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// Copyright (C) 2022 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package main
import (
"bufio"
"io"
"os"
"git.lukeshu.com/go/lowmemjson"
"github.com/datawire/dlib/dlog"
"github.com/datawire/ocibuild/pkg/cliutil"
"github.com/spf13/cobra"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfs/btrfsvol"
"git.lukeshu.com/btrfs-progs-ng/lib/btrfsprogs/btrfsinspect/rebuildnodes"
)
func init() {
inspectors = append(inspectors, subcommand{
Command: cobra.Command{
Use: "rebuild-nodes NODESCAN.json",
Args: cliutil.WrapPositionalArgs(cobra.ExactArgs(1)),
},
RunE: func(fs *btrfs.FS, cmd *cobra.Command, args []string) error {
ctx := cmd.Context()
dlog.Infof(ctx, "Reading %q...", args[0])
nodeScanResults, err := readScanResults(args[0])
if err != nil {
return err
}
dlog.Infof(ctx, "... done reading %q", args[0])
rebuiltNodes, err := rebuildnodes.RebuildNodes(ctx, fs, nodeScanResults)
if err != nil {
return err
}
dlog.Info(ctx, "Writing re-built nodes to stdout...")
if err := writeNodesJSON(os.Stdout, rebuiltNodes); err != nil {
return err
}
dlog.Info(ctx, "... done writing")
return nil
},
})
}
func writeNodesJSON(w io.Writer, rebuiltNodes map[btrfsvol.LogicalAddr]*rebuildnodes.RebuiltNode) (err error) {
buffer := bufio.NewWriter(w)
defer func() {
if _err := buffer.Flush(); err == nil && _err != nil {
err = _err
}
}()
return lowmemjson.Encode(&lowmemjson.ReEncoder{
Out: buffer,
Indent: "\t",
ForceTrailingNewlines: true,
}, rebuiltNodes)
}
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