*: fix golangci-lint issues and delete unused code#5037
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📝 WalkthroughWalkthroughRepository-wide consistency changes: replace direct error cause checks/type assertions with wrapped-aware ChangesRepository-wide consistency changes
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~20 minutes Possibly related PRs
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Code Review
This pull request refactors error handling across several modules, replacing direct error comparisons and type assertions with more robust errors.Is and errors.As patterns, typically using the cerror wrapper. It also cleans up a duplicate line in expr_filter.go and adds a lint suppression in subscription_client.go. The review feedback identifies several instances where the use of errors.Cause(err) is redundant because cerror.Is and cerror.As already handle error unwrapping, and also points out an indentation issue in api_client.go. Addressing these suggestions will improve code idiomaticity and maintainability.
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🧹 Nitpick comments (5)
tests/integration_tests/bank/case.go (1)
564-564: ⚡ Quick winRemove redundant
errors.Cause()unwrapping beforecerror.Is()check.The pattern
cerror.Is(errors.Cause(err), context.Canceled)is redundant becausecerror.Is()already traverses the error chain to detect cancellation in wrapped errors. Usecerror.Is(err, context.Canceled)directly.♻️ Simplify error check
err := workload() - if err != nil && !cerror.Is(errors.Cause(err), context.Canceled) { + if err != nil && !cerror.Is(err, context.Canceled) { log.Warn("workload failed", zap.Error(err)) }🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@tests/integration_tests/bank/case.go` at line 564, The error check is using redundant unwrapping with errors.Cause(err) before calling cerror.Is; update the condition to call cerror.Is(err, context.Canceled) directly (leave the surrounding if logic intact) so the wrapped error chain is correctly inspected without the extra errors.Cause() call; change the expression involving cerror.Is and errors.Cause to use cerror.Is(err, context.Canceled) referencing the existing err variable and context.Canceled symbol.pkg/pdutil/api_client.go (2)
366-366: ⚡ Quick winRemove redundant
errors.Cause()unwrapping beforecerror.Is()check.Same issue as line 190:
cerror.Is()already traverses the error chain, so unwrapping witherrors.Cause()first is redundant.♻️ Simplify error check
}, retry.WithMaxTries(defaultMaxRetry), retry.WithIsRetryableErr(func(err error) bool { - if cerror.Is(errors.Cause(err), context.Canceled) { + if cerror.Is(err, context.Canceled) { return false } return true🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@pkg/pdutil/api_client.go` at line 366, The check at cerror.Is(errors.Cause(err), context.Canceled) is redundant because cerror.Is already walks the error chain; change the call to use the original error (cerror.Is(err, context.Canceled)) instead of wrapping with errors.Cause(err); apply the same simplification used earlier (see the similar pattern around the code that referenced line 190) to remove unnecessary unwrapping and keep error-chain-aware checks in functions in api_client.go.
190-193: ⚡ Quick winRemove redundant
errors.Cause()unwrapping beforecerror.Is()check.The pattern
cerror.Is(errors.Cause(err), context.Canceled)is redundant becausecerror.Is()already traverses the error chain to match wrapped errors. Usecerror.Is(err, context.Canceled)directly.♻️ Simplify error check
retry.WithIsRetryableErr(func(err error) bool { - if cerror.Is(errors.Cause(err), context.Canceled) { + if cerror.Is(err, context.Canceled) { return false } return true }))🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@pkg/pdutil/api_client.go` around lines 190 - 193, The error check currently calls cerror.Is(errors.Cause(err), context.Canceled) which redundantly unwraps the error; change it to call cerror.Is(err, context.Canceled) directly (keeping the same behavior for the variable err and the context.Canceled sentinel) and remove any now-unused errors.Cause import if it becomes unused.pkg/sink/codec/csv/csv_decoder.go (1)
113-113: ⚡ Quick winRemove redundant
errors.Cause()unwrapping beforeerrors.Is()check.The pattern
errors.Is(errors.Cause(err), io.EOF)is redundant becauseerrors.Is()already traverses the error chain to match EOF in wrapped errors. Useerrors.Is(err, io.EOF)directly.♻️ Simplify EOF check
