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list_params.go
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/
list_params.go
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package cloudformation
import (
"errors"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/cloudformation"
"github.com/fatih/color"
"github.com/olekukonko/tablewriter"
"io"
"sort"
"strings"
)
type LpParams struct {
StackName string
Sess *session.Session
TableType string
}
type tableData [][]string
func (c tableData) Len() int { return len(c) }
func (c tableData) Swap(i, j int) { c[i], c[j] = c[j], c[i] }
// Compare strings by first key of the sub-slice
func (c tableData) Less(i, j int) bool { return strings.Compare(c[i][0], c[j][0]) == -1 }
func ListParams(lpParams LpParams, writer io.Writer) error {
if lpParams.StackName == "" {
return errors.New("Stack name is missing!")
}
cfSession := cloudformation.New(lpParams.Sess)
params := cloudformation.DescribeStacksInput{StackName: aws.String(lpParams.StackName)}
stackInfo, err := cfSession.DescribeStacks(¶ms)
if err != nil {
return err
}
stackParams := stackInfo.Stacks[0].Parameters
data := sortedStackParams(stackParams)
printTable(data, writer, lpParams.TableType)
return nil
}
func printTable(data tableData, writer io.Writer, tableType string) {
table := tablewriter.NewWriter(writer)
switch tableType {
case "markdown":
setMarkdownTableAttributes(table)
default:
setDefaultTableAttributes(table)
}
setSharedTableAttributes(table)
table.AppendBulk(data)
table.Render()
}
func setMarkdownTableAttributes(table *tablewriter.Table) {
table.SetBorders(tablewriter.Border{Left: true, Top: false, Right: true, Bottom: false})
table.SetCenterSeparator("|")
}
func setDefaultTableAttributes(table *tablewriter.Table) {
table.SetRowLine(true)
}
func setSharedTableAttributes(table *tablewriter.Table) {
titleColor := color.New(color.FgCyan).SprintFunc()
table.SetAutoFormatHeaders(false)
table.SetAlignment(tablewriter.ALIGN_LEFT)
table.SetHeader([]string{titleColor("Parameter Name"), titleColor("Parameter Value")})
}
func sortedStackParams(stackParams []*cloudformation.Parameter) tableData {
keyColor := color.New(color.FgGreen, color.Bold).SprintfFunc()
valueColor := color.New(color.FgBlue).SprintfFunc()
data := tableData{}
for _, v := range stackParams {
data = append(data, []string{keyColor(*v.ParameterKey), valueColor(*v.ParameterValue)})
}
sort.Sort(data)
return data
}