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feat: Add read-only support for existing tar archives from GNU tar

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This commit is contained in:
Felicitas Pojtinger
2022-01-25 02:12:36 +01:00
parent 247bd37756
commit 9814937e2d
1 changed files with 5 additions and 1 deletions
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6
pkg/persisters/metadata.go
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@@ -511,7 +511,7 @@ func (p *MetadataPersister) headerExistsExact(ctx context.Context, name string)
func (p *MetadataPersister) getSanitizedPath(ctx context.Context, name string) string {
// If root is queried, return actual root
if pathext.IsRoot(name, false) {
if pathext.IsRoot(name, false) || name == p.root {
return p.root
}
@@ -537,8 +537,12 @@ func (p *MetadataPersister) getSanitizedPath(ctx context.Context, name string) s
prefix = ""
} else if p.root == "." {
prefix = "."
} else if p.root == "./" {
return "./" + strings.TrimPrefix(strings.TrimPrefix(name, "./"), "/") // // If the root path is "./"; this is `tar`s default behaviour if . is the source
} else if p.root == "/" {
prefix = "/"
} else if !(strings.HasPrefix(p.root, "/") || strings.HasPrefix(p.root, "./")) { // If the root path is relative, but does not start with "./"; this is `tar`s default behaviour if ${PWD} is the source
return name
} else {
return "./" + filepath.Clean(strings.TrimPrefix(name, "/")) // Special case: There is no root directory, only files, and the files start with `./`
}