Add Support for Pre-Release Tag Specification (#1491)

Author: skmcgrail

Makefile

@@ -39,6 +39,7 @@ ENDPOINT_PREFIX_JSON=${CODEGEN_RESOURCES_PATH}/endpoint-prefix.json
 LICENSE_FILE=$(shell pwd)/LICENSE.txt
 
 SMITHY_GO_VERSION ?=
+PRE_RELEASE_VERSION ?=
 RELEASE_MANIFEST_FILE ?=
 RELEASE_CHGLOG_DESC_FILE ?=
 
@@ -57,6 +58,12 @@ REPOTOOLS_CMD_EDIT_MODULE_DEPENDENCY = ${REPOTOOLS_MODULE}/cmd/editmoduledepende
 REPOTOOLS_CALCULATE_RELEASE_VERBOSE ?= false
 REPOTOOLS_CALCULATE_RELEASE_VERBOSE_FLAG=-v=${REPOTOOLS_CALCULATE_RELEASE_VERBOSE}
 
+REPOTOOLS_CALCULATE_RELEASE_ADDITIONAL_ARGS ?=
+
+ifneq ($(PRE_RELEASE_VERSION),)
+	REPOTOOLS_CALCULATE_RELEASE_ADDITIONAL_ARGS += -preview=${PRE_RELEASE_VERSION}
+endif
+
 .PHONY: all
 all: generate unit
 
@@ -398,7 +405,7 @@ ls-changes:
 	go run ${REPOTOOLS_CMD_CHANGELOG} ls
 
 preview-release:
-	go run ${REPOTOOLS_CMD_CALCULATE_RELEASE} ${REPOTOOLS_CALCULATE_RELEASE_VERBOSE_FLAG}
+	go run ${REPOTOOLS_CMD_CALCULATE_RELEASE} ${REPOTOOLS_CALCULATE_RELEASE_VERBOSE_FLAG} ${REPOTOOLS_CALCULATE_RELEASE_ADDITIONAL_ARGS}
 
 pre-release-validation:
 	@if [[ -z "${RELEASE_MANIFEST_FILE}" ]]; then \
@@ -409,7 +416,7 @@ pre-release-validation:
 	fi
 
 release: pre-release-validation
-	go run ${REPOTOOLS_CMD_CALCULATE_RELEASE} -o ${RELEASE_MANIFEST_FILE} ${REPOTOOLS_CALCULATE_RELEASE_VERBOSE_FLAG}
+	go run ${REPOTOOLS_CMD_CALCULATE_RELEASE} -o ${RELEASE_MANIFEST_FILE} ${REPOTOOLS_CALCULATE_RELEASE_VERBOSE_FLAG} ${REPOTOOLS_CALCULATE_RELEASE_ADDITIONAL_ARGS}
 	go run ${REPOTOOLS_CMD_UPDATE_REQUIRES} -release ${RELEASE_MANIFEST_FILE}
 	go run ${REPOTOOLS_CMD_UPDATE_MODULE_METADATA} -release ${RELEASE_MANIFEST_FILE}
 	go run ${REPOTOOLS_CMD_GENERATE_CHANGELOG} -release ${RELEASE_MANIFEST_FILE} -o ${RELEASE_CHGLOG_DESC_FILE}