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+# csvgen
+
+Generate Go struct definitions from CSV headers, with deduplication across structs.
+
+For example, these three headers from Amazon order history reports:
+
+```csv
+Order Date,Order ID,Title,Category,ASIN/ISBN,UNSPSC Code,Website,Release Date,Condition,Seller,Seller Credentials,List Price Per Unit,Purchase Price Per Unit,Quantity,Payment Instrument Type,Purchase Order Number,PO Line Number,Ordering Customer Email,Shipment Date,Shipping Address Name,Shipping Address Street 1,Shipping Address Street 2,Shipping Address City,Shipping Address State,Shipping Address Zip,Order Status,Carrier Name & Tracking Number,Item Subtotal,Item Subtotal Tax,Item Total,Tax Exemption Applied,Tax Exemption Type,Exemption Opt-Out,Buyer Name,Currency,Group Name
+Order Date,Order ID,Payment Instrument Type,Website,Purchase Order Number,Ordering Customer Email,Shipment Date,Shipping Address Name,Shipping Address Street 1,Shipping Address Street 2,Shipping Address City,Shipping Address State,Shipping Address Zip,Order Status,Carrier Name & Tracking Number,Subtotal,Shipping Charge,Tax Before Promotions,Total Promotions,Tax Charged,Total Charged,Buyer Name,Group Name
+Order ID,Order Date,Title,Category,ASIN/ISBN,Website,Purchase Order Number,Seller,Seller Credentials,Ordering Customer Email,Shipment Date,Shipping Address Name,Shipping Address Street 1,Shipping Address Street 2,Shipping Address City,Shipping Address State,Shipping Address Zip,Return Date,Return Reason,Quantity,Buyer Name,Group Name
+```
+
+Results in three component structs for deduplication (`ABC, AB, AC`) and three base structs (`A, B, C`):
+
+```go
+package main
+
+type ABC struct {
+ BuyerName string `csv:"Buyer Name"`
+ GroupName string `csv:"Group Name"`
+ OrderDate string `csv:"Order Date"`
+ OrderId string `csv:"Order ID"`
+ OrderingCustomerEmail string `csv:"Ordering Customer Email"`
+ PurchaseOrderNumber string `csv:"Purchase Order Number"`
+ ShipmentDate string `csv:"Shipment Date"`
+ ShippingAddressCity string `csv:"Shipping Address City"`
+ ShippingAddressName string `csv:"Shipping Address Name"`
+ ShippingAddressState string `csv:"Shipping Address State"`
+ ShippingAddressStreet1 string `csv:"Shipping Address Street 1"`
+ ShippingAddressStreet2 string `csv:"Shipping Address Street 2"`
+ ShippingAddressZip string `csv:"Shipping Address Zip"`
+ Website string `csv:"Website"`
+}
+
+type AB struct {
+ CarrierNameTrackingNumber string `csv:"Carrier Name & Tracking Number"`
+ OrderStatus string `csv:"Order Status"`
+ PaymentInstrumentType string `csv:"Payment Instrument Type"`
+}
+
+type AC struct {
+ AsinIsbn string `csv:"ASIN/ISBN"`
+ Category string `csv:"Category"`
+ Quantity string `csv:"Quantity"`
+ Seller string `csv:"Seller"`
+ SellerCredentials string `csv:"Seller Credentials"`
+ Title string `csv:"Title"`
+}
+
+type A struct {
+ ABC
+ AB
+ AC
+
+ Condition string `csv:"Condition"`
+ Currency string `csv:"Currency"`
+ ExemptionOptOut string `csv:"Exemption Opt-Out"`
+ ItemSubtotal string `csv:"Item Subtotal"`
+ ItemSubtotalTax string `csv:"Item Subtotal Tax"`
+ ItemTotal string `csv:"Item Total"`
+ ListPricePerUnit string `csv:"List Price Per Unit"`
+ PoLineNumber string `csv:"PO Line Number"`
+ PurchasePricePerUnit string `csv:"Purchase Price Per Unit"`
+ ReleaseDate string `csv:"Release Date"`
+ TaxExemptionApplied string `csv:"Tax Exemption Applied"`
+ TaxExemptionType string `csv:"Tax Exemption Type"`
+ UnspscCode string `csv:"UNSPSC Code"`
+}
+
+type B struct {
+ ABC
+ AB
+
+ ShippingCharge string `csv:"Shipping Charge"`
+ Subtotal string `csv:"Subtotal"`
+ TaxBeforePromotions string `csv:"Tax Before Promotions"`
+ TaxCharged string `csv:"Tax Charged"`
+ TotalCharged string `csv:"Total Charged"`
+ TotalPromotions string `csv:"Total Promotions"`
+}
+
+type C struct {
+ ABC
+ AC
+
+ ReturnDate string `csv:"Return Date"`
+ ReturnReason string `csv:"Return Reason"`
+}
+```