init

lib/checkSystem.js

@@ -0,0 +1,122 @@
+'use strict'
+
+const check = function(pathToPackage) {
+  const path = require('path')
+  const Promise = require('bluebird')
+  const exec = Promise.promisify(require('child_process').exec)
+  const _ = require('lodash')
+  const fs = require('fs')
+  const jsonfile = require('jsonfile')
+  const validaterRules = require('./validatorRules')
+  const promiseHelpers = require('./promiseHelpers')
+
+  let engines
+
+  const checkerResult = {
+    status: 0,
+    message: '',
+    packages: []
+  }
+
+  const packageJsonPath = pathToPackage || path.join(process.cwd(), 'package.json')
+  try {
+    fs.accessSync(packageJsonPath)
+    engines = jsonfile.readFileSync(packageJsonPath).engines
+  } catch (ex) {
+    checkerResult.message = {
+      text: '✘ No package.json found in the current directory so I can\'t validate what you need!',
+      type: 'error'
+    }
+    checkerResult.status = -1
+
+    return Promise.resolve(checkerResult)
+  }
+
+  if (!engines) {
+    checkerResult.message = {
+      text: '✘ No engines found in package.json so I can\'t validate what you need!',
+      type: 'error'
+    }
+    checkerResult.status = -1
+
+    return Promise.resolve(checkerResult)
+  }
+
+  const thingsToCheck = Object.getOwnPropertyNames(engines)
+  const validatorPromises = thingsToCheck.map(validate) // run the function over all items.
+
+  return promiseHelpers.allSettled(validatorPromises)
+    .then((inspections) => {
+      const environmentIsValid = _.every(inspections,
+        (inspection) => inspection.isFulfilled() && inspection.value())
+
+      if (environmentIsValid) {
+        checkerResult.message = {
+          text: 'Environment looks good!',
+          type: 'success'
+        }
+      } else {
+        checkerResult.message = {
+          text: 'Environment is invalid!',
+          type: 'error'
+        }
+      }
+      return checkerResult
+    })
+
+  function validate(name) {
+    // find it in the validators
+    const validator = validaterRules[name]
+
+    if (validator === undefined) {
+      checkerResult.packages.push({
+        name: name,
+        validatorFound: false,
+        type: 'warn'
+      })
+      return Promise.resolve(false)
+    }
+
+    // call the validator and pass in the version we expect
+    return execAndCheck(validator, engines[name]).then((results) => {
+      if (results.result) {
+        checkerResult.packages.push({
+          name: name,
+          validatorFound: true,
+          expectedVersion: engines[name],
+          foundVersion: engines[name],
+          type: 'success'
+        })
+      } else {
+        checkerResult.packages.push({
+          name: name,
+          validatorFound: true,
+          expectedVersion: engines[name],
+          foundVersion: results.reason.trim() || 'missing',
+          type: 'error'
+        })
+      }
+
+      return Promise.resolve(results.result)
+    }).catch((error) => {
+      checkerResult.packages.push({
+        name: name,
+        validatorFound: true,
+        expectedVersion: engines[name],
+        commandError: error,
+        type: 'error'
+      })
+      return Promise.reject()
+    })
+  }
+
+  function execAndCheck(validator, expectedVersion) {
+    return exec(validator.versionCheck).then((result) => {
+      return {
+        result: validator.versionValidate(result, expectedVersion),
+        reason: result
+      }
+    }).catch((e) => { throw e })
+  }
+}
+module.exports = check