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parser.go
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parser.go
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/* walter: a deployment pipeline template
* Copyright (C) 2014 Recruit Technologies Co., Ltd. and contributors
* (see CONTRIBUTORS.md)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package config
import (
"container/list"
"fmt"
"reflect"
"strings"
"github.com/recruit-tech/walter/log"
"github.com/recruit-tech/walter/messengers"
"github.com/recruit-tech/walter/pipelines"
"github.com/recruit-tech/walter/services"
"github.com/recruit-tech/walter/stages"
)
func getStageTypeModuleName(stageType string) string {
return strings.ToLower(stageType)
}
func Parse(configData *map[interface{}]interface{}) (*pipelines.Resources, error) {
envs := NewEnvVariables()
return ParseWithSpecifiedEnvs(configData, envs)
}
// TODO: make parser process a struct (for simplifying redundant functions and reducing the number of function parameters)
func ParseWithSpecifiedEnvs(configData *map[interface{}]interface{},
envs *EnvVariables) (*pipelines.Resources, error) {
// parse service block
serviceOps, ok := (*configData)["service"].(map[interface{}]interface{})
var repoService services.Service
var err error
if ok == true {
log.Info("found \"service\" block")
repoService, err = mapService(serviceOps, envs)
if err != nil {
return nil, err
}
} else {
log.Info("not found \"service\" block")
repoService, err = services.InitService("local")
if err != nil {
return nil, err
}
}
// parse messenger block
messengerOps, ok := (*configData)["messenger"].(map[interface{}]interface{})
var messenger messengers.Messenger
if ok == true {
log.Info("found messenger block")
messenger, err = mapMessenger(messengerOps, envs)
if err != nil {
return nil, err
}
} else {
log.Info("not found messenger block")
messenger, err = messengers.InitMessenger("fake")
if err != nil {
return nil, err
}
}
// parse cleanup block
var cleanup *pipelines.Pipeline = &pipelines.Pipeline{}
cleanupData, ok := (*configData)["cleanup"].([]interface{})
if ok == true {
log.Info("found cleanup block")
cleanupList, err := convertYamlMapToStages(cleanupData, envs)
if err != nil {
return nil, err
}
for stageItem := cleanupList.Front(); stageItem != nil; stageItem = stageItem.Next() {
cleanup.AddStage(stageItem.Value.(stages.Stage))
}
} else {
log.Info("not found cleanup block in the input file")
}
// parse pipeline block
var pipeline *pipelines.Pipeline = &pipelines.Pipeline{}
pipelineData, ok := (*configData)["pipeline"].([]interface{})
if ok == false {
return nil, fmt.Errorf("no pipeline block in the input file")
}
stageList, err := convertYamlMapToStages(pipelineData, envs)
if err != nil {
return nil, err
}
for stageItem := stageList.Front(); stageItem != nil; stageItem = stageItem.Next() {
pipeline.AddStage(stageItem.Value.(stages.Stage))
}
var resources = &pipelines.Resources{Pipeline: pipeline, Cleanup: cleanup, Reporter: messenger, RepoService: repoService}
return resources, nil
}
func mapMessenger(messengerMap map[interface{}]interface{}, envs *EnvVariables) (messengers.Messenger, error) {
messengerType := messengerMap["type"].(string)
log.Info("type of reporter is " + messengerType)
messenger, err := messengers.InitMessenger(messengerType)
if err != nil {
return nil, err
}
newMessengerValue := reflect.ValueOf(messenger).Elem()
newMessengerType := reflect.TypeOf(messenger).Elem()
for i := 0; i < newMessengerType.NumField(); i++ {
tagName := newMessengerType.Field(i).Tag.Get("config")
for messengerOptKey, messengerOptVal := range messengerMap {
