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docker-bake: drop JDK 17 from weekly and future LTS controller images #2191

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docker-bake: drop JDK 17 from weekly and future LTS controller images #2191

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30 changes: 28 additions & 2 deletions docker-bake.hcl
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Original file line number Diff line number Diff line change
Expand Up @@ -184,10 +184,36 @@ function "is_jenkins_version_weekly" {
result = length(regexall("[0-9]+[.]", JENKINS_VERSION)) < 2 ? true : false
}

# return the list of jdk to build depending on JENKINS_VERSION
# Return true if the Jenkins version corresponds to an LTS release.
function "is_jenkins_version_lts" {
# Weekly releases have a single numeric segment (e.g. 2.545),
# while LTS releases include a patch segment (e.g. 2.541.1).
params = []
result = !is_jenkins_version_weekly()
}

# Return true if the Jenkins version belongs to the 2.541.x LTS line.
# JDK 17 is kept only for this LTS for compatibility reasons.
function "is_lts_2541" {
params = []
result = is_jenkins_version_lts() && length(regexall("^2\\.541\\.", JENKINS_VERSION)) > 0
}

# Return the list of JDKs to build depending on the Jenkins release line.
# - Weekly releases must not build JDK 17 (Java 21+ required).
# - LTS 2.541.x keeps JDK 17 for backward compatibility.
# - Future LTS releases must not build JDK 17.
function "jdks_to_build" {
params = []
result = is_jenkins_version_weekly() ? jdks_to_build_for_weekly : jdks_to_build_for_lts
result = (
is_jenkins_version_weekly()
? [for jdk in jdks_to_build_for_weekly : jdk if jdk != 17]
: (
is_lts_2541()
? jdks_to_build_for_lts
: [for jdk in jdks_to_build_for_lts : jdk if jdk != 17]
)
)
}

# return a tag prefixed by the Jenkins version
Expand Down