dbbd386111
Reporting is another use case that should be satisfied by this tool. Since the use case deviates in terms of I/O, it's worth adding a command-line interface for now and for future expansion. Test: Unit tests included, will validate locally Change-Id: Ifade560d9898722fdd5299d06899265b70ce771f
61 lines
1.0 KiB
Go
61 lines
1.0 KiB
Go
package filesystem
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import (
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"bufio"
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"encoding/csv"
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"fmt"
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"io"
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"os"
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"github.com/pkg/errors"
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)
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type lineHandler func(csvColumns []string)
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func GenerateCSVLines(filePath string, handler lineHandler) error {
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csvFile, err := os.Open(filePath)
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if err != nil {
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return errors.Wrap(
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err,
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fmt.Sprintf("Could not open %s", filePath),
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)
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}
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reader := csv.NewReader(
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bufio.NewReader(csvFile),
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)
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isFirstLine := true
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for {
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line, err := reader.Read()
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if err == io.EOF {
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break
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} else if err != nil {
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return errors.Wrap(
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err,
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fmt.Sprintf("Could not read line from file %s", filePath),
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)
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}
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if !isFirstLine {
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handler(line)
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}
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isFirstLine = false
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}
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return nil
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}
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func WriteCSVToFile(headerCols []string, rowsOfCols [][]string, filepath string) error {
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file, err := os.Create(filepath)
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if err != nil {
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return err
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}
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defer file.Close()
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writer := csv.NewWriter(file)
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defer writer.Flush()
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if err := writer.Write(headerCols); err != nil {
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return err
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}
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return writer.WriteAll(rowsOfCols)
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}
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