All files / src/patches/nunjucks load-event.js

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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;
}