feat: make node-jq a peer dependency

README.md

@@ -384,6 +384,16 @@ foo bar
 
 ```
 
+To use `roarr filter` program, you must install peer dependency `node-jq`:
+
+```bash
+# If Roarr is installed locally:
+$ npm install node-jq
+# or, if Roarr is installed globally:
+$ npm install node-jq -g
+
+```
+
 ### `pretty-print` program
 
 Roarr `pretty-print` CLI program pretty-prints logs for the development purposes.

package.json

@@ -13,7 +13,7 @@
   "dependencies": {
     "boolean": "^0.1.3",
     "chalk": "^2.4.1",
-    "node-jq": "^1.3.1",
+    "optional": "^0.1.4",
     "prettyjson": "^1.2.1",
     "semver-compare": "^1.0.0",
     "split2": "^2.2.0",
@@ -71,6 +71,9 @@
     ],
     "sourceMap": false
   },
+  "peerDependencies": {
+    "node-jq": "^1.3.1"
+  },
   "repository": {
     "type": "git",
     "url": "git@github.com:gajus/roarr.git"

src/bin/commands/filter.js

@@ -2,9 +2,7 @@
 
 import split from 'split2';
 import through from 'through2';
-import {
-  run
-} from 'node-jq';
+import optional from 'optional';
 import {
   isRoarrLine
 } from './utilities';
@@ -19,7 +17,7 @@ type LogFilterConfigurationType = {|
   +jqExpression: string
 |};
 
-const filterLog = (configuration: LogFilterConfigurationType, line: string, callback: (error?: Error, line?: string) => {}) => {
+const filterLog = (run, configuration: LogFilterConfigurationType, line: string, callback: (error?: Error, line?: string) => {}) => {
   if (!isRoarrLine(line)) {
     callback(undefined, configuration.excludeOrphans ? '' : line + '\n');
 
@@ -54,13 +52,19 @@ export const builder = (yargs: Object) => {
 };
 
 export const handler = (argv: ArgvType) => {
+  const jq = optional('node-jq');
+
+  if (!jq) {
+    throw new Error('Must install `node-jq` dependency to use `roarr filter`.');
+  }
+
   // argv
   process.stdin
     .pipe(split())
     .pipe(through((chunk, encoding, callback) => {
       const line = chunk.toString();
 
-      filterLog(argv, line, callback);
+      filterLog(jq.run, argv, line, callback);
     }))
     .pipe(process.stdout);
 };