From 709df6a8b7c069cbdcce941d926f5dd3c1941b53 Mon Sep 17 00:00:00 2001
From: imw <imw@users.noreply.github.com>
Date: Tue, 22 Aug 2023 12:27:23 +0200
Subject: [PATCH] fix(tutorial): avoid broken pipe caused by passing non-JSON
 to jq (#1193)

Following the tutorial code results in a broken pipe. This is a simple
fixup that adds a call to tail so that jq is only given valid input.
---
 internal/tutorial/experiment/torsf/chapter01/main.go  | 2 +-
 internal/tutorial/experiment/torsf/chapter03/torsf.go | 2 +-
 internal/tutorial/experiment/torsf/chapter04/torsf.go | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/internal/tutorial/experiment/torsf/chapter01/main.go b/internal/tutorial/experiment/torsf/chapter01/main.go
index da8c5d67c5..4ce9006b65 100644
--- a/internal/tutorial/experiment/torsf/chapter01/main.go
+++ b/internal/tutorial/experiment/torsf/chapter01/main.go
@@ -244,7 +244,7 @@ func main() {
 // You can now run this code as follows:
 //
 // ```
-// $ go run ./experiment/torsf/chapter01 | jq
+// $ go run ./experiment/torsf/chapter01 | tail -n 1 | jq
 // [snip]
 // {
 //   "data_format_version": "",
diff --git a/internal/tutorial/experiment/torsf/chapter03/torsf.go b/internal/tutorial/experiment/torsf/chapter03/torsf.go
index e48ca3add6..6f23d7e546 100644
--- a/internal/tutorial/experiment/torsf/chapter03/torsf.go
+++ b/internal/tutorial/experiment/torsf/chapter03/torsf.go
@@ -161,7 +161,7 @@ func (m *Measurer) run(ctx context.Context,
 // It's now time to run the new code we've written:
 //
 // ```
-// $ go run ./experiment/torsf/chapter03 | jq
+// $ go run ./experiment/torsf/chapter03 | tail -n 1 | jq
 // 2021/06/21 21:21:18  info [  0.1%] torsf experiment is running
 // 2021/06/21 21:21:19  info [  0.2%] torsf experiment is running
 // [...]
diff --git a/internal/tutorial/experiment/torsf/chapter04/torsf.go b/internal/tutorial/experiment/torsf/chapter04/torsf.go
index d350ee94ab..07cc815c28 100644
--- a/internal/tutorial/experiment/torsf/chapter04/torsf.go
+++ b/internal/tutorial/experiment/torsf/chapter04/torsf.go
@@ -228,7 +228,7 @@ func (m *Measurer) run(ctx context.Context,
 // We can now run the code as follows to obtain:
 //
 // ```
-// $ go run ./experiment/torsf/chapter04 | jq
+// $ go run ./experiment/torsf/chapter04 | tail -n 1 | jq
 // [...]
 // Jun 21 23:40:50.000 [notice] Bootstrapped 100% (done): Done
 // 2021/06/21 23:40:50  info [100.0%] torsf experiment is finished