line in f.readlines():
             line = line.strip()
             if not line or line.startswith("#"):
                 continue
             requirements.append(line)
     return requirements
 
 
 setup(
     name="swh.loader.core",
     description="Software Heritage Base Loader",
     long_description=long_description,
     long_description_content_type="text/markdown",
     python_requires=">=3.7",
     author="Software Heritage developers",
     author_email="swh-devel@inria.fr",
     url="https://forge.softwareheritage.org/diffusion/DLDBASE",
     packages=find_packages(),  # packages's modules
     scripts=[],  # scripts to package
     install_requires=parse_requirements() + parse_requirements("swh"),
     setup_requires=["setuptools-scm"],
     use_scm_version=True,
     extras_require={"testing": parse_requirements("test")},
     include_package_data=True,
     entry_points="""
         [swh.cli.subcommands]
         loader=swh.loader.cli
         [swh.workers]
         loader.archive=swh.loader.package.archive:register
         loader.cran=swh.loader.package.cran:register
+        loader.crates=swh.loader.package.crates:register
         loader.debian=swh.loader.package.debian:register
         loader.deposit=swh.loader.package.deposit:register
         loader.nixguix=swh.loader.package.nixguix:register
         loader.npm=swh.loader.package.npm:register
         loader.opam=swh.loader.package.opam:register
         loader.pypi=swh.loader.package.pypi:register
         loader.maven=swh.loader.package.maven:register
     """,
     classifiers=[
         "Programming Language :: Python :: 3",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
         "Operating System :: OS Independent",
         "Development Status :: 5 - Production/Stable",
     ],
     project_urls={
         "Bug Reports": "https://forge.softwareheritage.org/maniphest",
         "Funding": "https://www.softwareheritage.org/donate",
         "Source": "https://forge.softwareheritage.org/source/swh-loader-core",
         "Documentation": "https://docs.softwareheritage.org/devel/swh-loader-core/",
     },
 )
diff --git a/swh/loader/package/crates/__init__.py b/swh/loader/package/crates/__init__.py
new file mode 100644
index 0000000..ec7214c
--- /dev/null
+++ b/swh/loader/package/crates/__init__.py
@@ -0,0 +1,17 @@
+# Copyright (C) 2022  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+
+from typing import Any, Mapping
+
+
+def register() -> Mapping[str, Any]:
+    """Register the current worker module's definition"""
+    from .loader import CratesLoader
+
+    return {
+        "task_modules": [f"{__name__}.tasks"],
+        "loader": CratesLoader,
+    }
diff --git a/swh/loader/package/crates/loader.py b/swh/loader/package/crates/loader.py
new file mode 100644
index 0000000..4b59015
--- /dev/null
+++ b/swh/loader/package/crates/loader.py
@@ -0,0 +1,355 @@
+# Copyright (C) 2022  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+from distutils.version import StrictVersion
+import json
+from pathlib import Path
+from typing import Any, Dict, Iterator, List, Optional, Sequence, Tuple
+from urllib.parse import urlparse
+
+import attr
+import toml
+from typing_extensions import TypedDict
+
+from swh.loader.package.loader import BasePackageInfo, PackageLoader
+from swh.loader.package.utils import api_info, cached_method, release_name
+from swh.model.model import ObjectType, Person, Release, Sha1Git, TimestampWithTimezone
+from swh.storage.interface import StorageInterface
+
+
+class ExtrinsicPackageMetadata(TypedDict):
+    """Data structure for package extrinsic metadata pulled from http api endpoint.
+
+    We set only the keys we need according to what is available when querying
+    https://crates.io/api/v1/crates/<name>, where `name` is the name of the crate
+    package.
+
+    Json response example for https://crates.io/api/v1/crates/hg-core :
+
+    .. literalinclude:: ../../swh/loader/package/crates/tests/data/https_crates.io/api_v1_crates_hg-core
+
+    Usage example:
+
+    .. code-block:: python
+
+        e_metadata = ExtrinsicPackageMetadata(**self.info())
+
+    """  # noqa
+
+    categories: List[Dict[Any, Any]]
+    """Related categories"""
+
+    crate: Dict[Any, Any]
+    """Crate project information"""
+
+    keywords: List[Any]
+    """Keywords"""
+
+    versions: List[Dict[Any, Any]]
+    """A list of released versions for a crate"""
+
+
+class ExtrinsicVersionPackageMetadata(TypedDict):
+    """Data structure for specific package version extrinsic metadata, pulled
+    from http api endpoint.
+
+    Similar to `ExtrinsicPackageMetadata` in its usage, but we flatten the data
+    related to a specific version.
+    """
+
+    crate: str
+    """The package name"""
+
+    crate_size: int
+    """The package size"""
+
+    created_at: str
+    """First released at"""
+
+    downloads: str
+    """Number of downloads"""
+
+    license: str
+    """Package license"""
+
+    num: str
+    """Package version"""
+
+    published_by: Dict[Any, Any]
+    """Publishers information"""
+
+    updated_at: str
+    """Last update"""
+
+    yanked: bool
+    """Is that version yanked? (yanked means release-level deprecation)"""
+
+
+class IntrinsicPackageMetadata(TypedDict):
+    """Data structure for specific package version intrinsic metadata.
+
+    Data is extracted from the crate package's .toml file. Then the data of the
+    'package' entry is flattened.
