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Add a generic Walk()'er to list a bucket, optinally prefix (#9026)

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This generic Walk() is used by likes of Lifecyle, or
KMS to rotate keys or any other functionality which
relies on this functionality.
This commit is contained in:
Harshavardhana
2020-02-25 21:22:28 +05:30
committed by GitHub
parent ece0d4ac53
commit 23a8411732
24 changed files with 296 additions and 140 deletions
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4
cmd/tree-walk.go
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@@ -59,7 +59,7 @@ func filterMatchingPrefix(entries []string, prefixEntry string) []string {
type ListDirFunc func(bucket, prefixDir, prefixEntry string) (entries []string)
// treeWalk walks directory tree recursively pushing TreeWalkResult into the channel as and when it encounters files.
func doTreeWalk(ctx context.Context, bucket, prefixDir, entryPrefixMatch, marker string, recursive bool, listDir ListDirFunc, resultCh chan TreeWalkResult, endWalkCh chan struct{}, isEnd bool) (totalNum int, treeErr error) {
func doTreeWalk(ctx context.Context, bucket, prefixDir, entryPrefixMatch, marker string, recursive bool, listDir ListDirFunc, resultCh chan TreeWalkResult, endWalkCh <-chan struct{}, isEnd bool) (totalNum int, treeErr error) {
// Example:
// if prefixDir="one/two/three/" and marker="four/five.txt" treeWalk is recursively
// called with prefixDir="one/two/three/four/" and marker="five.txt"
@@ -151,7 +151,7 @@ func doTreeWalk(ctx context.Context, bucket, prefixDir, entryPrefixMatch, marker
}
// Initiate a new treeWalk in a goroutine.
func startTreeWalk(ctx context.Context, bucket, prefix, marker string, recursive bool, listDir ListDirFunc, endWalkCh chan struct{}) chan TreeWalkResult {
func startTreeWalk(ctx context.Context, bucket, prefix, marker string, recursive bool, listDir ListDirFunc, endWalkCh <-chan struct{}) chan TreeWalkResult {
// Example 1
// If prefix is "one/two/three/" and marker is "one/two/three/four/five.txt"
// treeWalk is called with prefixDir="one/two/three/" and marker="four/five.txt"