Add input from STDIN

Add option for input encoding

.github/workflows/node.js.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 14.x]
+        node-version: [10.x, 12.x, 14.x, 16.x]
 
     steps:
     - uses: actions/checkout@v2

.npmignore

@@ -1,3 +1,2 @@
 test/
-.github
-.idea
+.github/

README.md

@@ -18,17 +18,19 @@ This tool is basically a tiny wrapper around [js-yaml](https://github.com/nodeca
 Usage: yaml-sort [options]
 
 Options:
-  --input, -i      The YAML file(s) which needs to be sorted  [array] [required]
-  --output, -o     The YAML file to output sorted content to  [string]
-  --stdout, -s     Output the proposed sort to STDOUT only  [boolean] [default: false]
-  --check, -k      Check if the given file(s) is already sorted  [boolean] [default: false]
-  --indent, --id   Indentation width to use (in spaces)  [number] [default: 2]
-  --lineWidth, -w  Wrap line width  [number] [default: 80]
-  -h, --help       Show help  [boolean]
-  --version        Show version number  [boolean]
+  -i, --input         The YAML file(s) which needs to be sorted  [array] [default: "-"]
+  -o, --output        The YAML file to output sorted content to  [string]
+  -s, --stdout        Output the proposed sort to STDOUT only  [boolean] [default: false]
+  -k, --check         Check if the given file(s) is already sorted  [boolean] [default: false]
+      --indent, --id  Indentation width to use (in spaces)  [number] [default: 2]
+  -e, --encoding      Input encoding  [choices: "ascii", "utf8", "utf16le"] [default: "utf8"]
+  -w, --lineWidth     Wrap line width  [number] [default: 80]
+  -h, --help          Show help  [boolean]
+      --version       Show version number  [boolean]
 
