// verifyAncestry verifies that the Thrift file for the given module and the
// Thrift files for all imported modules are contained within the directory
// tree rooted at the given path.
func verifyAncestry(m *compile.Module, root string) error {
return m.Walk(func(m *compile.Module) error {
path, err := filepath.Rel(root, m.ThriftPath)
if err != nil {
return fmt.Errorf(
"could not resolve path for %q: %v", m.ThriftPath, err)
}
if strings.HasPrefix(path, "..") {
return fmt.Errorf(
"%q is not contained in the %q directory tree",
m.ThriftPath, root)
}
return nil
})
}
// findCommonAncestor finds the deepest common ancestor for the given module
// and all modules imported by it.
func findCommonAncestor(m *compile.Module) (string, error) {
var result []string
var lastString string
err := m.Walk(func(m *compile.Module) error {
thriftPath := m.ThriftPath
if !filepath.IsAbs(thriftPath) {
return fmt.Errorf(
"ThriftPath must be absolute: %q is not absolute", thriftPath)
}
thriftDir := filepath.Dir(thriftPath)
// Split("/foo/bar", "/") = ["", "foo", "bar"]
parts := strings.Split(thriftDir, string(filepath.Separator))
if result == nil {
result = parts
lastString = thriftPath
return nil
}
result = commonPrefix(result, parts)
if len(result) == 1 && result[0] == "" {
return fmt.Errorf(
"%q does not share an ancestor with %q",
thriftPath, lastString)
}
lastString = thriftPath
return nil
})
if err != nil {
return "", err
}
return strings.Join(result, string(filepath.Separator)), nil
}