From: Oto Šťáva <oto.stava@nic.cz>
Date: Wed, 7 Jun 2023 06:09:56 +0000 (+0200)
Subject: ci/images/README: add KNOT_BRANCH explanation
X-Git-Tag: v5.7.0~6^2~1
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=064c7a10bc9cd93959bba10a2bac3d7eac839a12;p=thirdparty%2Fknot-resolver.git

ci/images/README: add KNOT_BRANCH explanation
---

diff --git a/ci/images/README.md b/ci/images/README.md
index d9efe0e8d..3d09f6033 100644
--- a/ci/images/README.md
+++ b/ci/images/README.md
@@ -39,3 +39,11 @@ $ ./push.sh debian-11     # pushes the local image into target registry
 $ ./update.sh debian-11   # utility wrapper that both builds and pushes the image
 $ ./update.sh */          # use shell expansion of dirnames to update all images
 ```
+
+By default, a branch of Knot DNS deemed to be stable is selected according to
+the `vars.sh` file. To build an image for a different Knot DNS branch, set the
+`KNOT_BRANCH` environment variable to the name of the branch, e.g.:
+
+```
+$ KNOT_BRANCH='3.2' ./update.sh debian-11
+```