atomic write for serviceDumper and templateEvaluer

app/service-dumper.js

@@ -2,6 +2,7 @@ const yaml = require('js-yaml')
 const logger = require('./logger')
 const fs = require('fs')
 const k8D = require('./k8-data')
+const writeFileAtomicSync = require('write-file-atomic').sync
 
 function mergeServices(s1,s2) {
   for (let k in s2) {
@@ -85,7 +86,7 @@ exports.serviceDumper = function(args) {
       }
       let res = yaml.safeDump(sss, {sortKeys: true})
       if (outFile.length > 0)
-        fs.writeFileSync(outFile, res, {encoding:'utf8'})
+        writeFileAtomicSync(outFile, res, {encoding:'utf8'})
       else
         console.log(res)
       process.exit(0)

app/template-evaluer.js

@@ -3,6 +3,7 @@ const logger = require('./logger')
 const fs = require('fs')
 const stringify = require('json-stringify-safe')
 const components = require('./components')
+const writeFileAtomicSync = require('write-file-atomic').sync
 
 function mergeServices(s1,s2) {
   for (let k in s2) {
@@ -63,7 +64,7 @@ exports.templateEvaluer = function(args) {
     let inF = fs.readFileSync(inFile, {encoding:'utf8'})
     let outF = components.templatize(inF)(replacements)
     if (outFile.length > 0)
-      fs.writeFileSync(outFile, outF, { encoding: 'utf8'})
+      writeFileAtomicSync(outFile, outF, { encoding: 'utf8'})
     else
       console.log(outF)
   }

package.json

@@ -48,7 +48,8 @@
     "passport-local": "^1.0.0",
     "passport-saml": "https://gitlab.rzg.mpg.de/nomad-lab/passport-saml/repository/archive.tar.gz?ref=master",
     "redis": "^2.6.3",
-    "winston": "^3.1.0"
+    "winston": "^3.1.0",
+    "write-file-atomic": "^2.3.0"
   },
   "devDependencies": {
     "bower": "1.7.9"