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main.go
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main.go
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package cmd
import (
"errors"
"fmt"
"os"
"github.com/eirannejad/pushcsv/internal/cli"
"github.com/eirannejad/pushcsv/internal/datafile"
"github.com/eirannejad/pushcsv/internal/persistance"
)
func Run() {
// process arguments
argv := os.Args[1:]
options := cli.NewOptions(argv)
// log options if requested
logger := cli.NewLogger(options)
logger.Trace(options)
for key, value := range *options.Opts {
logger.Debug(fmt.Sprintf("%s=%v", key, value))
}
// check connection string and determine target db driver
// verify db is supported
// this step should be before starting io on reading data file
dbConfig, cErr := persistance.NewDatabaseConfig(options.ConnString)
if cErr != nil {
errorAndExit(cErr)
}
var tableData *datafile.TableData
var readRrr error
// check if input file is specified
if options.DataFile != "" {
// check if writer needs headers
if dbConfig.NeedsHeaders && !options.HasHeaders {
errorAndExit(
errors.New(
"headers are required to write to this database. " +
"make sure source file has headers on first line and " +
"use --headers flag"))
}
// read datafile
// prepare the data for writer; fixes the data mappings
tableData, readRrr =
datafile.ReadData(options.DataFile, options, logger)
if readRrr != nil {
errorAndExit(readRrr)
}
}
// request a writer for db
writer, nErr := persistance.NewWriter(dbConfig, options, logger)
if nErr != nil {
errorAndExit(nErr)
}
// write to db
var result *persistance.Result
var commitErr error
if tableData != nil {
result, commitErr = writer.Write(tableData)
} else {
result, commitErr = writer.Purge(options.Table)
}
if commitErr != nil {
errorAndExit(commitErr)
}
fmt.Println(result.Message)
}
func errorAndExit(err error) {
fmt.Fprintln(os.Stderr, err.Error())
os.Exit(1)
}