apollo_supergraph_config/
subgraph.rs

1use camino::Utf8PathBuf;
2use serde::{Deserialize, Serialize};
3use url::Url;
4
5/// Config for a single [subgraph](https://www.apollographql.com/docs/federation/subgraphs/)
6#[derive(Debug, Clone, Serialize, Deserialize)]
7pub struct SubgraphConfig {
8    /// The routing URL for the subgraph.
9    /// This will appear in supergraph SDL and
10    /// instructs the graph router to send all requests
11    /// for this subgraph to this URL.
12    pub routing_url: Option<String>,
13
14    /// The location of the subgraph's SDL
15    pub schema: SchemaSource,
16}
17
18impl SubgraphConfig {
19    /// Returns SDL from the configuration file if it exists.
20    /// Returns None if the configuration does not include raw SDL.
21    pub fn get_sdl(&self) -> Option<String> {
22        if let SchemaSource::Sdl { sdl } = &self.schema {
23            Some(sdl.to_owned())
24        } else {
25            None
26        }
27    }
28}
29
30/// Options for getting SDL:
31/// the graph registry, a file, or an introspection URL.
32///
33/// NOTE: Introspection strips all comments and directives
34/// from the SDL.
35#[derive(Debug, Clone, Serialize, Deserialize)]
36// this is untagged, meaning its fields will be flattened into the parent
37// struct when de/serialized. There is no top level `schema_source`
38// in the configuration.
39#[serde(untagged)]
40pub enum SchemaSource {
41    File { file: Utf8PathBuf },
42    SubgraphIntrospection { subgraph_url: Url },
43    Subgraph { graphref: String, subgraph: String },
44    Sdl { sdl: String },
45}
apollo_supergraph_config/subgraph.rs

apollo_supergraph_config/
subgraph.rs
