fj/cmd/errors.go
sid 43e43e7024 feat: v0.3.0a — add api command, pr diff/comment/review, structured errors
New commands:
- fgj api: raw REST API passthrough with field inference and path interpolation
- fgj pr diff: view PR diffs with color, --name-only, --stat
- fgj pr comment: add comments to pull requests
- fgj pr review: approve, request changes, or comment on PRs

Agentic enhancements:
- --json-errors flag for structured JSON error output on stderr
- APIError type wrapping HTTP status codes for machine consumption
- Error codes: auth_required, not_found, api_error, invalid_input, etc.

Docs updated for forgejo.zerova.net/sid/fgj-sid fork.
2026-03-21 21:50:24 -06:00

76 lines
1.9 KiB
Go

package cmd
import (
"encoding/json"
"errors"
"os"
"forgejo.zerova.net/sid/fgj-sid/internal/api"
)
// Error codes for structured error output.
const (
ErrAuthRequired = "auth_required"
ErrNotFound = "not_found"
ErrAPIError = "api_error"
ErrInvalidInput = "invalid_input"
ErrGitDetectionFailed = "git_detection_failed"
ErrNetworkError = "network_error"
)
// CLIError is a structured error type for machine-readable output.
type CLIError struct {
Code string `json:"code"`
Message string `json:"message"`
Detail string `json:"detail,omitempty"`
Status int `json:"status,omitempty"`
}
func (e *CLIError) Error() string {
return e.Message
}
// NewCLIError creates a new CLIError with the given code and message.
func NewCLIError(code, message string) *CLIError {
return &CLIError{Code: code, Message: message}
}
// NewAPIError creates a CLIError from an HTTP status and message.
func NewAPIError(status int, message string) *CLIError {
return &CLIError{Code: ErrAPIError, Message: message, Status: status}
}
// writeJSONError writes a structured JSON error to stderr.
// It attempts to extract structured info from known error types.
// WriteJSONError writes a structured JSON error to stderr.
// It is exported for use from main.go.
func WriteJSONError(err error) {
cliErr := &CLIError{
Code: ErrAPIError,
Message: err.Error(),
}
// Try to extract structured info from the error chain.
var apiErr *api.APIError
var cErr *CLIError
switch {
case errors.As(err, &cErr):
cliErr = cErr
case errors.As(err, &apiErr):
cliErr.Status = apiErr.StatusCode
cliErr.Detail = apiErr.Body
switch {
case apiErr.StatusCode == 401 || apiErr.StatusCode == 403:
cliErr.Code = ErrAuthRequired
case apiErr.StatusCode == 404:
cliErr.Code = ErrNotFound
default:
cliErr.Code = ErrAPIError
}
}
enc := json.NewEncoder(os.Stderr)
enc.SetIndent("", " ")
_ = enc.Encode(cliErr)
}