ci: add golint (#212)

.golangci.yml

@@ -7,6 +7,7 @@ linters:
     - exportloopref
     - gofmt
     - goimports
+    - golint
     - goprintffuncname
     - gosimple
     - govet
@@ -21,3 +22,7 @@ linters:
     - unconvert
     - unused
     - varcheck
+
+issues:
+  include:
+    - EXC0002 # disable excluding of issues about comments from golint

tikv/batch_getter.go

@@ -62,6 +62,7 @@ func NewBufferBatchGetter(buffer BatchBufferGetter, snapshot BatchGetter) *Buffe
 	return &BufferBatchGetter{buffer: buffer, snapshot: snapshot}
 }
 
+// BatchGet gets a batch of values.
 func (b *BufferBatchGetter) BatchGet(ctx context.Context, keys [][]byte) (map[string][]byte, error) {
 	if b.buffer.Len() == 0 {
 		return b.snapshot.BatchGet(ctx, keys)

tikv/gc.go

@@ -28,19 +28,19 @@ import (
 	zap "go.uber.org/zap"
 )
 
-/// GC does garbage collection (GC) of the TiKV cluster.
-/// GC deletes MVCC records whose timestamp is lower than the given `safepoint`. We must guarantee
-///  that all transactions started before this timestamp had committed. We can keep an active
-/// transaction list in application to decide which is the minimal start timestamp of them.
-///
-/// For each key, the last mutation record (unless it's a deletion) before `safepoint` is retained.
-///
-/// GC is performed by:
-/// 1. resolving all locks with timestamp <= `safepoint`
-/// 2. updating PD's known safepoint
-///
-/// This is a simplified version of [GC in TiDB](https://docs.pingcap.com/tidb/stable/garbage-collection-overview).
-/// We skip the second step "delete ranges" which is an optimization for TiDB.
+// GC does garbage collection (GC) of the TiKV cluster.
+// GC deletes MVCC records whose timestamp is lower than the given `safepoint`. We must guarantee
+//  that all transactions started before this timestamp had committed. We can keep an active
+// transaction list in application to decide which is the minimal start timestamp of them.
+//
+// For each key, the last mutation record (unless it's a deletion) before `safepoint` is retained.
+//
+// GC is performed by:
+// 1. resolving all locks with timestamp <= `safepoint`
+// 2. updating PD's known safepoint
+//
+// GC is a simplified version of [GC in TiDB](https://docs.pingcap.com/tidb/stable/garbage-collection-overview).
+// We skip the second step "delete ranges" which is an optimization for TiDB.
 func (s *KVStore) GC(ctx context.Context, safepoint uint64) (newSafePoint uint64, err error) {
 	err = s.resolveLocks(ctx, safepoint, 8)
 	if err != nil {