TodoFinder

todofinder is a tool that search for comment containing a specific key pattern such as "TODO" or "FIXME" in golang packages, and display results to the end-user with essential informations (files name, lines, comments)

The tool has two execution mode :

• search mode : results are display in console stdout. It is the mode by default
• server mode : service run as an API server on port 8080 by default

$ go run todofinder/cmd/todofinder.go -package fmt -pattern TODO 
/usr/local/go/src/fmt/scan.go : 740 :
TODO： accept N and Ni independently?

Installation

The project uses "dep", a prototype dependency management tool for Go. For more information, please visit https://github.com/golang/dep

% go get -u github.com/thomasxnguy/todofinder
% dep ensure (for Golang v1.9+)

Usage

$ todofinder -h
usage: todofinder <command>
The commands are:
   search - run in command line  (*default)
   server - run in server mode

search [-package input_package_name] [-pattern input_search_pattern]
  -package string
       package to search
  -pattern string
       patttern to search

Command Line mode

$ go run todofinder/cmd/todofinder.go -h

or

$ go run todofinder/cmd/todofinder.go search -h

Usage of search:
  -package string
       package to search
  -pattern string
       patttern to search

Example

$ go run todofinder/cmd/todofinder.go -package fmt -pattern TODO 
/usr/local/go/src/fmt/scan.go : 740 :
TODO： accept N and Ni independently?

Server mode

$ go run todofinder/cmd/todofinder.go server -h

Usage of server:
  -config string
    	configuration file path

Run in server mode

$ go run todofinder/cmd/todofinder.go server -config todofinder/conf/todofinder.yaml

The application runs as an HTTP server at port 8080 (default). It provides the following RESTful endpoints:

• GET /search: search a specific pattern in all .go file from a package

Example API request

$ go run todofinder/cmd/todofinder.go server -config todofinder/conf/todofinder.yaml &
$ curl -XGET 'localhost:8080/search?package=fmt&pattern=TODO'
{
    "result": [
        {
            "file": "/usr/local/Cellar/go/1.6.3/libexec/src/fmt/format.go",
            "pos": 332,
            "com": "TODO: Avoid buffer by pre-padding.\n"
        },
        {
            "file": "/usr/local/Cellar/go/1.6.3/libexec/src/fmt/scan.go",
            "pos": 747,
            "com": "TODO: accept N and Ni independently?\n"
        }
    ]
}

API Error codes

Error Code	Description
NOT_FOUND	Resource was not found
METHOD_NOT_ALLOWED	Call endpoint using a not supported method
INTERNAL_SERVER_ERROR	An issue occurred server side
UNAUTHORIZED	User is not authorized to call this resource
BAD_PARAMETER	Call endpoint using a bad or missing parameter
PACKAGE_NOT_FOUND	Cannot find the package to search on
NO_SOURCE	The package does not contain valid source
SOURCE_NOT_READABLE	The package .go source files are not readable

Packages

This service uses the following Go packages which can be easily replaced with your own favorite :

• FastHttp : Lightweight http server which is 10x faster than net/http. Benchmark and source are here
• Logrus : Structured logger for Go here
• Gingko/Gomega : BDD Testing framework for golang here
• Viper : Configuration solution for golang that can handle all types of formats and support watcher here
• Ozzo-Validation : Configurable and extensible data validator here
• Dep : Go dependency management tool here

Integration tests and benchmarks

This project contains a folder 'itest' containing integration tests and benchmark for todofinder service. It needs

• Baloo, an expressive and versatile end-to-end HTTP API testing made in Go : https://github.com/h2non/baloo
• Golang v1.7+

Benchmark result

Benchmark_WrongEndpoint-4    	  500000	      3467 ns/op
Benchmark_BadParameters-4    	  500000	      3632 ns/op
Benchmark_BadMethod-4        	 1000000	      2332 ns/op
Benchmark_SearchEndpoint-4   	  500000	      2569 ns/op