 Examples:
-  yaml-sort --input config.yml                                 Sorts alphabetically and overwrites the file config.yml.
+  yaml-sort --input config.yml                                 Sorts alphabetically and overwrites the file config.yml
   yaml-sort --input config.yml --lineWidth 100 --stdout        Sorts the file config.yml and output result to STDOUT wrapped to 100 columns
-  yaml-sort --input config.yml --indent 4 --output sorted.yml  Indents with 4 spaces and outputs result to file sorted.yml.
+  yaml-sort --input config.yml --indent 4 --output sorted.yml  Indents with 4 spaces and outputs result to file sorted.yml
+  cat config.yml | yaml-sort                                   Sorts alphabetically from STDIN
 ```

package.json

@@ -1,6 +1,6 @@
 {
   "name": "yaml-sort",
-  "version": "1.1.1",
+  "version": "1.2.0",
   "description": "CLI tool to sort YAML files alphabetically",
   "main": "yaml-sort.js",
   "scripts": {

test/test.js

@@ -6,10 +6,31 @@ const test = require('tape')
 const spawn = require('tape-spawn')
 const opts = { cwd: __dirname }
 
+test('CLI --help', (t) => {
+  const proc = spawn(t, '../yaml-sort.js -h', opts)
+  proc.stdout.match(/^Usage:/)
+  proc.stderr.match('')
+  proc.exitCode(0)
+  proc.end()
+})
+
 test('CLI w/o arg', (t) => {
   const proc = spawn(t, '../yaml-sort.js', opts)
+  proc.stdout.match('')
   proc.exitCode(1)
-  proc.stderr.match(/Missing required argument: input/)
+  proc.end()
+})
+
+test('CLI w/o arg (STDIN)', (t) => {
+  const proc = spawn(t, 'cat test.yml | ../yaml-sort.js', opts)
+  proc.exitCode(0)
+  proc.stdout.match('a: Lorem ipsum dolor sit amet, consectetur adipiscing elit...\n' +
+      'b:\n' +
+      '  b: 35\n' +
+      '  c:\n' +
+      '    d: false\n' +
+      '\n')
+  proc.stderr.match('')
   proc.end()
 })
 
@@ -22,6 +43,7 @@ test('CLI w/ arg', (t) => {
         '  c:\n' +
         '    d: false\n' +
         '\n')
+  proc.stderr.match('')
   proc.end()
 })
 
@@ -36,6 +58,22 @@ test('CLI --output', (t) => {
         '  b: 35\n' +
         '  c:\n' +
         '    d: false\n')
+  proc.stderr.match('')
+  proc.end()
+})
+
+test('CLI --output (STDIN)', (t) => {
+  const proc = spawn(t,
+    'cat test.yml | ../yaml-sort.js --input - --output output.yml' +
+      ' && cat output.yml' +
+      ' && rm -f output.yml', opts)
+  proc.exitCode(0)
+  proc.stdout.match('a: Lorem ipsum dolor sit amet, consectetur adipiscing elit...\n' +
+      'b:\n' +
+      '  b: 35\n' +
+      '  c:\n' +
+      '    d: false\n')
+  proc.stderr.match('')
   proc.end()
 })
 
@@ -48,6 +86,7 @@ test('CLI --indent', (t) => {
         '    c:\n' +
         '        d: false\n' +
         '\n')
+  proc.stderr.match('')
   proc.end()
 })
 
@@ -62,6 +101,7 @@ test('CLI --lineWidth', (t) => {
         '  c:\n' +
         '    d: false\n' +
         '\n')
+  proc.stderr.match('')
   proc.end()
 })
 
@@ -79,6 +119,24 @@ test('CLI --check SUCCESS', (t) => {
     '../yaml-sort.js --input sorted.yml --check', opts)
   proc.exitCode(0)
   proc.stdout.match('')
+  proc.stderr.match('')
+  proc.end()
+})
+
+test('CLI --encoding FAIL', (t) => {
+  const proc = spawn(t,
+    '../yaml-sort.js --input test-utf16le.yml --stdout', opts)
+  proc.exitCode(1)
+  proc.stdout.match('')
+  proc.stderr.match(/null byte is not allowed in input/)
+  proc.end()
+})
+
+test('CLI --encoding SUCCESS', (t) => {
+  const proc = spawn(t,
+    '../yaml-sort.js --input test-utf16le.yml --stdout --encoding utf16le', opts)
+  proc.exitCode(0)
+  proc.stderr.match('')
   proc.end()
 })
 
@@ -89,5 +147,24 @@ test('CLI --lineWidth SUCCESS', (t) => {
         ' && rm -f output.yml', opts)
   proc.exitCode(0)
   proc.stdout.match('')
+  proc.stderr.match('')
+  proc.end()
+})
+
+test('CLI --output --stdout FAIL', (t) => {
+  const proc = spawn(t,
+    '../yaml-sort.js --input test.yml --stdout --output output.yml', opts)
+  proc.exitCode(1)
+  proc.stdout.match('')
+  proc.stderr.match(/Arguments stdout and output are mutually exclusive/)
+  proc.end()
+})
+
+test('CLI --check --stdout FAIL', (t) => {
+  const proc = spawn(t,
+    '../yaml-sort.js --input test.yml --check --stdout', opts)
+  proc.exitCode(1)
+  proc.stdout.match('')
+  proc.stderr.match(/Arguments check and stdout are mutually exclusive/)
   proc.end()
 })

yaml-sort.js

@@ -2,24 +2,26 @@
 
 'use strict'
 
-const argv = require('yargs')
+const fs = require('fs')
+const yaml = require('js-yaml')
+const yargs = require('yargs')
+
+const argv = yargs
   .usage('Usage: $0 [options]')
-  .example(
-    '$0 --input config.yml',
-    'Sorts alphabetically and overwrites the file config.yml'
-  )
-  .example(
-    '$0 --input config.yml --lineWidth 100 --stdout',
-    'Sorts the file config.yml and output result to STDOUT wrapped to 100 columns'
-  )
-  .example(
-    '$0 --input config.yml --indent 4 --output sorted.yml',
-    'Indents with 4 spaces and outputs result to file sorted.yml'
-  )
+  .example([
+    ['$0 --input config.yml',
+      'Sorts alphabetically and overwrites the file config.yml'],
+    ['$0 --input config.yml --lineWidth 100 --stdout',
+      'Sorts the file config.yml and output result to STDOUT wrapped to 100 columns'],
+    ['$0 --input config.yml --indent 4 --output sorted.yml',
+      'Indents with 4 spaces and outputs result to file sorted.yml'],
+    ['cat config.yml | $0',
+      'Sorts alphabetically from STDIN']
+  ])
   .option('input', {
     alias: 'i',
     describe: 'The YAML file(s) which needs to be sorted',
-    demandOption: 'Please provide an input file',
+    default: '-',
     string: true,
     array: true
   })
@@ -30,14 +32,14 @@ const argv = require('yargs')
   })
   .option('stdout', {
     alias: 's',
-    default: false,
     describe: 'Output the proposed sort to STDOUT only',
+    conflicts: 'output',
     boolean: true
   })
   .option('check', {
     alias: 'k',
-    default: false,
     describe: 'Check if the given file(s) is already sorted',
+    conflicts: ['output', 'stdout'],
     boolean: true
   })
   .option('indent', {
@@ -46,27 +48,36 @@ const argv = require('yargs')
     describe: 'Indentation width to use (in spaces)',
     number: true
   })
+  .option('encoding', {
+    alias: 'e',
+    default: 'utf8',
+    describe: 'Input encoding',
+    choices: ['ascii', 'utf8', 'utf16le']
+  })
   .option('lineWidth', {
     alias: 'w',
     default: 80,
     describe: 'Wrap line width',
     number: true
   })
-  .demandOption(['input'])
   .help('h')
   .alias('h', 'help')
   .version()
   .wrap(null)
   .argv
 
-const yaml = require('js-yaml')
-const fs = require('fs')
-
 let success = true
 
 argv.input.forEach((file) => {
   try {
-    const content = fs.readFileSync(file, 'utf8')
+    const isStdin = file === '-'
+
+    if (isStdin && process.stdin.isTTY) {
+      yargs.showHelp()
+      process.exit(22)
+    }
+
+    const content = fs.readFileSync(isStdin ? process.stdin.fd : file, argv.encoding)
 
     const sorted = yaml.dump(yaml.load(content), {
       sortKeys: true,
@@ -79,15 +90,16 @@ argv.input.forEach((file) => {
         success = false
         console.warn(`'${file}' is not sorted and/or formatted (indent, line width).`)
       }
-    } else if (argv.stdout) {
+    } else if (argv.stdout || (isStdin && !argv.output)) {
       console.log(sorted)
     } else {
       fs.writeFile(
         argv.output ? argv.output : file,
         sorted,
         (error) => {
           if (error) {
-            return console.error(error)
+            success = false
+            console.error(error)
           }
         })
     }