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folder_delete.go
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/
folder_delete.go
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package vaku
import (
"context"
"errors"
"golang.org/x/sync/errgroup"
)
var (
// ErrFolderDelete when FolderDelete fails.
ErrFolderDelete = errors.New("folder delete")
)
// FolderDelete recursively deletes the provided path and all subpaths.
func (c *Client) FolderDelete(ctx context.Context, p string) error {
err := c.folderDeleteWithFunc(ctx, p, c.PathDelete)
if err != nil {
return newWrapErr(p, ErrFolderDelete, err)
}
return nil
}
func (c *Client) folderDeleteWithFunc(ctx context.Context, p string, deleteF func(string) error) error {
// eg manages workers reading from the paths channel
eg, ctx := errgroup.WithContext(ctx)
// list the path
pathC, errC := c.FolderListChan(ctx, p)
eg.Go(func() error {
err := <-errC
if err != nil {
return err
}
return nil
})
// fan out and process paths
for i := 0; i < c.workers; i++ {
eg.Go(func() error {
return c.folderDeleteWork(&folderDeleteWorkInput{
ctx: ctx,
root: p,
pathC: pathC,
deleteF: deleteF,
})
})
}
return eg.Wait() //nolint:wrapcheck
}
// folderDeleteWorkInput is the piecces needed to list a folder.
type folderDeleteWorkInput struct {
ctx context.Context
root string
pathC <-chan string
deleteF func(string) error
}
// folderDeleteWork takes input from pathC, lists the path, adds listed folders back into pathC, and
// adds non-folders into results.
func (c *Client) folderDeleteWork(i *folderDeleteWorkInput) error {
for {
select {
case <-i.ctx.Done():
return ctxErr(i.ctx.Err())
case path, ok := <-i.pathC:
if !ok {
return nil
}
path = c.inputPath(path, i.root)
err := i.deleteF(path)
if err != nil {
return err
}
return nil
}
}
}