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id_prefix: add empty disambiguation index for convenience

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Callers might want to fall back to an empty index if context.populate() failed.
This commit is contained in:
Yuya Nishihara 2024-09-30 12:28:26 +09:00
parent bf6620d8d9
commit 3d41237efe
2 changed files with 14 additions and 10 deletions
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5
lib/src/id_prefix.rs
View file

@ -145,6 +145,11 @@ pub struct IdPrefixIndex<'a> {
}
impl IdPrefixIndex<'_> {
/// Returns an empty index that just falls back to a provided `repo`.
pub const fn empty() -> IdPrefixIndex<'static> {
IdPrefixIndex { indexes: None }
}
/// Resolve an unambiguous commit ID prefix.
pub fn resolve_commit_prefix(
&self,

19
lib/src/revset.rs
View file

@ -41,6 +41,7 @@ use crate::fileset::FilesetExpression;
use crate::graph::GraphEdge;
use crate::hex_util::to_forward_hex;
use crate::id_prefix::IdPrefixContext;
use crate::id_prefix::IdPrefixIndex;
use crate::object_id::HexPrefix;
use crate::object_id::PrefixResolution;
use crate::op_store::RemoteRefState;
@ -1624,11 +1625,10 @@ impl PartialSymbolResolver for CommitPrefixResolver<'_> {
symbol: &str,
) -> Result<Option<Vec<CommitId>>, RevsetResolutionError> {
if let Some(prefix) = HexPrefix::new(symbol) {
let resolution = match self.context.map(|ctx| ctx.populate(repo)) {
Some(index) => index.resolve_commit_prefix(repo, &prefix),
None => repo.index().resolve_commit_id_prefix(&prefix),
};
match resolution {
let index = self
.context
.map_or(IdPrefixIndex::empty(), |ctx| ctx.populate(repo));
match index.resolve_commit_prefix(repo, &prefix) {
PrefixResolution::AmbiguousMatch => Err(
RevsetResolutionError::AmbiguousCommitIdPrefix(symbol.to_owned()),
),
@ -1653,11 +1653,10 @@ impl PartialSymbolResolver for ChangePrefixResolver<'_> {
symbol: &str,
) -> Result<Option<Vec<CommitId>>, RevsetResolutionError> {
if let Some(prefix) = to_forward_hex(symbol).as_deref().and_then(HexPrefix::new) {
let resolution = match self.context.map(|ctx| ctx.populate(repo)) {
Some(index) => index.resolve_change_prefix(repo, &prefix),
None => repo.resolve_change_id_prefix(&prefix),
};
match resolution {
let index = self
.context
.map_or(IdPrefixIndex::empty(), |ctx| ctx.populate(repo));
match index.resolve_change_prefix(repo, &prefix) {
PrefixResolution::AmbiguousMatch => Err(
RevsetResolutionError::AmbiguousChangeIdPrefix(symbol.to_owned()),
),