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use std::{
borrow::Cow,
collections::{BTreeMap, BTreeSet},
marker::PhantomData,
sync::Arc,
};
use indexmap::IndexSet;
use itertools::Either;
use pep508_rs::ExtraName;
use rattler_conda_types::{PackageName, Platform, VersionWithSource};
use serde::{de::Error, Deserialize, Deserializer};
use serde_with::{serde_as, DeserializeAs};
use serde_yaml::Value;
use crate::{
file_format_version::FileFormatVersion,
parse::{models, models::v6, V5, V6},
Channel, CondaPackageData, EnvironmentData, EnvironmentPackageData, LockFile, LockFileInner,
ParseCondaLockError, PypiIndexes, PypiPackageData, PypiPackageEnvironmentData, SolveOptions,
UrlOrPath,
};
#[serde_as]
#[derive(Deserialize)]
#[serde(bound(deserialize = "P: DeserializeAs<'de, PackageData>"))]
struct DeserializableLockFile<P> {
environments: BTreeMap<String, DeserializableEnvironment>,
#[serde_as(as = "Vec<P>")]
packages: Vec<PackageData>,
#[serde(skip)]
_data: PhantomData<P>,
}
#[allow(clippy::large_enum_variant)]
enum PackageData {
Conda(CondaPackageData),
Pypi(PypiPackageData),
}
#[derive(Deserialize)]
struct DeserializableEnvironment {
channels: Vec<Channel>,
#[serde(flatten)]
indexes: Option<PypiIndexes>,
#[serde(default)]
options: SolveOptions,
packages: BTreeMap<Platform, Vec<DeserializablePackageSelector>>,
}
impl<'de> DeserializeAs<'de, PackageData> for V5 {
fn deserialize_as<D>(deserializer: D) -> Result<PackageData, D::Error>
where
D: Deserializer<'de>,
{
#[derive(Deserialize)]
#[serde(tag = "kind", rename_all = "snake_case")]
#[allow(clippy::large_enum_variant)]
enum Inner<'d> {
Conda(models::v5::CondaPackageDataModel<'d>),
Pypi(models::v5::PypiPackageDataModel<'d>),
}
Ok(match Inner::deserialize(deserializer)? {
Inner::Conda(c) => PackageData::Conda(c.into()),
Inner::Pypi(p) => PackageData::Pypi(p.into()),
})
}
}
impl<'de> DeserializeAs<'de, PackageData> for V6 {
fn deserialize_as<D>(deserializer: D) -> Result<PackageData, D::Error>
where
D: Deserializer<'de>,
{
#[derive(Deserialize)]
#[serde(untagged)]
enum Discriminant {
Conda {
#[serde(rename = "conda")]
_conda: String,
},
Pypi {
#[serde(rename = "pypi")]
_pypi: String,
},
}
let value = serde_value::Value::deserialize(deserializer)?;
let Ok(discriminant) = Discriminant::deserialize(
serde_value::ValueDeserializer::<D::Error>::new(value.clone()),
) else {
return Err(D::Error::custom(
"expected at least `conda` or `pypi` field",
));
};
let deserializer = serde_value::ValueDeserializer::<D::Error>::new(value);
Ok(match discriminant {
Discriminant::Conda { .. } => PackageData::Conda(
v6::CondaPackageDataModel::deserialize(deserializer)?
.try_into()
.map_err(D::Error::custom)?,
),
Discriminant::Pypi { .. } => {
PackageData::Pypi(v6::PypiPackageDataModel::deserialize(deserializer)?.into())
}
})
}
}
#[derive(Deserialize)]
#[serde(untagged, rename_all = "snake_case")]
#[allow(clippy::large_enum_variant)]
enum DeserializablePackageSelector {
Conda {
conda: UrlOrPath,
name: Option<PackageName>,
version: Option<VersionWithSource>,
build: Option<String>,
subdir: Option<String>,
},
Pypi {
pypi: UrlOrPath,
#[serde(flatten)]
runtime: DeserializablePypiPackageEnvironmentData,
},
}
#[derive(Hash, Deserialize, Eq, PartialEq)]
struct DeserializablePypiPackageEnvironmentData {
#[serde(default)]
extras: BTreeSet<ExtraName>,
}
impl From<DeserializablePypiPackageEnvironmentData> for PypiPackageEnvironmentData {
fn from(config: DeserializablePypiPackageEnvironmentData) -> Self {
Self {
extras: config.extras.into_iter().collect(),
}
}
}
/// Parses a [`LockFile`] from a [`serde_yaml::Value`].
pub fn parse_from_document_v5(
document: Value,
version: FileFormatVersion,
) -> Result<LockFile, ParseCondaLockError> {
let raw: DeserializableLockFile<V5> =
serde_yaml::from_value(document).map_err(ParseCondaLockError::ParseError)?;
parse_from_lock(version, raw)
}
pub fn parse_from_document_v6(
document: Value,
version: FileFormatVersion,
) -> Result<LockFile, ParseCondaLockError> {
let raw: DeserializableLockFile<V6> =
serde_yaml::from_value(document).map_err(ParseCondaLockError::ParseError)?;
parse_from_lock(version, raw)
}
fn parse_from_lock<P>(
file_version: FileFormatVersion,
raw: DeserializableLockFile<P>,
) -> Result<LockFile, ParseCondaLockError> {
// Split the packages into conda and pypi packages.
