Make filesystem types handle their path impl

Signed-off-by: Marcel Müller <neikos@neikos.email>

Cargo.toml

@@ -8,7 +8,7 @@ resolver = "2"
 unsafe_code = "forbid"
 
 [workspace.package]
-version = "0.0.0"
+version = "0.1.0"
 edition = "2021"
 description = "PLAIn teXT tools for your data"
 license = "EUPL-1.2"

crates/plaixt/Cargo.toml

@@ -14,10 +14,12 @@ jiff = "0.1.28"
 kdl.workspace = true
 miette = { version = "7.4.0", features = ["fancy", "syntect-highlighter"] }
 owo-colors = "4.1.0"
+paperless-rs = "0.1.5"
 tokio = { version = "1.43.0", features = ["full"] }
 tokio-stream = { version = "0.1.17", features = ["full"] }
 tracing = "0.1.41"
 tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
+trustfall = "0.8.1"
 
 [lints]
 workspace = true

crates/plaixt/src/adapter/adapter_impl.rs

@@ -0,0 +1,188 @@
+use std::collections::BTreeMap;
+use std::collections::BTreeSet;
+use std::sync::Arc;
+use std::sync::OnceLock;
+
+use paperless_rs::PaperlessClient;
+use tracing::debug;
+use trustfall::provider::resolve_coercion_using_schema;
+use trustfall::provider::resolve_property_with;
+use trustfall::provider::AsVertex;
+use trustfall::provider::ContextIterator;
+use trustfall::provider::ContextOutcomeIterator;
+use trustfall::provider::EdgeParameters;
+use trustfall::provider::ResolveEdgeInfo;
+use trustfall::provider::ResolveInfo;
+use trustfall::provider::Typename;
+use trustfall::provider::VertexIterator;
+use trustfall::FieldValue;
+use trustfall::Schema;
+
+use super::vertex::Vertex;
+use crate::parsing::DefinitionKind;
+use crate::parsing::Record;
+
+static SCHEMA: OnceLock<Schema> = OnceLock::new();
+
+#[non_exhaustive]
+pub struct Adapter {
+    schema: Arc<Schema>,
+    records: Vec<Record>,
+    definitions: Arc<BTreeMap<String, BTreeMap<String, DefinitionKind>>>,
+    paperless_client: Option<PaperlessClient>,
+    runtime_handle: tokio::runtime::Handle,
+}
+
+impl std::fmt::Debug for Adapter {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("Adapter").finish_non_exhaustive()
+    }
+}
+
+impl Adapter {
+    pub fn new(
+        schema: Schema,
+        records: Vec<Record>,
+        definitions: BTreeMap<String, BTreeMap<String, DefinitionKind>>,
+        paperless_client: Option<PaperlessClient>,
+        runtime: tokio::runtime::Handle,
+    ) -> Self {
+        Self {
+            schema: Arc::new(schema),
+            records,
+            definitions: Arc::new(definitions),
+            paperless_client,
+            runtime_handle: runtime,
+        }
+    }
+
+    pub const SCHEMA_TEXT: &'static str = include_str!("./schema.graphql");
+
+    pub fn schema() -> &'static Schema {
+        SCHEMA.get_or_init(|| Schema::parse(Self::SCHEMA_TEXT).expect("not a valid schema"))
+    }
+}
+
+impl<'a> trustfall::provider::Adapter<'a> for Adapter {
+    type Vertex = Vertex;
+
+    fn resolve_starting_vertices(
+        &self,
+        edge_name: &Arc<str>,
+        _parameters: &EdgeParameters,
+        resolve_info: &ResolveInfo,
+    ) -> VertexIterator<'a, Self::Vertex> {
+        match edge_name.as_ref() {
+            "Records" => super::entrypoints::records(resolve_info, &self.records),
+            _ => {
+                unreachable!(
+                    "attempted to resolve starting vertices for unexpected edge name: {edge_name}"
+                )
+            }
+        }
+    }
+
+    fn resolve_property<V: AsVertex<Self::Vertex> + 'a>(
+        &self,
+        contexts: ContextIterator<'a, V>,
+        type_name: &Arc<str>,
+        property_name: &Arc<str>,
+        resolve_info: &ResolveInfo,
+    ) -> ContextOutcomeIterator<'a, V, FieldValue> {
+        if property_name.as_ref() == "__typename" {
+            return resolve_property_with(contexts, |vertex| vertex.typename().into());
+        }
+
+        debug!(?type_name, ?property_name, "Resolving property");
+
+        match type_name.as_ref() {
+            "PaperlessDocument" => super::properties::resolve_paperless_document_property(
+                contexts,
+                property_name.as_ref(),
+                resolve_info,
+            ),
+            "Path" | "File" | "Directory" => super::properties::resolve_fs_property(
+                contexts,
+                type_name.as_ref(),
+                property_name.as_ref(),
+                resolve_info,
+            ),
+            "Record" => {
+                super::properties::resolve_record_property(contexts, property_name, resolve_info)
+            }
+            kind if kind.starts_with("p_") => {
+                super::properties::resolve_record_property(contexts, property_name, resolve_info)
+            }
+            _ => {
+                unreachable!(
+                    "attempted to read property '{property_name}' on unexpected type: {type_name}"
+                )
+            }
+        }
+    }
+
+    fn resolve_neighbors<V: AsVertex<Self::Vertex> + 'a>(
+        &self,
+        contexts: ContextIterator<'a, V>,
+        type_name: &Arc<str>,
+        edge_name: &Arc<str>,
+        parameters: &EdgeParameters,
+        resolve_info: &ResolveEdgeInfo,
+    ) -> ContextOutcomeIterator<'a, V, VertexIterator<'a, Self::Vertex>> {
+        match type_name.as_ref() {
+            "Directory" => super::edges::resolve_directory_edge(
+                contexts,
+                edge_name.as_ref(),
+                parameters,
+                resolve_info,
+            ),
+            kind if kind.starts_with("p_") => super::edges::resolve_record_edge(
+                contexts,
+                edge_name,
+                parameters,
+                resolve_info,
+                &self.definitions,
+            ),
+            _ => {
+                unreachable!(
+                    "attempted to resolve edge '{edge_name}' on unexpected type: {type_name}"
+                )
+            }
+        }
+    }
+
+    fn resolve_coercion<V: AsVertex<Self::Vertex> + 'a>(
+        &self,
+        contexts: ContextIterator<'a, V>,
+        type_name: &Arc<str>,
+        coerce_to_type: &Arc<str>,
+        _resolve_info: &ResolveInfo,
+    ) -> ContextOutcomeIterator<'a, V, bool> {
+        let schema = self.schema.clone();
+        let coerce_to_type = coerce_to_type.clone();
+        debug!(?coerce_to_type, ?type_name, "Trying to coerce");
+
+        Box::new(contexts.map(move |ctx| {
+            let subtypes: BTreeSet<_> = schema
+                .subtypes(coerce_to_type.as_ref())
+                .unwrap_or_else(|| panic!("type {coerce_to_type} is not part of this schema"))
+                .collect();
+
+            match ctx.active_vertex::<Vertex>() {
+                None => (ctx, false),
+                Some(vertex) => {
+                    let typename = vertex.typename();
+                    debug!(?coerce_to_type, ?vertex, "Trying to coerce");
+                    if let Some(rec) = vertex.as_record() {
+                        let is_rec = coerce_to_type.starts_with("p_");
+                        let is_kind = rec.kind == coerce_to_type.as_ref()[2..];
+                        (ctx, is_rec && is_kind)
+                    } else {
+                        let can_coerce = subtypes.contains(typename);
+                        (ctx, can_coerce)
+                    }
+                }
+            }
+        }))
+    }
+}

