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package executor
import (
"context"
"fmt"
"log/slog"
"os"
"os/exec"
"path/filepath"
"strings"
"sync"
"syscall"
"github.com/thepeterstone/claudomator/internal/storage"
"github.com/thepeterstone/claudomator/internal/task"
)
// GeminiRunner spawns the `gemini` CLI in non-interactive mode.
type GeminiRunner struct {
BinaryPath string // defaults to "gemini"
Logger *slog.Logger
LogDir string // base directory for execution logs
APIURL string // base URL of the Claudomator API, passed to subprocesses
}
// ExecLogDir returns the log directory for the given execution ID.
func (r *GeminiRunner) ExecLogDir(execID string) string {
if r.LogDir == "" {
return ""
}
return filepath.Join(r.LogDir, execID)
}
func (r *GeminiRunner) binaryPath() string {
if r.BinaryPath != "" {
return r.BinaryPath
}
return "gemini"
}
// Run executes a gemini <instructions> invocation, streaming output to log files.
func (r *GeminiRunner) Run(ctx context.Context, t *task.Task, e *storage.Execution) error {
if t.Agent.ProjectDir != "" {
if _, err := os.Stat(t.Agent.ProjectDir); err != nil {
return fmt.Errorf("project_dir %q: %w", t.Agent.ProjectDir, err)
}
}
logDir := r.ExecLogDir(e.ID)
if logDir == "" {
logDir = e.ID
}
if err := os.MkdirAll(logDir, 0700); err != nil {
return fmt.Errorf("creating log dir: %w", err)
}
if e.StdoutPath == "" {
e.StdoutPath = filepath.Join(logDir, "stdout.log")
e.StderrPath = filepath.Join(logDir, "stderr.log")
e.ArtifactDir = logDir
}
if e.SessionID == "" {
e.SessionID = e.ID
}
questionFile := filepath.Join(logDir, "question.json")
args := r.buildArgs(t, e, questionFile)
// Gemini CLI doesn't necessarily have the same rate limiting behavior as Claude,
// but we'll use a similar execution pattern.
err := r.execOnce(ctx, args, t.Agent.ProjectDir, e)
if err != nil {
return err
}
// Check whether the agent left a question before exiting.
data, readErr := os.ReadFile(questionFile)
if readErr == nil {
os.Remove(questionFile) // consumed
return &BlockedError{QuestionJSON: strings.TrimSpace(string(data)), SessionID: e.SessionID}
}
return nil
}
func (r *GeminiRunner) execOnce(ctx context.Context, args []string, workingDir string, e *storage.Execution) error {
cmd := exec.CommandContext(ctx, r.binaryPath(), args...)
cmd.Env = append(os.Environ(),
"CLAUDOMATOR_API_URL="+r.APIURL,
"CLAUDOMATOR_TASK_ID="+e.TaskID,
"CLAUDOMATOR_QUESTION_FILE="+filepath.Join(e.ArtifactDir, "question.json"),
)
cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
if workingDir != "" {
cmd.Dir = workingDir
}
stdoutFile, err := os.Create(e.StdoutPath)
if err != nil {
return fmt.Errorf("creating stdout log: %w", err)
}
defer stdoutFile.Close()
stderrFile, err := os.Create(e.StderrPath)
if err != nil {
return fmt.Errorf("creating stderr log: %w", err)
}
defer stderrFile.Close()
stdoutR, stdoutW, err := os.Pipe()
if err != nil {
return fmt.Errorf("creating stdout pipe: %w", err)
}
cmd.Stdout = stdoutW
cmd.Stderr = stderrFile
if err := cmd.Start(); err != nil {
stdoutW.Close()
stdoutR.Close()
return fmt.Errorf("starting gemini: %w", err)
}
stdoutW.Close()
killDone := make(chan struct{})
go func() {
select {
case <-ctx.Done():
syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)
case <-killDone:
}
}()
var costUSD float64
var streamErr error
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
// Reusing parseStream as the JSONL format should be compatible
costUSD, streamErr = parseStream(stdoutR, stdoutFile, r.Logger)
stdoutR.Close()
}()
waitErr := cmd.Wait()
close(killDone)
wg.Wait()
e.CostUSD = costUSD
if waitErr != nil {
if exitErr, ok := waitErr.(*exec.ExitError); ok {
e.ExitCode = exitErr.ExitCode()
}
if tail := tailFile(e.StderrPath, 20); tail != "" {
return fmt.Errorf("gemini exited with error: %w\nstderr:\n%s", waitErr, tail)
}
return fmt.Errorf("gemini exited with error: %w", waitErr)
}
e.ExitCode = 0
if streamErr != nil {
return streamErr
}
return nil
}
func (r *GeminiRunner) buildArgs(t *task.Task, e *storage.Execution, questionFile string) []string {
// Gemini CLI uses a different command structure: gemini "instructions" [flags]
instructions := t.Agent.Instructions
if !t.Agent.SkipPlanning {
instructions = withPlanningPreamble(instructions)
}
args := []string{
"-p", instructions,
"--output-format", "stream-json",
"--yolo", // auto-approve all tools (equivalent to Claude's bypassPermissions)
}
// Note: Gemini CLI flags might differ from Claude CLI.
// Assuming common flags for now, but these may need adjustment.
if t.Agent.Model != "" {
args = append(args, "--model", t.Agent.Model)
}
// Gemini CLI doesn't use --session-id for the first run in the same way,
// or it might use it differently. For now we assume compatibility.
if e.SessionID != "" {
// If it's a resume, it might use different flags.
if e.ResumeSessionID != "" {
// This is a placeholder for Gemini's resume logic
}
}
return args
}
|
