Enum TransitionError 

pub enum TransitionError {
    NoSuchIssue(String),
    Refused(String),
    Write {
        path: PathBuf,
        reason: String,
    },
}

Why a transition did not happen.

Each variant carries what the caller needs to act, never only that it failed: which status the issue is actually in, which dependency holds it, which evidence token is missing. The messages are the shell’s messages.

use majordomus_cli::plan::TransitionError;

// A refusal says what is in the way, because that is the thing the caller can change.
let refused = TransitionError::Refused("I0001 is DONE, not READY".into());
assert_eq!(refused.to_string(), "I0001 is DONE, not READY");

// A missing issue is a different answer from an illegal move, and callers map them to
// different statuses: not_found rather than refused.
let missing = TransitionError::NoSuchIssue("I9999".into());
assert_eq!(missing.to_string(), "no issue 'I9999'");
assert_ne!(missing, refused);

Variants

NoSuchIssue(String)

No issue of that id.

Refused(String)

The move is illegal from the status the issue is in.

Write

The record could not be rewritten.

Fields

path: PathBuf

The record.

reason: String

What the filesystem said.

Trait Implementations

impl Clone for TransitionError

fn clone(&self) -> TransitionError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TransitionError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for TransitionError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for TransitionError

impl Error for TransitionError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for TransitionError

fn eq(&self, other: &TransitionError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for TransitionError