crates/plaixt/src/adapter/edges.rs

@@ -0,0 +1,96 @@
+use std::collections::BTreeMap;
+use std::sync::Arc;
+
+use camino::Utf8PathBuf;
+use trustfall::provider::resolve_neighbors_with;
+use trustfall::provider::AsVertex;
+use trustfall::provider::ContextIterator;
+use trustfall::provider::ContextOutcomeIterator;
+use trustfall::provider::EdgeParameters;
+use trustfall::provider::ResolveEdgeInfo;
+use trustfall::provider::VertexIterator;
+
+use super::Vertex;
+use crate::parsing::DefinitionKind;
+use crate::parsing::Record;
+
+pub(super) fn resolve_directory_edge<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    edge_name: &str,
+    _parameters: &EdgeParameters,
+    resolve_info: &ResolveEdgeInfo,
+) -> ContextOutcomeIterator<'a, V, VertexIterator<'a, Vertex>> {
+    match edge_name {
+        "Children" => directory::children(contexts, resolve_info),
+        _ => unreachable!("attempted to resolve unexpected edge '{edge_name}' on type 'Directory'"),
+    }
+}
+
+mod directory {
+    use camino::Utf8Path;
+    use trustfall::provider::resolve_neighbors_with;
+    use trustfall::provider::AsVertex;
+    use trustfall::provider::ContextIterator;
+    use trustfall::provider::ContextOutcomeIterator;
+    use trustfall::provider::ResolveEdgeInfo;
+    use trustfall::provider::VertexIterator;
+
+    use crate::adapter::Vertex;
+
+    pub(super) fn children<'a, V: AsVertex<Vertex> + 'a>(
+        contexts: ContextIterator<'a, V>,
+        _resolve_info: &ResolveEdgeInfo,
+    ) -> ContextOutcomeIterator<'a, V, VertexIterator<'a, Vertex>> {
+        resolve_neighbors_with(contexts, move |vertex| {
+            let vertex = vertex
+                .as_directory()
+                .expect("conversion failed, vertex was not a Directory");
+
+            fn read_children(path: &Utf8Path) -> Option<impl Iterator<Item = Vertex>> {
+                Some(
+                    path.read_dir_utf8()
+                        .ok()?
+                        .flat_map(|item| Some(Vertex::Path(item.ok()?.path().to_path_buf()))),
+                )
+            }
+
+            read_children(vertex)
+                .map(|i| {
+                    let it: Box<dyn Iterator<Item = Vertex>> = Box::new(i);
+                    it
+                })
+                .unwrap_or_else(|| Box::new(std::iter::empty()))
+        })
+    }
+}
+
+pub(super) fn resolve_record_edge<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    edge_name: &Arc<str>,
+    _parameters: &EdgeParameters,
+    _resolve_info: &ResolveEdgeInfo,
+    definitions: &Arc<BTreeMap<String, BTreeMap<String, DefinitionKind>>>,
+) -> ContextOutcomeIterator<'a, V, VertexIterator<'a, Vertex>> {
+    let edge_name = edge_name.clone();
+    let definitions = definitions.clone();
+    resolve_neighbors_with(contexts, move |v| {
+        let rec = v.as_record().expect("Expected a record");
+        let def = &definitions[&rec.kind][edge_name.as_ref()];
+
+        match def {
+            DefinitionKind::Path => Box::new(std::iter::once(path_from_rec(rec, &edge_name))),
+            _ => unreachable!("Only `Path` can appear as edge for now"),
+        }
+    })
+}
+
+fn path_from_rec(rec: &Record, edge_name: &str) -> Vertex {
+    let pathb = Utf8PathBuf::from(rec.fields[edge_name].as_string().unwrap());
+    if pathb.is_file() {
+        Vertex::File(pathb)
+    } else if pathb.is_dir() {
+        Vertex::Directory(pathb)
+    } else {
+        Vertex::Path(pathb)
+    }
+}