+
+    Cargo.toml file content example:
+
+    .. code-block:: toml
+
+        [package]
+        name = "hg-core"
+        version = "0.0.1"
+        authors = ["Georges Racinet <georges.racinet@octobus.net>"]
+        description = "Mercurial pure Rust core library, with no assumption on
+        Python bindings (FFI)"
+        homepage = "https://mercurial-scm.org"
+        license = "GPL-2.0-or-later"
+        repository = "https://www.mercurial-scm.org/repo/hg"
+
+        [lib]
+        name = "hg"
+        [dev-dependencies.rand]
+        version = "~0.6"
+
+        [dev-dependencies.rand_pcg]
+        version = "~0.1"
+
+    :param toml: toml object
+    """
+
+    name: str
+    """The package name"""
+
+    version: str
+    """Package version"""
+
+    authors: List[str]
+    """Authors"""
+
+    description: str
+    """Package and release description"""
+
+    homepage: str
+    """Homepage of the project"""
+
+    license: str
+    """Package license"""
+
+    repository: str
+    """Source code repository"""
+
+
+@attr.s
+class CratesPackageInfo(BasePackageInfo):
+
+    name = attr.ib(type=str)
+    """Name of the package"""
+
+    version = attr.ib(type=str)
+    """Current version"""
+
+    e_metadata: Dict[str, Any] = attr.ib(factory=ExtrinsicPackageMetadata)
+    """Extrinsic package metadata, common to all versions"""
+
+    e_metadata_version: Dict[str, Any] = attr.ib(
+        factory=ExtrinsicVersionPackageMetadata
+    )
+    """Extrinsic package metadata specific to a version"""
+
+    i_metadata: Dict[str, Any] = attr.ib(factory=IntrinsicPackageMetadata)
+    """Intrinsic metadata of the current package version"""
+
+
+def extract_intrinsic_metadata(dir_path: Path) -> Dict[str, Any]:
+    """Extract intrinsic metadata from Cargo.toml file at dir_path.
+
+    Each crate archive has a Cargo.toml at the root of the archive.
+
+    Args:
+        dir_path: A directory on disk where a Cargo.toml must be present
+
+    Returns:
+        A dict mapping from toml parser
+    """
+    return toml.load(dir_path / "Cargo.toml")
+
+
+def extract_author(p_info: CratesPackageInfo) -> Person:
+    """Extract package author from intrinsic metadata and return it as a
+    `Person` model.
+
+    Args:
+        p_info: CratesPackageInfo that should contains i_metadata entries
+
+    Returns:
+        Only one author (Person) of the package. Currently limited by internal detail
+        of the swh stack (see T3887).
+    """
+    authors = p_info.i_metadata["authors"]
+    fullname = authors[0]  # TODO: here we have a list of author, see T3887
+    return Person.from_fullname(fullname.encode())
+
+
+def extract_description(p_info: CratesPackageInfo) -> str:
+    """Extract package description from intrinsic metadata and return it as a
+    string.
+
+    Args:
+        p_info: CratesPackageInfo that should contains i_metadata and entries
+
+    Returns:
+        Package description from metadata.
+    """
+    return p_info.i_metadata["description"]
+
+
+class CratesLoader(PackageLoader[CratesPackageInfo]):
+    """Load Crates package origins into swh archive."""
+
+    visit_type = "crates"
+
+    def __init__(
+        self,
+        storage: StorageInterface,
+        url: str,
+        package_name: str,
+        version: str,
+        checksum: Optional[str] = None,
+        max_content_size: Optional[int] = None,
+    ):
+        """Constructor
+
+        Args:
+
+            url : str
+                Origin url (e.g.
+                https://static.crates.io/crates/<name>/<name>-<version>.crate)
+
+            package_name : str
+                Crate package name
+
+            version : str
+                Crate package version
+
+            checksum : str, optional
+                Checksum for the package file to download
+        """
+        super().__init__(storage=storage, url=url, max_content_size=max_content_size)
+        self.name = package_name
+        self.provider_url = f"https://crates.io/api/v1/crates/{self.name}"
+        # Check consistency of name, version, url
+        filename = urlparse(url).path.split("/")[-1]
+        assert f"{self.name}-{version}.crate" == filename
+
+    @cached_method
+    def _raw_info(self) -> bytes:
+        """Get crate metadata (fetched from http api endpoint set as self.provider_url)
+
+        Returns:
+            Content response as bytes. Content response is a json document.
+        """
+        return api_info(self.provider_url)
+
+    @cached_method
+    def info(self) -> Dict:
+        """Parse http api json response and return the crate metadata information
+        as a Dict."""
+        return json.loads(self._raw_info())
+
+    def get_versions(self) -> Sequence[str]:
+        """Get all released versions of a crate
+
+        Returns:
+            A sequence of versions
+
+            Example::
+
+                ["0.1.1", "0.10.2"]
+        """
+        versions = [version["num"] for version in self.info()["versions"]]
+        versions.sort(key=StrictVersion)
+        return versions
+
+    def get_default_version(self) -> str:
+        """Get the newest release version of a crate
+
+        Returns:
+            A string representing a version
+
+            Example::
+
+                "0.1.2"
+        """
+        return self.info()["crate"]["newest_version"]
+
+    def get_package_info(self, version: str) -> Iterator[Tuple[str, CratesPackageInfo]]:
+        """Get release name and package information from version
+
+        Args:
+            version: crate version (e.g: "0.1.0")
+
+        Returns:
+            Iterator of tuple (release_name, p_info)
+        """
+        filename = f"{self.name}-{version}.crate"
+        url = f"https://static.crates.io/crates/{self.name}/{self.name}-{version}.crate"
+
+        # Get extrinsic metadata from http api
+
+        # Raw crate info
+        e_metadata = ExtrinsicPackageMetadata(**self.info())  # type: ignore[misc]
+        # Extract crate info for current version (One .crate file for a given version)
