65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
package i3
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import (
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"encoding/json"
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"fmt"
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)
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// CommandResult always contains Success, and command-specific fields where
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// appropriate.
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type CommandResult struct {
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// Success indicates whether the command was run without any errors.
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Success bool `json:"success"`
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// Error is a human-readable error message, non-empty for unsuccessful
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// commands.
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Error string `json:"error"`
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}
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// IsUnsuccessful is a convenience function which can be used to check if an
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// error is a CommandUnsuccessfulError.
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func IsUnsuccessful(err error) bool {
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_, ok := err.(*CommandUnsuccessfulError)
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return ok
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}
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// CommandUnsuccessfulError is returned by RunCommand for unsuccessful
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// commands. This type is exported so that you can ignore this error if you
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// expect your command(s) to fail.
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type CommandUnsuccessfulError struct {
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command string
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cr CommandResult
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}
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// Error implements error.
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func (e *CommandUnsuccessfulError) Error() string {
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return fmt.Sprintf("command %q unsuccessful: %v", e.command, e.cr.Error)
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}
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// RunCommand makes i3 run the specified command.
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//
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// Error is non-nil if any CommandResult.Success is not true. See IsUnsuccessful
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// if you send commands which are expected to fail.
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//
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// RunCommand is supported in i3 ≥ v4.0 (2011-07-31).
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func RunCommand(command string) ([]CommandResult, error) {
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reply, err := roundTrip(messageTypeRunCommand, []byte(command))
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if err != nil {
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return []CommandResult{}, err
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}
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var crs []CommandResult
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err = json.Unmarshal(reply.Payload, &crs)
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if err == nil {
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for _, cr := range crs {
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if !cr.Success {
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return crs, &CommandUnsuccessfulError{
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command: command,
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cr: cr,
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}
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}
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}
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}
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return crs, err
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}
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