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assets_fetcher.go
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/
assets_fetcher.go
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// Copyright (c) 2022 Gobalsky Labs Limited
//
// Use of this software is governed by the Business Source License included
// in the LICENSE file and at https://www.mariadb.com/bsl11.
//
// Change Date: 18 months from the later of the date of the first publicly
// available Distribution of this version of the repository, and 25 June 2022.
//
// On the date above, in accordance with the Business Source License, use
// of this software will be governed by version 3 or later of the GNU General
// Public License.
package github
import (
"context"
"fmt"
"io/ioutil"
"net/http"
"os"
"path"
"path/filepath"
"time"
"code.vegaprotocol.io/vega/visor/utils"
"github.com/google/go-github/v50/github"
"golang.org/x/sync/errgroup"
)
const zipMimeType = "application/zip"
type AssetsFetcher struct {
repositoryOwner string
repository string
assetNames map[string]struct{}
*github.Client
}
func NewAssetsFetcher(
repositoryOwner, repository string,
assetsNames []string,
) *AssetsFetcher {
return &AssetsFetcher{
repositoryOwner: repositoryOwner,
repository: repository,
assetNames: utils.ToLookupMap(assetsNames),
Client: github.NewClient(nil),
}
}
func (af *AssetsFetcher) GetReleaseID(ctx context.Context, releaseTag string) (int64, error) {
releases, _, err := af.Client.Repositories.ListReleases(ctx, af.repositoryOwner, af.repository, nil)
if err != nil {
return 0, err
}
for _, r := range releases {
if *r.TagName == releaseTag {
return r.GetID(), nil
}
}
return 0, fmt.Errorf("release tag %q not found", releaseTag)
}
func (af *AssetsFetcher) GetAssets(ctx context.Context, releaseID int64) ([]*github.ReleaseAsset, error) {
assets, _, err := af.Client.Repositories.ListReleaseAssets(ctx, af.repositoryOwner, af.repository, releaseID, nil)
if err != nil {
return nil, err
}
var filteredAssets []*github.ReleaseAsset
for _, asset := range assets {
if _, ok := af.assetNames[asset.GetName()]; ok {
filteredAssets = append(filteredAssets, asset)
}
}
return filteredAssets, nil
}
func (af *AssetsFetcher) DownloadAsset(ctx context.Context, assetID int64, assetType, path string) error {
followClient := &http.Client{Timeout: time.Second * 120}
ra, _, err := af.Client.Repositories.DownloadReleaseAsset(ctx, af.repositoryOwner, af.repository, assetID, followClient)
if err != nil {
return fmt.Errorf("failed to download release asset: %w", err)
}
defer ra.Close()
all, err := ioutil.ReadAll(ra)
if err != nil {
return fmt.Errorf("failed to read %q: %w", path, err)
}
if err := os.WriteFile(path, all, 0o770); err != nil {
return fmt.Errorf("failed to write to %q: %w", path, err)
}
if assetType == zipMimeType {
if err := utils.UnzipSource(path, filepath.Dir(path)); err != nil {
return fmt.Errorf("failed to unzip asset: %w", err)
}
}
return nil
}
func (af *AssetsFetcher) Download(ctx context.Context, releaseTag, downloadDir string) error {
releaseID, err := af.GetReleaseID(ctx, releaseTag)
if err != nil {
return fmt.Errorf("failed to get release ID for tag %q: %q", releaseTag, err)
}
assetIDs, err := af.GetAssets(ctx, releaseID)
if err != nil {
return fmt.Errorf("failed to get assets ID for tag %q: %q", releaseTag, err)
}
eg, ctx := errgroup.WithContext(ctx)
for _, asset := range assetIDs {
assetID := asset.GetID()
assetName := asset.GetName()
assetType := asset.GetContentType()
eg.Go(func() error {
if err := af.DownloadAsset(ctx, assetID, assetType, path.Join(downloadDir, assetName)); err != nil {
return fmt.Errorf("failed to download asset %q of type %q for tag %q: %w", assetName, releaseTag, assetType, err)
}
return nil
})
}
return eg.Wait()
}