- if errors.Is(errors.Cause(err), io.EOF) { + if errors.Is(err, io.EOF) { return common.MessageTypeUnknown, false }🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@pkg/sink/codec/csv/csv_decoder.go` at line 113, Replace the redundant errors.Is(errors.Cause(err), io.EOF) check with errors.Is(err, io.EOF) in the CSV decoder code: locate the EOF handling in pkg/sink/codec/csv/csv_decoder.go where the variable err is being checked and change the call to use errors.Is(err, io.EOF) directly (no errors.Cause unwrap) so the error chain is properly inspected without redundant unwrapping.pkg/orchestrator/etcd_worker_test.go (1)
275-276: ⚡ Quick winRemove redundant
errors.Cause()unwrapping beforecerrors.Is()check.The pattern
cerrors.Is(errors.Cause(err), target)is redundant becausecerrors.Is()already traverses the error chain to match wrapped errors. Unwrapping witherrors.Cause()first defeats the purpose of using the wrapped-error-awareIs()check.♻️ Simplify error checks
- if err != nil && (cerrors.Is(errors.Cause(err), context.DeadlineExceeded) || - cerrors.Is(errors.Cause(err), context.Canceled) || + if err != nil && (cerrors.Is(err, context.DeadlineExceeded) || + cerrors.Is(err, context.Canceled) || strings.Contains(err.Error(), "etcdserver: request timeout")) { return }🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@pkg/orchestrator/etcd_worker_test.go` around lines 275 - 276, The error checks unnecessarily call errors.Cause(err) before cerrors.Is, which is redundant because cerrors.Is already walks wrapped errors; update the conditional in the test to call cerrors.Is(err, context.DeadlineExceeded) and cerrors.Is(err, context.Canceled) (and any other cerrors.Is checks) directly instead of cerrors.Is(errors.Cause(err), ...), leaving the rest of the logic in the function (the conditional around err) unchanged.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Nitpick comments:
In `@pkg/orchestrator/etcd_worker_test.go`:
- Around line 275-276: The error checks unnecessarily call errors.Cause(err)
before cerrors.Is, which is redundant because cerrors.Is already walks wrapped
errors; update the conditional in the test to call cerrors.Is(err,
context.DeadlineExceeded) and cerrors.Is(err, context.Canceled) (and any other
cerrors.Is checks) directly instead of cerrors.Is(errors.Cause(err), ...),
leaving the rest of the logic in the function (the conditional around err)
unchanged.
In `@pkg/pdutil/api_client.go`:
- Line 366: The check at cerror.Is(errors.Cause(err), context.Canceled) is
redundant because cerror.Is already walks the error chain; change the call to
use the original error (cerror.Is(err, context.Canceled)) instead of wrapping
with errors.Cause(err); apply the same simplification used earlier (see the
similar pattern around the code that referenced line 190) to remove unnecessary
unwrapping and keep error-chain-aware checks in functions in api_client.go.
- Around line 190-193: The error check currently calls
cerror.Is(errors.Cause(err), context.Canceled) which redundantly unwraps the
error; change it to call cerror.Is(err, context.Canceled) directly (keeping the
same behavior for the variable err and the context.Canceled sentinel) and remove
any now-unused errors.Cause import if it becomes unused.
In `@pkg/sink/codec/csv/csv_decoder.go`:
- Line 113: Replace the redundant errors.Is(errors.Cause(err), io.EOF) check
with errors.Is(err, io.EOF) in the CSV decoder code: locate the EOF handling in
pkg/sink/codec/csv/csv_decoder.go where the variable err is being checked and
change the call to use errors.Is(err, io.EOF) directly (no errors.Cause unwrap)
so the error chain is properly inspected without redundant unwrapping.
In `@tests/integration_tests/bank/case.go`:
- Line 564: The error check is using redundant unwrapping with errors.Cause(err)
before calling cerror.Is; update the condition to call cerror.Is(err,
context.Canceled) directly (leave the surrounding if logic intact) so the
wrapped error chain is correctly inspected without the extra errors.Cause()
call; change the expression involving cerror.Is and errors.Cause to use
cerror.Is(err, context.Canceled) referencing the existing err variable and
context.Canceled symbol.
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logservice/logpuller/subscription_client.gopkg/filter/expr_filter.gopkg/messaging/message_center.gopkg/orchestrator/etcd_worker_test.gopkg/pdutil/api_client.gopkg/redo/reader/file.gopkg/sink/codec/common/helper.gopkg/sink/codec/csv/csv_decoder.gopkg/sink/kafka/options_test.gotests/integration_tests/bank/case.gotests/integration_tests/many_pk_or_uk/main.go
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- pkg/filter/expr_filter.go
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🧹 Nitpick comments (2)
pkg/sink/codec/common/helper.go (1)
328-329: ⚡ Quick winSimplify error type checking for consistency.
