[RelEng] Compute release dates from provided SimRel dates

Author: HannesWell

JenkinsJobs/Releng/FOLDER.groovy

@@ -82,12 +82,7 @@ Useful for debugging and to very that the pipeline behaves as intended.
 ''')
 		stringParam('NEXT_RELEASE_VERSION', null, 'Version of the release to prepare, for example: 4.37')
 		stringParam('PREVIOUS_RELEASE_CANDIDATE_ID', null, 'Id of the current release-candiate for the previous release, for example: S-4.36RC2-202505281830')
-		stringParam('M1_DATE', null, 'Milestone 1 end date in the format yyyy-mm-dd, for example: 2025-07-04')
-		stringParam('M2_DATE', null, 'Milestone 2 end date in the format yyyy-mm-dd, for example: 2025-07-25')
-		stringParam('M3_DATE', null, 'Milestone 3 end date in the format yyyy-mm-dd, for example: 2025-08-15')
-		stringParam('RC1_DATE', null, 'Release-Candidate 1 end date in the format yyyy-mm-dd, for example: 2025-08-22')
-		stringParam('RC2_DATE', null, 'Release-Candidate 2 end date in the format yyyy-mm-dd, for example: 2025-08-29')
-		stringParam('GA_DATE', null, 'Final general availability release date in the format yyyy-mm-dd, for example: 2025-09-10')
+		stringParam('NEXT_SIMREL_NAME', null, 'The name of the Simultanious Release that is targeted by the prepared release in the format yyyy-mm, for example: 2026-03')
 	}
 	definition {
 		cpsScm {

JenkinsJobs/Releng/prepareNextDevCycle.jenkinsfile

@@ -53,20 +53,37 @@ pipeline {
 					assignEnvVariable('PREVIOUS_RELEASE_CANDIDATE_I_BUILD', "I${previousIdMatcher.group('date')}-${previousIdMatcher.group('time')}")
 					previousIdMatcher = null // release matcher as it's not serializable
 
-					//TODO: Read the dates from the calender instead of provide a structured document somewhere?
-					// E.g. next to: https://github.com/eclipse-simrel/.github/blob/main/wiki/SimRel/2025-09.md
-					def m1Date = parseDate(readParameter('M1_DATE'))
-					def m2Date = parseDate(readParameter('M2_DATE'))
-					def m3Date = parseDate(readParameter('M3_DATE'))
-					def rc1Date = parseDate(readParameter('RC1_DATE'))
-					def rc2Date = parseDate(readParameter('RC2_DATE'))
-					def gaDate = parseDate(readParameter('GA_DATE'))
+					env.NEXT_SIMREL_NAME = readParameter('NEXT_SIMREL_NAME')
+					def simRelMatcher = env.NEXT_SIMREL_NAME =~ /(?<year>\d{4})-(?<month>\d{2})/
+					if (!simRelMatcher.matches()) {
+						error "Unexpected format for NEXT_SIMREL_NAME: ${NEXT_SIMREL_NAME}"
+					}
+					assignEnvVariable('NEXT_RELEASE_YEAR', simRelMatcher.group('year'))
+					assignEnvVariable('NEXT_RELEASE_MONTH', simRelMatcher.group('month'))
+					assignEnvVariable('NEXT_RELEASE_NAME', "${NEXT_SIMREL_NAME}")
+					simRelMatcher = null // release matcher as it's not serializable
+					
+					def simRelDatesRaw = null //sh(script: "curl --fail https://github.com/eclipse-simrel/.github/blob/main/wiki/SimRel/${NEXT_SIMREL_NAME}_dates.json", returnStdout: true)
+					simRelDatesRaw = '''
+						{
+							"M1": "2025-10-10",
+							"M2": "2025-10-31",
+							"M3": "2025-11-21",
+							"RC1": "2025-11-28",
+							"RC2": "2025-12-05",
+							"GA": "2025-12-10"
+						}
+					'''
+					def simRelDates = readJSON(text: simRelDatesRaw)
+					def m1Date = assignEnvVariable('M1_DATE', parseDate(simRelDates['M1']).minusDays(7)) // Eclipse-TLPs have an offset -7 days
+					def m2Date = assignEnvVariable('M2_DATE', parseDate(simRelDates['M2']).minusDays(7))
+					def m3Date = assignEnvVariable('M3_DATE', parseDate(simRelDates['M3']).minusDays(7))
+					def rc1Date = assignEnvVariable('RC1_DATE', parseDate(simRelDates['RC1']).minusDays(7))
+					def rc2Date = assignEnvVariable('RC2_DATE', parseDate(simRelDates['RC2']).minusDays(7))
+					def gaDate = assignEnvVariable('GA_DATE', parseDate(simRelDates['GA'])) // Final release is at the same day
 					if (!(m1Date < m2Date && m2Date < m3Date && m3Date < rc1Date && rc1Date < rc2Date && rc2Date < gaDate)) {
 						error "Dates are not in strictly ascending order: ${M1_DATE}, ${M2_DATE}, ${M3_DATE}, ${RC1_DATE}, ${RC2_DATE}, ${GA_DATE}"
 					}
-					assignEnvVariable('NEXT_RELEASE_YEAR', gaDate.year.toString())
-					assignEnvVariable('NEXT_RELEASE_MONTH', String.format("%02d", gaDate.monthValue))
-					assignEnvVariable('NEXT_RELEASE_NAME', "${NEXT_RELEASE_YEAR}-${NEXT_RELEASE_MONTH}")
 					assignEnvVariable('MAINTENANCE_BRANCH', "R${PREVIOUS_RELEASE_VERSION_MAJOR}_${PREVIOUS_RELEASE_VERSION_MINOR}_maintenance")
 
 					// Compute new build schedule
@@ -452,9 +469,10 @@ def readParameter(String name) {
 }
 
 @NonCPS
-def assignEnvVariable(String name, String value) {
-	env."${name}" = value
+private Object assignEnvVariable(String name, Object value) {
+	env."${name}" = value?.toString()
 	println("${name}=${value}")
+	return value
 }
 
 @NonCPS