Thales Maciel
4930d82cb9
Make host-integrated VM features fit a standard Go extension path instead of adding more one-off branches through vm.go. This is the enabling refactor for future work like shared mounts, not the /work feature itself. Add a daemon capability pipeline plus a structured guest-config builder, then move the existing /root work-disk mount, built-in DNS, and NAT wiring onto those hooks. Generalize Firecracker drive config at the same time so later storage features can extend machine setup without another hardcoded path. Add banger doctor on top of the shared readiness checks, update the docs to describe the new architecture, and cover the new seams with guest-config, capability, report, CLI, and full go test verification. Also verify make build and a real ./banger doctor run on the host.
121 lines
2.7 KiB
Go
121 lines
2.7 KiB
Go
package system
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import (
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"errors"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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type Preflight struct {
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problems []string
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}
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func NewPreflight() *Preflight {
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return &Preflight{}
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}
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func (p *Preflight) RequireCommand(name, hint string) {
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value := strings.TrimSpace(name)
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if value == "" {
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p.add("command name is not configured%s", formatHint(hint))
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return
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}
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if _, err := exec.LookPath(value); err != nil {
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p.add("required command %q not found%s", value, formatHint(hint))
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}
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}
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func (p *Preflight) RequireExecutable(pathOrName, label, hint string) {
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value := strings.TrimSpace(pathOrName)
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if value == "" {
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p.add("%s is not configured%s", label, formatHint(hint))
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return
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}
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if strings.ContainsRune(value, filepath.Separator) {
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info, err := os.Stat(value)
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if err != nil {
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p.add("%s not found at %s%s", label, value, formatHint(hint))
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return
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}
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if info.IsDir() || info.Mode()&0o111 == 0 {
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p.add("%s is not executable at %s%s", label, value, formatHint(hint))
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}
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return
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}
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if _, err := exec.LookPath(value); err != nil {
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p.add("missing %s %q%s", label, value, formatHint(hint))
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}
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}
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func (p *Preflight) RequireFile(path, label, hint string) {
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value := strings.TrimSpace(path)
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if value == "" {
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p.add("%s is not configured%s", label, formatHint(hint))
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return
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}
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info, err := os.Stat(value)
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if err != nil {
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p.add("%s not found at %s%s", label, value, formatHint(hint))
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return
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}
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if info.IsDir() {
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p.add("%s expected a file at %s%s", label, value, formatHint(hint))
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}
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}
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func (p *Preflight) RequireDir(path, label, hint string) {
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value := strings.TrimSpace(path)
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if value == "" {
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p.add("%s is not configured%s", label, formatHint(hint))
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return
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}
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info, err := os.Stat(value)
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if err != nil {
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p.add("%s not found at %s%s", label, value, formatHint(hint))
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return
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}
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if !info.IsDir() {
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p.add("%s expected a directory at %s%s", label, value, formatHint(hint))
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}
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}
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func (p *Preflight) Addf(format string, args ...any) {
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p.add(format, args...)
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}
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func (p *Preflight) Problems() []string {
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if len(p.problems) == 0 {
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return nil
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}
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out := make([]string, len(p.problems))
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copy(out, p.problems)
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return out
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}
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func (p *Preflight) Err(prefix string) error {
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if len(p.problems) == 0 {
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return nil
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}
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var builder strings.Builder
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builder.WriteString(strings.TrimSpace(prefix))
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for _, problem := range p.problems {
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builder.WriteString("\n- ")
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builder.WriteString(problem)
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}
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return errors.New(builder.String())
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}
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func (p *Preflight) add(format string, args ...any) {
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p.problems = append(p.problems, fmt.Sprintf(format, args...))
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}
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func formatHint(hint string) string {
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hint = strings.TrimSpace(hint)
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if hint == "" {
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return ""
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}
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return " (" + hint + ")"
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}
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