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// Command r2-pdata2json converts pdata to JSON.
package main
import (
"encoding/json"
"fmt"
"io"
"os"
"strings"
"github.com/r2northstar/atlas/pkg/pdata"
"github.com/spf13/pflag"
)
var opt struct {
Compact bool
Invert bool
Filter []string
Help bool
}
func init() {
pflag.BoolVarP(&opt.Compact, "compact", "c", false, "Don't format json")
pflag.BoolVarP(&opt.Invert, "invert", "v", false, "Use filter to include instead of exclude")
pflag.StringSliceVarP(&opt.Filter, "filter", "e", nil, "Exclude pdef fields (use . to select nested fields)")
pflag.BoolVarP(&opt.Help, "help", "h", false, "Show this help text")
}
func main() {
pflag.Parse()
if pflag.NArg() > 1 || opt.Help {
fmt.Printf("usage: %s [options] [file|-]\n\noptions:\n%s\npdef version: %d\n", os.Args[0], pflag.CommandLine.FlagUsages(), pdata.Version)
if opt.Help {
os.Exit(2)
}
os.Exit(0)
}
var err error
var buf []byte
if pflag.NArg() == 1 && pflag.Arg(0) != "-" {
buf, err = os.ReadFile(pflag.Arg(0))
} else {
buf, err = io.ReadAll(os.Stdin)
}
if err != nil {
fmt.Fprintf(os.Stderr, "error: read pdata: %v\n", err)
os.Exit(1)
}
var pd pdata.Pdata
if err := pd.UnmarshalBinary(buf); err != nil {
fmt.Fprintf(os.Stderr, "error: parse pdata: %v\n", err)
os.Exit(1)
}
jbuf, err := pd.MarshalJSONFilter(mkfilter(opt.Invert, opt.Filter...))
if err != nil {
fmt.Fprintf(os.Stderr, "error: encode json: %v\n", err)
os.Exit(1)
}
var fbuf []byte
if opt.Compact {
fbuf, err = json.Marshal(json.RawMessage(jbuf))
} else {
fbuf, err = json.MarshalIndent(json.RawMessage(jbuf), "", " ")
}
if err != nil {
fmt.Fprintf(os.Stderr, "error: format json: %v\n", err)
os.Exit(1)
}
fmt.Fprintln(os.Stdout, string(fbuf))
}
func mkfilter(invert bool, filter ...string) func(path ...string) bool {
if len(filter) == 0 {
return nil
}
// this is completely unoptimized (n^m^o), but this tool is just for testing, so whatever
return func(path ...string) bool {
if !invert {
pj := strings.Join(path, ".") + "."
for _, f := range filter {
f += "."
if strings.HasPrefix(pj, f) {
return false // filter is an exact march for the path
}
}
return true
}
pj := strings.Join(path, ".") + "."
for _, f := range filter {
f += "."
if strings.HasPrefix(pj, f) {
return true // filter is an exact match for the path
}
if strings.HasPrefix(f, pj) {
return true // a parent of the filter is an exact match for the path
}
}
return false
}
}
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