if tagName == messengerOptKey {
fieldVal := newMessengerValue.Field(i)
if fieldVal.Type() == reflect.ValueOf("string").Type() {
fieldVal.SetString(envs.Replace(messengerOptVal.(string)))
}
}
}
}
return messenger, nil
}
func mapService(serviceMap map[interface{}]interface{}, envs *EnvVariables) (services.Service, error) {
serviceType := serviceMap["type"].(string)
log.Info("type of service is " + serviceType)
service, err := services.InitService(serviceType)
if err != nil {
return nil, err
}
newServiceValue := reflect.ValueOf(service).Elem()
newServiceType := reflect.TypeOf(service).Elem()
for i := 0; i < newServiceType.NumField(); i++ {
tagName := newServiceType.Field(i).Tag.Get("config")
for serviceOptKey, serviceOptVal := range serviceMap {
if tagName == serviceOptKey {
fieldVal := newServiceValue.Field(i)
if fieldVal.Type() == reflect.ValueOf("string").Type() {
fieldVal.SetString(envs.Replace(serviceOptVal.(string)))
}
}
}
}
return service, nil
}
func convertYamlMapToStages(yamlStageList []interface{}, envs *EnvVariables) (*list.List, error) {
stages := list.New()
for _, stageDetail := range yamlStageList {
stage, err := mapStage(stageDetail.(map[interface{}]interface{}), envs)
if err != nil {
return nil, err
}
stages.PushBack(stage)
}
return stages, nil
}
func mapStage(stageMap map[interface{}]interface{}, envs *EnvVariables) (stages.Stage, error) {
log.Debugf("%v", stageMap["run_after"])
var stageType string = "command"
if stageMap["type"] != nil {
stageType = stageMap["type"].(string)
} else if stageMap["stage_type"] != nil {
log.Warn("found property \"stage_type\"")
log.Warn("property \"stage_type\" is deprecated. please use \"type\" instead.")
stageType = stageMap["stage_type"].(string)
}
stage, err := stages.InitStage(stageType)
if err != nil {
return nil, err
}
newStageValue := reflect.ValueOf(stage).Elem()
newStageType := reflect.TypeOf(stage).Elem()
if stageName := stageMap["name"]; stageName != nil {
stage.SetStageName(stageMap["name"].(string))
} else if stageName := stageMap["stage_name"]; stageName != nil {
log.Warn("found property \"stage_name\"")
log.Warn("property \"stage_name\" is deprecated. please use \"stage\" instead.")
stage.SetStageName(stageMap["stage_name"].(string))
}
stageOpts := stages.NewStageOpts()
if reportingFullOutput := stageMap["report_full_output"]; reportingFullOutput != nil {
stageOpts.ReportingFullOutput = true
}
stage.SetStageOpts(*stageOpts)
for i := 0; i < newStageType.NumField(); i++ {
tagName := newStageType.Field(i).Tag.Get("config")
is_replace := newStageType.Field(i).Tag.Get("is_replace")
for stageOptKey, stageOptVal := range stageMap {
if tagName == stageOptKey {
if stageOptVal == nil {
log.Warnf("stage option \"%s\" is not specified", stageOptKey)
} else {
setFieldVal(newStageValue.Field(i), stageOptVal, is_replace, envs)
}
}
}
}
parallelStages := stageMap["parallel"]
if parallelStages == nil {
if parallelStages = stageMap["run_after"]; parallelStages != nil {
log.Warn("`run_after' will be obsoleted in near future. Use `parallel' instead.")
}
}
if parallelStages != nil {
for _, parallelStages := range parallelStages.([]interface{}) {
childStage, err := mapStage(parallelStages.(map[interface{}]interface{}), envs)
if err != nil {
return nil, err
}
stage.AddChildStage(childStage)
}
}
return stage, nil
}
func setFieldVal(fieldVal reflect.Value, stageOptVal interface{}, is_replace string, envs *EnvVariables) {
if fieldVal.Type() == reflect.ValueOf("string").Type() {
if is_replace == "true" {
fieldVal.SetString(envs.Replace(stageOptVal.(string)))
} else {
fieldVal.SetString(stageOptVal.(string))
}
}
}