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package fetcher
import (
"context"
"fmt"
"log/slog"
"os"
"os/exec"
"path"
"searchix/internal/config"
"searchix/internal/index"
"strconv"
"strings"
"time"
"github.com/pkg/errors"
)
type ChannelFetcher struct {
Source *config.Source
SourceFile string
Logger *slog.Logger
}
func NewChannelFetcher(
source *config.Source,
logger *slog.Logger,
) (*ChannelFetcher, error) {
switch source.Importer {
case config.Options:
return &ChannelFetcher{
Source: source,
Logger: logger,
}, nil
default:
return nil, fmt.Errorf("unsupported importer type %s", source.Importer)
}
}
func (i *ChannelFetcher) FetchIfNeeded(
ctx context.Context,
sourceMeta *index.SourceMeta,
) (f FetchedFiles, err error) {
args := []string{
"--no-build-output",
"--timeout",
strconv.Itoa(int(i.Source.Timeout.Seconds() - 1)),
fmt.Sprintf("<%s/%s>", i.Source.Channel, i.Source.ImportPath),
"--attr",
i.Source.Attribute,
"--no-out-link",
}
if i.Source.URL != "" {
args = append(args, "-I", fmt.Sprintf("%s=%s", i.Source.Channel, i.Source.URL))
}
i.Logger.Debug("nix-build command", "args", args)
cmd := exec.CommandContext(ctx, "nix-build", args...)
var out []byte
out, err = cmd.Output()
if err != nil {
err = errors.WithMessage(err, "failed to run nix-build (--dry-run)")
return
}
outPath := path.Join(strings.TrimSpace(string(out)), i.Source.OutputPath, "options.json")
i.Logger.Debug(
"checking output path",
"outputPath",
outPath,
)
if outPath != sourceMeta.Path {
sourceMeta.Path = outPath
sourceMeta.Updated = time.Now().Truncate(time.Second)
}
file, err := os.Open(outPath)
if err != nil {
err = errors.WithMessage(err, "failed to open options.json")
return
}
f = FetchedFiles{
Options: file,
}
return
}
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