https://github.com/iamd3vil/csvgen

Golang code generator for parsing CSVs into structs
https://github.com/iamd3vil/csvgen

Last synced: 9 days ago
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Golang code generator for parsing CSVs into structs

• Host: GitHub
• URL: https://github.com/iamd3vil/csvgen
• Owner: iamd3vil
• License: mit
• Created: 2021-06-14T17:55:05.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2022-09-14T04:09:21.000Z (about 2 years ago)
• Last Synced: 2024-06-21T08:29:17.981Z (5 months ago)
• Language: Go
• Size: 18.6 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# csvgen

Golang code generator for parsing CSVs into structs.

## Usage

```

csvgen -file models.go -dest csvgen.go

```

`csvgen` reads all the structs in the file given as input and then generates `ParseCSV` method on the structs. An array of strings in a csv line can be given as input to `ParseCSV()` and get the parsed struct.

Supported types for the fields in the struct are:

- `int32`

- `int64`

- `float32`

- `float64`

- `string`

### Custom Columns

By default, csvgen assumes that the fields start from 0 and incremented by 1 for every consecutive field.

A custom column for a field can be given by using `csv:"{column_position}"`. Columns starts with `0`, so for example 3rd column will be `csv:"2"`.

The subsequent fields will automatically increment from the given custom column.

### Example

A sample program for using the code generated by `csvgen`.

```go

type testCsv struct {

	TestStr     string // Column number 1

	TestInt32   int32 `csv:"5"` // Column number 6

	TestInt64   int64 // Column number 7

	TestFloat32 float32 // Column number 8

	TestFloat64 float64 `csv:"14"` // Column number 15

}

func Parse() {

    f, err := os.Open("test.csv")

    if err != nil {

        log.Fatalln(err)

    }

    rdr := csv.NewReader(f)

    for {

		rec, err := rdr.Read()

		if err != nil {

			if err == io.EOF {

				break

			}

			log.Fatalf("error reading csv: %v", err)

		}

		str := testCsv{}

		if err := str.ParseCSV(rec); err != nil {

			log.Fatalf("error parsing csv record: %v", err)

		}

        fmt.Println("test csv record: %#v", str)

    }

}

```

After generating code with `csvgen`, there will be a `ParseCSV` method on `testCSV` struct, which parses the whole struct.