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