fun commandline js tools: render.js (like nik2img.py) and inspect.js …

…(pass it a shapefile, geojson, or mapnik xml and get back info)

bin/inspect.js

@@ -1,9 +1,8 @@
 #!/usr/bin/env node
 
-var sys = require('fs');
 var path = require('path');
 
-var usage = 'usage: inspect.js <datasource>';
+var usage = 'usage:\n inspect.js <datasource> \n inspect.js <stylesheet>';
 
 var ds = process.ARGV[2];
 if (!ds) {
@@ -26,7 +25,12 @@ else if ((/.json$/.test(ds)) || (/.geojson$/.test(ds))) {
     var opened = new mapnik.Datasource({type: 'ogr', file: ds, 'layer_by_index': 0});
     console.log(opened.describe());
 }
+else if (/.xml$/.test(ds)) {
+    var map = new mapnik.Map(1,1);
+    map.load(ds);
+    console.log(map.layers());
+}
 else {
-    console.log('only currently supports shapefiles and geojson');
+    console.log('only currently supports shapefiles and geojson datasources or mapnik xml');
     process.exit(1);
 }

bin/render.js

@@ -0,0 +1,26 @@
+#!/usr/bin/env node
+
+var sys = require('fs');
+var child_process = require('child_process');
+
+var usage = 'usage: render.js <stylesheet> <image>'
+
+var stylesheet = process.ARGV[2];
+if (!stylesheet) {
+   console.log(usage);
+   process.exit(1);
+}
+
+var image = process.ARGV[3];
+if (!image) {
+   console.log(usage);
+   process.exit(1);
+}
+
+var mapnik = require("mapnik");
+
+var map = new mapnik.Map(600,400);
+map.load(stylesheet);
+map.zoom_all();
+map.render_to_file(image);
+child_process.exec('open ' + image)