+        (crate_version,) = [
+            crate for crate in e_metadata["versions"] if crate["num"] == version
+        ]
+        e_metadata_version = ExtrinsicVersionPackageMetadata(  # type: ignore[misc]
+            **crate_version
+        )
+
+        p_info = CratesPackageInfo(
+            name=self.name,
+            filename=filename,
+            url=url,
+            version=version,
+            e_metadata=e_metadata,
+            e_metadata_version=e_metadata_version,
+        )
+        yield release_name(version, filename), p_info
+
+    def build_release(
+        self, p_info: CratesPackageInfo, uncompressed_path: str, directory: Sha1Git
+    ) -> Optional[Release]:
+        # Extract intrinsic metadata from dir_path/Cargo.toml
+        name = p_info.name
+        version = p_info.version
+        dir_path = Path(uncompressed_path, f"{name}-{version}")
+        i_metadata_raw = extract_intrinsic_metadata(dir_path)
+        # Get only corresponding key of IntrinsicPackageMetadata
+        i_metadata_keys = [k for k in IntrinsicPackageMetadata.__annotations__.keys()]
+        # We use data only from "package" entry
+
+        i_metadata = {
+            k: v for k, v in i_metadata_raw["package"].items() if k in i_metadata_keys
+        }
+        p_info.i_metadata = IntrinsicPackageMetadata(**i_metadata)  # type: ignore[misc]
+
+        author = extract_author(p_info)
+        description = extract_description(p_info)
+        message = (
+            f"Synthetic release for Crate source package {p_info.name} "
+            f"version {p_info.version}\n"
+            f"{description}\n"
+        )
+        # The only way to get a value for updated_at is through extrinsic metadata
+        updated_at = p_info.e_metadata_version.get("updated_at")
+
+        return Release(
+            name=version.encode(),
+            author=author,
+            date=TimestampWithTimezone.from_iso8601(updated_at),
+            message=message.encode(),
+            target_type=ObjectType.DIRECTORY,
+            target=directory,
+            synthetic=True,
+        )
diff --git a/swh/loader/package/crates/tasks.py b/swh/loader/package/crates/tasks.py
new file mode 100644
index 0000000..2d774c9
--- /dev/null
+++ b/swh/loader/package/crates/tasks.py
@@ -0,0 +1,16 @@
+# Copyright (C) 2022  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+from celery import shared_task
+
+from swh.loader.package.crates.loader import CratesLoader
+
+
+@shared_task(name=__name__ + ".LoadCrates")
+def load_crates(*, url=None, package_name: str, version: str, checksum=None):
+    """Load Rust crate package"""
+    return CratesLoader.from_configfile(
+        url=url, package_name=package_name, version=version, checksum=checksum
+    ).load()
diff --git a/swh/loader/package/crates/tests/__init__.py b/swh/loader/package/crates/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/swh/loader/package/crates/tests/data/fake_crates.sh b/swh/loader/package/crates/tests/data/fake_crates.sh
new file mode 100644
index 0000000..9bfff25
--- /dev/null
+++ b/swh/loader/package/crates/tests/data/fake_crates.sh
@@ -0,0 +1,259 @@
+#!/usr/bin/env bash
+
+# Script to generate fake crates files and fake http api response.
+
+set -euo pipefail
+
+# files and directories
+mkdir -p tmp_dir/crates/
+mkdir tmp_dir/crates/hg-core-0.0.1
+mkdir tmp_dir/crates/micro-timer-0.1.0
+mkdir tmp_dir/crates/micro-timer-0.1.1
+mkdir tmp_dir/crates/micro-timer-0.1.2
+mkdir tmp_dir/crates/micro-timer-0.2.0
+mkdir tmp_dir/crates/micro-timer-0.2.1
+mkdir tmp_dir/crates/micro-timer-0.3.0
+mkdir tmp_dir/crates/micro-timer-0.3.1
+mkdir tmp_dir/crates/micro-timer-0.4.0
+
+
+cd tmp_dir/crates/
+
+# Creates some <package>-<version>.crate file for test purposes.
+
+# hg-core-0.0.1/Cargo.toml
+echo -e '''[package]
+name = "hg-core"
+version = "0.0.1"
+authors = ["Georges Racinet <georges.racinet@octobus.net>"]
+description = "Mercurial pure Rust core library, with no assumption on Python bindings (FFI)"
+homepage = "https://mercurial-scm.org"
+license = "GPL-2.0-or-later"
+repository = "https://www.mercurial-scm.org/repo/hg"
+
+[lib]
+name = "hg"
+[dev-dependencies.rand]
+version = "~0.6"
+
+[dev-dependencies.rand_pcg]
+version = "~0.1"
+''' > hg-core-0.0.1/Cargo.toml
+
+# micro-timer-0.1.0/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.1.0"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://heptapod.octobus.net/Alphare/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://heptapod.octobus.net/Alphare/micro-timer"
+
+[lib]
+proc-macro = true
+[dependencies.quote]
+version = "1.0.2"
+
+[dependencies.syn]
+version = "1.0.16"
+features = ["full", "extra-traits"]
+[dev-dependencies.log]
+version = "0.4.8"
+''' > micro-timer-0.1.0/Cargo.toml
+
+# micro-timer-0.1.1/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.1.1"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://heptapod.octobus.net/Alphare/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://heptapod.octobus.net/Alphare/micro-timer"
+
+[lib]
+proc-macro = true
+[dependencies.quote]
+version = "1.0.2"
+
+[dependencies.syn]
+version = "1.0.16"
+features = ["full", "extra-traits"]
+[dev-dependencies.log]
+version = "0.4.8"
+''' > micro-timer-0.1.1/Cargo.toml
+
+# micro-timer-0.1.2/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.1.2"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://heptapod.octobus.net/Alphare/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://heptapod.octobus.net/Alphare/micro-timer"
+
+[lib]
+proc-macro = true
+[dependencies.proc-macro2]
+version = "1.0.9"
+
+[dependencies.quote]
+version = "1.0.2"
+
+[dependencies.syn]
+version = "1.0.16"
+features = ["full", "extra-traits"]
+[dev-dependencies.log]
+version = "0.4.8"
+
+[dev-dependencies.pretty_assertions]
+version = "0.6.1"
+''' > micro-timer-0.1.2/Cargo.toml
+
+# micro-timer-0.2.0/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.2.0"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://heptapod.octobus.net/Alphare/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://heptapod.octobus.net/Alphare/micro-timer"
