From 8923641fdbd9764c1c3fca5bcbe31ee41bab5664 Mon Sep 17 00:00:00 2001
From: Adrien Cacciaguerra <adrien.caccia@gmail.com>
Date: Tue, 14 Oct 2025 16:23:21 +0200
Subject: [PATCH] feat(cargo-codspeed): add explicit mode with command when no
 benchmarks are found in run

---
 crates/cargo-codspeed/src/run.rs                | 2 +-
 crates/cargo-codspeed/tests/simple-bencher.rs   | 2 +-
 crates/cargo-codspeed/tests/simple-criterion.rs | 2 +-
 crates/cargo-codspeed/tests/simple-divan.rs     | 2 +-
 crates/cargo-codspeed/tests/workspace.rs        | 4 ++--
 5 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/crates/cargo-codspeed/src/run.rs b/crates/cargo-codspeed/src/run.rs
index aaa4914b..1dc10393 100644
--- a/crates/cargo-codspeed/src/run.rs
+++ b/crates/cargo-codspeed/src/run.rs
@@ -108,7 +108,7 @@ pub fn run_benches(
     let benches =
         package_filters.benches_to_run(metadata, bench_target_filters, codspeed_target_dir)?;
     if benches.is_empty() {
-        bail!("No benchmarks found. Run `cargo codspeed build` first.");
+        bail!("No benchmarks found for the {measurement_mode} mode. Run `cargo codspeed build -m {measurement_mode}` first.");
     }
 
     eprintln!("Collected {} benchmark suite(s) to run", benches.len());
diff --git a/crates/cargo-codspeed/tests/simple-bencher.rs b/crates/cargo-codspeed/tests/simple-bencher.rs
index e193c61e..d1643a05 100644
--- a/crates/cargo-codspeed/tests/simple-bencher.rs
+++ b/crates/cargo-codspeed/tests/simple-bencher.rs
@@ -13,7 +13,7 @@ fn test_simple_run_without_build() {
         .arg("run")
         .assert()
         .failure()
-        .stderr(contains("Error: No benchmarks found."));
+        .stderr(contains("Error: No benchmarks found for the instrumentation mode. Run `cargo codspeed build -m instrumentation` first."));
     teardown(dir);
 }
 
diff --git a/crates/cargo-codspeed/tests/simple-criterion.rs b/crates/cargo-codspeed/tests/simple-criterion.rs
index 35141b5f..3dc3e2e6 100644
--- a/crates/cargo-codspeed/tests/simple-criterion.rs
+++ b/crates/cargo-codspeed/tests/simple-criterion.rs
@@ -15,7 +15,7 @@ fn test_criterion_run_without_build() {
         .arg("run")
         .assert()
         .failure()
-        .stderr(contains("Error: No benchmarks found."));
+        .stderr(contains("Error: No benchmarks found for the instrumentation mode. Run `cargo codspeed build -m instrumentation` first."));
     teardown(dir);
 }
 
diff --git a/crates/cargo-codspeed/tests/simple-divan.rs b/crates/cargo-codspeed/tests/simple-divan.rs
index 057a5686..46a72fcd 100644
--- a/crates/cargo-codspeed/tests/simple-divan.rs
+++ b/crates/cargo-codspeed/tests/simple-divan.rs
@@ -15,7 +15,7 @@ fn test_divan_run_without_build() {
         .arg("run")
         .assert()
         .failure()
-        .stderr(contains("Error: No benchmarks found."));
+        .stderr(contains("Error: No benchmarks found for the instrumentation mode. Run `cargo codspeed build -m instrumentation` first."));
     teardown(dir);
 }
 
diff --git a/crates/cargo-codspeed/tests/workspace.rs b/crates/cargo-codspeed/tests/workspace.rs
index 337016e3..4bbae74e 100644
--- a/crates/cargo-codspeed/tests/workspace.rs
+++ b/crates/cargo-codspeed/tests/workspace.rs
@@ -12,7 +12,7 @@ fn test_workspace_run_without_build() {
         .arg("run")
         .assert()
         .failure()
-        .stderr(contains("Error: No benchmarks found."));
+        .stderr(contains("Error: No benchmarks found for the instrumentation mode. Run `cargo codspeed build -m instrumentation` first."));
     teardown(dir);
 }
 
@@ -62,7 +62,7 @@ fn test_workspace_build_subpackage_and_run_other() {
         .args(["--package", "package-b"])
         .assert()
         .failure()
-        .stderr(contains("Error: No benchmarks found."));
+        .stderr(contains("Error: No benchmarks found for the instrumentation mode. Run `cargo codspeed build -m instrumentation` first."));
     teardown(dir);
 }