95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
package execute
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// execute_pipe constructs a pipeline of execute_code and execute_tool calls
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// to enable the composition of tools and arbitrary code.
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import (
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"context"
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"encoding/json"
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"fmt"
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"strings"
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)
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// PipeStep is one stage in a tool pipeline.
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// Exactly one of Tool or Code must be set.
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type PipeStep struct {
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Tool string // named tool read from 9P (trusted)
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Code string // inline bash code (untrusted, validated)
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Args []string
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}
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// BuildPipeline constructs a single bash pipeline string from the given steps.
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// Tool steps are trusted (sourced from 9P); inline code steps are validated
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// individually so the combined string is always returned as trusted.
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func BuildPipeline(steps []PipeStep) (string, bool, error) {
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if len(steps) == 0 {
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return "", false, fmt.Errorf("pipe requires at least one step")
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}
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validator := &Server{} // used only for ValidateCode; no shared rate-limit state
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parts := make([]string, 0, len(steps))
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for _, step := range steps {
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var code string
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if step.Tool != "" {
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var err error
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code, err = ReadTool(step.Tool)
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if err != nil {
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return "", false, fmt.Errorf("pipe step %q: %v", step.Tool, err)
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}
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} else if step.Code != "" {
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if err := validator.ValidateCode(step.Code); err != nil {
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return "", false, fmt.Errorf("pipe step code: %v", err)
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}
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code = step.Code
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} else {
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return "", false, fmt.Errorf("each pipe step requires either 'tool' or 'code'")
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}
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language := "bash"
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if step.Tool != "" {
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language = detectLanguage(code)
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}
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if len(step.Args) > 0 {
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code = injectArgs(language, step.Tool, step.Args, code)
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}
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switch language {
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case "python3":
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parts = append(parts, fmt.Sprintf("( python3 -c $'%s' )", ansiCEscape(code)))
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case "perl":
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parts = append(parts, fmt.Sprintf("( perl -e $'%s' )", ansiCEscape(code)))
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default:
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parts = append(parts, fmt.Sprintf("(\n%s\n)", code))
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}
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}
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return strings.Join(parts, " |\n"), true, nil
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}
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func dispatchExecutePipe(ctx context.Context, e *Server, args json.RawMessage) (string, error) {
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var a struct {
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Pipe []PipeStep `json:"pipe"`
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Timeout int `json:"timeout"`
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Sandbox string `json:"sandbox"`
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}
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if err := json.Unmarshal(args, &a); err != nil {
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return "", fmt.Errorf("execute_pipe: bad args: %w", err)
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}
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if len(a.Pipe) == 0 {
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return "", fmt.Errorf("execute_pipe: 'pipe' is required")
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}
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code, _, err := BuildPipeline(a.Pipe)
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if err != nil {
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return "", err
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}
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if e.Confirm != nil && !e.Confirm(fmt.Sprintf("execute_pipe: %s", code)) {
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return "", fmt.Errorf("execute_pipe: denied by user")
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}
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timeout := a.Timeout
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if timeout <= 0 {
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timeout = 30
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}
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sandbox := a.Sandbox
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if sandbox == "" {
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sandbox = "default"
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}
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return e.Execute(ctx, code, "bash", timeout, sandbox, true)
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}
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