Line 329 calls
errors.Cause(err)beforeerrors.As, buterrors.Asalready unwraps errors internally per Go 1.13+ semantics. This is redundant and inconsistent with line 272 inqueryRowChecksumAux, which correctly useserrors.As(err, &mysqlErr)directly.♻️ Proposed fix to remove redundant unwrapping
var mysqlErr *mysqlDriver.MySQLError - ok := errors.As(errors.Cause(err), &mysqlErr) + ok := errors.As(err, &mysqlErr)🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@pkg/sink/codec/common/helper.go` around lines 328 - 329, Replace the redundant unwrapping call in the MySQL error type check: instead of calling errors.As(errors.Cause(err), &mysqlErr) (where mysqlErr is a *mysqlDriver.MySQLError), call errors.As(err, &mysqlErr) directly so the built-in unwrapping semantics are used consistently (as done in queryRowChecksumAux); update the check in helper.go accordingly.pkg/sink/kafka/options_test.go (1)
834-835: ⚡ Quick winSimplify error type checking.
Line 835 calls
errors.Cause(err)beforeerrors.As, buterrors.Asalready unwraps errors internally per Go 1.13+ semantics. The redundanterrors.Causecall is unnecessary.♻️ Proposed fix to remove redundant unwrapping
var numError *strconv.NumError - ok := errors.As(errors.Cause(err), &numError) + ok := errors.As(err, &numError)🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@pkg/sink/kafka/options_test.go` around lines 834 - 835, The test currently does redundant unwrapping by calling errors.Cause(err) before errors.As; update the check that declares var numError *strconv.NumError and the call ok := errors.As(errors.Cause(err), &numError) to call errors.As directly on err (i.e., ok := errors.As(err, &numError)), relying on Go's built-in unwrapping semantics so strconv.NumError is detected correctly without errors.Cause.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Nitpick comments:
In `@pkg/sink/codec/common/helper.go`:
- Around line 328-329: Replace the redundant unwrapping call in the MySQL error
type check: instead of calling errors.As(errors.Cause(err), &mysqlErr) (where
mysqlErr is a *mysqlDriver.MySQLError), call errors.As(err, &mysqlErr) directly
so the built-in unwrapping semantics are used consistently (as done in
queryRowChecksumAux); update the check in helper.go accordingly.
In `@pkg/sink/kafka/options_test.go`:
- Around line 834-835: The test currently does redundant unwrapping by calling
errors.Cause(err) before errors.As; update the check that declares var numError
*strconv.NumError and the call ok := errors.As(errors.Cause(err), &numError) to
call errors.As directly on err (i.e., ok := errors.As(err, &numError)), relying
on Go's built-in unwrapping semantics so strconv.NumError is detected correctly
without errors.Cause.
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Makefiledownstreamadapter/sink/pulsar/helper.godownstreamadapter/sink/topicmanager/kafka_topic_manager.godownstreamadapter/sink/topicmanager/pulsar_topic_manager.godownstreamadapter/sink/topicmanager/pulsar_topic_manager_mock.godownstreamadapter/sink/topicmanager/pulsar_topic_manager_test.gopkg/errors/reexport.gopkg/messaging/message_center.gopkg/orchestrator/etcd_worker_test.gopkg/pdutil/api_client.gopkg/redo/reader/file.gopkg/sink/codec/common/helper.gopkg/sink/kafka/options_test.go
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- downstreamadapter/sink/topicmanager/pulsar_topic_manager.go
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Actionable comments posted: 1
🧹 Nitpick comments (1)
pkg/check/active_active_tso_indexes.go (1)
173-173: ⚡ Quick winConsider using predefined errors for better categorization.
