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main.go
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main.go
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package main
import (
"flag"
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/paulvollmer/go-genslice/generator"
)
func usage() {
fmt.Print("Usage: go-genslice [flags]\n\n")
fmt.Print("Flags:\n")
flag.PrintDefaults()
}
func main() {
flagDatasource := flag.String("d", "", "path to a line separated input source")
flagPackageName := flag.String("p", "main", "the package name")
flagVarName := flag.String("v", "Data", "the variable name")
flagVarType := flag.String("t", "string", "the variable type can be 'string' or 'byte'")
flagSort := flag.Bool("s", false, "sort the input data")
flagPrintDefaultTemplate := flag.Bool("print-default-template", false, "print the default template to stdout and exit")
flag.Usage = usage
flag.Parse()
if *flagPrintDefaultTemplate {
fmt.Println(generator.DefaultTemplate)
os.Exit(0)
}
if *flagDatasource == "" {
fmt.Println("missing -d flag")
os.Exit(2)
}
if *flagVarType != "string" && *flagVarType != "byte" {
fmt.Println("unknown type. use 'string' or 'byte'")
os.Exit(2)
}
dataBytes, err := ioutil.ReadFile(*flagDatasource)
if err != nil {
fmt.Printf("could not read file %q", *flagDatasource)
os.Exit(2)
}
tpl := generator.DefaultTemplate
config := generator.Config{
PackageName: *flagPackageName,
VarName: *flagVarName,
VarType: *flagVarType,
Sort: *flagSort,
Data: strings.Split(string(dataBytes), "\n"),
}
code, err := generator.GenerateCode(tpl, config)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println(string(code))
}