mirror of https://github.com/gohugoio/hugo
79 lines
2.4 KiB
Go
79 lines
2.4 KiB
Go
// Copyright 2024 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package provides ways to identify values in Hugo. Used for dependency tracking etc.
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package identity
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import (
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"fmt"
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"sync/atomic"
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hglob "github.com/gohugoio/hugo/hugofs/glob"
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)
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// NewGlobIdentity creates a new Identity that
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// is probably dependent on any other Identity
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// that matches the given pattern.
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func NewGlobIdentity(pattern string) Identity {
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glob, err := hglob.GetGlob(pattern)
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if err != nil {
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panic(err)
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}
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predicate := func(other Identity) bool {
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return glob.Match(other.IdentifierBase())
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}
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return NewPredicateIdentity(predicate, nil)
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}
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var predicateIdentityCounter = &atomic.Uint32{}
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type predicateIdentity struct {
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id string
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probablyDependent func(Identity) bool
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probablyDependency func(Identity) bool
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}
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var (
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_ IsProbablyDependencyProvider = &predicateIdentity{}
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_ IsProbablyDependentProvider = &predicateIdentity{}
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)
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// NewPredicateIdentity creates a new Identity that implements both IsProbablyDependencyProvider and IsProbablyDependentProvider
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// using the provided functions, both of which are optional.
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func NewPredicateIdentity(
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probablyDependent func(Identity) bool,
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probablyDependency func(Identity) bool,
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) *predicateIdentity {
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if probablyDependent == nil {
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probablyDependent = func(Identity) bool { return false }
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}
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if probablyDependency == nil {
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probablyDependency = func(Identity) bool { return false }
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}
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return &predicateIdentity{probablyDependent: probablyDependent, probablyDependency: probablyDependency, id: fmt.Sprintf("predicate%d", predicateIdentityCounter.Add(1))}
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}
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func (id *predicateIdentity) IdentifierBase() string {
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return id.id
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}
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func (id *predicateIdentity) IsProbablyDependent(other Identity) bool {
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return id.probablyDependent(other)
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}
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func (id *predicateIdentity) IsProbablyDependency(other Identity) bool {
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return id.probablyDependency(other)
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}
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