/
main.go
91 lines (77 loc) 路 2.07 KB
/
main.go
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package main
import (
"context"
"go/parser"
"go/token"
"log"
"os"
"strings"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/ec2"
"github.com/dave/dst"
"github.com/dave/dst/decorator"
"github.com/slack-go/slack"
)
var (
api = slack.New(os.Getenv("SLACK_API_TOKEN"))
)
func main() {
cfg, err := config.LoadDefaultConfig(context.Background())
if err != nil {
log.Fatalf("error loading aws config %s", err)
}
svc := ec2.NewFromConfig(cfg)
resp, err := svc.DescribeRegions(context.Background(), &ec2.DescribeRegionsInput{
AllRegions: aws.Bool(true),
})
if err != nil {
log.Fatalf("error describing ec2 regions %s", err)
}
f, err := decorator.ParseFile(token.NewFileSet(), "internal/resources/aws/util.go", nil, parser.ParseComments)
if err != nil {
log.Fatalf("error loading aws util file %s", err)
}
currentRegions := make(map[string]struct{})
for _, decl := range f.Decls {
if v, ok := decl.(*dst.GenDecl); ok {
for _, spec := range v.Specs {
if vs, ok := spec.(*dst.ValueSpec); ok && vs.Names[0].Name == "RegionMapping" {
cl := vs.Values[0].(*dst.CompositeLit)
for _, e := range cl.Elts {
val := strings.ReplaceAll(e.(*dst.KeyValueExpr).Key.(*dst.BasicLit).Value, `"`, "")
currentRegions[val] = struct{}{}
}
}
}
}
}
if len(currentRegions) == 0 {
log.Fatal("error parsing aws RegionMapping from util.go, empty list found")
}
notFound := strings.Builder{}
for _, r := range resp.Regions {
if _, ok := currentRegions[*r.RegionName]; !ok {
notFound.WriteString(*r.RegionName + ",")
}
}
if notFound.Len() > 0 {
sendSlackMessage(strings.TrimRight(notFound.String(), ","))
return
}
}
func sendSlackMessage(regions string) {
attachment := slack.Attachment{
Pretext: "found missing region configuration:",
Text: regions,
Color: "ff0000",
}
_, _, err := api.PostMessage(
"production",
slack.MsgOptionAttachments(attachment),
slack.MsgOptionAsUser(true),
)
if err != nil {
log.Fatalf("error sending slack notifications %s", err)
}
}