Add import command

Unlike load, allows manual control of the deserializer to be used

core/language/en-GB/Help/import.tid

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+title: $:/language/Help/import
+description: Import tiddlers from a file
+
+Import tiddlers from 2.x.x TiddlyWiki files (`.html`), `.tiddler`, `.tid`, `.json` or other files. The deserializer must be explicitly specified, unlike the load command which infers the deserializer from the file extension.
+
+```
+--import <filepath> <deserializer> [<title>] [<encoding>]
+```
+
+The deserializers in the core include:
+
+* application/javascript
+* application/json
+* application/x-tiddler
+* application/x-tiddler-html-div
+* application/x-tiddlers
+* text/html
+* text/plain
+
+The title of the imported tiddler defaults to the filename.
+
+The encoding defaults to "utf8", but can be "base64" for importing binary files.
+
+Note that TiddlyWiki will not import an older version of an already loaded plugin.

core/modules/commands/import.js

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+/*\
+title: $:/core/modules/commands/import.js
+type: application/javascript
+module-type: command
+
+Command to import tiddlers from a file
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+exports.info = {
+	name: "import",
+	synchronous: true
+};
+
+var Command = function(params,commander,callback) {
+	this.params = params;
+	this.commander = commander;
+	this.callback = callback;
+};
+
+Command.prototype.execute = function() {
+	var self = this,
+		fs = require("fs"),
+		path = require("path");
+	if(this.params.length < 2) {
+		return "Missing parameters";
+	}
+	var filename = self.params[0],
+		deserializer = self.params[1],
+		title = self.params[2] || filename,
+		encoding = self.params[3] || "utf8",
+		text = fs.readFileSync(filename,encoding),
+		tiddlers = this.commander.wiki.deserializeTiddlers(null,text,{title: title},{deserializer: deserializer});
+	$tw.utils.each(tiddlers,function(tiddler) {
+		self.commander.wiki.importTiddler(new $tw.Tiddler(tiddler));
+	});
+	this.commander.log(tiddlers.length + " tiddler(s) imported");
+	return null;
+};
+
+exports.Command = Command;
+
+})();

editions/tw5.com/tiddlers/commands/ImportCommand.tid

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+created: 20170712153850528
+modified: 20170712153850528
+tags: Commands
+title: ImportCommand
+type: text/vnd.tiddlywiki
+caption: fetch
+
+{{$:/language/Help/import}}