MSB3428: Could not load the Visual C++ component "VCBuild.exe"

Looks like someone hasn't follows the installation instructions correctly...

Error: Command failed: C:\some-python3x-path\python.EXE

node-gyp (used to build better-sqlite3) is not compatible with Python 3. Yes, it's been 10 years since 3's release. Yes, it sucks. But you need to have python 2.7.x in your path to install better-sqlite3. If you're not using python anywhere else, uninstall it and make sure to follow my installation instructions. If you are, run npm config set python python2.7 before running the install again.

Upgrading to enmap v4 requires a little bit of migration, as Enmap 4 changed the internal method by which data is stored, slightly. To use this migration:

• Make a copy of your current app in a new folder.

• Create a new folder "on the same level" as your bot. Name it something like "migrate"

• You should now have 3 folders. Something like mybots/coolbot , mybots/coolbot-copy , mybots/migrate/

• In the migrate folder, run npm i enmap@3.1.4 enmap-sqlite@latest , as well as whatever source provider you need if it's not sqlite (in my example, npm i enmap-mongo@latest

You should now have something like the following image.

In the migrate folder, create an index.js and use the following script for migration. Note that it's an example, change the provider option to fit what you're actually using.

const Enmap = require("enmap");
const Provider = require("enmap-mongo");
const SQLite = require("enmap-sqlite");

let options = { 
  name: "test",
  user: "username",
  host: "yourhost",
  collection: "enmap",
  password: "password",
  port: 55258
};

const source = new Provider(options); 
const target = new SQLite({"name": "test", dataDir: '../coolbot-copy/data'});
Enmap.migrate(source, target).then( () => process.exit(0) );

Very important: the "target" must be enmap-sqlite. Enmap v4 only supports an sqlite-backend.

From the migrate folder, run node index.js, which should correctly migrate your data.

Simpler migration from enmap-sqlite

If you're using enmap-sqlite already, you don't really need to do the entire thing above. Adding a single file called migrate.js to your project folder, then running it with node migrate.js will convert the format and then all you need is to modify the code for Enmap 4. Stilll, I recommend backing up your bot first. Just in case.

const Enmap = require("enmap");
const SQLite = require("enmap-sqlite");

const source = new SQLite({"name": "test"});
const target = new SQLite({"name": "test"});
Enmap.migrate(source, target).then( () => process.exit(0) );

Code Changes

There is very little you need to change when moving to Enmap 4. The only changes that are required after migrating is the initialization of your Enmap which is now simpler.

// Change From: 
const Enmap = require("enmap");
const Provider = require("enmap-mongo");

client.points = new Enmap({provider: new Provider({name: "points", url: "blah"});

// Change To: 
const Enmap = require("enmap");
client.points = new Enmap({name: "points"});

If using Enmap.multi(), the change is just as simple:

// Change from V3:  
const Enmap = require("enmap");
const Provider = require("enmap-mongo");

Object.assign(client, Enmap.multi(["settings", "tags"], Provider, { url: "blah" }));

// Change to V4: 
const Enmap = require("enmap");
Object.assign(client, Enmap.multi(["settings", "tags"]));

The rest of your code (all interactions with Enmap) can remain the same - there should be no need to edit any of it.

Installing V4

Once your data is migrating and the code is changed, you can go ahead and install enmap version 4 through npm i enmap@latest in your "new" bot folder (the target of the migration). This will take a few minutes (it needs to rebuild sqlite) and output that 4.0.x is now installed. Start the bot, and it should be working! If it doesn't, join the support server and we'll help you out ^_^.

Installing enmap

To install Enmap in your project, all you need to do is run the following command:

npm i enmap@latest

This may take a few minutes, then you're ready to use it.

Peer Dependencies

For persistence you need to also install better-sqlite-pool, which is necessary for the sqlite database interaction.

Pre-Requisites

better-sqlite-pool has a specific pre-requisite which is needed to build it. How to install these depends on your operating system, so see below for instructions:

npm i -g --add-python-to-path --vs2015 --production windows-build-tools

Once those pre-requisites are installed, simply run the following command:

npm i better-sqlite-pool

This will take a few minutes also, as it needs to build the module from source code.