Added CI for nightly toolchains

Author: UebelAndre

.bazelci/presubmit.yml

@@ -2,6 +2,17 @@
 aspects_flags: &aspects_flags
   - "--config=rustfmt"
   - "--config=clippy"
+nightly_aspects_flags: &nightly_aspects_flags
+  - "--//rust/toolchain/channel=nightly"
+  - "--config=rustfmt"
+  - "--config=clippy"
+nightly_flags: &nightly_flags
+  - "--//rust/toolchain/channel=nightly"
+nightly_targets: &nightly_targets
+  - "--"
+  - "//..."
+  # There will not be a stable toolchain registered so this test will expectedly fail.
+  - "-//test/unit/channel_transitions/..."
 default_linux_targets: &default_linux_targets
   - "//..."
 default_macos_targets: &default_macos_targets
@@ -202,6 +213,24 @@ tasks:
     build_targets: *default_linux_targets
     test_targets: *default_linux_targets
     build_flags: *aspects_flags
+  ubuntu2004_nightly_toolchain:
+    name: "Nightly Toolchain"
+    platform: ubuntu2004
+    # Test rules while only registering a nightly toolchain
+    shell_commands:
+      - sed -i 's|^rust_register_toolchains(|load("//rust/private:common.bzl", "DEFAULT_NIGHTLY_ISO_DATE")\nrust_register_toolchains(versions = ["nightly/" + DEFAULT_NIGHTLY_ISO_DATE],\n|' WORKSPACE.bazel
+    build_flags: *nightly_flags
+    build_targets: *nightly_targets
+    test_targets: *nightly_targets
+  ubuntu2004_nightly_with_aspects:
+    name: "Nightly Toolchain With Aspects"
+    platform: ubuntu2004
+    # Test rules while only registering a nightly toolchain
+    shell_commands:
+      - sed -i 's|^rust_register_toolchains(|load("//rust/private:common.bzl", "DEFAULT_NIGHTLY_ISO_DATE")\nrust_register_toolchains(versions = ["nightly/" + DEFAULT_NIGHTLY_ISO_DATE],\n|' WORKSPACE.bazel
+    build_flags: *nightly_aspects_flags
+    build_targets: *nightly_targets
+    test_targets: *nightly_targets
   ubuntu2004_rolling_with_aspects:
     name: "Rolling Bazel Version With Aspects"
     bazel: "rolling"

examples/zig_cross_compiling/WORKSPACE.bazel

@@ -35,7 +35,7 @@ rust_version = "1.65.0"
 rust_register_toolchains(
     edition = "2021",
     extra_target_triples = [],
-    version = rust_version,
+    versions = [rust_version],
 )
 
 rust_repository_set(