pm/meta.go

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package pm
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import (
"errors"
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"fmt"
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"net/url"
)
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// Meta tracks metadata for a package
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type Meta struct {
Name Name `json:"name"`
Version Version `json:"version"`
Description string `json:"description"`
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Remote url.URL `json:"remote"`
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}
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// Valid validates the contents of a Meta for requires fields.
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func (m Meta) Valid() (bool, error) {
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if m.Name == "" {
return false, errors.New("name cannot be empty")
}
if m.Version == "" {
return false, errors.New("version cannot be empty")
}
if m.Description == "" {
return false, errors.New("description cannot be empty")
}
return true, nil
}
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// Pkg returns the string name the .pkg should have on disk.
func (m Meta) Pkg() string {
return fmt.Sprintf("%s-%s.pkg", m.Name, m.Version)
}
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// URL returns the http location of this package.
func (m Meta) URL() string {
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return fmt.Sprintf("%s/%s", m.Remote.String(), m.Pkg())
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}
func (m Meta) String() string {
return m.URL()
}
// Metas is a slice of Meta
type Metas []Meta