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copy.go
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copy.go
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package copy
import (
"context"
"fmt"
"io"
"os"
"os/exec"
"regexp"
"strings"
"github.com/lunarway/release-manager/internal/log"
"github.com/pkg/errors"
)
var (
// ErrUnknownSource indicates that the source directory was not found.
ErrUnknownSource = errors.New("copy: unknown source")
)
type Copier struct {
logger *log.Logger
}
func New(logger *log.Logger) *Copier {
return &Copier{
logger: logger,
}
}
func (c *Copier) CopyDir(ctx context.Context, src, dest string) error {
if !strings.HasSuffix(src, string(os.PathSeparator)) {
src = fmt.Sprintf("%s/.", src)
}
return c.execCommand(ctx, ".", "cp", "-a", src, dest)
}
func (c *Copier) CopyFile(ctx context.Context, src, dest string) error {
return c.execCommand(ctx, ".", "cp", "-a", src, dest)
}
func (c *Copier) execCommand(ctx context.Context, rootPath string, cmdName string, args ...string) error {
logger := c.logger.WithContext(ctx).WithFields("root", rootPath)
logger.Infof("copy/execCommand: running: %s %s", cmdName, strings.Join(args, " "))
cmd := exec.CommandContext(ctx, cmdName, args...)
cmd.Dir = rootPath
stdout, err := cmd.StdoutPipe()
if err != nil {
return errors.WithMessage(err, "get stdout pipe for command")
}
stderr, err := cmd.StderrPipe()
if err != nil {
return errors.WithMessage(err, "get stderr pipe for command")
}
err = cmd.Start()
if err != nil {
return errors.WithMessage(err, "start command")
}
stdoutData, err := io.ReadAll(stdout)
if err != nil {
return errors.WithMessage(err, "read stdout data of command")
}
stderrData, err := io.ReadAll(stderr)
if err != nil {
return errors.WithMessage(err, "read stderr data of command")
}
err = cmd.Wait()
logger.Infof("copy/execCommand: exec command '%s %s': stdout: %s", cmdName, strings.Join(args, " "), stdoutData)
logger.Infof("copy/execCommand: exec command '%s %s': stderr: %s", cmdName, strings.Join(args, " "), stderrData)
if err != nil {
match, regexpErr := regexp.Match("(?i)No such file or directory", stderrData)
if regexpErr != nil {
logger.Errorf("copy/execCommand: failed to detect if cp error is caused by unknown source: %v", regexpErr)
}
if match {
return ErrUnknownSource
}
return errors.WithMessage(err, "execute command failed")
}
return nil
}