+[dependencies.micro-timer-macros]
+version = "0.2.0"
+
+[dependencies.scopeguard]
+version = "1.1.0"
+[dev-dependencies.log]
+version = "0.4.8"
+''' > micro-timer-0.2.0/Cargo.toml
+
+# micro-timer-0.2.1/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.2.1"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://heptapod.octobus.net/Alphare/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://heptapod.octobus.net/Alphare/micro-timer"
+[dependencies.micro-timer-macros]
+version = "0.2.0"
+
+[dependencies.scopeguard]
+version = "1.1.0"
+[dev-dependencies.log]
+version = "0.4.8"
+''' > micro-timer-0.2.1/Cargo.toml
+
+# micro-timer-0.3.0/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.3.0"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://heptapod.octobus.net/Alphare/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://heptapod.octobus.net/Alphare/micro-timer"
+[dependencies.micro-timer-macros]
+version = "0.3.0"
+
+[dependencies.scopeguard]
+version = "1.1.0"
+[dev-dependencies.log]
+version = "0.4.8"
+''' > micro-timer-0.3.0/Cargo.toml
+
+# micro-timer-0.3.1/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.3.1"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://foss.heptapod.net/octobus/rust/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://foss.heptapod.net/octobus/rust/micro-timer"
+[dependencies.micro-timer-macros]
+version = "0.3.1"
+
+[dependencies.scopeguard]
+version = "1.1.0"
+[dev-dependencies.log]
+version = "0.4.8"
+''' > micro-timer-0.3.1/Cargo.toml
+
+# micro-timer-0.4.0/Cargo.toml
+echo -e '''[package]
+edition = "2018"
+name = "micro-timer"
+version = "0.4.0"
+authors = ["Raphaël Gomès <rgomes@octobus.net>"]
+description = "Dumb tiny logging timer"
+homepage = "https://foss.heptapod.net/octobus/rust/micro-timer"
+readme = "README.md"
+license-file = "LICENCE"
+repository = "https://foss.heptapod.net/octobus/rust/micro-timer"
+[dependencies.micro-timer-macros]
+version = "0.4.0"
+
+[dependencies.scopeguard]
+version = "1.1.0"
+[dev-dependencies.log]
+version = "0.4.8"
+''' > micro-timer-0.4.0/Cargo.toml
+
+# .crate file are tar.gz archive
+tar -czf hg-core-0.0.1.crate hg-core-0.0.1/
+tar -czf micro-timer-0.1.0.crate micro-timer-0.1.0/
+tar -czf micro-timer-0.1.1.crate micro-timer-0.1.1/
+tar -czf micro-timer-0.1.2.crate micro-timer-0.1.2/
+tar -czf micro-timer-0.2.0.crate micro-timer-0.2.0/
+tar -czf micro-timer-0.2.1.crate micro-timer-0.2.1/
+tar -czf micro-timer-0.3.0.crate micro-timer-0.3.0/
+tar -czf micro-timer-0.3.1.crate micro-timer-0.3.1/
+tar -czf micro-timer-0.4.0.crate micro-timer-0.4.0/
+
+# Copy and rename .crate file for usage with 'requests_mock_datadir'
+# See : https://docs.softwareheritage.org/devel/apidoc/swh.core.pytest_plugin.html#swh.core.pytest_plugin.requests_mock_datadir
+mkdir ../../https_static.crates.io
+
+cp hg-core-0.0.1.crate ../../https_static.crates.io/crates_hg-core_hg-core-0.0.1.crate
+cp micro-timer-0.1.0.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.1.0.crate
+cp micro-timer-0.1.1.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.1.1.crate
+cp micro-timer-0.1.2.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.1.2.crate
+cp micro-timer-0.2.0.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.2.0.crate
+cp micro-timer-0.2.1.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.2.1.crate
+cp micro-timer-0.3.0.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.3.0.crate
+cp micro-timer-0.3.1.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.3.1.crate
+cp micro-timer-0.4.0.crate ../../https_static.crates.io/crates_micro-timer_micro-timer-0.4.0.crate
+
+# Creates some http file response for test purposes.
+mkdir ../../https_crates.io
+
+# hg-core, https://crates.io/api/v1/crates/hg-core
+echo -e '''{"categories":[],"crate":{"badges":[],"categories":[],"created_at":"2019-04-16T18:48:11.404457+00:00","description":"Mercurial pure Rust core library, with no assumption on Python bindings (FFI)","documentation":null,"downloads":442,"exact_match":false,"homepage":"https://mercurial-scm.org","id":"hg-core","keywords":[],"links":{"owner_team":"/api/v1/crates/hg-core/owner_team","owner_user":"/api/v1/crates/hg-core/owner_user","owners":"/api/v1/crates/hg-core/owners","reverse_dependencies":"/api/v1/crates/hg-core/reverse_dependencies","version_downloads":"/api/v1/crates/hg-core/downloads","versions":null},"max_stable_version":"0.0.1","max_version":"0.0.1","name":"hg-core","newest_version":"0.0.1","recent_downloads":40,"repository":"https://www.mercurial-scm.org/repo/hg","updated_at":"2019-04-16T18:48:11.404457+00:00","versions":[145309]},"keywords":[],"versions":[{"audit_actions":[],"crate":"hg-core","crate_size":21344,"created_at":"2019-04-16T18:48:11.404457+00:00","dl_path":"/api/v1/crates/hg-core/0.0.1/download","downloads":442,"features":{},"id":145309,"license":"GPL-2.0-or-later","links":{"authors":"/api/v1/crates/hg-core/0.0.1/authors","dependencies":"/api/v1/crates/hg-core/0.0.1/dependencies","version_downloads":"/api/v1/crates/hg-core/0.0.1/downloads"},"num":"0.0.1","published_by":{"avatar":"https://avatars0.githubusercontent.com/u/474220?v=4","id":45544,"login":"gracinet","name":"Georges Racinet","url":"https://github.com/gracinet"},"readme_path":"/api/v1/crates/hg-core/0.0.1/readme","updated_at":"2019-04-16T18:48:11.404457+00:00","yanked":false}]}
+''' > ../../https_crates.io/api_v1_crates_hg-core
+
+# micro-timer, https://crates.io/api/v1/crates/micro-timer
