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validation.go
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validation.go
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package tlc
import (
"fmt"
"strings"
"github.com/pkg/errors"
)
type humanPrintable interface {
ToString() string
}
// Validate verifies that the container doesn't contain wildly invalid
// stuff, like a directory and a file having the same name
func (container *Container) Validate() error {
paths := make(map[string]humanPrintable)
type errorBuffer struct {
errors []string
}
buf := errorBuffer{}
dup := func(a humanPrintable, b humanPrintable) {
buf.errors = append(buf.errors, fmt.Sprintf("Two entries have the same name:\n%s\n%s", a.ToString(), b.ToString()))
}
for _, curr := range container.Files {
if previous, ok := paths[curr.Path]; ok {
dup(previous, curr)
}
paths[curr.Path] = curr
}
for _, curr := range container.Symlinks {
if previous, ok := paths[curr.Path]; ok {
dup(previous, curr)
}
paths[curr.Path] = curr
}
for _, curr := range container.Dirs {
if previous, ok := paths[curr.Path]; ok {
dup(previous, curr)
}
paths[curr.Path] = curr
}
if len(buf.errors) > 0 {
return errors.New("Invalid container, found the following problems:\n" + strings.Join(buf.errors, "\n\n"))
}
return nil
}