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README.md

@@ -54,14 +54,14 @@ cat .gitignore | js -ti 'x.trim().split(`\n`)' \
 ```shell
 # lodash is also integrated in
 # https://github.com/lodash/lodash
-echo '[1,2,3,4]' | js '_.filter(x, x => x %2)'  \
+echo '[1,2,3,4]' | js '_.filter(x, x => x % 2)'  \
   | js '_.reverse(x)'  \
-  >> file
+  > file
 
 # or in chain
 echo '[1,2,3,4]'  \
-  | js '_(x).filter(x => x %2).reverse().value()'  \
-  >> file
+  | js '_(x).filter(x => x % 2).reverse().value()'  \
+  > file
 ```
 
 Don't forget to take an alias if you want.
@@ -78,6 +78,7 @@ alias js="jayin"
 - `-c`: shortcut of exec(cmd)
 - `x`: current input value
 - `i`: current index value (with -e)
+- `_`: lodash
 - `exec(cmd)`: child_process.execSync(cmd)
 
 jayin is based on [through2](https://github.com/rvagg/through2).

index.js

@@ -5,6 +5,7 @@
 // todo: maybe JacksonTian/bufferhelper?
 // todo: minimist for friendly cli handling?
 // vm: https://nodejs.org/api/vm.html
+'use strict'
 var through2 = require('through2')
 var _ = require('lodash')
 var cp = require('child_process')

test.js

@@ -1,20 +1,16 @@
 /* global describe, it, after */
+'use strict'
 const BufferHelper = require('bufferhelper')
 const assert = require('assert')
-const chmodSync = require('child_process').chmodSync
-const execSync = require('child_process').execSync
-const spawn = require('child_process').spawn
+const cp = require('child_process')
 const fs = require('fs')
 
 // todo: more test cases
 
-// execSync('chmod +x ./index.js')
-// execSync('alias js="./index.js"') // not work with spawn
-
 describe('jayin', () => {
   it ('x', (done) => {
     const helper = new BufferHelper()
-    const js = spawn('node', ['./index.js', 'x.slice(2, 4)'])
+    const js = cp.spawn('node', ['./index.js', 'x.slice(2, 4)'])
     js.stdout.once('end', () => {
       assert.equal(helper.toString(), '[3,4]')
       done()
@@ -27,7 +23,7 @@ describe('jayin', () => {
 
   it('-t', (done) => {
     const helper = new BufferHelper()
-    const js = spawn('node', ['./index.js', '-t', 'x.slice(1, -1).replace(/,/g, `\n`)'])
+    const js = cp.spawn('node', ['./index.js', '-t', 'x.slice(1, -1).replace(/,/g, `\n`)'])
     js.stdout.once('end', () => {
       assert.equal(helper.toString(), '1\n2\n3\n4\n5')
       done()
@@ -40,7 +36,7 @@ describe('jayin', () => {
 
   it('exprs', (done) => {
     const helper = new BufferHelper()
-    const js = spawn('node', ['./index.js', 'x.filter(x => x % 2)', 'x.reverse()'])
+    const js = cp.spawn('node', ['./index.js', 'x.filter(x => x % 2)', 'x.reverse()'])
     js.stdout.once('end', () => {
       assert.equal(helper.toString(), '[3,1]')
       done()
@@ -53,7 +49,7 @@ describe('jayin', () => {
 
   it('no expr', (done) => {
     const helper = new BufferHelper()
-    const js = spawn('node', ['./index.js'])
+    const js = cp.spawn('node', ['./index.js'])
     js.stdout.once('end', () => {
       assert.equal(helper.toString(), '[1,2,3,4]')
       done()
@@ -66,7 +62,7 @@ describe('jayin', () => {
 
   it('_, _.filter, _.reverse', (done) => {
     const helper = new BufferHelper()
-    const js = spawn('node', ['./index.js', '_(x).filter(x => x % 2).reverse().value()'])
+    const js = cp.spawn('node', ['./index.js', '_(x).filter(x => x % 2).reverse().value()'])
     js.stdout.once('end', () => {
       assert.equal(helper.toString(), '[3,1]')
       done()
@@ -82,12 +78,12 @@ describe('jayin', () => {
     // const env = { count: 0 }
     // execSync('count=0')
     const helper = new BufferHelper()
-    const js = spawn('node', ['./index.js', '-e', '-c', 'echo "${i}: ${x}" >> tmp'])
+    const js = cp.spawn('node', ['./index.js', '-e', '-c', 'echo "${i}: ${x}" >> tmp'])
     js.stdout.once('end', () => {
       // assert.equal(execSync('echo $count').toString(), '15')
       // assert.equal(env.count, '15')
       assert.equal(helper.toString(), '["a","b","c"]') // in chain
-      assert.equal(execSync('cat tmp').toString(), '0: a\n1: b\n2: c\n')
+      assert.equal(cp.execSync('cat tmp').toString(), '0: a\n1: b\n2: c\n')
       done()
     })
     js.stdout.on('data', (chunk) => {