chore: introduce flags helper for consistency #533
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // Package flags provides utility functions for working with cobra command flags. | ||
| // It simplifies the process of marking flags as required and handling related errors. | ||
| package flags | ||
|
|
||
| import ( | ||
| "errors" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
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| var ( | ||
| // ErrFlagRequired is returned when a flag cannot be marked as required. | ||
| ErrFlagRequired = errors.New("error setting flag as required") | ||
|
|
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| // ErrInvalidInput is returned when invalid input is provided. | ||
| ErrInvalidInput = errors.New("invalid input") | ||
| ) | ||
|
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| // buildFlagRequiredError creates a consistent error message for flag requirement failures. | ||
| // It wraps the original error with context about which flag and location failed. | ||
| func buildFlagRequiredError(flag, location string, err error) error { | ||
| if err == nil { | ||
| return nil | ||
| } | ||
|
|
||
| return fmt.Errorf("%w - (flag: %s, file: %s): %v", ErrFlagRequired, flag, location, err) | ||
| } | ||
|
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| // SetFlagRequired marks a single flag as required for a cobra command. | ||
| // | ||
| // Parameters: | ||
| // - cmd: The cobra command to modify | ||
| // - flag: The name of the flag to mark as required | ||
| // - location: A string identifying the calling location (for error context) | ||
| // - isPersistent: If true, marks the persistent flag as required; otherwise marks the regular flag | ||
| // | ||
| // Returns an error if: | ||
| // - cmd is nil | ||
| // - flag is empty | ||
| // - the flag cannot be marked as required (e.g., flag doesn't exist) | ||
| func SetFlagRequired(cmd *cobra.Command, flag string, location string, isPersistent bool) error { | ||
| if cmd == nil { | ||
| return fmt.Errorf("%w: command cannot be nil", ErrInvalidInput) | ||
| } | ||
|
|
||
| if strings.TrimSpace(flag) == "" { | ||
| return fmt.Errorf("%w: flag name cannot be empty", ErrInvalidInput) | ||
| } | ||
|
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| if isPersistent { | ||
| if err := cmd.MarkPersistentFlagRequired(flag); err != nil { | ||
| return buildFlagRequiredError(flag, location, err) | ||
| } | ||
| } else { | ||
| if err := cmd.MarkFlagRequired(flag); err != nil { | ||
| return buildFlagRequiredError(flag, location, err) | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
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| // SetFlagsRequired marks multiple flags as required for a cobra command. | ||
| // | ||
| // Parameters: | ||
| // - cmd: The cobra command to modify | ||
| // - flags: A slice of flag names to mark as required | ||
| // - location: A string identifying the calling location (for error context) | ||
| // - isPersistent: If true, marks the persistent flags as required; otherwise marks the regular flags | ||
| // | ||
| // Returns a joined error containing all individual flag requirement failures. | ||
| // If no flags are provided or all succeed, returns nil. | ||
| // | ||
| // Note: This function continues processing all flags even if some fail, | ||
| // allowing you to see all failures at once rather than stopping at the first error. | ||
| func SetFlagsRequired(cmd *cobra.Command, flags []string, location string, isPersistent bool) error { | ||
| if cmd == nil { | ||
| return fmt.Errorf("%w: command cannot be nil", ErrInvalidInput) | ||
| } | ||
|
|
||
| if len(flags) == 0 { | ||
| return nil | ||
| } | ||
|
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| // Pre-allocate slice with exact capacity needed | ||
| flagErrors := make([]error, 0, len(flags)) | ||
|
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| for _, flag := range flags { | ||
| if err := SetFlagRequired(cmd, flag, location, isPersistent); err != nil { | ||
| flagErrors = append(flagErrors, err) | ||
| } | ||
| } | ||
|
|
||
| if len(flagErrors) > 0 { | ||
| return errors.Join(flagErrors...) | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
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