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Fix --files-from without --no-traverse doing a recursive scan

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In a28239f005 we made --files-from obey --no-traverse.  In the
process this caused --files-from without --no-traverse to do a
complete recursive scan unecessarily.

This was only noticeable in users of fs/march, so sync/copy/move/etc
not in ls/lsf/etc.

This fix makes sure that we use conventional directory listings in
fs/march unless `--files-from` and `--no-traverse` is set or
`--fast-list` is active.

Fixes #3619
This commit is contained in:
Nick Craig-Wood 2019-10-14 16:06:13 +01:00
parent f9f9d5029b
commit af05e290cf
2 changed files with 11 additions and 3 deletions
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9
fs/march/march.go
View File

@ -69,13 +69,18 @@ func (m *March) init() {
// list a directory into entries, err
type listDirFn func(dir string) (entries fs.DirEntries, err error)
// makeListDir makes a listing function for the given fs and includeAll flags
// makeListDir makes constructs a listing function for the given fs
// and includeAll flags for marching through the file system.
func (m *March) makeListDir(f fs.Fs, includeAll bool) listDirFn {
if (!fs.Config.UseListR || f.Features().ListR == nil) && !filter.Active.HaveFilesFrom() {
if !(fs.Config.UseListR && f.Features().ListR != nil) && // !--fast-list active and
!(fs.Config.NoTraverse && filter.Active.HaveFilesFrom()) { // !(--files-from and --no-traverse)
return func(dir string) (entries fs.DirEntries, err error) {
return list.DirSorted(m.Ctx, f, includeAll, dir)
}
}
// This returns a closure for use when --fast-list is active or for when
// --files-from and --no-traverse is set
var (
mu sync.Mutex
started bool

5
fs/walk/walk.go
View File

@ -553,12 +553,15 @@ func walkNDirTree(ctx context.Context, f fs.Fs, path string, includeAll bool, ma
//
// NB (f, path) to be replaced by fs.Dir at some point
func NewDirTree(ctx context.Context, f fs.Fs, path string, includeAll bool, maxLevel int) (dirtree.DirTree, error) {
// if --no-traverse and --files-from build DirTree just from files
if fs.Config.NoTraverse && filter.Active.HaveFilesFrom() {
return walkRDirTree(ctx, f, path, includeAll, maxLevel, filter.Active.MakeListR(ctx, f.NewObject))
}
if ListR := f.Features().ListR; (maxLevel < 0 || maxLevel > 1) && ListR != nil {
// if have ListR; and recursing; and not using --files-from; then build a DirTree with ListR
if ListR := f.Features().ListR; (maxLevel < 0 || maxLevel > 1) && ListR != nil && !filter.Active.HaveFilesFrom() {
return walkRDirTree(ctx, f, path, includeAll, maxLevel, ListR)
}
// otherwise just use List
return walkNDirTree(ctx, f, path, includeAll, maxLevel, list.DirSorted)
}