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Patch for nunjucks to emit the 'load' event, even if the template is accessed from its internal cache.
https://mozilla.github.io/nunjucks/api.html#load-event
This allows page dependencies to be properly collected for live preview in {@link VariableRenderer}.
Patch is written against nunjucks v3.2.2
Changes are delimited with a // CHANGE HERE comment
*/
const { Environment, Template, lib } = require('nunjucks');
/* eslint-disable */
var noopTmplSrc = {
type: 'code',
obj: {
root: function root(env, context, frame, runtime, cb) {
try {
cb(null, '');
} catch (e) {
cb(handleError(e, null, null));
}
}
}
};
Environment.prototype.getTemplate = function getTemplate(name, eagerCompile, parentName, ignoreMissing, cb) {
var _this3 = this;
var that = this;
var tmpl = null;
Iif (name && name.raw) {
// this fixes autoescape for templates referenced in symbols
name = name.raw;
}
Iif (lib.isFunction(parentName)) {
cb = parentName;
parentName = null;
eagerCompile = eagerCompile || false;
}
Eif (lib.isFunction(eagerCompile)) {
cb = eagerCompile;
eagerCompile = false;
}
Iif (name instanceof Template) {
tmpl = name;
} else Iif (typeof name !== 'string') {
throw new Error('template names must be a string: ' + name);
} else {
for (var i = 0; i < this.loaders.length; i++) {
var loader = this.loaders[i];
tmpl = loader.cache[this.resolveTemplate(loader, parentName, name)];
if (tmpl) {
// CHANGE HERE
// pathsToNames in nunjucks.loaders.FileSystemLoader maintains a reverse mapping of fullPath: name
Object.entries(loader.pathsToNames).forEach(([fullPath, templateName]) => {
if (name === templateName) {
// Emit the load event
this.emit('load', name, {
src: tmpl,
path: fullPath, // we only need this
noCache: loader.noCache
}, loader)
}
});
break;
}
}
}
if (tmpl) {
Iif (eagerCompile) {
tmpl.compile();
}
if (cb) {
cb(null, tmpl);
return undefined;
} else E{
return tmpl;
}
}
var syncResult;
var createTemplate = function createTemplate(err, info) {
Iif (!info && !err && !ignoreMissing) {
err = new Error('template not found: ' + name);
}
Iif (err) {
if (cb) {
cb(err);
return;
} else {
throw err;
}
}
var newTmpl;
Iif (!info) {
newTmpl = new Template(noopTmplSrc, _this3, '', eagerCompile);
} else {
newTmpl = new Template(info.src, _this3, info.path, eagerCompile);
Eif (!info.noCache) {
info.loader.cache[name] = newTmpl;
}
}
if (cb) {
cb(null, newTmpl);
} else E{
syncResult = newTmpl;
}
};
lib.asyncIter(this.loaders, function (loader, i, next, done) {
function handle(err, src) {
Iif (err) {
done(err);
} else if (src) {
src.loader = loader;
done(null, src);
} else E{
next();
}
} // Resolve name relative to parentName
name = that.resolveTemplate(loader, parentName, name);
Iif (loader.async) {
loader.getSource(name, handle);
} else {
handle(null, loader.getSource(name));
}
}, createTemplate);
return syncResult;
} |