や~、けっこう悩んだ。
まずNameタグなんかは1行でスパッと抜き出せなくて、もっといい書き方ないのかな~ってなってる。
とりあえず以下がそのコード。
### aws ec2 describe-subnets で出力したjson読み込み
$subnet = Get-Content .\describe-subnets.json | ConvertFrom-Json
### カウント用に1要素なにか配列にする
$subnetid = @($subnet.Subnets.SubnetId)
### ヘッダーを1行目に記載
$csvheader = "SubnetName," + "SubnetId," + "CidrBlock," + "Ipv6CidrBlock," + "VpcId," + "AvailabilityZone"
$csvheader | Out-File -Force -Encoding oem -FilePath .\subnets.csv
### 中身を入れていく
for ($i = 0; $i -lt $subnetid.Length; $i++) {
### Nameタグ取り出し
$subnettags = $subnet.Subnets | where {$_.SubnetId -eq $subnet.Subnets.SubnetId[$i]}
$subnetnametag = $subnettags.Tags | where {$_.Key -eq "Name"}
$subnetnamevalue = $subnetnametag.Value
### NameタグがないときはN/Aを入れる
$subnetname = if ($subnetnamevalue -eq $nul) {"N/A"}else{$subnetnamevalue}
### Ipv6も値が空ならN/Aを入れる
$ipv6cidrblock = $subnet.Subnets | where {$_.SubnetId -eq $subnet.Subnets.SubnetId[$i]}
$ipv6cidr = $ipv6cidrblock.Ipv6CidrBlockAssociationSet.Ipv6CidrBlock
$ipv6block = if ($ipv6cidr -eq $nul) {"N/A"}else{$ipv6cidr}
### 中身を詰める
$line = $subnetname + "," + $subnetid[$i] + "," + $subnet.Subnets.CidrBlock[$i] + "," + $ipv6block + "," + $subnet.Subnets.VpcId[$i] + "," + $subnet.Subnets.AvailabilityZone[$i]
$line | Out-File -Append -Encoding oem -FilePath .\subnets.csv
}
今回はここまで