mirror of
https://github.com/gohugoio/hugo.git
synced 2024-12-04 08:47:43 -05:00
d5eda13cb2
Note that we only use this for change detection. The previous implementation invoked `MD5FromReaderFast` that created a MD5 has from 8 64 bytes chunks in the file, which is obviously very fast. The new implementation creates the hash from the entire file and ... seems to be even more effective: ``` name old time/op new time/op delta HashImage-10 9.45µs ±21% 10.89µs ± 1% ~ (p=0.343 n=4+4) name old alloc/op new alloc/op delta HashImage-10 144B ± 0% 8B ± 0% -94.44% (p=0.029 n=4+4) name old allocs/op new allocs/op delta HashImage-10 4.00 ± 0% 1.00 ± 0% -75.00% (p=0.029 n=4+4) ```
85 lines
2.1 KiB
Go
85 lines
2.1 KiB
Go
// Copyright 2024 The Hugo Authors. All rights reserved.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// Package hash provides non-cryptographic hash functions for template use.
|
|
package hash
|
|
|
|
import (
|
|
"context"
|
|
"hash/fnv"
|
|
|
|
"github.com/gohugoio/hugo/common/hashing"
|
|
"github.com/gohugoio/hugo/deps"
|
|
"github.com/gohugoio/hugo/tpl/internal"
|
|
"github.com/spf13/cast"
|
|
)
|
|
|
|
// New returns a new instance of the hash-namespaced template functions.
|
|
func New() *Namespace {
|
|
return &Namespace{}
|
|
}
|
|
|
|
// Namespace provides template functions for the "hash" namespace.
|
|
type Namespace struct{}
|
|
|
|
// FNV32a hashes v using fnv32a algorithm.
|
|
func (ns *Namespace) FNV32a(v any) (int, error) {
|
|
conv, err := cast.ToStringE(v)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
algorithm := fnv.New32a()
|
|
algorithm.Write([]byte(conv))
|
|
return int(algorithm.Sum32()), nil
|
|
}
|
|
|
|
// XxHash returns the xxHash of the input string.
|
|
func (ns *Namespace) XxHash(v any) (string, error) {
|
|
conv, err := cast.ToStringE(v)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return hashing.XxHashFromStringHexEncoded(conv), nil
|
|
}
|
|
|
|
const name = "hash"
|
|
|
|
func init() {
|
|
f := func(d *deps.Deps) *internal.TemplateFuncsNamespace {
|
|
ctx := New()
|
|
|
|
ns := &internal.TemplateFuncsNamespace{
|
|
Name: name,
|
|
Context: func(cctx context.Context, args ...any) (any, error) { return ctx, nil },
|
|
}
|
|
|
|
ns.AddMethodMapping(ctx.XxHash,
|
|
[]string{"xxhash"},
|
|
[][2]string{
|
|
{`{{ hash.XxHash "The quick brown fox jumps over the lazy dog" }}`, `0b242d361fda71bc`},
|
|
},
|
|
)
|
|
|
|
ns.AddMethodMapping(ctx.FNV32a,
|
|
nil,
|
|
[][2]string{
|
|
{`{{ hash.FNV32a "Hugo Rocks!!" }}`, `1515779328`},
|
|
},
|
|
)
|
|
|
|
return ns
|
|
}
|
|
|
|
internal.AddTemplateFuncsNamespace(f)
|
|
}
|