feat(workspace): adds GraphQL parsing capabilities via feature

crates/biome_formatter/src/lib.rs

@@ -44,6 +44,7 @@ mod verbatim;
 use crate::formatter::Formatter;
 use crate::group_id::UniqueGroupIdBuilder;
 use crate::prelude::TagKind;
+use std::fmt;
 use std::fmt::{Debug, Display};
 
 use crate::builders::syntax_token_cow_slice;
@@ -673,7 +674,7 @@ impl FormatContext for SimpleFormatContext {
     }
 }
 
-#[derive(Debug, Default, Eq, PartialEq)]
+#[derive(Debug, Default, Eq, PartialEq, Copy, Clone)]
 pub struct SimpleFormatOptions {
     pub indent_style: IndentStyle,
     pub indent_width: IndentWidth,
@@ -713,6 +714,12 @@ impl FormatOptions for SimpleFormatOptions {
     }
 }
 
+impl Display for SimpleFormatOptions {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        fmt::Debug::fmt(self, f)
+    }
+}
+
 /// Lightweight sourcemap marker between source and output tokens
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 #[cfg_attr(

crates/biome_graphql_syntax/Cargo.toml

@@ -15,10 +15,10 @@ version              = "0.1.0"
 [dependencies]
 biome_rowan = { workspace = true }
 schemars    = { workspace = true, optional = true }
-serde       = { workspace = true, features = ["derive"], optional = true }
+serde       = { workspace = true, features = ["derive"] }
 
 [features]
-serde = ["dep:serde", "schemars", "biome_rowan/serde"]
+schema = ["schemars", "biome_rowan/serde"]
 
 [lints]
 workspace = true

crates/biome_graphql_syntax/src/file_source.rs

@@ -0,0 +1,66 @@
+use biome_rowan::FileSourceError;
+use std::ffi::OsStr;
+use std::path::Path;
+
+#[cfg_attr(feature = "schema", derive(schemars::JsonSchema))]
+#[derive(
+    Debug, Clone, Default, Copy, Eq, PartialEq, Hash, serde::Serialize, serde::Deserialize,
+)]
+pub struct GraphqlFileSource {}
+
+impl GraphqlFileSource {
+    /// Try to return the GraphQL file source corresponding to this file name from well-known files
+    pub fn try_from_well_known(file_name: &str) -> Result<Self, FileSourceError> {
+        // TODO: to be implemented
+        Err(FileSourceError::UnknownFileName(file_name.into()))
+    }
+
+    /// Try to return the GraphQL file source corresponding to this file extension
+    pub fn try_from_extension(extension: &str) -> Result<Self, FileSourceError> {
+        match extension {
+            "graphql" | "gql" => Ok(Self::default()),
+            _ => Err(FileSourceError::UnknownExtension(
+                Default::default(),
+                extension.into(),
+            )),
+        }
+    }
+
+    /// Try to return the GraphQL file source corresponding to this language ID
+    ///
+    /// See the [LSP spec] and [VS Code spec] for a list of language identifiers
+    ///
+    /// [LSP spec]: https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentItem
+    /// [VS Code spec]: https://code.visualstudio.com/docs/languages/identifiers
+    pub fn try_from_language_id(language_id: &str) -> Result<Self, FileSourceError> {
+        match language_id {
+            "graphql" => Ok(Self::default()),
+            _ => Err(FileSourceError::UnknownLanguageId(language_id.into())),
+        }
+    }
+}
+
+impl TryFrom<&Path> for GraphqlFileSource {
+    type Error = FileSourceError;
+
+    fn try_from(path: &Path) -> Result<Self, Self::Error> {
+        let file_name = path
+            .file_name()
+            .and_then(OsStr::to_str)
+            .ok_or_else(|| FileSourceError::MissingFileName(path.into()))?;
+
+        if let Ok(file_source) = Self::try_from_well_known(file_name) {
+            return Ok(file_source);
+        }
+
+        // We assume the file extensions are case-insensitive
+        // and we use the lowercase form of them for pattern matching
+        let extension = &path
+            .extension()
+            .and_then(OsStr::to_str)
+            .map(str::to_lowercase)
+            .ok_or_else(|| FileSourceError::MissingFileExtension(path.into()))?;
+
+        Self::try_from_extension(extension)
+    }
+}

crates/biome_graphql_syntax/src/lib.rs

@@ -4,10 +4,12 @@
 
 #[macro_use]
 mod generated;
+mod file_source;
 mod syntax_node;
 
 use biome_rowan::{AstNode, RawSyntaxKind, SyntaxKind};
 pub use biome_rowan::{TextLen, TextRange, TextSize, TokenAtOffset, TriviaPieceKind, WalkEvent};
+pub use file_source::GraphqlFileSource;
 pub use generated::*;
 pub use syntax_node::*;
 

crates/biome_grit_parser/Cargo.toml

@@ -31,9 +31,7 @@ quickcheck_macros = { workspace = true }
 tests_macros      = { workspace = true }
 
 [features]
-schemars = ["dep:schemars"]
-serde    = ["biome_grit_syntax/serde"]
-tests    = []
+schemars = ["dep:schemars", "biome_grit_syntax/schema"]
 
 # cargo-workspaces metadata
 [package.metadata.workspaces]

crates/biome_grit_syntax/Cargo.toml

@@ -13,10 +13,10 @@ version              = "0.5.7"
 [dependencies]
 biome_rowan = { workspace = true }
 schemars    = { workspace = true, optional = true }
-serde       = { workspace = true, features = ["derive"], optional = true }
+serde       = { workspace = true, features = ["derive"] }
 