crates/plaixt/src/adapter/entrypoints.rs

@@ -0,0 +1,16 @@
+use trustfall::provider::ResolveInfo;
+use trustfall::provider::VertexIterator;
+
+use super::vertex::Vertex;
+use crate::parsing::Record;
+
+pub(super) fn records<'a>(
+    _resolve_info: &ResolveInfo,
+    records: &'_ [Record],
+) -> VertexIterator<'a, Vertex> {
+    #[expect(
+        clippy::unnecessary_to_owned,
+        reason = "We have to go through a vec to satisfy the lifetimes"
+    )]
+    Box::new(records.to_vec().into_iter().map(Vertex::Record))
+}

crates/plaixt/src/adapter/mod.rs

@@ -0,0 +1,55 @@
+mod adapter_impl;
+mod edges;
+mod entrypoints;
+mod properties;
+mod vertex;
+
+#[cfg(test)]
+mod tests;
+
+pub use adapter_impl::Adapter;
+use tracing::trace;
+use trustfall::Schema;
+pub use vertex::Vertex;
+
+pub struct CustomVertex {
+    pub name: String,
+    pub definition: String,
+}
+
+impl crate::parsing::Definition {
+    fn to_custom_vertices(&self) -> Vec<CustomVertex> {
+        let name = format!("p_{}", self.name);
+
+        let fields = self
+            .fields
+            .iter()
+            .map(|(fname, ftype)| {
+                let kind = ftype.trustfall_kind(&format!("{name}{fname}"));
+                format!("{fname}: {kind}")
+            })
+            .chain([String::from("_at: String!"), String::from("_kind: String!")])
+            .collect::<Vec<_>>();
+
+        let definition = format!("type {name} implements Record {{ {} }}", fields.join(","));
+
+        [CustomVertex { name, definition }].into_iter().collect()
+    }
+}
+
+pub(crate) fn to_schema(
+    definitions: &std::collections::BTreeMap<String, Vec<crate::parsing::Definition>>,
+) -> trustfall::Schema {
+    let base_text = Adapter::SCHEMA_TEXT;
+
+    let generated = definitions
+        .values()
+        .flat_map(|defs| defs.last().unwrap().to_custom_vertices())
+        .map(|v| v.definition)
+        .collect::<Vec<_>>()
+        .join("\n");
+
+    let input = format!("{base_text}{generated}");
+    trace!(%input, "Using schema");
+    Schema::parse(input).unwrap()
+}

