func main() {
cpuCount := runtime.NumCPU()
runtime.GOMAXPROCS(cpuCount)
flag.Usage = func() {
fmt.Println("Usage: csv_exporter [options] > filename")
flag.PrintDefaults()
}
flag.Parse()
ds := dsFlags.CreateDataset()
if ds == nil {
flag.Usage()
return
}
defer ds.Store().Close()
comma, err := csv.StringToRune(*delimiter)
if err != nil {
fmt.Println(err.Error())
flag.Usage()
return
}
err = d.Try(func() {
nomsList, structDesc := csv.ValueToListAndElemDesc(ds.Head().Value(), ds.Store())
csv.Write(nomsList, structDesc, comma, os.Stdout)
})
if err != nil {
fmt.Println("Failed to export dataset as CSV:")
fmt.Println(err)
}
}
func main() {
cpuCount := runtime.NumCPU()
runtime.GOMAXPROCS(cpuCount)
flag.Usage = func() {
fmt.Println("Usage: csv_importer [options] file\n")
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() != 1 {
fmt.Printf("Expected exactly one parameter (path) after flags, but you have %d. Maybe you put a flag after the path?\n", flag.NArg())
flag.Usage()
return
}
path := flag.Arg(0)
if path == "" {
flag.Usage()
return
}
res, err := os.Open(path)
d.Exp.NoError(err)
defer res.Close()
comma, err := csv.StringToRune(*delimiter)
if err != nil {
fmt.Println(err.Error())
flag.Usage()
return
}
r := csv.NewCSVReader(res, comma)
var headers []string
if *header == "" {
headers, err = r.Read()
d.Exp.NoError(err)
} else {
headers = strings.Split(*header, string(comma))
}
if *reportTypes {
kinds := csv.ReportValidFieldTypes(r, headers)
d.Chk.Equal(len(headers), len(kinds))
fmt.Println("Possible types for each column:")
for i, key := range headers {
fmt.Printf("%s: %s\n", key, strings.Join(csv.KindsToStrings(kinds[i]), ","))
}
return
}
ds := dsFlags.CreateDataset()
if ds == nil {
flag.Usage()
return
}
defer ds.Store().Close()
kinds := []types.NomsKind{}
if *columnTypes != "" {
kinds = csv.StringsToKinds(strings.Split(*columnTypes, ","))
}
value, _, _ := csv.Read(r, *name, headers, kinds, ds.Store())
_, err = ds.Commit(value)
d.Exp.NoError(err)
}