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package main
import (
"context"
"errors"
"fmt"
"io"
"os/exec"
"path/filepath"
"strings"
)
type taskBinaryFinder func() (string, error)
type repoTopLevelDetector func(context.Context) (string, error)
type taskCommandRunner func(context.Context, string, []string, io.Reader, io.Writer, io.Writer) error
type taskRunner struct {
findTaskBinary taskBinaryFinder
detectRepoRoot repoTopLevelDetector
runCommand taskCommandRunner
}
func newTaskRunner() taskRunner {
return taskRunner{
findTaskBinary: findTaskBinary,
detectRepoRoot: detectRepoRoot,
runCommand: runTaskCommand,
}
}
func runTaskSubcommandIfRequested(args []string, stdin io.Reader, stdout, stderr io.Writer) (bool, int, error) {
if len(args) == 0 || args[0] != "task" {
return false, 0, nil
}
code, err := newTaskRunner().run(context.Background(), args[1:], stdin, stdout, stderr)
return true, code, err
}
func (r taskRunner) run(ctx context.Context, args []string, stdin io.Reader, stdout, stderr io.Writer) (int, error) {
runner := normalizeTaskRunner(r)
taskPath, err := runner.findTaskBinary()
if err != nil {
return 1, fmt.Errorf("hexai task: Taskwarrior binary lookup failed: %w", err)
}
repoRoot, err := runner.detectRepoRoot(ctx)
if err != nil {
return 1, fmt.Errorf("hexai task: must be run inside a git repository so project:<repo> can be derived: %w", err)
}
projectName := filepath.Base(strings.TrimSpace(repoRoot))
if projectName == "" || projectName == "." || projectName == string(filepath.Separator) {
return 1, fmt.Errorf("hexai task: could not derive project name from git root %q", repoRoot)
}
taskArgs := append([]string{"project:" + projectName, "+agent"}, args...)
if err := runner.runCommand(ctx, taskPath, taskArgs, stdin, stdout, stderr); err != nil {
var exitErr *exec.ExitError
if errors.As(err, &exitErr) {
return exitErr.ExitCode(), nil
}
return 1, fmt.Errorf("hexai task: failed to run Taskwarrior: %w", err)
}
return 0, nil
}
func normalizeTaskRunner(r taskRunner) taskRunner {
if r.findTaskBinary == nil {
r.findTaskBinary = findTaskBinary
}
if r.detectRepoRoot == nil {
r.detectRepoRoot = detectRepoRoot
}
if r.runCommand == nil {
r.runCommand = runTaskCommand
}
return r
}
func findTaskBinary() (string, error) {
path, err := exec.LookPath("task")
if err != nil {
return "", fmt.Errorf("Taskwarrior binary 'task' not found in PATH; install Taskwarrior and retry")
}
return path, nil
}
func detectRepoRoot(ctx context.Context) (string, error) {
out, err := exec.CommandContext(ctx, "git", "rev-parse", "--show-toplevel").Output()
if err != nil {
return "", fmt.Errorf("must be run inside a git repository so project:<repo> can be derived")
}
root := strings.TrimSpace(string(out))
if root == "" {
return "", fmt.Errorf("git returned an empty repository root")
}
return root, nil
}
func runTaskCommand(ctx context.Context, name string, args []string, stdin io.Reader, stdout, stderr io.Writer) error {
cmd := exec.CommandContext(ctx, name, args...)
cmd.Stdin = stdin
cmd.Stdout = stdout
cmd.Stderr = stderr
return cmd.Run()
}
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