+echo -e '''{"categories":[],"crate":{"badges":[],"categories":[],"created_at":"2020-02-27T14:31:49.131258+00:00","description":"Dumb tiny logging timer","documentation":null,"downloads":44245,"exact_match":false,"homepage":"https://foss.heptapod.net/octobus/rust/micro-timer","id":"micro-timer","keywords":[],"links":{"owner_team":"/api/v1/crates/micro-timer/owner_team","owner_user":"/api/v1/crates/micro-timer/owner_user","owners":"/api/v1/crates/micro-timer/owners","reverse_dependencies":"/api/v1/crates/micro-timer/reverse_dependencies","version_downloads":"/api/v1/crates/micro-timer/downloads","versions":null},"max_stable_version":"0.4.0","max_version":"0.4.0","name":"micro-timer","newest_version":"0.4.0","recent_downloads":3910,"repository":"https://foss.heptapod.net/octobus/rust/micro-timer","updated_at":"2020-09-28T13:40:49.593030+00:00","versions":[288167,254896,248120,223660,223652,216405,216156,216139]},"keywords":[],"versions":[{"audit_actions":[{"action":"publish","time":"2020-09-28T13:40:49.593030+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":3513,"created_at":"2020-09-28T13:40:49.593030+00:00","dl_path":"/api/v1/crates/micro-timer/0.4.0/download","downloads":337,"features":{},"id":288167,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.4.0/authors","dependencies":"/api/v1/crates/micro-timer/0.4.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.4.0/downloads"},"num":"0.4.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.4.0/readme","updated_at":"2020-09-28T13:40:49.593030+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-06-22T16:40:06.754009+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":3357,"created_at":"2020-06-22T16:40:06.754009+00:00","dl_path":"/api/v1/crates/micro-timer/0.3.1/download","downloads":37853,"features":{},"id":254896,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.3.1/authors","dependencies":"/api/v1/crates/micro-timer/0.3.1/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.3.1/downloads"},"num":"0.3.1","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.3.1/readme","updated_at":"2020-06-22T16:40:06.754009+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-06-02T11:38:33.047581+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":3306,"created_at":"2020-06-02T11:38:33.047581+00:00","dl_path":"/api/v1/crates/micro-timer/0.3.0/download","downloads":4163,"features":{},"id":248120,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.3.0/authors","dependencies":"/api/v1/crates/micro-timer/0.3.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.3.0/downloads"},"num":"0.3.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.3.0/readme","updated_at":"2020-06-02T11:38:33.047581+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-03-23T11:22:26.288804+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2937,"created_at":"2020-03-23T11:22:26.288804+00:00","dl_path":"/api/v1/crates/micro-timer/0.2.1/download","downloads":1301,"features":{},"id":223660,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.2.1/authors","dependencies":"/api/v1/crates/micro-timer/0.2.1/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.2.1/downloads"},"num":"0.2.1","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.2.1/readme","updated_at":"2020-03-23T11:22:26.288804+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-03-23T10:57:04.418462+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2941,"created_at":"2020-03-23T10:57:04.418462+00:00","dl_path":"/api/v1/crates/micro-timer/0.2.0/download","downloads":104,"features":{},"id":223652,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.2.0/authors","dependencies":"/api/v1/crates/micro-timer/0.2.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.2.0/downloads"},"num":"0.2.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.2.0/readme","updated_at":"2020-03-23T10:57:04.418462+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-02-27T23:35:41.872176+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":4927,"created_at":"2020-02-27T23:35:41.872176+00:00","dl_path":"/api/v1/crates/micro-timer/0.1.2/download","downloads":258,"features":{},"id":216405,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.1.2/authors","dependencies":"/api/v1/crates/micro-timer/0.1.2/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.1.2/downloads"},"num":"0.1.2","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.1.2/readme","updated_at":"2020-02-27T23:35:41.872176+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-02-27T15:17:53.486346+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2916,"created_at":"2020-02-27T15:17:53.486346+00:00","dl_path":"/api/v1/crates/micro-timer/0.1.1/download","downloads":111,"features":{},"id":216156,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.1.1/authors","dependencies":"/api/v1/crates/micro-timer/0.1.1/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.1.1/downloads"},"num":"0.1.1","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.1.1/readme","updated_at":"2020-02-27T15:17:53.486346+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-02-27T14:31:49.131258+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2902,"created_at":"2020-02-27T14:31:49.131258+00:00","dl_path":"/api/v1/crates/micro-timer/0.1.0/download","downloads":118,"features":{},"id":216139,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.1.0/authors","dependencies":"/api/v1/crates/micro-timer/0.1.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.1.0/downloads"},"num":"0.1.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.1.0/readme","updated_at":"2020-02-27T14:31:49.131258+00:00","yanked":false}]}
+''' > ../../https_crates.io/api_v1_crates_micro-timer
+
+# Clean up removing tmp_dir
+cd ../../
+rm -r tmp_dir/
diff --git a/swh/loader/package/crates/tests/data/https_crates.io/api_v1_crates_hg-core b/swh/loader/package/crates/tests/data/https_crates.io/api_v1_crates_hg-core
new file mode 100644
index 0000000..c76874d
--- /dev/null
+++ b/swh/loader/package/crates/tests/data/https_crates.io/api_v1_crates_hg-core
@@ -0,0 +1,2 @@