 [features]
-serde = ["dep:serde", "schemars", "biome_rowan/serde"]
+schema = ["schemars", "biome_rowan/serde"]
 
 [lints]
 workspace = true

crates/biome_service/Cargo.toml

@@ -27,6 +27,8 @@ biome_diagnostics        = { workspace = true }
 biome_flags              = { workspace = true }
 biome_formatter          = { workspace = true, features = ["serde"] }
 biome_fs                 = { workspace = true, features = ["serde"] }
+biome_graphql_parser     = { workspace = true }
+biome_graphql_syntax     = { workspace = true }
 biome_grit_patterns      = { workspace = true }
 biome_js_analyze         = { workspace = true }
 biome_js_factory         = { workspace = true, optional = true }
@@ -65,8 +67,11 @@ schema = [
   "biome_text_edit/schemars",
   "biome_json_syntax/schema",
   "biome_css_syntax/schema",
+  "biome_graphql_syntax/schema",
 ]
 
+graphql = []
+
 [dev-dependencies]
 insta        = { workspace = true }
 tests_macros = { workspace = true }

crates/biome_service/src/file_handlers/graphql.rs

@@ -0,0 +1,112 @@
+use super::{DocumentFileSource, ExtensionHandler, ParseResult};
+use crate::file_handlers::DebugCapabilities;
+use crate::file_handlers::{
+    AnalyzerCapabilities, Capabilities, FormatterCapabilities, ParserCapabilities,
+};
+use crate::settings::{
+    FormatSettings, LanguageListSettings, LanguageSettings, LinterSettings, OverrideSettings,
+    ServiceLanguage, Settings,
+};
+use crate::workspace::GetSyntaxTreeResult;
+use biome_analyze::{AnalyzerConfiguration, AnalyzerOptions};
+use biome_formatter::SimpleFormatOptions;
+use biome_fs::BiomePath;
+use biome_graphql_parser::parse_graphql_with_cache;
+use biome_graphql_syntax::{GraphqlLanguage, GraphqlRoot, GraphqlSyntaxNode};
+use biome_parser::AnyParse;
+use biome_rowan::NodeCache;
+
+impl ServiceLanguage for GraphqlLanguage {
+    type FormatterSettings = ();
+    type LinterSettings = ();
+    type OrganizeImportsSettings = ();
+    type FormatOptions = SimpleFormatOptions;
+    type ParserSettings = ();
+    type EnvironmentSettings = ();
+
+    fn lookup_settings(language: &LanguageListSettings) -> &LanguageSettings<Self> {
+        &language.graphql
+    }
+
+    fn resolve_format_options(
+        _global: Option<&FormatSettings>,
+        _overrides: Option<&OverrideSettings>,
+        _language: Option<&()>,
+        _path: &BiomePath,
+        _document_file_source: &DocumentFileSource,
+    ) -> Self::FormatOptions {
+        SimpleFormatOptions::default()
+    }
+
+    fn resolve_analyzer_options(
+        _global: Option<&Settings>,
+        _linter: Option<&LinterSettings>,
+        _overrides: Option<&OverrideSettings>,
+        _language: Option<&Self::LinterSettings>,
+        path: &BiomePath,
+        _file_source: &DocumentFileSource,
+    ) -> AnalyzerOptions {
+        AnalyzerOptions {
+            configuration: AnalyzerConfiguration::default(),
+            file_path: path.to_path_buf(),
+        }
+    }
+}
+
+#[derive(Debug, Default, PartialEq, Eq)]
+pub(crate) struct GraphqlFileHandler;
+
+impl ExtensionHandler for GraphqlFileHandler {
+    fn capabilities(&self) -> Capabilities {
+        Capabilities {
+            parser: ParserCapabilities { parse: Some(parse) },
+            debug: DebugCapabilities {
+                debug_syntax_tree: Some(debug_syntax_tree),
+                debug_control_flow: None,
+                debug_formatter_ir: None,
+            },
+            analyzer: AnalyzerCapabilities {
+                lint: None,
+                code_actions: None,
+                rename: None,
+                fix_all: None,
+                organize_imports: None,
+            },
+            formatter: FormatterCapabilities {
+                format: None,
+                format_range: None,
+                format_on_type: None,
+            },
+        }
+    }
+}
+
+fn parse(
+    _biome_path: &BiomePath,
+    file_source: DocumentFileSource,
+    text: &str,
+    _settings: Option<&Settings>,
+    cache: &mut NodeCache,
+) -> ParseResult {
+    let parse = parse_graphql_with_cache(text, cache);
+    let root = parse.syntax();
+    let diagnostics = parse.into_diagnostics();
+
+    ParseResult {
+        any_parse: AnyParse::new(
+            // SAFETY: the parser should always return a root node
+            root.as_send().unwrap(),
+            diagnostics,
+        ),
+        language: Some(file_source),
+    }
+}
+
+fn debug_syntax_tree(_rome_path: &BiomePath, parse: AnyParse) -> GetSyntaxTreeResult {
+    let syntax: GraphqlSyntaxNode = parse.syntax();
+    let tree: GraphqlRoot = parse.tree();
+    GetSyntaxTreeResult {
+        cst: format!("{syntax:#?}"),
+        ast: format!("{tree:#?}"),
+    }
+}