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110 lines
2.0 KiB
Go
110 lines
2.0 KiB
Go
package integration
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import (
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"bufio"
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"context"
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"fmt"
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"io"
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"os"
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"os/exec"
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"path/filepath"
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"regexp"
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"time"
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"github.com/pkg/errors"
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)
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func NewRegistry(dir string) (url string, cl func() error, err error) {
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if err := lookupBinary("registry"); err != nil {
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return "", nil, err
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}
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deferF := &multiCloser{}
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cl = deferF.F()
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defer func() {
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if err != nil {
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deferF.F()()
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cl = nil
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}
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}()
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if dir == "" {
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tmpdir, err := os.MkdirTemp("", "test-registry")
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if err != nil {
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return "", nil, err
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}
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deferF.append(func() error { return os.RemoveAll(tmpdir) })
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dir = tmpdir
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}
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if _, err := os.Stat(filepath.Join(dir, "config.yaml")); err != nil {
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if !errors.Is(err, os.ErrNotExist) {
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return "", nil, err
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}
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template := fmt.Sprintf(`version: 0.1
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loglevel: debug
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storage:
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filesystem:
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rootdirectory: %s
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http:
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addr: 127.0.0.1:0
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`, filepath.Join(dir, "data"))
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if err := os.WriteFile(filepath.Join(dir, "config.yaml"), []byte(template), 0600); err != nil {
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return "", nil, err
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}
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}
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cmd := exec.Command("registry", "serve", filepath.Join(dir, "config.yaml")) //nolint:gosec // test utility
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rc, err := cmd.StderrPipe()
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if err != nil {
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return "", nil, err
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}
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stop, err := startCmd(cmd, nil)
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if err != nil {
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return "", nil, err
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}
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deferF.append(stop)
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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url, err = detectPort(ctx, rc)
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if err != nil {
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return "", nil, err
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}
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return
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}
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func detectPort(ctx context.Context, rc io.ReadCloser) (string, error) {
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r := regexp.MustCompile(`listening on 127\.0\.0\.1:(\d+)`)
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s := bufio.NewScanner(rc)
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found := make(chan struct{})
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defer func() {
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close(found)
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go io.Copy(io.Discard, rc)
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}()
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go func() {
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select {
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case <-ctx.Done():
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select {
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case <-found:
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return
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default:
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rc.Close()
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}
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case <-found:
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}
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}()
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for s.Scan() {
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res := r.FindSubmatch(s.Bytes())
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if len(res) > 1 {
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return "localhost:" + string(res[1]), nil
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}
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}
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return "", errors.Errorf("no listening address found")
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}
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