Updated Fetch SSM Parameter Logic

Signed-off-by: David Deal <dealako@gmail.com>

package.json

@@ -101,4 +101,4 @@
     }
   },
   "license": "MIT"
-}
+}

src/app/config/scripts/prefetch-ssm.js

@@ -10,15 +10,18 @@ const stageEnv = process.env.STAGE_ENV;
 const AWS_SSM_JSON_PATH = './src/app/config/cla-env-config.json';
 
 async function prefetchSSM() {
-  let result = {};
   console.log(`Start to fetch SSM values at ${stageEnv}...`);
-  result = await RetrieveSSMValues(configVarArray, stageEnv, region, profile);
+  const result = await RetrieveSSMValues(configVarArray, stageEnv, region, profile);
+  console.log('Fetching completed.');
 
   //test for local
   // result['cla-api-url'] = 'http://localhost:5000';
+  console.log(`Saving configuration to file: ${AWS_SSM_JSON_PATH}...`);
   fs.writeFile(AWS_SSM_JSON_PATH, JSON.stringify(result), function (err) {
-    if (err) throw new Error(`Couldn't save SSM paramters to disk with error ${err}`);
-    console.log('Fetching completed...');
+    if (err) {
+      throw new Error(`Couldn't save SSM parameters to disk with error ${err}`);
+    }
+    console.log('Save complete.');
   });
 }
 

src/app/config/scripts/read-ssm.js

@@ -12,9 +12,7 @@ const AWS = require('aws-sdk');
  * @returns {Promise<{ [key:string]: string}>}
  */
 async function retrieveSSMValues(variables, stage, region, profile) {
-    const scopedVariables = variables.map((param) => {
-        return `cla-${param}-${stage}`;
-    });
+    const scopedVariables = variables.map((param) => `cla-${param}-${stage}`);
     const result = await requestSSMParameters(scopedVariables, stage, region, profile);
     const parameters = result.Parameters;
     const error = result.$response.error;
@@ -24,8 +22,9 @@ async function retrieveSSMValues(variables, stage, region, profile) {
         );
     }
     const scopedParams = createParameterMap(parameters, stage);
-    let params;
+    const params = new Map();
     Object.keys(scopedParams).forEach((key) => {
+        // console.log(`processing ${key}`);
         const param = scopedParams[key];
         key = key.replace('cla-', '');
         key = key.replace(`-${stage}`, '');
@@ -39,23 +38,30 @@ async function retrieveSSMValues(variables, stage, region, profile) {
             );
         }
     });
+
     return params;
 }
 
 /**
+ * Performs a bulk request of the specified SSM parameters.
  * @param {string[]} variables
  * @param {string} stage
  * @param {string} region
+ * @param {string} profile
  */
-function requestSSMParameters(variables, stage, region, profile) {
+async function requestSSMParameters(variables, stage, region, profile) {
+    console.log(`Loading AWS credentials from profile: ${profile}`)
     AWS.config.credentials = new AWS.SharedIniFileCredentials({ profile });
-    const ssm = new AWS.SSM({ region: region });
+    const ssm = new AWS.SSM({ region });
     const ps = {
         Names: variables,
         WithDecryption: true
     };
-    console.log(AWS.config.credentials);
-    return ssm.getParameters(ps).promise();
+    // console.log(AWS.config.credentials);
+    // console.log(`fetching ssm parameters: ${variables}`);
+    const response = await ssm.getParameters(ps).promise();
+    // console.log(response);
+    return response;
 }
 
 /**