cli: signed-integrity now has "json" output mode, and it is default (ref. #66)

plugins/signed-integrity/cli.js

@@ -167,14 +167,14 @@ let getFileIntegrity = async (path, algos) => {
  * paths     - paths to files for which integrity files are to be generated
  * keyfile   - path of the file containing the private key to use
  * algos     - array of SubtleCrypto.digest-compatible hashing algorithms (default: ["SHA-256"])
- * output    - whether to output the signed integrity data to "files" or "text" (default)
+ * output    - whether to output the signed integrity data to "files", or as "text" or "json" (default)
  * extension - file extension to use when saving integrity files (default: ".integrity")
  */
 let genSignedIntegrity = async (
                                 paths,
                                 keyfile,
                                 algos=["SHA-256"],
-                                output='files',
+                                output='json',
                                 extension='.integrity') => {
     
     // load the key
@@ -200,7 +200,7 @@ let genSignedIntegrity = async (
                         )
     
     // initialize the result
-    let result = ''
+    let result = {}
     
     // do the thing for each path
     for (const path of paths) {
@@ -239,16 +239,21 @@ let genSignedIntegrity = async (
         let jwt = header + '.' + payload + '.' + signature
         
         // do we want output to text or files
-        if (output == 'text') {
-            result += `${path}: ${jwt}\n`
-        } else {
+        result[path] = jwt
+        if (output == 'files') {
             // write it out to {path}.extension
             Deno.writeTextFileSync(path + extension, jwt)
         }
     }
     
     // return whatever we have to return
-    return result;
+    if (output == 'json') {
+        return JSON.stringify(result);
+    } else if (output == 'text') {
+        return Object.keys(result).map(p=>`${p}: ${result[p]}`).join('\n') + '\n'
+    } else if (output == 'files') {
+        return "created integrity files:\n" + Object.keys(result).map(p=>`- ${p}${extension}`).join('\n') + "\n"
+    }
 }
 
 // this never changes
@@ -289,8 +294,8 @@ const pluginActions = {
                 default: "SHA-256"
             },
             output: {
-                description: "output mode: 'files' or 'text'",
-                default: 'text',
+                description: "output mode: 'files', 'text', or 'json'",
+                default: 'json',
                 string: true
             },
             extension: {