go-giter8

btnguyen2k/go-giter8 is a fork of savaki/go-giter8, which is a command line tool to generate files and directories from templates published on git repository. It's implemented in Go and can produce output for any purpose.

Features:

• Generate template output from any git repository.
• Generate template outout from a specific git branch or tag.
• Generate template output from local directory (protocol file://).
• Support scaffolding.

Latest version: v0.6.0.

Installation

go-giter8 is go-module enabled. Therefore, it must be installed/upgraded in go-module mode by setting GO111MODULE=on.

You can install go-giter8 using the standard go deployment tool. This will install g8 as $GOPATH/bin/g8:

export GO111MODULE=on && go get github.com/btnguyen2k/go-giter8/g8

or you can specified a specific version:

export GO111MODULE=on && go get github.com/btnguyen2k/go-giter8/g8@v0.6.0

Upgrading

At any point you can upgrade g8 using the following:

export GO111MODULE=on && go get -u github.com/btnguyen2k/go-giter8/g8

or you can specified a specific version:

export GO111MODULE=on && go get -u github.com/btnguyen2k/go-giter8/g8@v0.6.0

Giter8 template

For information on Giter8 templates, please see http://www.foundweekends.org/giter8/.

Summary of a Giter8 template project structure:

<root>/
└── src/main/
    ├── g8/
    │   └── <template source files & directories>
    └── scaffolds/
        ├── <name1>/
        │   ├── default.properties
        │   └── <source files & directories of scaffold 1>
        ├── <name2>/
        │   ├── default.properties
        │   └── <source files & directories of scaffold 2>
        │   ...
        └── <nameN>/
            ├── default.properties
            └── <source files & directories of scaffold N>

Usage

A template must reside in a git repository and be named with the suffix .g8. The syntax of go-giter8 is slightly different from the original giter8.

Sample template: btnguyen2k/go-giter8-sample.g8.

New Project

To create a new project from a template, for example, btnguyen2k/go-giter8-sample.g8:

$ g8 new btnguyen2k/go-giter8-sample.g8

A specific branch or tag can be use with syntax @tagOrBranchName:

$ g8 new btnguyen2k/go-giter8-sample.g8@branchName

or

$ g8 new btnguyen2k/go-giter8-sample.g8@tagName

By default, the template is cloned from Github. Use full repo url to create project from a template resided in other git server:

$ g8 new https://gitlab.com/btnguyen2k/go-giter8-sample.g8

or

$ g8 new https://gitlab.com/btnguyen2k/go-giter8-sample.g8@branchName

or

$ g8 new https://gitlab.com/btnguyen2k/go-giter8-sample.g8@tagName

go-giter8 uses your git binary (from default location /usr/bin/git) underneath the hood so any settings you've applied to git will also be picked up by g8. If git binary is not installed at the default location, specify the git binary with --git /path/to/git.

go-giter8 can also generate template output from local directory (useful when testing template before publishing):

$ g8 new file:///home/btnguyen2k/workspace/go-giter8-sample.g8

Files & directories under /src/main/g8/ are used to generate project.

Scaffolds under /src/main/scaffolds/ are copied to .g8/ under project's target directory.

Template placeholders and substitutions are defined in default.properties file. See section Formatting Template Fields below.

Scaffolding

Scaffolds can be generated by standing at generated project's root directory and run the following command:

$ g8 scaffold <scafold-name>

For example:

$ g8 scaffold bodao_mysql

Scaffold placeholders and substitutions are defined in default.properties files. See section Formatting Template Fields below.

Scaffolding is available since v0.4.0.

Formatting Template Fields

go-giter8 has built-in support for formatting template fields. Formatting options can be added when referencing fields. For example, the name field can be formatted in upper camel case with:

$name;format="Camel"$

If name field has value myName, the above formatting will transform to MyName.

The formatting options are:

FuncName | Alternative Name
---------|--------------------------------------------------------------------------------
upper    | uppercase       : all uppercase letters
lower    | lowercase       : all lowercase letters
cap      | capitalize      : uppercase first letter
decap    | decapitalize    : lowercase first letter
start    |                 : uppercase the first letter of each word
word     |                 : remove all non-word letters (only a-zA-Z0-9_)
Camel    |                 : upper camel case (start-case, word-only)
camel    |                 : lower camel case (start-case, word-only, decapitalize)
hyphen   | hyphenate       : replace spaces with hyphens
norm     | normalize       : all lowercase with hyphens (lowercase, hyphenate)
snake    |                 : replace spaces and dots with underscores
packaged |                 : replace dots with slashes (net.databinder -> net/databinder)
random   |                 : appends random characters to the given string

Project level fields are defined in /src/main/g8/default.properties file.

Scaffold level fields are defined in /src/main/scaffolds/<scaffold-name>/default.properties file.

Sample of default.properties:

description  = This template generates a microservices project in Go using Echo framework.
verbatim     = .DS_Store .gitignore .gitlab-ci.yml go.mod go.sum release.sh public/* vendor/* views/*

name         = go_echo-microservices-seed
shortname    = gems
desc         = Microservices project template for Go using Echo
organization = com.github.btnguyen2k
app_author   = Thanh Nguyen <btnguyen2k@gmail.com>
app_version  = 0.1.0
timezone     = Asia/Ho_Chi_Minh

Special fields:

• description: description of the template. It will be excluded from substitution list.
• verbatim: list of file patterns (separated by space, comma, semi-colon or colon) such as *.gif,*.png *.ico. Files matching verbatim pattern are excluded from string template processing. verbatim field will be excluded from substitution list.
• name: it is used as the name of a project being created. go-giter8 creates a project directory based off that name (normalized) that will contain the template output.

It is recommended that name follows the format [a-zA-Z0-9]+ (only numbers and character). Use camelCase to separate words (not underscores!).