Add new flags for setting hard limits on kopia cache(PR#1) (#2409)

* add cache hard limit flags

* add cache structure

* remove test changes

Signed-off-by: Amruta Kale <amruta.kale@veeam.com>

* remove soft limit fields from the struct as we are not setting it

Signed-off-by: Amruta Kale <amruta.kale@veeam.com>

* move the unused function to child PR where the function is already used

Signed-off-by: Amruta Kale <amruta.kale@veeam.com>

* add copyright headers to cache.go

Signed-off-by: Amruta Kale <amruta.kale@veeam.com>

---------

Signed-off-by: Amruta Kale <amruta.kale@veeam.com>

pkg/kopia/command/cache.go

@@ -0,0 +1,22 @@
+// Copyright 2023 The Kanister Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package command
+
+// CacheArgs has fields that can be used to set
+// cache settings for different kopia repository operations
+type CacheArgs struct {
+	ContentCacheLimitMB  int
+	MetadataCacheLimitMB int
+}

pkg/kopia/command/common.go

@@ -77,9 +77,11 @@ func ExecKopiaArgs(configFilePath string) []string {
 }
 
 const (
-	cacheDirectoryFlag      = "--cache-directory"
-	contentCacheSizeMBFlag  = "--content-cache-size-mb"
-	metadataCacheSizeMBFlag = "--metadata-cache-size-mb"
+	cacheDirectoryFlag           = "--cache-directory"
+	contentCacheSizeMBFlag       = "--content-cache-size-mb"
+	metadataCacheSizeMBFlag      = "--metadata-cache-size-mb"
+	contentCacheSizeLimitMBFlag  = "--content-cache-size-limit-mb"
+	metadataCacheSizeLimitMBFlag = "--metadata-cache-size-limit-mb"
 )
 
 func kopiaCacheArgs(args logsafe.Cmd, cacheDirectory string, contentCacheMB, metadataCacheMB int) logsafe.Cmd {