crates/plaixt/src/adapter/properties.rs

@@ -0,0 +1,180 @@
+use std::sync::Arc;
+
+use kdl::KdlValue;
+use trustfall::provider::field_property;
+use trustfall::provider::resolve_property_with;
+use trustfall::provider::AsVertex;
+use trustfall::provider::ContextIterator;
+use trustfall::provider::ContextOutcomeIterator;
+use trustfall::provider::ResolveInfo;
+use trustfall::FieldValue;
+
+use super::vertex::Vertex;
+
+pub(super) fn resolve_fs_property<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    type_name: &str,
+    property_name: &str,
+    resolve_info: &ResolveInfo,
+) -> ContextOutcomeIterator<'a, V, FieldValue> {
+    match (type_name, property_name) {
+        (_, "exists" | "basename" | "path") => {
+            resolve_path_property(contexts, property_name, resolve_info)
+        }
+        ("Directory", _) => resolve_directory_property(contexts, property_name, resolve_info),
+        ("File", _) => resolve_file_property(contexts, property_name, resolve_info),
+        _ => {
+            unreachable!(
+                "attempted to read unexpected property '{property_name}' on type '{type_name}'"
+            )
+        }
+    }
+}
+
+pub(super) fn resolve_path_property<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    property_name: &str,
+    _resolve_info: &ResolveInfo,
+) -> ContextOutcomeIterator<'a, V, FieldValue> {
+    match property_name {
+        "exists" => resolve_property_with(contexts, move |v: &Vertex| match v {
+            Vertex::Path(p) | Vertex::File(p) | Vertex::Directory(p) => p.exists().into(),
+            _ => {
+                panic!("Vertex was not a filesystem type")
+            }
+        }),
+        "basename" => resolve_property_with(contexts, move |v: &Vertex| match v {
+            Vertex::Path(p) | Vertex::File(p) | Vertex::Directory(p) => p.file_name().into(),
+            _ => {
+                panic!("Vertex was not a filesystem type")
+            }
+        }),
+        "path" => resolve_property_with(contexts, move |v: &Vertex| match v {
+            Vertex::Path(p) | Vertex::File(p) | Vertex::Directory(p) => p.to_string().into(),
+            _ => {
+                panic!("Vertex was not a filesystem type")
+            }
+        }),
+        _ => {
+            unreachable!("attempted to read unexpected property '{property_name}' on type 'Path'")
+        }
+    }
+}
+
+pub(super) fn resolve_directory_property<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    property_name: &str,
+    _resolve_info: &ResolveInfo,
+) -> ContextOutcomeIterator<'a, V, FieldValue> {
+    match property_name {
+        "exists" => resolve_property_with(contexts, move |v: &Vertex| {
+            let directory = v.as_directory().expect("vertex was not a Directory");
+
+            directory.exists().into()
+        }),
+        "basename" => resolve_property_with(contexts, move |v: &Vertex| {
+            let directory = v.as_directory().expect("vertex was not a Directory");
+
+            directory.file_name().into()
+        }),
+        "path" => resolve_property_with(contexts, move |v: &Vertex| {
+            let directory = v.as_directory().expect("vertex was not a Directory");
+
+            directory.to_string().into()
+        }),
+        _ => {
+            unreachable!("attempted to read unexpected property '{property_name}' on type 'File'")
+        }
+    }
+}
+
+pub(super) fn resolve_file_property<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    property_name: &str,
+    _resolve_info: &ResolveInfo,
+) -> ContextOutcomeIterator<'a, V, FieldValue> {
+    match property_name {
+        "exists" => resolve_property_with(contexts, move |v: &Vertex| {
+            let file = v.as_file().expect("vertex was not a File");
+
+            file.exists().into()
+        }),
+        "basename" => resolve_property_with(contexts, move |v: &Vertex| {
+            let file = v.as_file().expect("vertex was not a File");
+
+            file.file_name().into()
+        }),
+        "path" => resolve_property_with(contexts, move |v: &Vertex| {
+            let file = v.as_file().expect("vertex was not a File");
+
+            file.to_string().into()
+        }),
+        "extension" => resolve_property_with(contexts, move |v: &Vertex| {
+            let file = v.as_file().expect("vertex was not a File");
+
+            file.extension().into()
+        }),
+        _ => {
+            unreachable!("attempted to read unexpected property '{property_name}' on type 'File'")
+        }
+    }
+}
+
+pub(super) fn resolve_paperless_document_property<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    property_name: &str,
+    _resolve_info: &ResolveInfo,
+) -> ContextOutcomeIterator<'a, V, FieldValue> {
+    match property_name {
+        "added" => resolve_property_with(contexts, field_property!(as_paperless_document, added)),
+        "archive_serial_number" => resolve_property_with(
+            contexts,
+            field_property!(as_paperless_document, archive_serial_number),
+        ),
+        "content" => {
+            resolve_property_with(contexts, field_property!(as_paperless_document, content))
+        }
+        "created" => {
+            resolve_property_with(contexts, field_property!(as_paperless_document, created))
+        }
+        "id" => resolve_property_with(contexts, field_property!(as_paperless_document, id)),
+        "title" => resolve_property_with(contexts, field_property!(as_paperless_document, title)),
+        _ => {
+            unreachable!(
+                "attempted to read unexpected property '{property_name}' on type 'PaperlessDocument'"
+            )
+        }
+    }
+}
+
+pub(super) fn resolve_record_property<'a, V: AsVertex<Vertex> + 'a>(
+    contexts: ContextIterator<'a, V>,
+    property_name: &Arc<str>,
+    _resolve_info: &ResolveInfo,
+) -> ContextOutcomeIterator<'a, V, FieldValue> {
+    let property_name = property_name.clone();
+    match property_name.as_ref() {
+        "_at" => resolve_property_with(
+            contexts,
+            field_property!(as_record, at, { at.to_string().into() }),
+        ),
+        "_kind" => resolve_property_with(contexts, field_property!(as_record, kind)),
+        _ => resolve_property_with(contexts, move |v: &Vertex| {
+            let rec = v
+                .as_record()
+                .expect("Called record property without it being a record");
+
+            kdl_to_trustfall_value(rec.fields[property_name.as_ref()].clone())
+        }),
+    }
+}
+
+fn kdl_to_trustfall_value(val: KdlValue) -> FieldValue {
+    match val {
+        KdlValue::Bool(b) => FieldValue::Boolean(b),
+        KdlValue::Float(f) => FieldValue::Float64(f),
+        KdlValue::Null => FieldValue::Null,
+        KdlValue::Integer(i) => FieldValue::Int64(i.try_into().unwrap()),
+        KdlValue::String(s) => FieldValue::String(s.into()),
+    }
+}

