ref: f5250ec09d4324e99288ad4cf2666e25eba602cd
dir: /deps/deps.go/
package deps
import (
"sync"
"time"
"github.com/pkg/errors"
"github.com/gohugoio/hugo/cache/filecache"
"github.com/gohugoio/hugo/common/loggers"
"github.com/gohugoio/hugo/config"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/hugofs"
"github.com/gohugoio/hugo/langs"
"github.com/gohugoio/hugo/media"
"github.com/gohugoio/hugo/resources/page"
"github.com/gohugoio/hugo/metrics"
"github.com/gohugoio/hugo/output"
"github.com/gohugoio/hugo/resources"
"github.com/gohugoio/hugo/source"
"github.com/gohugoio/hugo/tpl"
jww "github.com/spf13/jwalterweatherman"
)
// Deps holds dependencies used by many.
// There will be normally only one instance of deps in play
// at a given time, i.e. one per Site built.
type Deps struct {
// The logger to use.
Log *loggers.Logger `json:"-"`
// Used to log errors that may repeat itself many times.
DistinctErrorLog *helpers.DistinctLogger
// Used to log warnings that may repeat itself many times.
DistinctWarningLog *helpers.DistinctLogger
// The templates to use. This will usually implement the full tpl.TemplateHandler.
Tmpl tpl.TemplateFinder `json:"-"`
// We use this to parse and execute ad-hoc text templates.
TextTmpl tpl.TemplateParseFinder `json:"-"`
// The file systems to use.
Fs *hugofs.Fs `json:"-"`
// The PathSpec to use
*helpers.PathSpec `json:"-"`
// The ContentSpec to use
*helpers.ContentSpec `json:"-"`
// The SourceSpec to use
SourceSpec *source.SourceSpec `json:"-"`
// The Resource Spec to use
ResourceSpec *resources.Spec
// The configuration to use
Cfg config.Provider `json:"-"`
// The file cache to use.
FileCaches filecache.Caches
// The translation func to use
Translate func(translationID string, args ...interface{}) string `json:"-"`
// The language in use. TODO(bep) consolidate with site
Language *langs.Language
// The site building.
Site page.Site
// All the output formats available for the current site.
OutputFormatsConfig output.Formats
templateProvider ResourceProvider
WithTemplate func(templ tpl.TemplateHandler) error `json:"-"`
translationProvider ResourceProvider
Metrics metrics.Provider
// Timeout is configurable in site config.
Timeout time.Duration
// BuildStartListeners will be notified before a build starts.
BuildStartListeners *Listeners
*globalErrHandler
}
type globalErrHandler struct {
// Channel for some "hard to get to" build errors
buildErrors chan error
}
// SendErr sends the error on a channel to be handled later.
// This can be used in situations where returning and aborting the current
// operation isn't practical.
func (e *globalErrHandler) SendError(err error) {
if e.buildErrors != nil {
select {
case e.buildErrors <- err:
default:
}
return
}
jww.ERROR.Println(err)
}
func (e *globalErrHandler) StartErrorCollector() chan error {
e.buildErrors = make(chan error, 10)
return e.buildErrors
}
// Listeners represents an event listener.
type Listeners struct {
sync.Mutex
// A list of funcs to be notified about an event.
listeners []func()
}
// Add adds a function to a Listeners instance.
func (b *Listeners) Add(f func()) {
if b == nil {
return
}
b.Lock()
defer b.Unlock()
b.listeners = append(b.listeners, f)
}
// Notify executes all listener functions.
func (b *Listeners) Notify() {
b.Lock()
defer b.Unlock()
for _, notify := range b.listeners {
notify()
}
}
// ResourceProvider is used to create and refresh, and clone resources needed.
type ResourceProvider interface {
Update(deps *Deps) error
Clone(deps *Deps) error
}
// TemplateHandler returns the used tpl.TemplateFinder as tpl.TemplateHandler.
func (d *Deps) TemplateHandler() tpl.TemplateHandler {
return d.Tmpl.(tpl.TemplateHandler)
}
// LoadResources loads translations and templates.
func (d *Deps) LoadResources() error {
// Note that the translations need to be loaded before the templates.
if err := d.translationProvider.Update(d); err != nil {
return errors.Wrap(err, "loading translations")
}
if err := d.templateProvider.Update(d); err != nil {
return errors.Wrap(err, "loading templates")
}
return nil
}
// New initializes a Dep struct.
