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Changed dumpConfig function to optionally save to file #18327

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merged 2 commits into from
Jan 7, 2019
Merged

Changed dumpConfig function to optionally save to file #18327

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fb88921
Changed dumpConfig function to optionally save to file
darcys22 Dec 18, 2018
66ed440
Added O_TRUNC flag to file open and cleaned up code
darcys22 Jan 7, 2019
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15 changes: 12 additions & 3 deletions cmd/geth/config.go
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,6 @@ import (
"bufio"
"errors"
"fmt"
"io"
"math/big"
"os"
"reflect"
Expand Down Expand Up @@ -198,7 +197,17 @@ func dumpConfig(ctx *cli.Context) error {
if err != nil {
return err
}
io.WriteString(os.Stdout, comment)
os.Stdout.Write(out)

dump := os.Stdout
if ctx.NArg() > 0 {
dump, err = os.OpenFile(ctx.Args().Get(0), os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
if err != nil {
return err
}
defer dump.Close()
}
dump.WriteString(comment)
dump.Write(out)

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Minot nitpick, might be a bit cleaner to put the stream into a variable and call the writes only once:

dump := os.Stdout
if ctx.NArg() > 0 {
	dump, err = os.OpenFile(ctx.Args().Get(0), os.O_RDWR|os.O_CREATE|O_TRUNC, 0644)
	if err != nil {
		return err
	}
	defer dump.Close()
}
dump.WriteString(comment)
dump.Write(out)

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I agree, that code looks much cleaner. I've made updates below

return nil
}