let mut conda_packages = Vec::new();
let mut pypi_packages = Vec::new();
for package in raw.packages {
match package {
PackageData::Conda(p) => conda_packages.push(p),
PackageData::Pypi(p) => pypi_packages.push(p),
}
}
// Determine the indices of the packages by url
let mut conda_url_lookup: ahash::HashMap<UrlOrPath, Vec<_>> = ahash::HashMap::default();
for (idx, conda_package) in conda_packages.iter().enumerate() {
conda_url_lookup
.entry(conda_package.location().clone())
.or_default()
.push(idx);
}
let pypi_url_lookup = pypi_packages
.iter()
.enumerate()
.map(|(idx, p)| (&p.location, idx))
.collect::<ahash::HashMap<_, _>>();
let mut pypi_runtime_lookup = IndexSet::new();
let environments = raw
.environments
.into_iter()
.map(|(environment_name, env)| {
Ok((
environment_name.clone(),
EnvironmentData {
channels: env.channels,
indexes: env.indexes,
options: env.options,
packages: env
.packages
.into_iter()
.map(|(platform, packages)| {
let packages = packages
.into_iter()
.map(|p| {
Ok(match p {
DeserializablePackageSelector::Conda {
conda,
name,
version,
build,
subdir,
} => {
let all_packages = conda_url_lookup
.get(&conda)
.map_or(&[] as &[usize], Vec::as_slice);
// Before V6 the package was selected by the first
// match. This is actually a bug because when parsing an
// older lock-file there can be more than one package
// with the same url. Instead, we should look at the
// subdir to disambiguate.
let package_index: Option<usize> = if file_version
< FileFormatVersion::V6
{
// Find the packages that match the subdir of
// this environment
let mut all_packages_with_subdir = all_packages
.iter()
.filter(|&idx| {
let conda_package = &conda_packages[*idx];
conda_package.record().subdir.as_str()
== platform.as_str()
})
.peekable();
// If there are no packages for the subdir, use all
// packages.
let mut matching_packages =
if all_packages_with_subdir.peek().is_some() {
Either::Left(all_packages_with_subdir)
} else {
Either::Right(all_packages.iter())
};
// Merge all matching packages.
if let Some(&first_package_idx) =
matching_packages.next()
{
let merged_package = Cow::Borrowed(
&conda_packages[first_package_idx],
);
let package = matching_packages.fold(
merged_package,
|acc, &next_package_idx| {
if let Cow::Owned(merged) = acc.merge(
&conda_packages[next_package_idx],
) {
Cow::Owned(merged)
} else {
acc
}
},
);
Some(match package {
Cow::Borrowed(_) => first_package_idx,
Cow::Owned(package) => {
conda_packages.push(package);
conda_packages.len() - 1
}
})
} else {
None
}
} else {
// Find the package that matches all the fields from
// the selector.
all_packages
.iter()
.find(|&idx| {
let conda_package = &conda_packages[*idx];
name.as_ref().is_none_or(|name| {
name == &conda_package.record().name
}) && version.as_ref().is_none_or(
|version| {
version
== &conda_package
.record()
.version
},
) && build.as_ref().is_none_or(|build| {
build == &conda_package.record().build
}) && subdir.as_ref().is_none_or(|subdir| {
subdir == &conda_package.record().subdir
})
})
.copied()
};
EnvironmentPackageData::Conda(
package_index.ok_or_else(|| {
ParseCondaLockError::MissingPackage(
environment_name.clone(),
platform,
conda,
)
})?,
)
}
DeserializablePackageSelector::Pypi { pypi, runtime } => {
EnvironmentPackageData::Pypi(
*pypi_url_lookup.get(&pypi).ok_or_else(|| {
ParseCondaLockError::MissingPackage(
environment_name.clone(),
platform,
pypi,
)
})?,
pypi_runtime_lookup.insert_full(runtime).0,
)
}
})
})
.collect::<Result<_, ParseCondaLockError>>()?;
Ok((platform, packages))
})
.collect::<Result<_, ParseCondaLockError>>()?,
},
))
})
.collect::<Result<BTreeMap<_, _>, ParseCondaLockError>>()?;
let (environment_lookup, environments) = environments
.into_iter()
.enumerate()
.map(|(idx, (name, env))| ((name, idx), env))
.unzip();
Ok(LockFile {
inner: Arc::new(LockFileInner {
version: file_version,
environments,
environment_lookup,
conda_packages,
pypi_packages,
pypi_environment_package_data: pypi_runtime_lookup
.into_iter()
.map(Into::into)
.collect(),
}),
})
}