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manifest.go
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manifest.go
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package server
import (
"bytes"
"crypto/sha256"
"encoding/json"
"fmt"
"io"
"os"
"path/filepath"
"github.com/ollama/ollama/types/model"
)
type Manifest struct {
ManifestV2
Digest string `json:"-"`
}
func (m *Manifest) Size() (size int64) {
for _, layer := range append(m.Layers, m.Config) {
size += layer.Size
}
return
}
func ParseNamedManifest(name model.Name) (*Manifest, error) {
if !name.IsFullyQualified() {
return nil, model.Unqualified(name)
}
manifests, err := GetManifestPath()
if err != nil {
return nil, err
}
var manifest ManifestV2
manifestfile, err := os.Open(filepath.Join(manifests, name.Filepath()))
if err != nil {
return nil, err
}
sha256sum := sha256.New()
if err := json.NewDecoder(io.TeeReader(manifestfile, sha256sum)).Decode(&manifest); err != nil {
return nil, err
}
return &Manifest{
ManifestV2: manifest,
Digest: fmt.Sprintf("%x", sha256sum.Sum(nil)),
}, nil
}
func WriteManifest(name string, config *Layer, layers []*Layer) error {
manifest := ManifestV2{
SchemaVersion: 2,
MediaType: "application/vnd.docker.distribution.manifest.v2+json",
Config: config,
Layers: layers,
}
var b bytes.Buffer
if err := json.NewEncoder(&b).Encode(manifest); err != nil {
return err
}
modelpath := ParseModelPath(name)
manifestPath, err := modelpath.GetManifestPath()
if err != nil {
return err
}
if err := os.MkdirAll(filepath.Dir(manifestPath), 0o755); err != nil {
return err
}
return os.WriteFile(manifestPath, b.Bytes(), 0o644)
}