feat: add validation

package.json

@@ -9,6 +9,7 @@
   "license": "GPL-3.0-only",
   "dependencies": {
     "deepmerge": "4.2.2",
+    "diff": "^4.0.2",
     "json2md": "1.9.0",
     "yaml": "1.10.0",
     "yargs": "16.0.3"

src/generator.js

@@ -2,6 +2,7 @@ const fs = require('fs')
 const path = require('path')
 
 const deepMerge = require('deepmerge')
+const diff = require('diff')
 const json2md = require('json2md')
 const yaml = require('yaml')
 const yargs = require('yargs')
@@ -16,11 +17,17 @@ const argv = yargs
     description: 'Path to a DargStack stack project',
     type: 'string'
   })
+  .option('validate', {
+    alias: 'v',
+    description: 'Flag that enabled validation only',
+    type: 'boolean'
+  })
   .help()
   .alias('help', 'h')
   .argv
 
 const projectPath = argv.path || process.cwd()
+const validate = argv.validate || false
 
 const stackDevelopmentPath = path.join(projectPath, 'src', 'development', 'stack.yml')
 const stackProductionPath = path.join(projectPath, 'src', 'production', 'production.yml')
@@ -177,4 +184,42 @@ const mdjson = [
   })
 ]
 
-console.log(json2md(mdjson))
+const md = json2md(mdjson)
+
+if (validate) {
+  const readmePath = path.join(projectPath, 'README.md')
+  let readme
+
+  if (fs.existsSync(readmePath)) {
+    readme = fs.readFileSync(readmePath, 'utf8')
+  } else {
+    console.error('README.md file not found!')
+    process.exit(1)
+  }
+
+  const difference = diff.diffLines(md + '\n', readme)
+
+  if (difference.length > 1) {
+    difference.forEach((part) => {
+      let color = part.added ? 'green'
+        : part.removed ? 'red' : 'grey'
+
+      switch (color) {
+        case 'green':
+          color = '[32m'
+          break
+        case 'red':
+          color = '[31m'
+          break
+        default:
+          color = '[0m'
+      }
+
+      process.stderr.write('\x1b' + color + part.value + '\x1b[0m')
+    })
+
+    process.exit(difference.length)
+  }
+} else {
+  console.log(md)
+}

yarn.lock

@@ -555,6 +555,11 @@ define-properties@^1.1.2, define-properties@^1.1.3:
   dependencies:
     object-keys "^1.0.12"
 
+diff@^4.0.2:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.2.tgz#60f3aecb89d5fae520c11aa19efc2bb982aade7d"
+  integrity sha512-58lmxKSA4BNyLz+HHMUzlOEpg09FV+ev6ZMe3vJihgdxzgcwZ8VoEEPmALCZG9LmqfVoNMMKpttIYTVG6uDY7A==
+
 doctrine@1.5.0:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/doctrine/-/doctrine-1.5.0.tgz#379dce730f6166f76cefa4e6707a159b02c5a6fa"