JSONを一行で取得する

まずｊｑをインストール

$ brew install jq

整形する

例として以下のJSONを整形します。

{ "name"   : "John Smith",
  "sku"    : "20223",
  "price"  : 23.95,
  "shipTo" : { "name" : "Jane Smith",
               "address" : "123 Maple Street",
               "city" : "Pretendville",
               "state" : "NY",
               "zip"   : "12345" },
  "billTo" : { "name" : "John Smith",
               "address" : "123 Maple Street",
               "city" : "Pretendville",
               "state" : "NY",
               "zip"   : "12345" }
}

以下のコマンド

$ echo '{ "name"   : "John Smith",
  "sku"    : "20223",
  "price"  : 23.95,
  "shipTo" : { "name" : "Jane Smith",
               "address" : "123 Maple Street",
               "city" : "Pretendville",
               "state" : "NY",
               "zip"   : "12345" },
  "billTo" : { "name" : "John Smith",
               "address" : "123 Maple Street",
               "city" : "Pretendville",
               "state" : "NY",
               "zip"   : "12345" }
}' | jq -c

を実行することで、

{"name":"John Smith","sku":"20223","price":23.95,"shipTo":{"name":"Jane Smith","address":"123 Maple Street","city":"Pretendville","state":"NY","zip":"12345"},"billTo":{"name":"John Smith","address":"123 Maple Street","city":"Pretendville","state":"NY","zip":"12345"}}

一行で取得することができます。