Merge pull request #3958 from greatroar/errors
errors: Drop Cause in favor of Go 1.13 error handling
This commit is contained in:
commit
f9d4e0c2af
7 changed files with 34 additions and 58 deletions
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@ -1197,7 +1197,7 @@ func TestRestoreFilter(t *testing.T) {
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if ok, _ := filter.Match(pat, filepath.Base(testFile.name)); !ok {
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if ok, _ := filter.Match(pat, filepath.Base(testFile.name)); !ok {
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rtest.OK(t, err)
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rtest.OK(t, err)
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} else {
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} else {
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rtest.Assert(t, os.IsNotExist(errors.Cause(err)),
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rtest.Assert(t, os.IsNotExist(err),
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"expected %v to not exist in restore step %v, but it exists, err %v", testFile.name, i+1, err)
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"expected %v to not exist in restore step %v, but it exists, err %v", testFile.name, i+1, err)
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}
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}
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}
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}
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@ -1283,15 +1283,15 @@ func TestRestoreLatest(t *testing.T) {
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testRunRestoreLatest(t, env.gopts, filepath.Join(env.base, "restore1"), []string{filepath.Dir(p1)}, nil)
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testRunRestoreLatest(t, env.gopts, filepath.Join(env.base, "restore1"), []string{filepath.Dir(p1)}, nil)
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rtest.OK(t, testFileSize(p1rAbs, int64(102)))
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rtest.OK(t, testFileSize(p1rAbs, int64(102)))
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if _, err := os.Stat(p2rAbs); os.IsNotExist(errors.Cause(err)) {
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if _, err := os.Stat(p2rAbs); os.IsNotExist(err) {
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rtest.Assert(t, os.IsNotExist(errors.Cause(err)),
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rtest.Assert(t, os.IsNotExist(err),
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"expected %v to not exist in restore, but it exists, err %v", p2rAbs, err)
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"expected %v to not exist in restore, but it exists, err %v", p2rAbs, err)
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}
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}
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testRunRestoreLatest(t, env.gopts, filepath.Join(env.base, "restore2"), []string{filepath.Dir(p2)}, nil)
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testRunRestoreLatest(t, env.gopts, filepath.Join(env.base, "restore2"), []string{filepath.Dir(p2)}, nil)
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rtest.OK(t, testFileSize(p2rAbs, int64(103)))
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rtest.OK(t, testFileSize(p2rAbs, int64(103)))
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if _, err := os.Stat(p1rAbs); os.IsNotExist(errors.Cause(err)) {
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if _, err := os.Stat(p1rAbs); os.IsNotExist(err) {
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rtest.Assert(t, os.IsNotExist(errors.Cause(err)),
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rtest.Assert(t, os.IsNotExist(err),
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"expected %v to not exist in restore, but it exists, err %v", p1rAbs, err)
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"expected %v to not exist in restore, but it exists, err %v", p1rAbs, err)
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}
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}
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}
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}
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@ -1861,7 +1861,7 @@ func TestHardLink(t *testing.T) {
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datafile := filepath.Join("testdata", "test.hl.tar.gz")
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datafile := filepath.Join("testdata", "test.hl.tar.gz")
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fd, err := os.Open(datafile)
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fd, err := os.Open(datafile)
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if os.IsNotExist(errors.Cause(err)) {
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if os.IsNotExist(err) {
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t.Skipf("unable to find data file %q, skipping", datafile)
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t.Skipf("unable to find data file %q, skipping", datafile)
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return
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return
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}
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}
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@ -184,7 +184,14 @@ func (be *b2Backend) HasAtomicReplace() bool {
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// IsNotExist returns true if the error is caused by a non-existing file.
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// IsNotExist returns true if the error is caused by a non-existing file.
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func (be *b2Backend) IsNotExist(err error) bool {
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func (be *b2Backend) IsNotExist(err error) bool {
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return b2.IsNotExist(errors.Cause(err))
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// blazer/b2 does not export its error types and values,
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// so we can't use errors.{As,Is}.
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for ; err != nil; err = errors.Unwrap(err) {
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if b2.IsNotExist(err) {
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return true
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}
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}
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return false
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}
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}
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// Load runs fn with a reader that yields the contents of the file at h at the
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// Load runs fn with a reader that yields the contents of the file at h at the
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@ -386,7 +393,7 @@ func (be *b2Backend) Delete(ctx context.Context) error {
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}
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}
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}
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}
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err := be.Remove(ctx, restic.Handle{Type: restic.ConfigFile})
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err := be.Remove(ctx, restic.Handle{Type: restic.ConfigFile})
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if err != nil && b2.IsNotExist(errors.Cause(err)) {
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if err != nil && be.IsNotExist(err) {
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err = nil
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err = nil
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}
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}
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@ -174,13 +174,8 @@ func (be *Backend) IsNotExist(err error) bool {
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return true
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return true
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}
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}
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if er, ok := err.(*googleapi.Error); ok {
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var gerr *googleapi.Error
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if er.Code == 404 {
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return errors.As(err, &gerr) && gerr.Code == 404
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return true
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}
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}
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return false
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}
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}
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// Join combines path components with slashes.
