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util.go
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util.go
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package logs
import (
"fmt"
"sort"
"time"
"github.com/aws/aws-sdk-go-v2/service/cloudformation/types"
"github.com/aws/smithy-go/ptr"
"github.com/aws-cloudformation/rain/internal/aws/cfn"
"github.com/aws-cloudformation/rain/internal/console"
"github.com/aws-cloudformation/rain/internal/console/spinner"
"github.com/aws-cloudformation/rain/internal/ui"
)
var uninterestingMessages = map[string]bool{
"Resource creation Initiated": true,
"User Initiated": true,
"Transformation succeeded": true,
}
type events []types.StackEvent
func (e events) Len() int {
return len(e)
}
func (e events) Swap(i, j int) {
e[i], e[j] = e[j], e[i]
}
func (e events) Less(i, j int) bool {
return ptr.ToTime(e[i].Timestamp).Unix() < ptr.ToTime(e[j].Timestamp).Unix()
}
func reduceLogsToLength(logsRange uint, logs *events) {
if int(logsRange) >= len(*logs) {
return
}
var reducedLogs events
for i := 0; i < int(logsRange); i++ {
reducedLogs = append(reducedLogs, (*logs)[i])
}
*logs = reducedLogs
}
func reduceLogsByDuration(logsRange time.Duration, logs *events) {
timeNow := time.Now()
logLimitTime := timeNow.Add(logsRange)
var reducedLogs events
for _, log := range *logs {
if log.Timestamp.After(logLimitTime) {
reducedLogs = append(reducedLogs, log)
}
}
*logs = reducedLogs
}
func reduceLogs(logsRange uint, logsDays uint, logs *events) {
if logsDays > 0 {
duration := time.Duration(time.Hour * time.Duration(int(logsDays)*-24))
reduceLogsByDuration(duration, logs)
}
if logsRange > 0 {
reduceLogsToLength(logsRange, logs)
}
}
func printLogs(logsRange uint, logsDays uint, logs events) {
reduceLogs(logsRange, logsDays, &logs)
for _, log := range logs {
fmt.Printf("%s %s/%s (%s) %s",
console.White(ptr.ToTime(log.Timestamp).Format(time.Stamp)),
ptr.ToString(log.StackName),
console.Yellow(ptr.ToString(log.LogicalResourceId)),
ptr.ToString(log.ResourceType),
ui.ColouriseStatus(string(log.ResourceStatus)),
)
if log.ResourceStatusReason != nil {
fmt.Printf(" %q", ptr.ToString(log.ResourceStatusReason))
}
fmt.Println()
}
}
func getLogs(stackName, resourceName string) (events, error) {
spinner.Push(fmt.Sprintf("Getting logs for stack '%s'", stackName))
var logs events
var err error
// Get logs
logs, err = cfn.GetStackEvents(stackName)
if err != nil {
return nil, err
}
if resourceName != "" {
// Filter by resource
newLogs := make([]types.StackEvent, 0)
for _, log := range logs {
if ptr.ToString(log.LogicalResourceId) == resourceName {
newLogs = append(newLogs, log)
}
}
logs = newLogs
} else {
// See if we have nested stacks (don't get these if we've specified a resource)
resources, err := cfn.GetStackResources(stackName)
if err != nil {
return nil, err
}
for _, resource := range resources {
if ptr.ToString(resource.ResourceType) == "AWS::CloudFormation::Stack" {
if resource.PhysicalResourceId != nil {
nestedLogs, err := getLogs(ptr.ToString(resource.PhysicalResourceId), "")
if err != nil {
return nil, err
}
logs = append(logs, nestedLogs...)
}
}
}
}
// Filter out uninteresting messages
newLogs := make([]types.StackEvent, 0)
for _, log := range logs {
if allLogs || (log.ResourceStatusReason != nil && !uninterestingMessages[*log.ResourceStatusReason]) {
newLogs = append(newLogs, log)
}
}
logs = newLogs
// Sort by timestamp
sort.Sort(logs)
// Reverse order
for i := len(logs)/2 - 1; i >= 0; i-- {
j := len(logs) - 1 - i
logs[i], logs[j] = logs[j], logs[i]
}
spinner.Pop()
return logs, nil
}