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package internal
import (
"bytes"
"context"
"encoding/json"
"fmt"
"os"
"os/exec"
)
// Zilch returns the zero value of a given type.
func Zilch[T any]() T { return *new(T) }
func RunJSON[T any](ctx context.Context, program string, args ...any) (T, error) {
exePath, err := exec.LookPath(program)
if err != nil {
return Zilch[T](), fmt.Errorf("can't find %s: %w", program, err)
}
var argStr []string
for _, arg := range args {
argStr = append(argStr, fmt.Sprint(arg))
}
var stdout bytes.Buffer
var stderr bytes.Buffer
cmd := exec.CommandContext(ctx, exePath, argStr...)
cmd.Stdout = &stdout
cmd.Stderr = &stderr
if err := cmd.Run(); err != nil {
os.Stderr.Write(stderr.Bytes())
return Zilch[T](), fmt.Errorf("can't run %s: %w", program, err)
}
var result T
if err := json.NewDecoder(&stdout).Decode(&result); err != nil {
return Zilch[T](), fmt.Errorf("can't decode json: %w", err)
}
return result, nil
}
|