crates/plaixt/src/adapter/schema.graphql

@@ -0,0 +1,88 @@
+schema {
+    query: RootSchemaQuery
+}
+
+directive @filter(
+    """
+    Name of the filter operation to perform.
+    """
+    op: String!
+    """
+    List of string operands for the operator.
+    """
+    value: [String!]
+) repeatable on FIELD | INLINE_FRAGMENT
+directive @tag(
+    """
+    Name to apply to the given property field.
+    """
+    name: String
+) on FIELD
+directive @output(
+    """
+    What to designate the output field generated from this property field.
+    """
+    name: String
+) on FIELD
+directive @optional on FIELD
+directive @recurse(
+    """
+    Recurse up to this many times on this edge. A depth of 1 produces the current
+    vertex and its immediate neighbors along the given edge.
+    """
+    depth: Int!
+) on FIELD
+directive @fold on FIELD
+directive @transform(
+    """
+    Name of the transformation operation to perform.
+    """
+    op: String!
+) on FIELD
+
+
+"""
+All the possible data types to begin querying
+"""
+type RootSchemaQuery {
+    """
+    All records in your plaixt instance
+    """
+    Records: [Record!]!
+}
+
+interface Record {
+    _kind: String!
+    _at: String!
+}
+
+interface Path {
+    path: String!
+    exists: Boolean!
+    basename: String!
+}
+
+interface File implements Path {
+    path: String!
+    exists: Boolean!
+    basename: String!
+
+    extension: String!
+}
+
+type Directory implements Path {
+    path: String!
+    exists: Boolean!
+    basename: String!
+
+    Children: [Path!]!
+}
+
+type PaperlessDocument {
+    id: Int!
+    title: String!
+    content: String!
+    archive_serial_number: Int
+    created: String!
+    added: String!
+}

crates/plaixt/src/adapter/tests.rs

@@ -0,0 +1,16 @@
+use trustfall::provider::check_adapter_invariants;
+
+use super::Adapter;
+
+#[tokio::test]
+async fn adapter_satisfies_trustfall_invariants() {
+    let schema = Adapter::schema();
+    let adapter = Adapter::new(
+        schema.clone(),
+        vec![],
+        [].into(),
+        None,
+        tokio::runtime::Handle::current(),
+    );
+    check_adapter_invariants(schema, adapter);
+}

crates/plaixt/src/adapter/vertex.rs

@@ -0,0 +1,15 @@
+use camino::Utf8PathBuf;
+use paperless_rs::endpoint::documents::Document as PaperlessDocument;
+
+use crate::parsing::Record;
+
+#[non_exhaustive]
+#[derive(Debug, Clone, trustfall::provider::TrustfallEnumVertex)]
+pub enum Vertex {
+    Path(Utf8PathBuf),
+    File(Utf8PathBuf),
+    Directory(Utf8PathBuf),
+
+    PaperlessDocument(PaperlessDocument),
+    Record(Record),
+}

crates/plaixt/src/config.rs

@@ -0,0 +1,39 @@
+use camino::Utf8Path;
+use camino::Utf8PathBuf;
+use kdl::KdlDocument;
+use miette::Context;
+use miette::LabeledSpan;
+
+#[derive(Debug)]
+pub struct Config {
+    pub(crate) root_folder: Utf8PathBuf,
+}
+
+pub(crate) async fn parse_config(path: &Utf8Path) -> miette::Result<Config> {
+    let data = tokio::fs::read_to_string(path)
+        .await
+        .map_err(|e| miette::miette!(e))
+        .wrap_err_with(|| miette::miette!("Could not read configuration at \"{path}\""))?;
+
+    let doc: KdlDocument = data
+        .parse()
+        .map_err(|e| miette::Error::from(e).with_source_code(data.clone()))?;
+
+    Ok(Config {
+        root_folder: doc
+            .get("root_folder")
+            .ok_or_else(|| miette::miette!("\"root_folder\" configuration value not found"))
+            .and_then(|val| {
+                val.get(0)
+                    .and_then(|v| v.as_string().map(Into::into))
+                    .ok_or_else(|| {
+                        miette::diagnostic!(
+                            labels = vec![LabeledSpan::new_primary_with_span(None, val.span())],
+                            "root_folder is expected to be a path"
+                        )
+                        .into()
+                    })
+                    .map_err(|e: miette::Report| e.with_source_code(data))
+            })?,
+    })
+}

crates/plaixt/src/main.rs

@@ -1,16 +1,24 @@
 #![allow(dead_code)]
 
-use camino::Utf8Path;
+use std::collections::BTreeMap;
+use std::io::Read;
+use std::sync::Arc;
+
 use camino::Utf8PathBuf;
 use clap::Parser;
 use clap::Subcommand;
 use clap::ValueHint;
 use human_panic::Metadata;
-use kdl::KdlDocument;
-use miette::LabeledSpan;
-use miette::WrapErr;
+use miette::IntoDiagnostic;
+use parsing::Definition;
+use parsing::Record;
 use tracing::info;
+use tracing_subscriber::EnvFilter;
+use trustfall::execute_query;
+use trustfall::FieldValue;
 
+mod adapter;
+mod config;
 mod parsing;
 
 #[derive(Debug, Parser)]
@@ -33,11 +41,7 @@ struct Args {
 #[derive(Debug, Subcommand)]
 enum ArgMode {
     Dump,
-}
-
-#[derive(Debug)]
-pub struct Config {
-    root_folder: Utf8PathBuf,
+    Query,
 }
 
 #[tokio::main]
@@ -47,54 +51,107 @@ async fn main() -> miette::Result<()> {
             .authors(env!("CARGO_PKG_AUTHORS"))
     );
 
