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[Go] Added Results.ToDOT, and cmd/todot utility
Signed-off-by: Andrea Barberio <insomniac@slackware.it>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| /* SPDX-License-Identifier: BSD-2-Clause */ | ||
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| package main | ||
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| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "go/build" | ||
| "log" | ||
| "os" | ||
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| flag "github.com/spf13/pflag" | ||
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| "github.com/insomniacslk/dublin-traceroute/go/dublintraceroute/results" | ||
| ) | ||
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| func init() { | ||
| // Ensure that CGO is disabled | ||
| var ctx build.Context | ||
| if ctx.CgoEnabled { | ||
| fmt.Println("Disabling CGo") | ||
| ctx.CgoEnabled = false | ||
| } | ||
| } | ||
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| var ( | ||
| flagOutputFile = flag.StringP("output", "o", "-", "Output file. Use \"-\" to print to standard output") | ||
| ) | ||
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| func main() { | ||
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| flag.Parse() | ||
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| if len(flag.Args()) != 1 { | ||
| log.Fatal("Missing JSON file name") | ||
| } | ||
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| buf, err := os.ReadFile(flag.Arg(0)) | ||
| if err != nil { | ||
| log.Fatalf("Failed to read file '%s': %v", flag.Arg(0), err) | ||
| } | ||
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| var result results.Results | ||
| if err := json.Unmarshal(buf, &result); err != nil { | ||
| log.Fatalf("Failed to unmarshal JSON into Results: %v", err) | ||
| } | ||
| output, err := result.ToDOT() | ||
| if err != nil { | ||
| log.Fatalf("Failed to convert to DOT: %v", err) | ||
| } | ||
| if *flagOutputFile == "-" { | ||
| fmt.Println(output) | ||
| } else { | ||
| err := os.WriteFile(*flagOutputFile, []byte(output), 0644) | ||
| if err != nil { | ||
| log.Fatalf("Failed to write DOT file: %v", err) | ||
| } | ||
| log.Printf("Saved DOT file to %s", *flagOutputFile) | ||
| log.Printf("Run `dot -Tpng \"%s\" -o \"%s.png\"` to convert to PNG", *flagOutputFile, *flagOutputFile) | ||
| } | ||
| } |
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