test(federation-cli): enable log printing from apollo-federation-cli …

…(backport #6717) (#6755)

Co-authored-by: Duckki Oe <duckki.oe@apollographql.com>

Cargo.lock

@@ -241,6 +241,7 @@ dependencies = [
  "insta",
  "serde",
  "serde_json",
+ "tracing-subscriber",
 ]
 
 [[package]]

apollo-federation/cli/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 apollo-compiler.workspace = true
 apollo-federation = { path = ".." }
 clap = { version = "4.5.1", features = ["derive"] }
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 
 [dev-dependencies]
 insta = { version = "1.38.0", features = ["json", "redactions"] }

apollo-federation/cli/src/main.rs

@@ -12,11 +12,12 @@ use apollo_federation::query_graph;
 use apollo_federation::query_plan::query_planner::QueryPlanner;
 use apollo_federation::query_plan::query_planner::QueryPlannerConfig;
 use apollo_federation::subgraph;
-use bench::BenchOutput;
 use clap::Parser;
+use tracing_subscriber::prelude::*;
 
 mod bench;
 use bench::run_bench;
+use bench::BenchOutput;
 
 #[derive(Parser)]
 struct QueryPlannerArgs {
@@ -123,7 +124,20 @@ impl From<QueryPlannerArgs> for QueryPlannerConfig {
     }
 }
 
+/// Set up the tracing subscriber
+fn init_tracing() {
+    let fmt_layer = tracing_subscriber::fmt::layer()
+        .without_time()
+        .with_target(false);
+    let filter_layer = tracing_subscriber::EnvFilter::from_default_env();
+    tracing_subscriber::registry()
+        .with(fmt_layer)
+        .with(filter_layer)
+        .init();
+}
+
 fn main() -> ExitCode {
+    init_tracing();
     let args = Args::parse();
     let result = match args.command {
         Command::Api {