-    tracing_subscriber::fmt().pretty().init();
+    tracing_subscriber::fmt()
+        .with_env_filter(EnvFilter::from_default_env())
+        .pretty()
+        .init();
 
     let args = Args::parse();
 
-    let config = parse_config(&args.config).await?;
+    let config = config::parse_config(&args.config).await?;
     let root_folder = args.root_folder.as_ref().unwrap_or(&config.root_folder);
 
-    let load_records = async {
-        let definitions = parsing::load_definitions(&root_folder.join("definitions")).await?;
-        parsing::load_records(root_folder, &definitions).await
-    };
+    let definitions = parsing::load_definitions(&root_folder.join("definitions")).await?;
+
+    let records = parsing::load_records(root_folder, &definitions).await?;
+
+    let (schema, adapter) = get_schema_and_adapter(&definitions, records.clone());
 
     match args.mode {
-        ArgMode::Dump => {
-            let records = load_records.await?;
+        ArgMode::Query => {
+            let mut query = String::new();
+            std::io::stdin()
+                .read_to_string(&mut query)
+                .into_diagnostic()?;
 
-            info!("Got records: {records:#?}");
+            let result = execute_query(
+                &schema,
+                Arc::new(adapter),
+                &query,
+                BTreeMap::<Arc<str>, FieldValue>::from([]),
+            )
+            .unwrap()
+            .collect::<Vec<_>>();
+
+            info!("Got records: {result:#?}");
+        }
+        ArgMode::Dump => {
+            print_records(&records);
         }
     }
 
     Ok(())
 }
 
-async fn parse_config(path: &Utf8Path) -> miette::Result<Config> {
-    let data = tokio::fs::read_to_string(path)
-        .await
-        .map_err(|e| miette::miette!(e))
-        .wrap_err_with(|| miette::miette!("Could not read configuration at \"{path}\""))?;
-
-    let doc: KdlDocument = data
-        .parse()
-        .map_err(|e| miette::Error::from(e).with_source_code(data.clone()))?;
-
-    Ok(Config {
-        root_folder: doc
-            .get("root_folder")
-            .ok_or_else(|| miette::miette!("\"root_folder\" configuration value not found"))
-            .and_then(|val| {
-                val.get(0)
-                    .and_then(|v| v.as_string().map(Into::into))
-                    .ok_or_else(|| {
-                        miette::diagnostic!(
-                            labels = vec![LabeledSpan::new_primary_with_span(None, val.span())],
-                            "root_folder is expected to be a path"
-                        )
-                        .into()
-                    })
-                    .map_err(|e: miette::Report| e.with_source_code(data))
-            })?,
-    })
+fn get_schema_and_adapter(
+    definitions: &BTreeMap<String, Vec<Definition>>,
+    records: Vec<Record>,
+) -> (trustfall::Schema, adapter::Adapter) {
+    let schema = adapter::to_schema(definitions);
+    let definitions = definitions
+        .iter()
+        .map(|(name, def)| (name.clone(), def.last().cloned().unwrap().fields))
+        .collect();
+    let adapter = adapter::Adapter::new(
+        schema.clone(),
+        records,
+        definitions,
+        None,
+        tokio::runtime::Handle::current(),
+    );
+    (schema, adapter)
+}
+
+fn print_records(records: &[Record]) {
+    for record in records {
+        println!("{kind} @ {at} {{", kind = record.kind, at = record.at);
+        for field in &record.fields {
+            println!("\t{name} = {value}", name = field.0, value = field.1);
+        }
+        println!("}}")
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use camino::Utf8PathBuf;
+    use tracing_subscriber::EnvFilter;
+    use trustfall::provider::check_adapter_invariants;
+
+    use crate::get_schema_and_adapter;
+    use crate::parsing;
+
+    #[tokio::test]
+    async fn ensure_adapter_satisfies_invariants() {
+        tracing_subscriber::fmt()
+            .with_env_filter(EnvFilter::from_default_env())
+            .pretty()
+            .with_test_writer()
+            .init();
+
+        let root_folder = Utf8PathBuf::from(env!("CARGO_MANIFEST_DIR")).join("../../examples");
+
+        println!("{root_folder}");
+        let definitions = parsing::load_definitions(&root_folder.join("definitions"))
+            .await
+            .unwrap();
+
+        let records = parsing::load_records(&root_folder, &definitions)
+            .await
+            .unwrap();
+
+        let (schema, adapter) = get_schema_and_adapter(&definitions, records.clone());
+
+        check_adapter_invariants(&schema, adapter);
+    }
 }

crates/plaixt/src/parsing.rs

@@ -1,5 +1,4 @@
 use std::collections::BTreeMap;
-use std::collections::HashMap;
 
