Add rolling blue green strategy flag

Author: IvanBorislavovDimitrov

commands/deploy_command.go

@@ -123,9 +123,9 @@ func (c *DeployCommand) GetPluginCommand() plugin.Command {
 				util.GetShortOption(allModulesOpt):                 "Deploy all modules which are contained in the deployment descriptor, in the current location",
 				util.GetShortOption(allResourcesOpt):               "Deploy all resources which are contained in the deployment descriptor, in the current location",
 				util.GetShortOption(retriesOpt):                    "Retry the operation N times in case a non-content error occurs (default 3)",
-				util.GetShortOption(strategyOpt):                   "Specify the deployment strategy when updating an mta (default, blue-green)",
-				util.GetShortOption(skipTestingPhase):              "(STRATEGY: BLUE-GREEN) Do not require confirmation for deleting the previously deployed MTA app",
-				util.GetShortOption(skipIdleStart):                 "(STRATEGY: BLUE-GREEN) Directly start the new MTA version as 'live', skipping the 'idle' phase of the resources. Do not require further confirmation or testing before deleting the old version",
+				util.GetShortOption(strategyOpt):                   "Specify the deployment strategy when updating an mta (default, blue-green, (EXPERIMENTAL) incremental-blue-green)",
+				util.GetShortOption(skipTestingPhase):              "(STRATEGY: BLUE-GREEN, (EXPERIMENTAL) INCREMENTAL-BLUE-GREEN) Do not require confirmation for deleting the previously deployed MTA app",
+				util.GetShortOption(skipIdleStart):                 "(STRATEGY: BLUE-GREEN, (EXPERIMENTAL) INCREMENTAL-BLUE-GREEN) Directly start the new MTA version as 'live', skipping the 'idle' phase of the resources. Do not require further confirmation or testing before deleting the old version",
 			},
 		},
 	}

commands/deployment_strategy.go

@@ -20,8 +20,9 @@ func (d *DeployCommandDeploymentStrategy) CreateProcessBuilder() *util.ProcessBu
 }
 
 type BlueGreenDeployCommandDeploymentStrategy struct {
-	noConfirm     bool
-	skipIdleStart bool
+	noConfirm         bool
+	skipIdleStart     bool
+	incrementalDeploy bool
 }
 
 func (b *BlueGreenDeployCommandDeploymentStrategy) CreateProcessBuilder() *util.ProcessBuilder {
@@ -30,23 +31,29 @@ func (b *BlueGreenDeployCommandDeploymentStrategy) CreateProcessBuilder() *util.
 	processBuilder.Parameter("noConfirm", strconv.FormatBool(b.noConfirm))
 	processBuilder.Parameter("skipIdleStart", strconv.FormatBool(b.skipIdleStart))
 	processBuilder.Parameter("keepOriginalAppNamesAfterDeploy", strconv.FormatBool(true))
+	processBuilder.Parameter("shouldApplyIncrementalInstancesUpdate", strconv.FormatBool(b.incrementalDeploy))
 	return processBuilder
 }
 
 func NewDeploymentStrategy(flags *flag.FlagSet, typeProvider ProcessTypeProvider) DeploymentStrategy {
 	if typeProvider.GetProcessType() == (blueGreenDeployCommandProcessTypeProvider{}).GetProcessType() {
-		return &BlueGreenDeployCommandDeploymentStrategy{GetBoolOpt(noConfirmOpt, flags), GetBoolOpt(skipIdleStart, flags)}
+		return &BlueGreenDeployCommandDeploymentStrategy{GetBoolOpt(noConfirmOpt, flags), GetBoolOpt(skipIdleStart, flags), isIncrementalBlueGreen(flags)}
 	}
 	strategy := GetStringOpt(strategyOpt, flags)
 	if strategy == "default" {
 		return &DeployCommandDeploymentStrategy{}
 	}
 	if GetBoolOpt(skipIdleStart, flags) {
-		return &BlueGreenDeployCommandDeploymentStrategy{true, true}
+		return &BlueGreenDeployCommandDeploymentStrategy{true, true, isIncrementalBlueGreen(flags)}
 	}
-	return &BlueGreenDeployCommandDeploymentStrategy{GetBoolOpt(skipTestingPhase, flags), false}
+	return &BlueGreenDeployCommandDeploymentStrategy{GetBoolOpt(skipTestingPhase, flags), false, isIncrementalBlueGreen(flags)}
+}
+
+func isIncrementalBlueGreen(flags *flag.FlagSet) bool {
+	strategy := GetStringOpt(strategyOpt, flags)
+	return strategy == "incremental-blue-green"
 }
 
 func AvailableStrategies() []string {
-	return []string{"blue-green", "default"}
+	return []string{"blue-green", "incremental-blue-green", "default"}
 }