use the new linux-micro image during tests

Author: pietroalbini

tests/buildtest/inside_docker.rs

@@ -5,7 +5,7 @@ use std::io::Write;
 use std::path::Path;
 use std::process::Command;
 
-static DOCKER_IMAGE_TAG: &str = "rustops/crates-build-env";
+static DOCKER_IMAGE_TAG: &str = "ghcr.io/rust-lang/crates-build-env/linux-micro";
 static DOCKER_SOCKET: &str = "/var/run/docker.sock";
 static CONTAINER_PREFIX: &str = "/outside";
 

tests/utils/mod.rs

@@ -1,6 +1,6 @@
 use failure::Error;
 use log::LevelFilter;
-use rustwide::{Workspace, WorkspaceBuilder};
+use rustwide::{cmd::SandboxImage, Workspace, WorkspaceBuilder};
 use std::path::{Path, PathBuf};
 
 static USER_AGENT: &str = "rustwide-tests (https://github.com/rust-lang/rustwide)";
@@ -22,6 +22,13 @@ pub(crate) fn init_named_workspace(name: &str) -> Result<Workspace, Error> {
         builder = builder.running_inside_docker(true);
     }
 
+    // Use the micro image when running tests on Linux, speeding them up.
+    if cfg!(target_os = "linux") {
+        builder = builder.sandbox_image(SandboxImage::remote(
+            "ghcr.io/rust-lang/crates-build-env/linux-micro",
+        )?);
+    }
+
     builder.init()
 }