jschoubben
61aa338887
mesh-checking-program -verdict reads the facts from the file the build seat's run step names, judges them with the rules package and answers one versioned line; facts of a version it does not read are refused, naming it, because the running checker of B0 runs G's programs (milestone 47/B0, ADR 0644, ADR 0656). Claude-Session: https://claude.ai/code/session_01NcbgfFSnn24M3GcqttoU7i
60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// Command mesh-checking-program is the checker's checking program (novox/hq ADR 0644, ADR 0656; design 47's bootstrap
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// delivery): built from a check's heads and run in the build seat's sandbox through the seat node-build-go's ask run,
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// with no network and no bus account, it reads the check's facts from the file MESH_RUN_INPUT names and answers the
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// verdict the judging rules give them, as one JSON line on its standard output (rules.Answer).
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//
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// mesh-checking-program -verdict
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//
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// It refuses facts of a version it does not read, naming it, with exit 2.
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package main
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import (
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"encoding/json"
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"flag"
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"fmt"
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"io"
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"os"
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"git.novox.be/novox/mesh-sdk/go/delivery"
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"mesh-delivery-checker/rules"
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)
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func main() {
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os.Exit(run(os.Args[1:], os.Getenv, os.Stdout, os.Stderr))
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}
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// run is the command over its arguments, environment and outputs, answering its exit.
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func run(args []string, getenv func(string) string, stdout, stderr io.Writer) int {
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fs := flag.NewFlagSet("mesh-checking-program", flag.ContinueOnError)
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fs.SetOutput(stderr)
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verdict := fs.Bool("verdict", false, "answer the verdict of the facts in the input")
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if err := fs.Parse(args); err != nil {
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return 2
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}
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refuse := func(format string, a ...any) int {
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fmt.Fprintf(stderr, "mesh-checking-program: "+format+"\n", a...)
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return 2
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}
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if !*verdict {
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return refuse("nothing asked: give -verdict")
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}
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file := getenv(delivery.RunInputEnv)
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if file == "" {
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return refuse("no input: %s names no file", delivery.RunInputEnv)
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}
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data, err := os.ReadFile(file)
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if err != nil {
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return refuse("the input cannot be read: %v", err)
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}
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facts, err := rules.DecodeFacts(data)
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if err != nil {
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return refuse("%v", err)
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}
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line, err := json.Marshal(rules.Answer{V: rules.AnswerVersion, Verdict: rules.Judge(facts)})
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if err != nil {
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return refuse("the verdict cannot be written: %v", err)
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}
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fmt.Fprintf(stdout, "%s\n", line)
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return 0
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}
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