etcdctl: add support for filtering by {min,max} x {create,mod} x {revision}

Signed-off-by: Cristian Ferretti <jcferretti2020@gmail.com>

etcdctl/README.md

@@ -125,6 +125,14 @@ RPC: Range
 
 - keys-only -- Get only the keys
 
+- max-create-revision -- restrict results to kvs with create revision lower or equal than the supplied revision
+
+- min-create-revision -- restrict results to kvs with create revision greater or equal than the supplied revision
+
+- max-mod-revision -- restrict results to kvs with modified revision lower or equal than the supplied revision
+
+- min-mod-revision -- restrict results to kvs with modified revision greater or equal than the supplied revision
+
 #### Output
 Prints the data in format below,
 ```

etcdctl/ctlv3/command/get_command.go

@@ -25,16 +25,20 @@ import (
 )
 
 var (
-	getConsistency string
+	getConsistency  string
-	getLimit       int64
+	getLimit        int64
-	getSortOrder   string
+	getSortOrder    string
-	getSortTarget  string
+	getSortTarget   string
-	getPrefix      bool
+	getPrefix       bool
-	getFromKey     bool
+	getFromKey      bool
-	getRev         int64
+	getRev          int64
-	getKeysOnly    bool
+	getKeysOnly     bool
-	getCountOnly   bool
+	getCountOnly    bool
-	printValueOnly bool
+	printValueOnly  bool
+	getMinCreateRev int64
+	getMaxCreateRev int64
+	getMinModRev    int64
+	getMaxModRev    int64
 )
 
 // NewGetCommand returns the cobra command for "get".
@@ -55,6 +59,10 @@ func NewGetCommand() *cobra.Command {
 	cmd.Flags().BoolVar(&getKeysOnly, "keys-only", false, "Get only the keys")
 	cmd.Flags().BoolVar(&getCountOnly, "count-only", false, "Get only the count")
 	cmd.Flags().BoolVar(&printValueOnly, "print-value-only", false, `Only write values when using the "simple" output format`)
+	cmd.Flags().Int64Var(&getMinCreateRev, "min-create-rev", 0, "Minimum create revision")
+	cmd.Flags().Int64Var(&getMaxCreateRev, "max-create-rev", 0, "Maximum create revision")
+	cmd.Flags().Int64Var(&getMinModRev, "min-mod-rev", 0, "Minimum modification revision")
+	cmd.Flags().Int64Var(&getMaxModRev, "max-mod-rev", 0, "Maximum modification revision")
 
 	cmd.RegisterFlagCompletionFunc("consistency", func(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
 		return []string{"l", "s"}, cobra.ShellCompDirectiveDefault
@@ -184,5 +192,29 @@ func getGetOp(args []string) (string, []clientv3.OpOption) {
 		opts = append(opts, clientv3.WithCountOnly())
 	}
 
+	if getMinCreateRev > 0 {
+		opts = append(opts, clientv3.WithMinCreateRev(getMinCreateRev))
+	}
+
+	if getMaxCreateRev > 0 {
+		if getMinCreateRev > getMaxCreateRev {
+			cobrautl.ExitWithError(cobrautl.ExitBadFeature,
+				fmt.Errorf("getMinCreateRev(=%v) > getMaxCreateRev(=%v)", getMinCreateRev, getMaxCreateRev))
+		}
+		opts = append(opts, clientv3.WithMaxCreateRev(getMaxCreateRev))
+	}
+
+	if getMinModRev > 0 {
+		opts = append(opts, clientv3.WithMinModRev(getMinModRev))
+	}
+
+	if getMaxModRev > 0 {
+		if getMinModRev > getMaxModRev {
+			cobrautl.ExitWithError(cobrautl.ExitBadFeature,
+				fmt.Errorf("getMinModRev(=%v) > getMaxModRev(=%v)", getMinModRev, getMaxModRev))
+		}
+		opts = append(opts, clientv3.WithMaxModRev(getMaxModRev))
+	}
+
 	return key, opts
 }

tests/e2e/ctl_v3_kv_test.go

@@ -37,10 +37,11 @@ func TestCtlV3PutIgnoreLease(t *testing.T) { testCtl(t, putTestIgnoreLease) }
 
 func TestCtlV3GetTimeout(t *testing.T) { testCtl(t, getTest, withDefaultDialTimeout()) }
 
-func TestCtlV3GetFormat(t *testing.T)    { testCtl(t, getFormatTest) }
+func TestCtlV3GetFormat(t *testing.T)             { testCtl(t, getFormatTest) }
-func TestCtlV3GetRev(t *testing.T)       { testCtl(t, getRevTest) }
+func TestCtlV3GetRev(t *testing.T)                { testCtl(t, getRevTest) }
-func TestCtlV3GetKeysOnly(t *testing.T)  { testCtl(t, getKeysOnlyTest) }
+func TestCtlV3GetMinMaxCreateModRev(t *testing.T) { testCtl(t, getMinMaxCreateModRevTest) }
-func TestCtlV3GetCountOnly(t *testing.T) { testCtl(t, getCountOnlyTest) }
+func TestCtlV3GetKeysOnly(t *testing.T)           { testCtl(t, getKeysOnlyTest) }
+func TestCtlV3GetCountOnly(t *testing.T)          { testCtl(t, getCountOnlyTest) }
 
 func TestCtlV3DelTimeout(t *testing.T) { testCtl(t, delTest, withDefaultDialTimeout()) }
 
@@ -216,6 +217,39 @@ func getRevTest(cx ctlCtx) {
 	}
 }
 
+func getMinMaxCreateModRevTest(cx ctlCtx) {
+	var (
+		kvs = []kv{ //     revision:   store | key create | key modify
+			{"key1", "val1"}, //     2         2           2
+			{"key2", "val2"}, //     3         3           3
+			{"key1", "val3"}, //     4         2           4
+			{"key4", "val4"}, //     5         5           5
+		}
+	)
+	for i := range kvs {
+		if err := ctlV3Put(cx, kvs[i].key, kvs[i].val, ""); err != nil {
+			cx.t.Fatalf("getRevTest #%d: ctlV3Put error (%v)", i, err)
+		}
+	}
+
+	tests := []struct {
+		args []string
+
+		wkv []kv
+	}{
+		{[]string{"key", "--prefix", "--max-create-rev", "3"}, []kv{kvs[1], kvs[2]}},
+		{[]string{"key", "--prefix", "--min-create-rev", "3"}, []kv{kvs[1], kvs[3]}},
+		{[]string{"key", "--prefix", "--max-mod-rev", "3"}, []kv{kvs[1]}},
+		{[]string{"key", "--prefix", "--min-mod-rev", "4"}, kvs[2:]},
+	}
+
+	for i, tt := range tests {
+		if err := ctlV3Get(cx, tt.args, tt.wkv...); err != nil {
+			cx.t.Errorf("getMinModRevTest #%d: ctlV3Get error (%v)", i, err)
+		}
+	}
+}
+
 func getKeysOnlyTest(cx ctlCtx) {
 	if err := ctlV3Put(cx, "key", "val", ""); err != nil {
 		cx.t.Fatal(err)