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package importer
import (
"bytes"
"context"
"log/slog"
"net/url"
"os"
"path"
"searchix/internal/config"
"searchix/internal/file"
"searchix/internal/index"
"github.com/pkg/errors"
)
type NixpkgsChannelImporter struct {
DataPath string
Source *config.Source
Logger *slog.Logger
}
func makeChannelURL(channel string, subPath string) (string, error) {
url, err := url.JoinPath("https://channels.nixos.org/", channel, subPath)
return url, errors.WithMessagef(err, "error creating URL")
}
var filesToFetch = map[string]string{
"revision": "git-revision",
"options": "options.json.br",
}
func (i *NixpkgsChannelImporter) FetchIfNeeded(parent context.Context) (bool, error) {
ctx, cancel := context.WithTimeout(parent, i.Source.FetchTimeout)
defer cancel()
root := i.DataPath
err := file.Mkdirp(root)
if err != nil {
return false, errors.WithMessagef(err, "error creating directory for data: %s", root)
}
for _, filename := range filesToFetch {
url, err := makeChannelURL(i.Source.Channel, filename)
if err != nil {
return false, err
}
path := path.Join(root, filename)
updated, err := fetchFileIfNeeded(ctx, path, url)
if err != nil {
return false, err
}
// don't bother to issue requests for the later files
if !updated {
return false, err
}
}
return true, nil
}
func (i *NixpkgsChannelImporter) Import(
parent context.Context,
indexer *index.WriteIndex,
) (bool, error) {
filename := path.Join(i.DataPath, filesToFetch["options"])
revFilename := path.Join(i.DataPath, filesToFetch["revision"])
bits, err := os.ReadFile(revFilename)
if err != nil {
return false, errors.WithMessagef(err, "unable to read revision file at %s", revFilename)
}
i.Source.Repo.Revision = string(bytes.TrimSpace(bits))
i.Logger.Debug("preparing import run", "revision", i.Source.Repo.Revision, "filename", filename)
return processOptions(parent, indexer, &importConfig{
Source: i.Source,
Filename: filename,
Logger: i.Logger,
})
}
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