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use std::collections::HashMap;
use std::path::PathBuf;
use std::sync::Arc;
use failure::{bail, format_err, Error, ResultExt};
use futures::compat::*;
use futures::lock::Mutex;
use log::*;
use tower_grpc::{BoxBody, Request};
use tower_hyper::client::Connection;
use buildkit_proto::google::rpc::Status;
use buildkit_proto::moby::buildkit::v1::frontend::{
client, result::Result as RefResult, ReadFileRequest, ResolveImageConfigRequest,
Result as Output, ReturnRequest, SolveRequest,
};
pub use buildkit_llb::ops::source::{ImageSource, ResolveMode};
pub use buildkit_llb::ops::Terminal;
pub use buildkit_proto::moby::buildkit::v1::frontend::FileRange;
use crate::error::ErrorCode;
use crate::oci::ImageSpecification;
use crate::utils::OutputRef;
type BridgeConnection = tower_request_modifier::RequestModifier<Connection<BoxBody>, BoxBody>;
#[derive(Clone)]
pub struct Bridge {
client: Arc<Mutex<client::LlbBridge<BridgeConnection>>>,
}
impl Bridge {
pub(crate) fn new(client: BridgeConnection) -> Self {
Self {
client: Arc::new(Mutex::new(client::LlbBridge::new(client))),
}
}
pub async fn resolve_image_config(
&self,
image: &ImageSource,
log: Option<&str>,
) -> Result<(String, ImageSpecification), Error> {
let request = ResolveImageConfigRequest {
r#ref: image.canonical_name().into(),
platform: None,
resolve_mode: image.resolve_mode().unwrap_or_default().to_string(),
log_name: log.unwrap_or_default().into(),
};
debug!("requesting to resolve an image: {:?}", request);
let response = {
self.client
.lock()
.await
.resolve_image_config(Request::new(request))
.compat()
.await
.unwrap()
.into_inner()
};
Ok((
response.digest,
serde_json::from_slice(&response.config)
.context("Unable to parse image specification")?,
))
}
pub async fn solve<'a, 'b: 'a>(&'a self, graph: Terminal<'b>) -> Result<OutputRef, Error> {
debug!("serializing a graph to request");
let request = SolveRequest {
definition: Some(graph.into_definition()),
exporter_attr: vec![],
allow_result_return: true,
..Default::default()
};
debug!("requesting to solve a graph");
let response = {
self.client
.lock()
.await
.solve(Request::new(request))
.compat()
.await
.context("Unable to solve the graph")?
.into_inner()
.result
.ok_or_else(|| format_err!("Unable to extract solve result"))?
};
debug!("got response: {:#?}", response);
let inner = {
response
.result
.ok_or_else(|| format_err!("Unable to extract solve result"))?
};
match inner {
RefResult::Ref(inner) => Ok(OutputRef(inner)),
other => bail!("Unexpected solve response: {:?}", other),
}
}
pub async fn read_file<'a, 'b: 'a, P>(
&'a self,
layer: &'b OutputRef,
path: P,
range: Option<FileRange>,
) -> Result<Vec<u8>, Error>
where
P: Into<PathBuf>,
{
let file_path = path.into().display().to_string();
debug!("requesting a file contents: {:#?}", file_path);
let request = ReadFileRequest {
r#ref: layer.0.clone(),
file_path,
range,
};
let response = {
self.client
.lock()
.await
.read_file(Request::new(request))
.compat()
.await
.context("Unable to read the file")?
.into_inner()
.data
};
Ok(response)
}
pub(crate) async fn finish_with_success(
self,
output: OutputRef,
config: Option<ImageSpecification>,
) -> Result<(), Error> {
let mut metadata = HashMap::new();
if let Some(config) = config {
metadata.insert("containerimage.config".into(), serde_json::to_vec(&config)?);
}
let request = ReturnRequest {
error: None,
result: Some(Output {
result: Some(RefResult::Ref(output.0)),
metadata,
}),
};
self.client
.lock()
.await
.r#return(Request::new(request))
.compat()
.await?;
Ok(())
}
pub(crate) async fn finish_with_error<S>(self, code: ErrorCode, message: S) -> Result<(), Error>
where
S: Into<String>,
{
let request = ReturnRequest {
result: None,
error: Some(Status {
code: code as i32,
message: message.into(),
details: vec![],
}),
};
debug!("sending an error result: {:#?}", request);
self.client
.lock()
.await
.r#return(Request::new(request))
.compat()
.await?;
Ok(())
}
}