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httpdl/cli: drop --auto-split; classify errors by type, not message text

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Two Pike cleanups.

--auto-split was a got-only third connection-count policy (beside -x and -s)
that invented rather than matched aria2. Removing it also retires the now-dead
autoConns/maxAutoConns and the per-host transport cap that existed only to scale
for it; min(split, M*-x) is the sole policy again.

main's exit-code mapping fell back to substring-matching third-party error text
(strings.Contains "connection refused"/"timeout"/...), which rots when a
dependency rewords a message. The typed checks (errors.Is on the syscall errno,
*net.DNSError, net.Error.Timeout, context.DeadlineExceeded) already cover the
real stdlib errors -- verified end to end: refused -> 6, bad host -> 19. The two
cases that genuinely needed the text match are our own errors, now typed
sentinels: httpdl.ErrTimeout (idle timeout) and the bt metadata timeout wrapping
context.DeadlineExceeded.
This commit is contained in:
Hojun-Cho
2026-06-20 23:55:39 +09:00
parent 270812de3e
commit 81c44d9ec7
8 changed files with 27 additions and 108 deletions
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8
main_test.go
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@@ -69,16 +69,14 @@ func TestExitCode(t *testing.T) {
err error
want int
}{
{"idle timeout", errors.New("idle timeout: no data received"), 2},
{"metadata timed out", errors.New("timed out fetching metadata after 3s"), 2},
{"idle timeout", fmt.Errorf("segment 0: %w (after 1m0s)", httpdl.ErrTimeout), 2},
{"metadata timed out", fmt.Errorf("timed out fetching metadata after 3s: %w", context.DeadlineExceeded), 2},
{"deadline", context.DeadlineExceeded, 2},
{"file exists", fmt.Errorf("/tmp/x: %w (use --allow-overwrite or -c)", httpdl.ErrOutputExists), 13},
{"dns typed", dnsErr, 19},
{"dns wrapped through retries", fmt.Errorf("http://x: %w (after 5 tries)", dnsErr), 19},
{"dns by message", errors.New("dial tcp: lookup nope.invalid: no such host"), 19},
{"refused typed", refused, 6},
{"refused wrapped through retries", fmt.Errorf("http://x: %w (after 5 tries)", refused), 6},
{"refused by message", errors.New("dial tcp 127.0.0.1:1: connect: connection refused"), 6},
{"not found", fmt.Errorf("%w: http://x/y: 404 Not Found", httpdl.ErrNotFound), 3},
{"too slow", fmt.Errorf("http://x: %w (<= %d bytes/sec)", httpdl.ErrTooSlow, 1024), 5},
{"checksum", fmt.Errorf("/tmp/x: %w (want a, got b)", httpdl.ErrChecksum), 32},
@@ -227,7 +225,7 @@ func TestFollowUpInfoHashDedup(t *testing.T) {
func TestReportExit(t *testing.T) {
canceled := download.Result{Name: "a", Err: context.Canceled}
done := download.Result{Name: "b", Err: nil}
timeout := download.Result{Name: "c", Err: errors.New("idle timeout")}
timeout := download.Result{Name: "c", Err: httpdl.ErrTimeout}
tests := []struct {
name string