mirror of https://github.com/databricks/cli.git
35 lines
859 B
Go
35 lines
859 B
Go
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package filer
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import (
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"fmt"
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"path"
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"strings"
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)
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// RootPath can be joined with a relative path and ensures that
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// the returned path is always a strict child of the root path.
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type RootPath struct {
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rootPath string
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}
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// NewRootPath constructs and returns [RootPath].
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// The named path is cleaned on construction.
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func NewRootPath(name string) RootPath {
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return RootPath{
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rootPath: path.Clean(name),
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}
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}
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// Join returns the specified path name joined to the root.
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// It returns an error if the resulting path is not a strict child of the root path.
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func (p *RootPath) Join(name string) (string, error) {
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absPath := path.Join(p.rootPath, name)
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// Don't allow escaping the specified root using relative paths.
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if !strings.HasPrefix(absPath, p.rootPath) {
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return "", fmt.Errorf("relative path escapes root: %s", name)
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}
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return absPath, nil
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}
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