 use camino::Utf8Path;
 use camino::Utf8PathBuf;
@@ -15,7 +14,7 @@ use miette::NamedSource;
 use owo_colors::OwoColorize;
 use tokio_stream::wrappers::ReadDirStream;
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Record {
     pub(crate) kind: String,
     pub(crate) at: Timestamp,
@@ -82,8 +81,7 @@ pub(crate) fn parse_record(
             .map(|field| {
                 let Some(get) = field.get(0) else {
                     return Err(miette::diagnostic!(
-                        labels =
-                            vec![LabeledSpan::new_primary_with_span(None, at_entry.span())],
+                        labels = vec![LabeledSpan::new_primary_with_span(None, at_entry.span())],
                         "This datetime should be a string formatted as RFC3339."
                     ))?;
                 };
@@ -143,9 +141,8 @@ pub(crate) async fn load_records(
         })
         .flat_map(|val| futures::stream::iter(val.transpose()))
         .and_then(|(name, bytes)| async move {
-            parse_record(&bytes, definitions).map_err(|e| {
-                e.with_source_code(NamedSource::new(name, bytes).with_language("kdl"))
-            })
+            parse_record(&bytes, definitions)
+                .map_err(|e| e.with_source_code(NamedSource::new(name, bytes).with_language("kdl")))
         })
         .map(|val| val.map(|recs| futures::stream::iter(recs).map(Ok::<_, miette::Report>)))
         .try_flatten()
@@ -155,19 +152,32 @@ pub(crate) async fn load_records(
     Ok(defs)
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub enum DefinitionKind {
     String,
+    Path,
     OneOf(Vec<String>),
 }
 
 impl DefinitionKind {
+    pub(crate) fn trustfall_kind(&self, _namespace: &str) -> String {
+        match self {
+            DefinitionKind::String => String::from("String!"),
+            DefinitionKind::Path => String::from("Path!"),
+            DefinitionKind::OneOf(_vecs) => String::from("String!"),
+        }
+    }
+
     pub(crate) fn validate(&self, val: &KdlValue) -> Result<(), String> {
         match self {
             DefinitionKind::String => val
                 .is_string()
                 .then_some(())
                 .ok_or("Expected a string here".to_string()),
+            DefinitionKind::Path => val
+                .is_string()
+                .then_some(())
+                .ok_or("Expected a path encoded as a string here".to_string()),
             DefinitionKind::OneOf(options) => val
                 .as_string()
                 .is_some_and(|val| options.iter().any(|o| o == val))
@@ -175,6 +185,23 @@ impl DefinitionKind {
                 .ok_or_else(|| format!("Expected one of: {}", options.join(", "))),
         }
     }
+
+    pub(crate) fn extra_trustfall_kinds(
+        &self,
+        namespace: &str,
+    ) -> Vec<crate::adapter::CustomVertex> {
+        match self {
+            DefinitionKind::OneOf(defs) => {
+                let name = format!("{namespace}Def");
+                let vec = vec![crate::adapter::CustomVertex {
+                    definition: format!("enum {name} {{ {} }}", defs.join(",")),
+                    name,
+                }];
+                vec
+            }
+            _ => vec![],
+        }
+    }
 }
 
 impl TryFrom<&str> for DefinitionKind {
@@ -182,18 +209,23 @@ impl TryFrom<&str> for DefinitionKind {
     fn try_from(value: &str) -> Result<Self, Self::Error> {
         match value.to_ascii_lowercase().as_str() {
             "string" => Ok(DefinitionKind::String),
+            "path" => Ok(DefinitionKind::Path),
             other => miette::bail!("Did not recognize valid field kind: \"{other}\""),
         }
     }
 }
 
-#[derive(Debug)]
+#[derive(Debug, Clone)]
 pub struct Definition {
+    pub(crate) name: String,
     pub(crate) since: Timestamp,
-    pub(crate) fields: HashMap<String, DefinitionKind>,
+    pub(crate) fields: BTreeMap<String, DefinitionKind>,
 }
 
-pub(crate) fn parse_definition(bytes: &str) -> miette::Result<Vec<Definition>> {
+pub(crate) fn parse_definition(
+    bytes: &str,
+    definition_name: String,
+) -> miette::Result<Vec<Definition>> {
     let doc: KdlDocument = bytes.parse()?;
 
     let mut defs = vec![];
@@ -288,11 +320,27 @@ pub(crate) fn parse_definition(bytes: &str) -> miette::Result<Vec<Definition>> {
                             }
                         };
 
+                        match field.name().value() {
+                            "at" | "kind" => return Err(miette::diagnostic!(
+                                    labels = vec![LabeledSpan::new_primary_with_span(
+                                        Some(String::from("this name")),
+                                        field.name().span()
+                                    )],
+                                    help = "Both `at` and `kind` are reserved field names.",
+                                    "Reserved field name."
+                                    ))?,
+                            _ => {}
+                        }
+
                         Ok((field.name().to_string(), kind))
                     })
                     .collect::<miette::Result<_>>()?;
 
-                defs.push(Definition { since, fields });
+                defs.push(Definition {
+                    since,
+                    fields,
+                    name: definition_name.clone(),
+                });
             }
             unknown => {
                 return Err(miette::diagnostic!(
@@ -332,9 +380,10 @@ pub(crate) async fn load_definitions(
         })
         .flat_map(|val| futures::stream::iter(val.transpose()))
         .and_then(|(name, bytes)| async move {
+            let definition_name = name.file_stem().unwrap().to_string();
             Ok((
-                name.file_stem().unwrap().to_string(),
-                parse_definition(&bytes).map_err(|e| {
+                definition_name.clone(),
+                parse_definition(&bytes, definition_name).map_err(|e| {
                     e.with_source_code(NamedSource::new(name, bytes).with_language("kdl"))
                 })?,
             ))
@@ -344,4 +393,3 @@ pub(crate) async fn load_definitions(
 
