[nextest-runner] initial support for recording runs

Gated behind an environment variable.

cargo-nextest/src/dispatch.rs

@@ -30,11 +30,13 @@ use nextest_runner::{
     platform::BuildPlatforms,
     reporter::{structured, FinalStatusLevel, StatusLevel, TestOutputDisplay, TestReporterBuilder},
     reuse_build::{archive_to_file, ArchiveReporter, MetadataOrPath, PathMapper, ReuseBuildInfo},
+    run_store::RunStore,
     runner::{configure_handle_inheritance, RunStatsFailureKind, TestRunnerBuilder},
     show_config::{ShowNextestVersion, ShowTestGroupSettings, ShowTestGroups, ShowTestGroupsMode},
     signal::SignalHandlerKind,
     target_runner::{PlatformRunner, TargetRunner},
     test_filter::{RunIgnored, TestFilterBuilder},
+    test_output::CaptureStrategy,
 };
 use once_cell::sync::OnceCell;
 use owo_colors::{OwoColorize, Stream, Style};
@@ -743,10 +745,7 @@ pub struct TestRunnerOpts {
 }
 
 impl TestRunnerOpts {
-    fn to_builder(
-        &self,
-        cap_strat: nextest_runner::test_output::CaptureStrategy,
-    ) -> Option<TestRunnerBuilder> {
+    fn to_builder(&self, cap_strat: CaptureStrategy) -> Option<TestRunnerBuilder> {
         if self.no_run {
             return None;
         }
@@ -1557,7 +1556,6 @@ impl App {
                 structured_reporter.set_libtest(libtest);
             }
         };
-        use nextest_runner::test_output::CaptureStrategy;
 
         let cap_strat = if no_capture {
             CaptureStrategy::None
@@ -1584,19 +1582,6 @@ impl App {
         let output = output_writer.reporter_output();
         let profile = profile.apply_build_platforms(&build_platforms);
 
-        let mut reporter = reporter_opts
-            .to_builder(no_capture)
-            .set_verbose(self.base.output.verbose)
-            .build(&test_list, &profile, output, structured_reporter);
-        if self
-            .base
-            .output
-            .color
-            .should_colorize(supports_color::Stream::Stderr)
-        {
-            reporter.colorize();
-        }
-
         let handler = SignalHandlerKind::Standard;
         let runner_builder = match runner_opts.to_builder(cap_strat) {
             Some(runner_builder) => runner_builder,
@@ -1615,11 +1600,51 @@ impl App {
             target_runner.clone(),
         )?;
 
+        // Start recording runs if the environment variable is set.
+        {
+            const EXPERIMENTAL_ENV: &str = "NEXTEST_EXPERIMENTAL_RECORD_RUNS";
+            if std::env::var(EXPERIMENTAL_ENV).as_deref() == Ok("1") {
+                // For the record reporter, use the global store dir to share runs across profiles.
+                let store = RunStore::new(profile.global_store_dir())
+                    .map_err(|err| ExpectedError::RunRecordError { err })?;
+                let locked_store = store
+                    .lock_exclusive()
+                    .map_err(|err| ExpectedError::RunRecordError { err })?;
+                let recorder = locked_store
+                    .create_run_recorder(
+                        runner.run_id(),
+                        self.base.current_version.clone(),
+                        runner.started_at().fixed_offset(),
+                    )
+                    .map_err(|err| ExpectedError::RunRecordError { err })?;
+
+                let record = structured::RecordReporter::new(recorder);
+                structured_reporter.set_record(record);
+            }
+        }
+
+        let mut reporter = reporter_opts
+            .to_builder(no_capture)
+            .set_verbose(self.base.output.verbose)
+            .build(&test_list, &profile, output, structured_reporter);
+        if self
+            .base
+            .output
+            .color
+            .should_colorize(supports_color::Stream::Stderr)
+        {
+            reporter.colorize();
+        }
+
         configure_handle_inheritance(no_capture)?;
+        reporter.report_meta(&self.base.cargo_metadata_json, &test_list);
+
         let run_stats = runner.try_execute(|event| {
             // Write and flush the event.
             reporter.report_event(event)
         })?;
+        reporter.finish()?;
+
         self.base
             .check_version_config_final(version_only_config.nextest_version())?;
         if !run_stats.is_success() {

cargo-nextest/src/errors.rs

@@ -141,6 +141,11 @@ pub enum ExpectedError {
         #[from]
         err: FromMessagesError,
     },
+    #[error("error recording test run")]
+    RunRecordError {
+        #[source]
+        err: RunStoreError,
+    },
     #[error("create test list error")]
     CreateTestListError {
         #[source]
@@ -386,6 +391,7 @@ impl ExpectedError {
             | Self::TestFilterBuilderError { .. }
             | Self::UnknownHostPlatform { .. }
             | Self::ArgumentFileReadError { .. }
+            | Self::RunRecordError { .. }
             | Self::UnknownArchiveFormat { .. }
             | Self::ArchiveExtractError { .. }
             | Self::RustBuildMetaParseError { .. }
@@ -700,6 +706,10 @@ impl ExpectedError {
                 log::error!("failed to parse messages generated by Cargo");
                 Some(err as &dyn Error)
             }
+            Self::RunRecordError { err } => {
+                log::error!("error recording run");
+                Some(err as &dyn Error)
+            }
             Self::CreateTestListError { err } => {
                 log::error!("creating test list failed");
                 Some(err as &dyn Error)

nextest-metadata/src/test_list.rs

@@ -146,6 +146,7 @@ impl TestListSummary {
             rust_suites: BTreeMap::new(),
         }
     }
+
     /// Parse JSON output from `cargo nextest list --message-format json`.
     pub fn parse_json(json: impl AsRef<str>) -> Result<Self, serde_json::Error> {
         serde_json::from_str(json.as_ref())

nextest-runner/Cargo.toml

@@ -28,11 +28,12 @@ config = { version = "0.13.4", default-features = false, features = [
 ] }
 cargo_metadata = "0.18.1"
 cfg-if = "1.0.0"
-chrono = "0.4.33"
+chrono = { version = "0.4.33", features = ["serde"] }
 debug-ignore = "1.0.5"
 display-error-chain = "0.2.0"
 either = "1.9.0"
 futures = "0.3.30"
+fs4 = "0.7.0"
 guppy = "0.17.4"
 # Used to find the cargo root directory, which is needed in case the user has
 # added a config.toml there
@@ -77,6 +78,7 @@ tokio = { version = "1.35.1", features = [
 toml = "0.8.8"
 toml_edit = { version = "0.21.0", features = ["serde"] }
 xxhash-rust = { version = "0.8.8", features = ["xxh64"] }
+zip = { version = "0.6.6", default-features = false, features = ["zstd"] }
 zstd = { version = "0.13.0", features = ["zstdmt"] }
 
 ###
@@ -93,7 +95,7 @@ self_update = { version = "0.39.0", optional = true, default-features = false, f
 nextest-filtering = { version = "0.7.1", path = "../nextest-filtering" }
 nextest-metadata = { version = "0.10.0", path = "../nextest-metadata" }
 quick-junit = { version = "0.3.5", path = "../quick-junit" }
-uuid = { version = "1.7.0", features = ["v4"] }
+uuid = { version = "1.7.0", features = ["v4", "serde"] }
 console-subscriber = { version = "0.2.0", optional = true }
 unicode-ident = "1.0.12"
 unicode-normalization = "0.1.22"