Merge #1064

1064: add `CROSS_BUILD_OPTS` and `--build-opts` to enable passing more flags r=Alexhuszagh a=Emilgardis

useful for passing `--network=host`


Co-authored-by: Emil Gardström <[email protected]>

Author: bors[bot]

xtask/src/build_docker_image.rs

@@ -13,6 +13,9 @@ pub struct BuildDockerImage {
     pub ref_type: Option<String>,
     #[clap(long, hide = true, env = "GITHUB_REF_NAME")]
     ref_name: Option<String>,
+    /// Pass extra flags to the build
+    #[clap(long, env = "CROSS_BUILD_OPTS")]
+    build_opts: Option<String>,
     #[clap(action, long = "latest", hide = true, env = "LATEST")]
     is_latest: bool,
     /// Specify a tag to use instead of the derived one, eg `local`
@@ -96,6 +99,7 @@ pub fn build_docker_image(
     BuildDockerImage {
         ref_type,
         ref_name,
+        build_opts,
         is_latest,
         tag: tag_override,
         repository,
@@ -290,6 +294,10 @@ pub fn build_docker_image(
             docker_build.args(["--build-arg", "VERBOSE=1"]);
         }
 
+        if let Some(opts) = &build_opts {
+            docker_build.args(docker::parse_docker_opts(opts)?);
+        }
+
         if target.needs_workspace_root_context() {
             docker_build.arg(&root);
         } else {