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package pkg
import (
"context"
"crypto/sha512"
"fmt"
)
// A fileArtifact is an [Artifact] that cures into data known ahead of time.
type fileArtifact []byte
var _ KnownChecksum = fileArtifact{}
// fileArtifactNamed embeds fileArtifact alongside a caller-supplied name.
type fileArtifactNamed struct {
fileArtifact
// Caller-supplied user-facing reporting name.
name string
}
var _ fmt.Stringer = fileArtifactNamed{}
// String returns the caller-supplied reporting name.
func (a fileArtifactNamed) String() string { return a.name }
// NewFile returns a [File] that cures into a caller-supplied byte slice.
//
// Caller must not modify data after NewFile returns.
func NewFile(name string, data []byte) File {
f := fileArtifact(data)
if name != "" {
return fileArtifactNamed{f, name}
}
return f
}
// Kind returns the hardcoded [Kind] constant.
func (a fileArtifact) Kind() Kind { return KindFile }
// Params returns the result of Data.
func (a fileArtifact) Params() []byte { return a }
// Dependencies returns a nil slice.
func (a fileArtifact) Dependencies() []Artifact { return nil }
// Checksum computes and returns the checksum of caller-supplied data.
func (a fileArtifact) Checksum() Checksum {
h := sha512.New384()
h.Write(a)
return Checksum(h.Sum(nil))
}
// Cure returns the caller-supplied data.
func (a fileArtifact) Cure(context.Context) ([]byte, error) { return a, nil }
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