+{"categories":[],"crate":{"badges":[],"categories":[],"created_at":"2019-04-16T18:48:11.404457+00:00","description":"Mercurial pure Rust core library, with no assumption on Python bindings (FFI)","documentation":null,"downloads":442,"exact_match":false,"homepage":"https://mercurial-scm.org","id":"hg-core","keywords":[],"links":{"owner_team":"/api/v1/crates/hg-core/owner_team","owner_user":"/api/v1/crates/hg-core/owner_user","owners":"/api/v1/crates/hg-core/owners","reverse_dependencies":"/api/v1/crates/hg-core/reverse_dependencies","version_downloads":"/api/v1/crates/hg-core/downloads","versions":null},"max_stable_version":"0.0.1","max_version":"0.0.1","name":"hg-core","newest_version":"0.0.1","recent_downloads":40,"repository":"https://www.mercurial-scm.org/repo/hg","updated_at":"2019-04-16T18:48:11.404457+00:00","versions":[145309]},"keywords":[],"versions":[{"audit_actions":[],"crate":"hg-core","crate_size":21344,"created_at":"2019-04-16T18:48:11.404457+00:00","dl_path":"/api/v1/crates/hg-core/0.0.1/download","downloads":442,"features":{},"id":145309,"license":"GPL-2.0-or-later","links":{"authors":"/api/v1/crates/hg-core/0.0.1/authors","dependencies":"/api/v1/crates/hg-core/0.0.1/dependencies","version_downloads":"/api/v1/crates/hg-core/0.0.1/downloads"},"num":"0.0.1","published_by":{"avatar":"https://avatars0.githubusercontent.com/u/474220?v=4","id":45544,"login":"gracinet","name":"Georges Racinet","url":"https://github.com/gracinet"},"readme_path":"/api/v1/crates/hg-core/0.0.1/readme","updated_at":"2019-04-16T18:48:11.404457+00:00","yanked":false}]}
+
diff --git a/swh/loader/package/crates/tests/data/https_crates.io/api_v1_crates_micro-timer b/swh/loader/package/crates/tests/data/https_crates.io/api_v1_crates_micro-timer
new file mode 100644
index 0000000..e6878b6
--- /dev/null
+++ b/swh/loader/package/crates/tests/data/https_crates.io/api_v1_crates_micro-timer
@@ -0,0 +1,2 @@
+{"categories":[],"crate":{"badges":[],"categories":[],"created_at":"2020-02-27T14:31:49.131258+00:00","description":"Dumb tiny logging timer","documentation":null,"downloads":44245,"exact_match":false,"homepage":"https://foss.heptapod.net/octobus/rust/micro-timer","id":"micro-timer","keywords":[],"links":{"owner_team":"/api/v1/crates/micro-timer/owner_team","owner_user":"/api/v1/crates/micro-timer/owner_user","owners":"/api/v1/crates/micro-timer/owners","reverse_dependencies":"/api/v1/crates/micro-timer/reverse_dependencies","version_downloads":"/api/v1/crates/micro-timer/downloads","versions":null},"max_stable_version":"0.4.0","max_version":"0.4.0","name":"micro-timer","newest_version":"0.4.0","recent_downloads":3910,"repository":"https://foss.heptapod.net/octobus/rust/micro-timer","updated_at":"2020-09-28T13:40:49.593030+00:00","versions":[288167,254896,248120,223660,223652,216405,216156,216139]},"keywords":[],"versions":[{"audit_actions":[{"action":"publish","time":"2020-09-28T13:40:49.593030+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":3513,"created_at":"2020-09-28T13:40:49.593030+00:00","dl_path":"/api/v1/crates/micro-timer/0.4.0/download","downloads":337,"features":{},"id":288167,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.4.0/authors","dependencies":"/api/v1/crates/micro-timer/0.4.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.4.0/downloads"},"num":"0.4.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.4.0/readme","updated_at":"2020-09-28T13:40:49.593030+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-06-22T16:40:06.754009+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":3357,"created_at":"2020-06-22T16:40:06.754009+00:00","dl_path":"/api/v1/crates/micro-timer/0.3.1/download","downloads":37853,"features":{},"id":254896,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.3.1/authors","dependencies":"/api/v1/crates/micro-timer/0.3.1/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.3.1/downloads"},"num":"0.3.1","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.3.1/readme","updated_at":"2020-06-22T16:40:06.754009+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-06-02T11:38:33.047581+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":3306,"created_at":"2020-06-02T11:38:33.047581+00:00","dl_path":"/api/v1/crates/micro-timer/0.3.0/download","downloads":4163,"features":{},"id":248120,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.3.0/authors","dependencies":"/api/v1/crates/micro-timer/0.3.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.3.0/downloads"},"num":"0.3.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.3.0/readme","updated_at":"2020-06-02T11:38:33.047581+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-03-23T11:22:26.288804+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2937,"created_at":"2020-03-23T11:22:26.288804+00:00","dl_path":"/api/v1/crates/micro-timer/0.2.1/download","downloads":1301,"features":{},"id":223660,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.2.1/authors","dependencies":"/api/v1/crates/micro-timer/0.2.1/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.2.1/downloads"},"num":"0.2.1","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.2.1/readme","updated_at":"2020-03-23T11:22:26.288804+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-03-23T10:57:04.418462+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2941,"created_at":"2020-03-23T10:57:04.418462+00:00","dl_path":"/api/v1/crates/micro-timer/0.2.0/download","downloads":104,"features":{},"id":223652,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.2.0/authors","dependencies":"/api/v1/crates/micro-timer/0.2.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.2.0/downloads"},"num":"0.2.