Ensure that docker tag is legal (#46035)

066a992a · Todd Volkert · GitHub · 4c95bbd1 · 066a992a
Unverified Commit 066a992a authored Dec 04, 2019 by Todd Volkert Committed by GitHub Dec 04, 2019
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docker_build.sh dev/ci/docker_linux/docker_build.sh +4 -0

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--- a/dev/ci/docker_linux/docker_build.sh
+++ b/dev/ci/docker_linux/docker_build.sh
@@ -5,6 +5,10 @@

 TAG="${CIRRUS_TAG:-latest}"

+# Convert "+" to "-" to make hotfix tags legal Docker tag names.
+# See https://docs.docker.com/engine/reference/commandline/tag/
+TAG=${TAG/+/-}
+
 # pull to make sure we are not rebuilding for nothing
 sudo docker pull "gcr.io/flutter-cirrus/build-flutter-image:$TAG"