[rb-general] [PATCH] docs/buy_in: Document easier build sys refactoring

Clemens Lang cal at macports.org
Thu Dec 15 13:13:58 CET 2016

From: Clemens Lang <neverpanic at gmail.com>

If your output did not change after a build system change, you can be
reasonably confident that your software will still work. That's better
than re-running all tests, so clearly an advantage of reproducible
 _docs/buy_in.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/_docs/buy_in.md b/_docs/buy_in.md
index 3bf2d9c..393849a 100644
--- a/_docs/buy_in.md
+++ b/_docs/buy_in.md
@@ -93,6 +93,10 @@ With similar artifacts, testing can focus on parts that changed while
 still preserving confidence about unchanged code. This can speed up
 quality assurance and development speed.
+Changes to the build system can be tested easily with reproducible
+builds: If the output artifacts are identical, the changes will not
+affect runtime behavior.
 “But how can I trust my compiler?”

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