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.2.0/readme","updated_at":"2020-03-23T10:57:04.418462+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-02-27T23:35:41.872176+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":4927,"created_at":"2020-02-27T23:35:41.872176+00:00","dl_path":"/api/v1/crates/micro-timer/0.1.2/download","downloads":258,"features":{},"id":216405,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.1.2/authors","dependencies":"/api/v1/crates/micro-timer/0.1.2/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.1.2/downloads"},"num":"0.1.2","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.1.2/readme","updated_at":"2020-02-27T23:35:41.872176+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-02-27T15:17:53.486346+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2916,"created_at":"2020-02-27T15:17:53.486346+00:00","dl_path":"/api/v1/crates/micro-timer/0.1.1/download","downloads":111,"features":{},"id":216156,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.1.1/authors","dependencies":"/api/v1/crates/micro-timer/0.1.1/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.1.1/downloads"},"num":"0.1.1","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.1.1/readme","updated_at":"2020-02-27T15:17:53.486346+00:00","yanked":false},{"audit_actions":[{"action":"publish","time":"2020-02-27T14:31:49.131258+00:00","user":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"}}],"crate":"micro-timer","crate_size":2902,"created_at":"2020-02-27T14:31:49.131258+00:00","dl_path":"/api/v1/crates/micro-timer/0.1.0/download","downloads":118,"features":{},"id":216139,"license":"non-standard","links":{"authors":"/api/v1/crates/micro-timer/0.1.0/authors","dependencies":"/api/v1/crates/micro-timer/0.1.0/dependencies","version_downloads":"/api/v1/crates/micro-timer/0.1.0/downloads"},"num":"0.1.0","published_by":{"avatar":"https://avatars.githubusercontent.com/u/9445758?v=4","id":79957,"login":"Alphare","name":"Raphaël Gomès","url":"https://github.com/Alphare"},"readme_path":"/api/v1/crates/micro-timer/0.1.0/readme","updated_at":"2020-02-27T14:31:49.131258+00:00","yanked":false}]}
+
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_hg-core_hg-core-0.0.1.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_hg-core_hg-core-0.0.1.crate
new file mode 100644
index 0000000..e51e437
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_hg-core_hg-core-0.0.1.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.0.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.0.crate
new file mode 100644
index 0000000..dffc2fc
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.0.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.1.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.1.crate
new file mode 100644
index 0000000..6cc3eb6
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.1.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.2.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.2.crate
new file mode 100644
index 0000000..3a06370
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.1.2.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.2.0.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.2.0.crate
new file mode 100644
index 0000000..c304d04
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.2.0.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.2.1.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.2.1.crate
new file mode 100644
index 0000000..3d844f0
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.2.1.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.3.0.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.3.0.crate
new file mode 100644
index 0000000..ff91227
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.3.0.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.3.1.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.3.1.crate
new file mode 100644
index 0000000..fcbe142
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.3.1.crate differ
diff --git a/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.4.0.crate b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.4.0.crate
new file mode 100644
index 0000000..1b50fa5
Binary files /dev/null and b/swh/loader/package/crates/tests/data/https_static.crates.io/crates_micro-timer_micro-timer-0.4.0.crate differ
diff --git a/swh/loader/package/crates/tests/test_crates.py b/swh/loader/package/crates/tests/test_crates.py
new file mode 100644
index 0000000..e577462
--- /dev/null
+++ b/swh/loader/package/crates/tests/test_crates.py
@@ -0,0 +1,214 @@
+# Copyright (C) 2022  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+from swh.loader.package.crates.loader import CratesLoader
+from swh.loader.tests import assert_last_visit_matches, check_snapshot, get_stats
+from swh.model.hashutil import hash_to_bytes
+from swh.model.model import (
+    ObjectType,
+    Person,
+    Release,
+    Snapshot,
+    SnapshotBranch,
+    TargetType,
+    TimestampWithTimezone,
+)
+
+CRATES_EXTRA = [
+    {
+        "name": "hg-core",
+        "version": "0.0.1",
+        "url": "https://static.crates.io/crates/hg-core/hg-core-0.0.1.crate",
+        "checksum": "7fe168efadebadb9da6a329fdc027036e233b662285730cad27220e11e53c384",
+    },
+    {
+        "name": "micro-timer",
+        "version": "0.4.0",
+        "url": "https://static.crates.io/crates/micro-timer/micro-timer-0.4.0.crate",
+        "checksum": "5de32cb59a062672560d6f0842c4aa7714727457b9fe2daf8987d995a176a405",
+    },
+]
+
+
+def test_get_versions(requests_mock_datadir, swh_storage):
+    loader = CratesLoader(
+        swh_storage,
+        url=CRATES_EXTRA[1]["url"],
+        package_name=CRATES_EXTRA[1]["name"],
+        version=CRATES_EXTRA[1]["version"],
+    )
+    assert loader.get_versions() == [
+        "0.1.0",
+        "0.1.1",
+        "0.1.2",
+        "0.2.0",
+        "0.2.1",
+        "0.3.0",
+        "0.3.1",
+        "0.4.0",
+    ]
+
+
+def test_get_default_version(requests_mock_datadir, swh_storage):
+    loader = CratesLoader(
+        swh_storage,
+        url=CRATES_EXTRA[1]["url"],
+        package_name=CRATES_EXTRA[1]["name"],
+        version=CRATES_EXTRA[1]["version"],
+    )
+    assert loader.get_default_version() == "0.4.0"
+
+
+def test_crate_origin_not_found(swh_storage, requests_mock_datadir):
+    url = "https://nowhere-to-run/nowhere-to-hide-0.0.1.crate"
+    loader = CratesLoader(
+        swh_storage,
+        url,
+        package_name="nowhere-to-hide",
+        version="0.0.1",
+    )
+
+    assert loader.load() == {"status": "failed"}
+
+    assert_last_visit_matches(
+        swh_storage, url, status="not_found", type="crates", snapshot=None
+    )
+
+
+def test_crates_loader_load_one_version(datadir, requests_mock_datadir, swh_storage):
