fix for nonworking print override, #15

README.md

@@ -399,6 +399,15 @@ log ({ foo: true, bar: 42 })
 
 ![pic](https://user-images.githubusercontent.com/1707/30799941-222a66a8-a1e7-11e7-89b5-4bed706c7840.png)
 
+You can also override the arguments stringification stage completely (see more on [overriding default behavior](https://github.com/xpl/ololog#overriding-the-default-behavior)):
+
+```javascript
+log = require ('ololog').configure ({ stringify (args, cfg) { return args.map (x => myCustomStringifier (x, cfg)) } })
+
+// ...providing additional configuration somewhere later...
+log = log.configure ({ stringify: { /* this object will be passed down as `cfg` to myCustomStringifier */ }})
+```
+
 # Pretty Printing `Error` Instances
 
 This feature is implemented in the [StackTracey](https://github.com/xpl/stacktracey#pretty-printing) library. See it's docs for more (you can configure the path shortening / library calls skipping).

ololog.js

@@ -68,7 +68,7 @@ const log = pipez ({
 
 /*  ------------------------------------------------------------------------ */
 
-    stringify: (args, cfg, print = stringify.configure (cfg)) => args.map (arg => (typeof arg === 'string') ? arg : print (arg)),
+    stringify: (args, cfg, print = cfg.print || stringify.configure (cfg)) => args.map (arg => (typeof arg === 'string') ? arg : print (arg)),
 
     trim: (tokens, { max = undefined }) => !max ? tokens : tokens.map (t => stringify.limit (t, max)),
 

test.js

@@ -218,6 +218,17 @@ describe ('Ololog', () => {
             assert (() => log.error ('an error'), ['\u001b[22m\u001b[1m\u001b[31m ERROR\t\u001b[39m\u001b[22man error'], 'error')
         })
     }
+
+    it ('custom stringifier works', () => {
+
+        // specifying custom printer
+        let log = ololog.configure ({ locate: false, stringify: { print (x) { return 'foo!' } } })
+        assert (() => log (42), ['foo!'])
+
+        // overriding stringify stage completely
+        log = ololog.configure ({ locate: false, stringify (args, cfg) { return args.map (x => 'foo!') } })
+        assert (() => log (42, 24), ['foo! foo!'])
+    })
 })