me3: A monorepo for personal projects

See ABOUT.md for background information, why this repo exists, why it's set up this way, etc.

Use bazel to build, test and execute all targets

Build targets and dependencies in this repo are managed by bazel, so there are BUILD.bazel files located in most directories.

Use make helpers for a few selected tasks

I've included a top-level Makefile with some helper targets: make gazelle, make gofmt and so on just to save some typing at the terminal.

Setup

• git clone this repo
• install bazelisk
• Now bazel build //... should work

OSX Notes

• brew install coreutils (in order to install the realpath cli command, which is used by bazel run //:go).

You should now be able to bazel build //..., bazel run //... etc whatever targets are defined in this repo.

Common development workflow tasks

Build/test/run something

Commands for updating, building, testing and running things in this repo:

• build: bazel build //<target>
• test: bazel test //<target>
• run: bazel run //<target>

Running a standard go command

Instead of running

go <command> <args...>

run this form:

bazel run //:go -- <command> <args...>

Doing so will make sure your go command is use the same toolchain and environment that bazel does when it deals with your go targets.

Manage go package dependencies

This is a little more complicated than it might be in a purely go-based project repo, but it's still pretty straightforward:

Suppose you want to use an external go package. We'll use github.com/urfave/cli/v2 as an example:

• run bazel run //:go -- get github.com/urfave/cli/v2 to update go.mod
• add "github.com/urfave/cli/v2" to your .go file's imports
• run make gazelle to update go_modules.bzl based on the aforementioned update to go.mod

Note that bazel build does not actually look at the contents of go.mod - it uses go_dependencies.bzl, which make gazelle generates from go.mod.

Manage NPM package dependencies

Use bazel run @pnpm instead of npm:

bazel run @pnpm -- install --dir $(pwd) <package name> [options...]

e.g.:

bazel run @pnpm --  install --dir $(pwd) -D prettier -w 

Manage python package dependencies

Edit requirements.in (NOT requirements.txt) to reflect your updated direct dependencies - packages your code actually imports, directly, by name.

• Add the name you would normally use for pip install <package-name> to requirements.in.
• You probably need to figure out which version of the package you need and also specify it on that same line, separated by ==. See requirements.in for examples.
• Run bazel run //:requirements.update in the root directory of this repo. This will generate the full requirements.txt file including all the direct dependency's transitive dependencies as well.
• In your py_binary or py_library etc target, you'll need to add new lines to the deps=[...] list: requirement("<package name>"),. (You may need to add load("@pip_deps//:requirements.bzl", "requirement") to that BUILD file if it's not there already.)

Other helpful bits

Maintaining BUILD targets by hand can be a pain. To automatically update BUILD.bazel files based on source import statements (and protobuf options, etc): run bazel run //:gazelle.