+    loader = CratesLoader(
+        swh_storage,
+        url=CRATES_EXTRA[0]["url"],
+        package_name=CRATES_EXTRA[0]["name"],
+        version=CRATES_EXTRA[0]["version"],
+    )
+    actual_load_status = loader.load()
+    assert actual_load_status["status"] == "eventful"
+    assert actual_load_status["snapshot_id"] is not None
+
+    expected_snapshot_id = "353cd6858c88ee8210432ea1098993c2e9966561"
+    expected_release_id = "d578833534017430f1b93eb741620899620c2505"
+
+    assert expected_snapshot_id == actual_load_status["snapshot_id"]
+
+    expected_snapshot = Snapshot(
+        id=hash_to_bytes(actual_load_status["snapshot_id"]),
+        branches={
+            b"releases/0.0.1/hg-core-0.0.1.crate": SnapshotBranch(
+                target=hash_to_bytes(expected_release_id),
+                target_type=TargetType.RELEASE,
+            ),
+            b"HEAD": SnapshotBranch(
+                target=b"releases/0.0.1/hg-core-0.0.1.crate",
+                target_type=TargetType.ALIAS,
+            ),
+        },
+    )
+    check_snapshot(expected_snapshot, swh_storage)
+
+    stats = get_stats(swh_storage)
+    assert {
+        "content": 1,
+        "directory": 2,
+        "origin": 1,
+        "origin_visit": 1,
+        "release": 1,
+        "revision": 0,
+        "skipped_content": 0,
+        "snapshot": 1,
+    } == stats
+
+    assert swh_storage.release_get([hash_to_bytes(expected_release_id)])[0] == Release(
+        name=b"0.0.1",
+        message=b"Synthetic release for Crate source package hg-core version "
+        b"0.0.1\nMercurial pure Rust core library, with no assumption "
+        b"on Python bindings (FFI)\n",
+        target=hash_to_bytes("674c3b0b54628d55b93a79dc7adf304efc01b371"),
+        target_type=ObjectType.DIRECTORY,
+        synthetic=True,
+        author=Person.from_fullname(b"Georges Racinet <georges.racinet@octobus.net>"),
+        date=TimestampWithTimezone.from_iso8601("2019-04-16T18:48:11.404457+00:00"),
+        id=hash_to_bytes(expected_release_id),
+    )
+
+
+def test_crates_loader_load_n_versions(datadir, requests_mock_datadir, swh_storage):
+    url = CRATES_EXTRA[1]["url"]
+    loader = CratesLoader(
+        swh_storage,
+        url=url,
+        package_name=CRATES_EXTRA[1]["name"],
+        version=CRATES_EXTRA[1]["version"],
+        checksum=CRATES_EXTRA[1]["checksum"],
+    )
+    actual_load_status = loader.load()
+    assert actual_load_status["status"] == "eventful"
+    assert actual_load_status["snapshot_id"] is not None
+
+    expected_snapshot_id = "016cbbe3bb78424c35b898015a2d80d79359e2ad"
+    assert expected_snapshot_id == actual_load_status["snapshot_id"]
+
+    expected_snapshot = Snapshot(
+        id=hash_to_bytes(expected_snapshot_id),
+        branches={
+            b"releases/0.4.0/micro-timer-0.4.0.crate": SnapshotBranch(
+                target=hash_to_bytes("3237c1174c4ccfa8e934d1bfd8d80b3a89760e39"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"releases/0.3.1/micro-timer-0.3.1.crate": SnapshotBranch(
+                target=hash_to_bytes("8b727a280051cdb90468ede2746e176e6fdf355f"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"releases/0.3.0/micro-timer-0.3.0.crate": SnapshotBranch(
+                target=hash_to_bytes("f45ec236ae50fb37e924a3d2cc093e72b6cbf1cd"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"releases/0.2.1/micro-timer-0.2.1.crate": SnapshotBranch(
+                target=hash_to_bytes("50a60a2c3696df7cd1b623bd7dbea2c89b994e42"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"releases/0.2.0/micro-timer-0.2.0.crate": SnapshotBranch(
+                target=hash_to_bytes("f0592dc0ae05399d872017d0260c45b875cb590e"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"releases/0.1.2/micro-timer-0.1.2.crate": SnapshotBranch(
+                target=hash_to_bytes("9220d7823fc40ab44e3ae3227522e7de672fad3e"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"releases/0.1.1/micro-timer-0.1.1.crate": SnapshotBranch(
+                target=hash_to_bytes("38529b7e355f79fdce31a3ba891e146174e10237"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"releases/0.1.0/micro-timer-0.1.0.crate": SnapshotBranch(
+                target=hash_to_bytes("5e5e6120af55b65c577e09331df54e70fad5e8b0"),
+                target_type=TargetType.RELEASE,
+            ),
+            b"HEAD": SnapshotBranch(
+                target=b"releases/0.4.0/micro-timer-0.4.0.crate",
+                target_type=TargetType.ALIAS,
+            ),
+        },
+    )
+
+    check_snapshot(expected_snapshot, swh_storage)
+
+    stats = get_stats(swh_storage)
+    assert {
+        "content": 8,
+        "directory": 16,
+        "origin": 1,
+        "origin_visit": 1,
+        "release": 8,
+        "revision": 0,
+        "skipped_content": 0,
+        "snapshot": 1,
+    } == stats
+
+    assert_last_visit_matches(
+        swh_storage,
+        url,
+        status="full",
+        type="crates",
+        snapshot=expected_snapshot.id,
+    )
diff --git a/swh/loader/package/crates/tests/test_tasks.py b/swh/loader/package/crates/tests/test_tasks.py
new file mode 100644
index 0000000..b38412f
--- /dev/null
+++ b/swh/loader/package/crates/tests/test_tasks.py
@@ -0,0 +1,25 @@
+# Copyright (C) 2022  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+
+def test_tasks_crates_loader(
+    mocker, swh_scheduler_celery_app, swh_scheduler_celery_worker, swh_config
+):
+    mock_load = mocker.patch("swh.loader.package.crates.loader.CratesLoader.load")
+    mock_load.return_value = {"status": "eventful"}
+
+    res = swh_scheduler_celery_app.send_task(
+        "swh.loader.package.crates.tasks.LoadCrates",
+        kwargs=dict(
+            url="some-url/crates/some-package/some-package-0.0.1.crate",
+            package_name="some-package",
+            version="0.0.1",
+        ),
+    )
+    assert res
+    res.wait()
+    assert res.successful()
+    assert mock_load.called
+    assert res.result == {"status": "eventful"}