// Defaults are set for nil values,
// but TemplateProvider, TranslationProvider and Language are always required.
func New(cfg DepsCfg) (*Deps, error) {
var (
logger = cfg.Logger
fs = cfg.Fs
)
if cfg.TemplateProvider == nil {
panic("Must have a TemplateProvider")
}
if cfg.TranslationProvider == nil {
panic("Must have a TranslationProvider")
}
if cfg.Language == nil {
panic("Must have a Language")
}
if logger == nil {
logger = loggers.NewErrorLogger()
}
if fs == nil {
// Default to the production file system.
fs = hugofs.NewDefault(cfg.Language)
}
if cfg.MediaTypes == nil {
cfg.MediaTypes = media.DefaultTypes
}
if cfg.OutputFormats == nil {
cfg.OutputFormats = output.DefaultFormats
}
ps, err := helpers.NewPathSpec(fs, cfg.Language, logger)
if err != nil {
return nil, errors.Wrap(err, "create PathSpec")
}
fileCaches, err := filecache.NewCaches(ps)
if err != nil {
return nil, errors.WithMessage(err, "failed to create file caches from configuration")
}
resourceSpec, err := resources.NewSpec(ps, fileCaches, logger, cfg.OutputFormats, cfg.MediaTypes)
if err != nil {
return nil, err
}
contentSpec, err := helpers.NewContentSpec(cfg.Language, logger, ps.BaseFs.Content.Fs)
if err != nil {
return nil, err
}
sp := source.NewSourceSpec(ps, fs.Source)
timeoutms := cfg.Language.GetInt("timeout")
if timeoutms <= 0 {
timeoutms = 3000
}
distinctErrorLogger := helpers.NewDistinctLogger(logger.ERROR)
distinctWarnLogger := helpers.NewDistinctLogger(logger.WARN)
d := &Deps{
Fs: fs,
Log: logger,
DistinctErrorLog: distinctErrorLogger,
DistinctWarningLog: distinctWarnLogger,
templateProvider: cfg.TemplateProvider,
translationProvider: cfg.TranslationProvider,
WithTemplate: cfg.WithTemplate,
PathSpec: ps,
ContentSpec: contentSpec,
SourceSpec: sp,
ResourceSpec: resourceSpec,
Cfg: cfg.Language,
Language: cfg.Language,
Site: cfg.Site,
FileCaches: fileCaches,
BuildStartListeners: &Listeners{},
Timeout: time.Duration(timeoutms) * time.Millisecond,
globalErrHandler: &globalErrHandler{},
}
if cfg.Cfg.GetBool("templateMetrics") {
d.Metrics = metrics.NewProvider(cfg.Cfg.GetBool("templateMetricsHints"))
}
return d, nil
}
// ForLanguage creates a copy of the Deps with the language dependent
// parts switched out.
func (d Deps) ForLanguage(cfg DepsCfg, onCreated func(d *Deps) error) (*Deps, error) {
l := cfg.Language
var err error
d.PathSpec, err = helpers.NewPathSpecWithBaseBaseFsProvided(d.Fs, l, d.Log, d.BaseFs)
if err != nil {
return nil, err
}
d.ContentSpec, err = helpers.NewContentSpec(l, d.Log, d.BaseFs.Content.Fs)
if err != nil {
return nil, err
}
d.Site = cfg.Site
// The resource cache is global so reuse.
// TODO(bep) clean up these inits.
resourceCache := d.ResourceSpec.ResourceCache
d.ResourceSpec, err = resources.NewSpec(d.PathSpec, d.ResourceSpec.FileCaches, d.Log, cfg.OutputFormats, cfg.MediaTypes)
if err != nil {
return nil, err
}
d.ResourceSpec.ResourceCache = resourceCache
d.Cfg = l
d.Language = l
if onCreated != nil {
if err = onCreated(&d); err != nil {
return nil, err
}
}
if err := d.translationProvider.Clone(&d); err != nil {
return nil, err
}
if err := d.templateProvider.Clone(&d); err != nil {
return nil, err
}
d.BuildStartListeners = &Listeners{}
return &d, nil
}
// DepsCfg contains configuration options that can be used to configure Hugo
// on a global level, i.e. logging etc.
// Nil values will be given default values.
type DepsCfg struct {
// The Logger to use.
Logger *loggers.Logger
// The file systems to use
Fs *hugofs.Fs
// The language to use.
Language *langs.Language
// The Site in use
Site page.Site
// The configuration to use.
Cfg config.Provider
// The media types configured.
MediaTypes media.Types
// The output formats configured.
OutputFormats output.Formats
// Template handling.
TemplateProvider ResourceProvider
WithTemplate func(templ tpl.TemplateHandler) error
// i18n handling.
TranslationProvider ResourceProvider
// Whether we are in running (server) mode
Running bool
}