Hey Dad,

What is Bazel?

Wassim Chegham | @manekinekko

 This is an introduction to Bazel.

Bazel might not solve all of your issues! But it's worth trying.

DISCLAIMER

THANK YOU 💕

The build ecosystem is broken...

@ManekiNekko

@ManekiNekko

Build time       Number of files...

It takes a long time to rebuild...

@ManekiNekko

"It builds on my machine" syndrome.

@ManekiNekko

Wassim Chegham

Senior Developer Advocate

Microsoft

More at wassim.dev

CONTRIBUTIONS

Angular GDE (core team alumni.)

Bazel Web Team contributor

GDE for the Google Assistant

Angular Universal (original core team alumni.)

GDE for GCP (alumni.)

Auth0 Ambassador

Member of the Node.js org. (OpenJS Foundation)

NestJS contributor

Compodoc core team

More at wassim.dev

Open Source Creator

@ManekiNekko

@ManekiNekko

Supercharge your builds...

Bazel does not replace your favorite build tools.

 

It gives them superpowers!

@ManekiNekko

Bazel Benefits...

Incremental

Deterministic

Hermetic

Composable

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Universally Polyglot...

Android, C & C++, C#, Go, Groovy, Java, JavaScript, OCaml, C, Proto Buffers, Python, Rust, Sass, Scala, Shell, TypeScript, etc...

@ManekiNekko

Who's using Bazel?

@ManekiNekko

Bazel basic concepts...

Just what you need to know to get started

@ManekiNekko

Concept #1:                  file

Defines, loads and setups all the dependencies (external repositories).

WORKSPACE

@rules_nodejs// on master and ⬢ v14.1.0
➜ find ./ -iname "WORKSPACE"
.//WORKSPACE
.//examples/angular/WORKSPACE
.//examples/kotlin/WORKSPACE
.//examples/angular_view_engine/WORKSPACE
.//examples/nestjs/WORKSPACE
.//packages/labs/src/WORKSPACE
.//packages/typescript/src/WORKSPACE
.//packages/karma/src/WORKSPACE
.//packages/rollup/src/WORKSPACE
.//packages/terser/src/WORKSPACE
.//packages/jasmine/src/WORKSPACE
.//packages/protractor/src/WORKSPACE
.//e2e/jasmine/WORKSPACE
...

@ManekiNekko

Concept #1: Workspace

A package defines a set of instructions about how to build, test and run the current package.

@ManekiNekko

Concept #2: package

The primary unit of code organization in a workspace. A folder containing a file named

BUILD.bazel

@ManekiNekko

Concept #2:

BUILD.bazel

@rules_nodejs// on master and ⬢ v13.7.0
➜ find ./ -iname "BUILD.bazel"
./internal/BUILD.bazel
./internal/linker/test/BUILD.bazel
./internal/linker/BUILD.bazel
./internal/pkg_npm/test/BUILD.bazel
./internal/pkg_npm/BUILD.bazel
./internal/golden_file_test/BUILD.bazel
./internal/providers/BUILD.bazel
./internal/js_library/BUILD.bazel
./internal/common/test/BUILD.bazel
./internal/common/BUILD.bazel
./internal/bazel_integration_test/BUILD.bazel
./internal/node/test/lib1/BUILD.bazel
./internal/node/test/BUILD.bazel
...
package(default_visibility = ["//visibility:public"])
load("@io_bazel_rules_rust//rust:rust.bzl", "rust_binary")
load("@io_bazel_rules_rust//wasm_bindgen:wasm_bindgen.bzl", "rust_wasm_bindgen")

rust_binary(
    name = "hello_world_rust",
    srcs = ["main.rs"],
    edition = "2018",
    deps = [
        "@io_bazel_rules_rust//wasm_bindgen/raze:wasm_bindgen"
    ]   
)

rust_wasm_bindgen(
    name = "hello_world_bindgen",
    wasm_file = ":hello_world_rust",
    bindgen_flags = ["--nodejs"]
)

@ManekiNekko

Concept #2: Package content

Keep packages as fine-grained as possible to improve parallelism!

@ManekiNekko

Concept #2: Package PRO TIP 

The relationship between inputs and outputs, and the steps to build the outputs.

@ManekiNekko

Concept #3: Rule

@ManekiNekko

Concept #3: Rule example

# //src/lib/shorten/BUILD.bazel

ts_library(
    name = "shorten",
    srcs = ["shorten.ts"],
    module_name = "@bazel/shorten",
    module_root = "shorten",
    deps = [
        "//some/dep",
        "@npm//other/dep",
    ],
)

# Output: 
# - shorten.d.ts
# - shorten.js

Concept #3: Rules Composition

@ManekiNekko

ts_library()

rollup_bundle()

@angular/core/**/*.ts

./core.js

./core.d.ts

./bundles/core.umd.js

@ManekiNekko

Concept #4: Actions

action(x)=y

tsc -p tsconfig.json ...

ts_library()

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

Concept #5: Execution Graph

@ManekiNekko

Concept #6: Cache Graph

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

ACTION

@ManekiNekko

Concept #6: Cache Graph

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

@ManekiNekko

Concept #6: Cache Graph

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

@ManekiNekko

Concept #6: Cache Graph

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

SHA1

@ManekiNekko

Local Cache & Execution

code

local Bazel's cache

local Bazel execution

@ManekiNekko

code

Remote Bazel's cache

remote BAZEL execution

Dynamic Bazel execution

Remote Cache* & Execution*

* Needs to be configured separately! (read more)

@ManekiNekko

Remote Cache with Azure + Bazel remote

@ManekiNekko

# 1. create a VM on Azure, enable SSH and open port 4200
az group create --name bazel-remote-cache --location francecentral
az vm create --resource-group bazel-remote-cache --name bazelRemoteCache --image UbuntuLTS \
   --admin-username bazel --generate-ssh-keys
az vm open-port --port 4200 --resource-group bazel-remote-cache --name bazelRemoteCache

# 2. Access VM through SSH
ssh bazel@bazel-remote-cache-ip

# 3. Download a copy of bazel-remote
curl -L https://github.com/buchgr/bazel-remote/releases/download/v1.3.3/bazel-remote-1.3.3-linux-x86_64 > bazel-remote
chmod +x bazel-remote

# 4. Start bazel-remote server on port 4200
mkdir ./bazel-remote-cache
./bazel-remote --dir=./bazel-remote-cache --port=4200
bazel build //... --remote_cache=http://bazel-remote-cache-pi:4200

Demo: catsify.app

@ManekiNekko

Demo: catsify.app

@ManekiNekko

TypeScript

JavaScript

Rust

WASM

Node.js

Azure Functions

Demo: catsify.app

@ManekiNekko

Next runs...

First run...

Azure Static Web Apps CI/CD 🔥

@ManekiNekko

Try Bazel today!

Read the QuickStart

@ManekiNekko

 npm init @bazel my_workspace 

This was an intro to Bazel.

Check my other talk for an in-depth explanation!

@ManekiNekko

All cartoons used in this deck are under the Adobe Stock Standard License terms. Read more: https://stock.adobe.com/license-terms

Resources

dev.to/wassimchegham

dev.to/angular

dev.to/bazel

Hey Dad, what's Bazel?

By Wassim Chegham

Hey Dad, what's Bazel?

This is a short introduction to Bazel, the orchestration build and test tool. We will cover the concepts of Bazel such as Workspaces, Packages, and Labels, as well as writing custom rules. We will demo how to build a WASM code written in Rust and deploy it on Azure Functions.

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