These validation errors currently use generic
errors.Neworerrors.Errorf. For consistency and better error handling, consider defining predefined errors for:
- Inconsistent TSO index values across TiDB instances (lines 173, 186)
- Missing required TSO config keys (lines 196, 199)
This would enable callers to distinguish between different failure modes using
errors.Is().Also applies to: 186-186, 196-196, 199-199
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@pkg/check/active_active_tso_indexes.go` at line 173, Define package-level sentinel errors (e.g., var ErrInconsistentTSOIndex = errors.New("inconsistent tso-unique-index across TiDB instances") and var ErrMissingTSOConfigKey = errors.New("missing required tso config key")) in pkg/check/active_active_tso_indexes.go and replace the ad-hoc errors.New/Errorsf returns that currently use the literal messages (for example the return using "downstream TiDB reports inconsistent tso-unique-index across instances" and the returns using "missing required tso config key") to return or wrap those sentinel errors; where additional context (like which key) is helpful, wrap the sentinel with fmt.Errorf("%w: key=%s", ErrMissingTSOConfigKey, key) so callers can use errors.Is() to detect ErrInconsistentTSOIndex and ErrMissingTSOConfigKey.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@pkg/sink/mysql/helper.go`:
- Around line 206-209: Replace the direct sentinel comparison against
sql.ErrNoRows with an errors.Is check: in the block where
db.QueryRowContext(...).Scan(&name, &value) is called (the session variable
lookup using variableName), change the condition `err != nil && err !=
sql.ErrNoRows` to use `errors.Is(err, sql.ErrNoRows)` so wrapped ErrNoRows is
handled correctly; update the conditional to `if err != nil && !errors.Is(err,
sql.ErrNoRows) { ... }` (same error wrapping via ErrMySQLQueryError stays
unchanged).
---
Nitpick comments:
In `@pkg/check/active_active_tso_indexes.go`:
- Line 173: Define package-level sentinel errors (e.g., var
ErrInconsistentTSOIndex = errors.New("inconsistent tso-unique-index across TiDB
instances") and var ErrMissingTSOConfigKey = errors.New("missing required tso
config key")) in pkg/check/active_active_tso_indexes.go and replace the ad-hoc
errors.New/Errorsf returns that currently use the literal messages (for example
the return using "downstream TiDB reports inconsistent tso-unique-index across
instances" and the returns using "missing required tso config key") to return or
wrap those sentinel errors; where additional context (like which key) is
helpful, wrap the sentinel with fmt.Errorf("%w: key=%s", ErrMissingTSOConfigKey,
key) so callers can use errors.Is() to detect ErrInconsistentTSOIndex and
ErrMissingTSOConfigKey.
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Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
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📒 Files selected for processing (55)
.golangci.ymlapi/status/status.gocmd/cdc/cli/cli_changefeed_helper.gocmd/storage-consumer/consumer.gocmd/storage-consumer/main.gocoordinator/controller.gocoordinator/coordinator_test.godownstreamadapter/dispatchermanager/dispatcher_manager_redo.godownstreamadapter/dispatchermanager/helper.godownstreamadapter/sink/blackhole/sink.godownstreamadapter/sink/pulsar/ddl_producer.godownstreamadapter/sink/pulsar/dml_producer.godownstreamadapter/sink/pulsar/mock_producer.godownstreamadapter/sink/pulsar/sink.godownstreamadapter/sink/redo/sink.godownstreamadapter/sink/topicmanager/kafka_topic_manager.godownstreamadapter/sink/topicmanager/pulsar_topic_manager.gologservice/coordinator/coordinator.gologservice/eventstore/event_store.gologservice/logpuller/subscription_client.gomaintainer/testutil/test_util.gopkg/check/active_active_tso_indexes.gopkg/common/log_coordinator.gopkg/diff/checkpoint.gopkg/diff/diff.gopkg/encryption/tikv_http_client.gopkg/errors/helper.gopkg/errors/utils.gopkg/etcd/client.gopkg/eventservice/event_scanner.gopkg/filter/expr_filter.gopkg/filter/utils.gopkg/httputil/httputil.gopkg/logger/log.gopkg/messaging/remote_target.gopkg/redo/reader/file.gopkg/redo/reader/reader.gopkg/retry/retry_test.gopkg/sink/codec/bootstraper.gopkg/sink/kafka/claimcheck/claim_check.gopkg/sink/mysql/config.gopkg/sink/mysql/helper.gopkg/sink/mysql/mysql_writer.gopkg/sink/mysql/mysql_writer_ddl.gopkg/sink/mysql/mysql_writer_dml_exec.gopkg/sink/mysql/mysql_writer_for_active_active_sync_stats.gopkg/sink/mysql/mysql_writer_for_ddl_ts.gopkg/sink/mysql/progress_table_writer.gopkg/sink/mysql/progress_table_writer_test.gopkg/sink/mysql/sql_builder_test.gopkg/tcpserver/tcp_server.gopkg/upstream/manager.gopkg/util/json_writer.gopkg/version/check.gotests/integration_tests/bank/case.go
