Lesson 7: Hardhat Fund Me module.exports.tags = ["all", "mocks"]. Tags Usage [solved]

[tinyhodler]

In video 10:48:32 , Patrick types

module.exports.tags = ["all", "mocks"]

But don't know what tags are used. I googled and found nobody uses or explains "module.exports.tags". Could someone help?

The code is in here

const { network } = require("hardhat");
const {
    developmentChains,
    DECIMALS,
    INITIAL_ANSWER,
} = require("../helper-hardhat-config");

module.exports = async ({ getNamedAccounts, deployments }) => {
    const { deploy, log } = deployments;
    const { deployer } = await getNamedAccounts();
    // const chainId = network.config.chainId;

    // if (chainId != )
    if (developmentChains.includes(network.name)) {
        log("Local network detected! Deploying mocks...");
        await deploy("MockV3Aggregator", {
            contract: "MockV3Aggregator",
            from: deployer,
            log: true,
            args: [DECIMALS, INITIAL_ANSWER],
        });
        log("Mocks deployed!");
        log("___________________________");
    }
};

module.exports.tags = ["all", "mocks"];

[gmluqa]

The tags are to specify what scripts will get ran when mentioning which tag.
For example, the code in your comment is the mock deploy, lets say we only want to run that one specific mock deploy script (in the deploy folder we have: 01-deploy-fund-me.js and just 00-deploy-mocks.js we just wanna deploy 00-deploy-mocks.js).
When we run yarn hardhat deploy, by default it runs every script in the deploy folder, so running yarn hardhat deploy would run 00-mocks.js and also 01-deploy-fund-me.js.
By adding module.exports.tags = ["all", "mocks"]; in the mock script, it allows us to run yarn hardhat deploy --tags mocks and our deploy command will only run scripts that have "mocks" in their module.exports.tags.

[tinyhodler]

The tags are to specify what scripts will get ran when mentioning which tag. For example, the code in your comment is the mock deploy, lets say we only want to run that one specific mock deploy script (in the deploy folder we have: 01-deploy-fund-me.js and just 00-deploy-mocks.js we just wanna deploy 00-deploy-mocks.js). When we run yarn hardhat deploy, by default it runs every script in the deploy folder, so running yarn hardhat deploy would run 00-mocks.js and also 01-deploy-fund-me.js. By adding module.exports.tags = ["all", "mocks"]; in the mock script, it allows us to run yarn hardhat deploy --tags mocks and our deploy command will only run scripts that have "mocks" in their module.exports.tags.

Thank you sir!

I modified the code to
module.exports.tags = ["aa", "bb","cc"];

and the type following 3 commands to the terminal. They show the same output.

npx hardhat deploy --tags aa
npx hardhat deploy --tags bb
npx hardhat deploy --tags cc

output

Nothing to compile
Local network detected! Deploying mocks...
deploying "MockV3Aggregator" (tx: 0x2f60bd4cba5dffe33cd22380f4891cfadb7f13aad763bb084e8a1c3336b892f9)...: 
deployed at 0x5FbDB2315678afecb367f032d93F642f64180aa3 with 569635 gas
Mocks deployed!
___________________________

I don't know what is the differences among aa, bb, cc. and "all" and "mocks".

[gmluqa]

Yeah, the difference is that they are tags named however by the developer.
Try adding module.exports.tags = ["aa",] to your 01-deploy-fund-me.js and running npx hardhat deploy --tags aa
What should happen is that hardhat detects that the scripts using "aa" are 00-mock and 01-deploy, and both should be deployed!
Now if you run npx hardhat deploy --tags bb, only the mock script should deploy since the bb tag isn't in your 01 deploy script.
I am no expert but I can imagine that when running specific tests to run specific scripts, you tag them so that just by calling npx hardhat deploy --tags whateverTagYouWantToCall only the scripts exporting the tag called execute.

[tinyhodler]

Thank you Sir!