     Ok(defs)
 }
-

examples/changelog.plrecs

@@ -1,11 +1,31 @@
 changelog "2025-01-29" {
 	title "Added parsing of plaixt definitions"
 	version "0.1.0"
-	kind "Feature"
+	type "Feature"
 }
 
 changelog "2025-01-30 09:10:59+01:00" {
 	title "Added parsing of plaixt records"
 	version "0.1.0"
-	kind "Feature"
+	type "Feature"
+}
+
+changelog "2025-02-01" {
+	title "Added CLI options"
+	version "0.1.0"
+	type "Feature"
+}
+
+changelog "2025-02-07" {
+	title "Added trustfall as a query frontend"
+	version "0.1.0"
+	type "Feature"
+}
+
+file_test "2025-02-08" {
+	path "Cargo.toml"
+}
+
+file_test "2025-02-08" {
+	path "/etc"
 }

examples/definitions/changelog.pldef

@@ -4,6 +4,6 @@ define since="2025-01-29 20:27:30+01:00" {
     fields {
         title is=string
         version is=string
-        kind { oneOf "Bugfix" "Feature" "Chore" }
+        type { oneOf "Bugfix" "Feature" "Chore" }
     }
 }

examples/definitions/file_test.pldef

@@ -0,0 +1,7 @@
+// This is the default changelog entry for the plaixt project
+
+define since="2025-02-08 00:00:00+01:00" {
+    fields {
+        path is="Path"
+    }
+}

flake.lock

@@ -63,11 +63,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1738117527,
-        "narHash": "sha256-GFviGfaezjGLFUlxdv3zyC7rSZvTXqwcG/YsF6MDkOw=",
+        "lastModified": 1738981474,
+        "narHash": "sha256-YIELTXxfATG0g1wXjyaOWA4qrlubds3MG4FvMPCxSGg=",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "6a3dc6ce4132bd57359214d986db376f2333c14d",
+        "rev": "5c571e5ff246d8fc5f76ba6e38dc8edb6e4002fe",
         "type": "github"
       },
       "original": {

flake.nix

@@ -16,8 +16,17 @@
     };
   };
 
-  outputs = { self, nixpkgs, crane, flake-utils, rust-overlay, ... }:
-    flake-utils.lib.eachDefaultSystem (system:
+  outputs =
+    {
+      self,
+      nixpkgs,
+      crane,
+      flake-utils,
+      rust-overlay,
+      ...
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
       let
         pkgs = import nixpkgs {
           inherit system;
@@ -25,29 +34,51 @@
         };
 
         rustTarget = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
-        unstableRustTarget = pkgs.rust-bin.selectLatestNightlyWith (toolchain: toolchain.default.override {
-          extensions = [ "rust-src" "miri" "rustfmt" ];
-        });
+        unstableRustTarget = pkgs.rust-bin.selectLatestNightlyWith (
+          toolchain:
+          toolchain.default.override {
+            extensions = [
+              "rust-src"
+              "miri"
+              "rustfmt"
+            ];
+          }
+        );
         craneLib = (crane.mkLib pkgs).overrideToolchain rustTarget;
         unstableCraneLib = (crane.mkLib pkgs).overrideToolchain unstableRustTarget;
 
         tomlInfo = craneLib.crateNameFromCargoToml { cargoToml = ./Cargo.toml; };
-        inherit (tomlInfo) pname version;
+        inherit (tomlInfo) version;
+
         src = ./.;
 
         rustfmt' = pkgs.writeShellScriptBin "rustfmt" ''
           exec "${unstableRustTarget}/bin/rustfmt" "$@"
         '';
 
-        cargoArtifacts = craneLib.buildDepsOnly {
-          inherit src;
-          cargoExtraArgs = "--all-features --all";
+        common = {
+          src = ./.;
+
+          buildInputs = [
+            pkgs.openssl
+            pkgs.pkg-config
+          ];
         };
 
-        plaixt = craneLib.buildPackage {
-          inherit cargoArtifacts src version;
-          cargoExtraArgs = "--all-features --all";
-        };
+        cargoArtifacts = craneLib.buildDepsOnly (
+          common
+          // {
+            cargoExtraArgs = "--all-features --all";
+          }
+        );
+
+        plaixt = craneLib.buildPackage (
+          common
+          // {
+            inherit cargoArtifacts version;
+            cargoExtraArgs = "--all-features --all";
+          }
+        );
 
       in
       rec {
@@ -78,6 +109,8 @@
         devShells.plaixt = pkgs.mkShell {
           buildInputs = [ ];
 
+          inputsFrom = [ plaixt ];
+
           nativeBuildInputs = [
             rustfmt'
             rustTarget

query

@@ -0,0 +1,27 @@
+{
+    Records {
+        ... on p_file_test {
+            _at @output
+            _kind @output
+            path {
+                ... on Directory {
+                    Children @recurse(depth: 10) {
+                        path @output
+                    }
+                }
+            }
+        }
+    }
+
+    # fs__Path(path: "./crates/plaixt/") {
+    #     ... on fs__Folder {
+    #         directory: path @output
+    #         children @fold {
+    #             ... on fs__File {
+    #                 file: path @output
+    #                 size @output
+    #             }
+    #         }
+    #     }
+    # }
+}

rust-toolchain.toml

@@ -1,2 +1,2 @@
 [toolchain]
-channel = "1.84.0"
+channel = "1.84.1"