hugo/tpl/fmt/fmt.go

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// Copyright 2017 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 fmt provides template functions for formatting strings.
package fmt
import (
_fmt "fmt"
"sort"
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"github.com/bep/logg"
"github.com/gohugoio/hugo/common/loggers"
"github.com/gohugoio/hugo/deps"
"github.com/spf13/cast"
)
// New returns a new instance of the fmt-namespaced template functions.
func New(d *deps.Deps) *Namespace {
ns := &Namespace{
logger: d.Log,
}
d.BuildStartListeners.Add(func() {
ns.logger.Reset()
})
return ns
}
// Namespace provides template functions for the "fmt" namespace.
type Namespace struct {
logger loggers.Logger
}
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// Print returns a string representation of args.
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func (ns *Namespace) Print(args ...any) string {
return _fmt.Sprint(args...)
}
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// Printf returns string representation of args formatted with the layout in format.
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func (ns *Namespace) Printf(format string, args ...any) string {
return _fmt.Sprintf(format, args...)
}
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// Println returns string representation of args ending with a newline.
func (ns *Namespace) Println(args ...any) string {
return _fmt.Sprintln(args...)
}
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// Errorf formats args according to a format specifier and logs an ERROR.
// It returns an empty string.
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func (ns *Namespace) Errorf(format string, args ...any) string {
ns.logger.Errorf(format, args...)
return ""
}
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// Erroridf formats args according to a format specifier and logs an ERROR and
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// an information text that the error with the given id can be suppressed in config.
// It returns an empty string.
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func (ns *Namespace) Erroridf(id, format string, args ...any) string {
ns.logger.Erroridf(id, format, args...)
return ""
}
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// Warnf formats args according to a format specifier and logs a WARNING.
// It returns an empty string.
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func (ns *Namespace) Warnf(format string, args ...any) string {
ns.logger.Warnf(format, args...)
return ""
}
// Warnidf formats args according to a format specifier and logs an WARNING and
// an information text that the warning with the given id can be suppressed in config.
// It returns an empty string.
func (ns *Namespace) Warnidf(id, format string, args ...any) string {
ns.logger.Warnidf(id, format, args...)
return ""
}
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// Warnmf is experimental and subject to change at any time.
func (ns *Namespace) Warnmf(m any, format string, args ...any) string {
return ns.logmf(ns.logger.Warn(), m, format, args...)
}
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// Errormf is experimental and subject to change at any time.
func (ns *Namespace) Errormf(m any, format string, args ...any) string {
return ns.logmf(ns.logger.Error(), m, format, args...)
}
func (ns *Namespace) logmf(l logg.LevelLogger, m any, format string, args ...any) string {
mm := cast.ToStringMap(m)
fields := make(logg.Fields, len(mm))
i := 0
for k, v := range mm {
fields[i] = logg.Field{Name: k, Value: v}
i++
}
// Sort the fields to make the output deterministic.
sort.Slice(fields, func(i, j int) bool {
return fields[i].Name < fields[j].Name
})
l.WithFields(fields).Logf(format, args...)
return ""
}