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// Join combines path components with slashes.
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@ -71,7 +71,7 @@ var backendFilename = regexp.MustCompile(fmt.Sprintf("^[a-fA-F0-9]{%d}$", backen
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func hasBackendFile(ctx context.Context, fs Filesystem, dir string) (bool, error) {
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func hasBackendFile(ctx context.Context, fs Filesystem, dir string) (bool, error) {
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entries, err := fs.ReadDir(ctx, dir)
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entries, err := fs.ReadDir(ctx, dir)
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if err != nil && fs.IsNotExist(errors.Cause(err)) {
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if err != nil && fs.IsNotExist(err) {
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return false, nil
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return false, nil
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}
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}
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@ -1,9 +1,8 @@
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package errors
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package errors
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import (
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import (
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"net/url"
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stderrors "errors"
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"github.com/cenkalti/backoff/v4"
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"github.com/pkg/errors"
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"github.com/pkg/errors"
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)
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)
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@ -29,29 +28,10 @@ var WithMessage = errors.WithMessage
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var WithStack = errors.WithStack
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var WithStack = errors.WithStack
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// Cause returns the cause of an error. It will also unwrap certain errors,
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// e.g. *url.Error returned by the net/http client.
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func Cause(err error) error {
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type Causer interface {
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Cause() error
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}
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for {
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switch e := err.(type) {
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case Causer: // github.com/pkg/errors
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err = e.Cause()
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case *backoff.PermanentError:
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err = e.Err
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case *url.Error:
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err = e.Err
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default:
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return err
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}
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}
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}
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// Go 1.13-style error handling.
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// Go 1.13-style error handling.
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func As(err error, tgt interface{}) bool { return errors.As(err, tgt) }
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func As(err error, tgt interface{}) bool { return stderrors.As(err, tgt) }
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func Is(x, y error) bool { return errors.Is(x, y) }
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func Is(x, y error) bool { return stderrors.Is(x, y) }
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func Unwrap(err error) error { return stderrors.Unwrap(err) }
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@ -1,6 +1,9 @@
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package errors
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package errors
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import "fmt"
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import (
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"errors"
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"fmt"
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)
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// fatalError is an error that should be printed to the user, then the program
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// fatalError is an error that should be printed to the user, then the program
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// should exit with an error code.
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// should exit with an error code.
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@ -10,31 +13,19 @@ func (e fatalError) Error() string {
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return string(e)
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return string(e)
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}
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}
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func (e fatalError) Fatal() bool {
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return true
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}
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// Fataler is an error which should be printed to the user directly.
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// Afterwards, the program should exit with an error.
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type Fataler interface {
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Fatal() bool
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}
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// IsFatal returns true if err is a fatal message that should be printed to the
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// IsFatal returns true if err is a fatal message that should be printed to the
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// user. Then, the program should exit.
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// user. Then, the program should exit.
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func IsFatal(err error) bool {
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func IsFatal(err error) bool {
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// unwrap "Wrap" method
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var fatal fatalError
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err = Cause(err)
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return errors.As(err, &fatal)
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e, ok := err.(Fataler)
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return ok && e.Fatal()
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}
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}
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// Fatal returns a wrapped error which implements the Fataler interface.
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// Fatal returns an error that is marked fatal.
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func Fatal(s string) error {
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func Fatal(s string) error {
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return Wrap(fatalError(s), "Fatal")
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return Wrap(fatalError(s), "Fatal")
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}
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}
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// Fatalf returns an error which implements the Fataler interface.
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// Fatalf returns an error that is marked fatal.
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func Fatalf(s string, data ...interface{}) error {
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func Fatalf(s string, data ...interface{}) error {
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return Wrap(fatalError(fmt.Sprintf(s, data...)), "Fatal")
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return Wrap(fatalError(fmt.Sprintf(s, data...)), "Fatal")
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}
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}
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@ -64,6 +64,9 @@ type Backend interface {
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// IsNotExist returns true if the error was caused by a non-existing file
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// IsNotExist returns true if the error was caused by a non-existing file
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// in the backend.
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// in the backend.
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//
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// The argument may be a wrapped error. The implementation is responsible
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// for unwrapping it.
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IsNotExist(err error) bool
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IsNotExist(err error) bool
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// Delete removes all data in the backend.
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// Delete removes all data in the backend.
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