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A naive in-house tool for building a Golang web application and managing frontend assets.

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Build a Golang web application, esp. the Assets

A naive in-house tool for building a Golang web application and managing frontend assets. We use this tool to build full web sites.

Features:

  • This is a intergration tool not a framework.
  • Go source files and assets files watching, which will trigger
    • Assets auto rebuilding, including javascripts, stylesheets, images and sprites
    • Go test running, only if the changed package contains go test source
    • Go binary rebuiling and server/app reloading
  • Assets building which depends on npm and browserify, provides supports for
    • ES6 transpiler via 6to5/babelify
    • React JSX file transpiler using 6to5/babelify jsx transformation
    • CoffeeScript transpiler via coffeeify
    • Sprite images generation, supporting different pixel ratio, sprite_xx@1x, sprite_xx@2x, sprite_xx@3x (go:pkg/image), and a coresponding sprite stylus funcs would be generated which we can import as the background image settings
    • Stylus css transpiler
    • Assets development and production mode via envyify (NODE_ENV)
    • Assets uglify and minimization
    • Assets fingerprints and will auto generate an assets mapping go code file in assets_gen.go
  • Distribution packing and cross compilation

Cmds

-> gobuildweb
gobuildweb > Build a Golang web application.

Usage:
  run       Will watch your file changes and run the application, aka the dev mode
  watch     just watch your file changes and run the application without building, aka the dev mode
  dist      Build your web application for production

We can pass the parameters to the target binary in the run/dev mode, e.g.

gobuildweb run -debug -web=:9090

GBW_DEBUG=1 gobuidlweb run would log all the gobuildweb debug information such as the exec.Command params and etc.

Assets

Assets are js files, css files and images files/sprite folders. The managed assets should be put into the assets/images, assets/javascripts, assets/stylesheets directory, and the generated assets would be inside public/images, public/javascripts, public/stylesheets, so please don't put non-generated files in those public folders (and we won't put any generated files into the git), but we won't touch the folder like public/fonts and etc.

In run/dev mode, the assets would be generated as the development version containing the source map, non-uglify and etc. In dist mode, the assets would be generated as the production version.

Project Configuration

We use a project.toml file for the basic configuration, and in run/dev mode, if the project.toml file changes, we will auto soft reload all the go and assets dependencies and rebuild/reload the web server. Here is some detail:

# This is the TOML config file for project: todo_server

[package]
# package name, the target binary name would be "todo_server-0.1.GOOS.GOARCH"
name = "todo_server"
version = "0.1"
authors = ["Todo Server Ltd."]

# Ignore some tests in run/dev mode
omit_tests = []

# only take effects on run/dev mode
build_opts = ["-race"] 

# if the server is a graceful server, the tool won't wait for the process termination
is_graceful = true 

# here is the golang dependencies, :P
deps = [
    "github.com/julienschmidt/httprouter"
]

[assets]
url_prefix = "/assets"
image_exts = [".png", ".jpg", ".jpeg"]

# where the assets_gen.go would be generated
assets_mapping_pkg = "main" 

# JS Modules dependencies, would be installed by NPM
deps = [
    "react@0.12.2",
    "reflux",
    "todomvc-common",
]

    # We can define multiple JS vendor_sets, which will create different JavaScript packages
    [[assets.vendor_set]]
    name = "vendor-react"
    requires = ["react/addons", "reflux"]

    # Assets Entry defines the managed assets and also their vendor dependencies
    [[assets.entry]]
    name = "todo_app"
    externals = ["vendor-react"]

[distribution]
build_opts = []

# We may need to pack the "templates" or some other stuff into the deploy target zip pack
# The public folder will auto be packed into the zip pack
pack_extras = ["templates"]

# The cross compile targets, the running machine's target would be added automaticly
# Seems we are missing the GOARM supports for linux arm arch
cross_targets = [
    ["linux", "amd64"],
]

Known Issues

  • We don't kown how to do browserify-shim stuff yet, like the bootstrap cannot be browserified with the NPM modules

You may ask

  • Why not using grunt, gulp, webpack and etc?
    • Because we are no nodejs experts and we want a single config file and a single tool for this
  • Why not using godep, nut for the go dependency?
    • We would like to provide a fallback method, just using go get, but other tools can be used
  • Why not watching the go template files?
    • This seems difficult to generalize, and our own render has the ability to recompile all the templates in debug mode, so we ain't need this, :)
  • What's the purpose of assets_gen.go?
    • We use this mapping to do assets url reverse, since we generated the assets with fingerprints then we can write some reverse inside the html templates like <img src="{{ assets "images/common/logo.png" }}">

Thank you very much and any suggestions would be appreciated.

License

MIT

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A naive in-house tool for building a Golang web application and managing frontend assets.

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