viye/internal/plumbing/shell/shell.go (view raw)
| 1 | package shell |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "fmt" |
| 6 | "os" |
| 7 | "os/exec" |
| 8 | "path/filepath" |
| 9 | "strconv" |
| 10 | "strings" |
| 11 | "syscall" |
| 12 | "time" |
| 13 | |
| 14 | "github.com/olexsmir/viye/internal/viye" |
| 15 | ) |
| 16 | |
| 17 | type Tool struct{} |
| 18 | |
| 19 | func (Tool) Name() string { return "shell($, $$, kill, mkdir)" } |
| 20 | func (Tool) Match(ctx *viye.Context) bool { |
| 21 | return isCmd(ctx) || isBGCmd(ctx) || isKill(ctx) || isMkdir(ctx) |
| 22 | } |
| 23 | |
| 24 | func (Tool) Execute(ctx *viye.Context) (string, error) { |
| 25 | switch { |
| 26 | case isCmd(ctx): |
| 27 | ctxTimeout, cancel := context.WithTimeout(context.Background(), 5*time.Second) |
| 28 | defer cancel() |
| 29 | |
| 30 | cmd := exec.CommandContext(ctxTimeout, "sh", "-c", strings.Join(ctx.Args, " ")) |
| 31 | cmd.Dir = ctx.Dir |
| 32 | out, err := cmd.CombinedOutput() |
| 33 | if err != nil { |
| 34 | if ctxTimeout.Err() == context.DeadlineExceeded { |
| 35 | return "", fmt.Errorf("timeout: command exceeded 5s") |
| 36 | } |
| 37 | } |
| 38 | return viye.FormatOutput(string(out)), nil |
| 39 | |
| 40 | case isBGCmd(ctx): |
| 41 | cmd := exec.Command("sh", "-c", strings.Join(ctx.Args, " ")) |
| 42 | cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true} |
| 43 | cmd.Dir = ctx.Dir |
| 44 | if err := cmd.Start(); err != nil { |
| 45 | return "", err |
| 46 | } |
| 47 | return fmt.Sprintf("| pid: %d", cmd.Process.Pid), nil |
| 48 | |
| 49 | case isKill(ctx): |
| 50 | pid, err := strconv.Atoi(ctx.Args[0]) |
| 51 | if err != nil { |
| 52 | return "", fmt.Errorf("kill: invalid pid %q", ctx.Args[0]) |
| 53 | } |
| 54 | p, err := os.FindProcess(pid) |
| 55 | if err != nil { |
| 56 | return "", fmt.Errorf("kill: %w", err) |
| 57 | } |
| 58 | if err := p.Kill(); err != nil { |
| 59 | return "", fmt.Errorf("kill: %w", err) |
| 60 | } |
| 61 | return "| done\n", nil |
| 62 | |
| 63 | case isMkdir(ctx): |
| 64 | path := filepath.Join(append([]string{ctx.Dir}, ctx.Args...)...) |
| 65 | if err := os.MkdirAll(path, 0o755); err != nil { |
| 66 | return "", fmt.Errorf("mkdir: %w", err) |
| 67 | } |
| 68 | return "| created " + path + "\n", nil |
| 69 | |
| 70 | default: |
| 71 | panic("shouldn't have paniced") |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | func isCmd(c *viye.Context) bool { return c.Cmd == "$" } |
| 76 | func isBGCmd(c *viye.Context) bool { return c.Cmd == "$$" } |
| 77 | func isKill(c *viye.Context) bool { return c.Cmd == "kill" && len(c.Args) == 1 } |
| 78 | func isMkdir(c *viye.Context) bool { return c.Cmd == "mkdir" && len(c.Args) >= 1 } |