186 lines
5.6 KiB
Markdown
186 lines
5.6 KiB
Markdown
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# motto
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[](https://travis-ci.org/ddliu/motto)
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Modular [otto](https://github.com/robertkrimen/otto)
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Motto provide a Nodejs like module environment to run javascript files in golang.
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## Installation
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```bash
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go get github.com/ddliu/motto
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```
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## Usage
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```js
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var _ = require('underscore');
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var data = require('./data.json'); // [3, 2, 1, 4, 6]
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module.exports = _.min(data);
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```
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```go
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package main
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import (
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"github.com/ddliu/motto"
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_ "github.com/ddliu/motto/underscore"
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)
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func main() {
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motto.Run("path/to/index.js")
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}
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```
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You can also install the motto command line tool to run it directly:
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```bash
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go install github.com/ddliu/motto/motto
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motto path/to/index.js
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```
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## Modules
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The module environment is almost capable with Nodejs [spec](http://nodejs.org/api/modules.html).
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Some Nodejs modules(without core module dependencies) can be used directly in Motto.
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## Addons
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Motto can be extended with addons, below is an example addon which implement part of the "fs" module of Nodejs:
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```go
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package fs
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import (
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"github.com/ddliu/motto"
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"github.com/robertkrimen/otto"
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)
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func fsModuleLoader(vm *motto.Motto) (otto.Value, error) {
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fs, _ := vm.Object(`({})`)
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fs.Set("readFileSync", func(call otto.FunctionCall) otto.Value {
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filename, _ := call.Argument(0).ToString()
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bytes, err := ioutil.ReadFile(filename)
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if err != nil {
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return otto.UndefinedValue()
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}
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v, _ := call.Otto.ToValue(string(bytes))
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return v
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})
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return vm.ToValue(fs)
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}
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func init() {
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motto.AddModule("fs", fsModuleLoader)
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}
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```
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After import this package, you can `require` it directly in your js file:
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```js
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var fs = require('fs');
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var content = fs.readFileSync('/path/to/data');
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```
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## Nodejs in Golang?
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[nodego](https://github.com/ddliu/nodego) implements some features and core modules
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of Nodejs.
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## Performance
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Simple benchmark shows below for furthur performance optimize:
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```bash
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strace -c -Ttt motto tests/index.js
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strace -c -Ttt node tests/index.js
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```
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Motto:
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```
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% time seconds usecs/call calls errors syscall
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------ ----------- ----------- --------- --------- ----------------
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20.20 0.000144 2 59 rt_sigaction
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15.71 0.000112 7 15 mmap
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11.92 0.000085 11 8 futex
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10.10 0.000072 6 13 4 stat
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7.43 0.000053 7 8 read
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5.89 0.000042 21 2 clone
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5.75 0.000041 10 4 open
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4.77 0.000034 7 5 rt_sigprocmask
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4.63 0.000033 33 1 execve
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3.23 0.000023 12 2 write
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2.24 0.000016 4 4 fstat
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1.82 0.000013 3 4 close
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1.82 0.000013 13 1 sched_getaffinity
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1.68 0.000012 12 1 sched_yield
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0.98 0.000007 7 1 munmap
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0.98 0.000007 7 1 arch_prctl
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0.42 0.000003 3 1 getcwd
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0.42 0.000003 3 1 sigaltstack
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------ ----------- ----------- --------- --------- ----------------
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100.00 0.000713 131 4 total
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```
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Nodejs:
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```
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% time seconds usecs/call calls errors syscall
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------ ----------- ----------- --------- --------- ----------------
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20.15 0.000636 7 92 mmap
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17.78 0.000561 16 36 munmap
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13.97 0.000441 18 24 read
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7.73 0.000244 7 35 mprotect
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7.70 0.000243 15 16 brk
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7.32 0.000231 7 34 1 futex
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4.56 0.000144 7 22 open
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3.61 0.000114 5 22 15 ioctl
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2.15 0.000068 3 21 close
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2.03 0.000064 3 21 fstat
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2.00 0.000063 5 14 14 access
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1.58 0.000050 4 12 lstat
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1.24 0.000039 8 5 write
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1.24 0.000039 6 7 rt_sigaction
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1.05 0.000033 6 6 2 stat
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0.89 0.000028 28 1 readlink
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0.76 0.000024 5 5 rt_sigprocmask
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0.70 0.000022 6 4 getcwd
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0.67 0.000021 11 2 pipe2
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0.63 0.000020 20 1 clone
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0.38 0.000012 6 2 getrlimit
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0.29 0.000009 9 1 epoll_create1
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0.25 0.000008 8 1 eventfd2
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0.22 0.000007 7 1 clock_gettime
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0.22 0.000007 4 2 epoll_ctl
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0.19 0.000006 6 1 gettid
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0.19 0.000006 6 1 set_tid_address
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0.19 0.000006 6 1 set_robust_list
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0.13 0.000004 4 1 execve
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0.10 0.000003 3 1 arch_prctl
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0.10 0.000003 3 1 epoll_wait
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------ ----------- ----------- --------- --------- ----------------
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100.00 0.003156 393 32 total
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```
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## Changelog
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### v0.1.0 (2014-06-22)
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Initial release
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### v0.2.0 (2014-06-24)
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Make module capable with Nodejs
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### v0.3.0 (2014-06-26)
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Rewrite module.
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Make it easier to write addons.
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Add underscore addon as an example.
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