Enum CommitWalkError 

#[non_exhaustive]
pub enum CommitWalkError {
    Command(CommandError),
    RefNotFound {
        ref_name: String,
    },
    Backend {
        message: String,
    },
}

Why a CommitWalker::commits_since call could not produce a history.

Deliberately narrower than any backend’s own error type: it keeps only the distinctions a consumer can act on – the underlying command failed, the requested bound does not exist, or the backend failed for some other reason it can only describe in prose. Backends map their richer errors into these variants at the boundary.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Command(CommandError)

The walk was served by shelling out, and the subprocess itself failed (e.g. no git binary on PATH).

RefNotFound

An explicitly requested since_ref does not resolve to a commit.

This is always an error rather than a silent fall-through to an unbounded walk: ignoring the caller’s bound would re-surface already-released commits into severity and changelog inference.

Fields

ref_name: String

Backend

The backend failed for a reason with no Layer 1 equivalent – a repository that could not be opened, a corrupt object database, an unparsable log stream. message carries the backend’s own rendering.

Fields

message: String

Trait Implementations

impl Clone for CommitWalkError

fn clone(&self) -> CommitWalkError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CommitWalkError

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

Formats the value using the given formatter.

impl Diagnostic for CommitWalkError

fn code(&self) -> Option<Box<dyn Display + '_>>

Unique diagnostic code that can be used to look up more information about this Diagnostic. Ideally also globally unique, and documented in the toplevel crate’s documentation for easy searching. Rust path format (foo::bar::baz) is recommended, but more classic codes like E0123 or enums will work just fine.

fn help(&self) -> Option<Box<dyn Display + '_>>

Additional help text related to this Diagnostic. Do you have any advice for the poor soul who’s just run into this issue?

fn severity(&self) -> Option<Severity>

Diagnostic severity. This may be used by ReportHandlers to change the display format of this diagnostic.

fn url<'a>(&'a self) -> Option<Box<dyn Display + 'a>>

URL to visit for a more detailed explanation/help about this Diagnostic.

fn source_code(&self) -> Option<&dyn SourceCode>

Source code to apply this Diagnostic’s Diagnostic::labels to.

fn labels(&self) -> Option<Box<dyn Iterator<Item = LabeledSpan> + '_>>

Labels to apply to this Diagnostic’s Diagnostic::source_code

fn related<'a>( &'a self, ) -> Option<Box<dyn Iterator<Item = &'a dyn Diagnostic> + 'a>>

Additional related Diagnostics.

fn diagnostic_source(&self) -> Option<&dyn Diagnostic>

The cause of the error.

impl Display for CommitWalkError

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

Formats the value using the given formatter.

impl Eq for CommitWalkError

impl Error for CommitWalkError

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 From<CommandError> for CommitWalkError

fn from(source: CommandError) -> Self

Converts to this type from the input type.

impl PartialEq for CommitWalkError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for CommitWalkError