✅ Files skipped from review due to trivial changes (14)
- downstreamadapter/sink/pulsar/sink.go
- downstreamadapter/sink/pulsar/dml_producer.go
- api/status/status.go
- pkg/sink/codec/bootstraper.go
- downstreamadapter/sink/pulsar/ddl_producer.go
- maintainer/testutil/test_util.go
- pkg/common/log_coordinator.go
- downstreamadapter/sink/blackhole/sink.go
- pkg/sink/mysql/mysql_writer_for_ddl_ts.go
- downstreamadapter/sink/pulsar/mock_producer.go
- logservice/eventstore/event_store.go
- pkg/util/json_writer.go
- pkg/sink/kafka/claimcheck/claim_check.go
- downstreamadapter/dispatchermanager/helper.go
🚧 Files skipped from review as they are similar to previous changes (21)
- downstreamadapter/sink/topicmanager/pulsar_topic_manager.go
- cmd/storage-consumer/main.go
- pkg/httputil/httputil.go
- pkg/diff/checkpoint.go
- pkg/sink/mysql/mysql_writer_ddl.go
- coordinator/controller.go
- logservice/coordinator/coordinator.go
- pkg/diff/diff.go
- pkg/sink/mysql/mysql_writer_for_active_active_sync_stats.go
- pkg/redo/reader/reader.go
- downstreamadapter/sink/topicmanager/kafka_topic_manager.go
- pkg/logger/log.go
- cmd/storage-consumer/consumer.go
- downstreamadapter/sink/redo/sink.go
- coordinator/coordinator_test.go
- pkg/tcpserver/tcp_server.go
- pkg/filter/utils.go
- pkg/retry/retry_test.go
- pkg/errors/utils.go
- pkg/sink/mysql/mysql_writer.go
- pkg/redo/reader/file.go
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: tenfyzhong, wk989898 The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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Issue Number: ref #5032
What problem does this PR solve?
Fix multiple categories of golangci-lint issues reported by
make check-static, reducing the total from ~300 to ~250.What is changed and how it works?
Auto-fixes (ineffassign, nilerr):
expr_filter.go: remove duplicateFillVirtualColumnValuecallconsumer.go: remove deadtableNameassignmentdrop_event.go: remove deadoffset += 8before returnfile.go:return nil→return errmysql_writer_ddl.go:return nil→return errpool_test.go:return nil→return errerrorlint — use errors.Is/errors.As instead of ==/type-assertion (12 files):
message_center.go:err != context.DeadlineExceeded→!pkgerror.Is(err, context.DeadlineExceeded)etcd_worker_test.go:== context.DeadlineExceeded→cerrors.Is(..., context.DeadlineExceeded)api_client.go:switch { case context.Canceled }→if cerror.Is(..., context.Canceled), simplifiedif-then-return→return !cerror.Is(...)file.go:err != io.EOF→!cerror.Is(err, io.EOF)csv_decoder.go:err == io.EOF→errors.Is(err, io.EOF)bank/case.go:!= context.Canceled→!cerror.Is(..., context.Canceled)helper.go,many_pk_or_uk/main.go,options_test.go: type assertions →errors.Asincrement-decrement (7 files):
controller.go,dml_event.go,csv_decoder.go,helper.go,sync_point.goetc.:+= 1→++,-= 1→--unused code deletion (14 files):
stream.go: removestreamWrappertype, methods,streamGeneratorremote_target.go,errors.go,claim_check.go: remove unused consts/varscli_changefeed_helper.go: removereadInputactive_active.go: removegetSoftDeleteTimeColumnIndexmodel.go: removegetDefaultVerifyTableConfig,toCredentialbarrier_event.go,splitter.go,utils.go,message.go,thread_pool_test_task.go, etc.redefines-builtin-id:
atomic.go: renamenew→newValConfig:
.golangci.yml: suppress ST1003 (variable naming for legacy identifiers)Makefile: addlocal-static-checktarget for branch-diff lintingpkg/errors re-export:
reexport.go: addWithStack,ErrorStack,ErrorEqual,NewNoStackError,NotFoundf,NotValidf,Normalize,RFCCodeText,Unwrap,RedactLogEnabled, plus type aliasesError,RFCErrorCode,ErrCodeCheck List
Tests:
go build ./...passesCode changes:
Side effects:
Release note
Summary by CodeRabbit
Refactor
Bug Fixes
New Features
Chores