Fix EAGAIN.

bin/topojson

@@ -151,7 +151,7 @@ var argv = optimist
     })
     .check(function(argv) {
       if (argv.help) return;
-      if (argv.version) return console.log(topojson.version), process.exit(0);
+      if (argv.version) return process.stdout.write(topojson.version + "\n"), process.exit(0);
       if (!argv._.length) argv._ = ["-"];
       if (+argv.s && +argv["simplify-proportion"]) throw new Error("--simplify and --simplify-proportion are exclusive");
       if (+argv["simplify-proportion"] < 0 || +argv["simplify-proportion"] >= 1) throw new Error("--simplify-proportion must be between 0 and 1");
@@ -256,7 +256,8 @@ function inputJson(file, callback) {
 }
 
 function output(error) {
-  if (error) return console.trace(error);
+  if (error) throw error;
+
   var options = {
     "verbose": true,
     "pre-quantization": +argv.q0,

lib/topojson/prune.js

@@ -47,7 +47,7 @@ module.exports = function(topology, options) {
     pruneGeometry(objects[key]);
   }
 
-  if (verbose) console.warn("prune: retained " + newArcCount + " / " + oldArcCount + " arcs (" + Math.round(newArcCount / oldArcCount * 100) + "%)");
+  if (verbose) process.stderr.write("prune: retained " + newArcCount + " / " + oldArcCount + " arcs (" + Math.round(newArcCount / oldArcCount * 100) + "%)\n");
 
   return topology;
 };

lib/topojson/simplify.js

@@ -26,7 +26,7 @@ module.exports = function(topology, options) {
     });
     var n = areas.length;
     options["minimum-area"] = minimumArea = n ? areas.sort(function(a, b) { return b - a; })[Math.max(0, Math.ceil((N - 1) * retainProportion + n - N))] : 0;
-    if (verbose) console.warn("simplification: effective minimum area " + minimumArea.toPrecision(3));
+    if (verbose) process.stderr.write("simplification: effective minimum area " + minimumArea.toPrecision(3) + "\n");
   }
 
   topology.arcs.forEach(topology.transform ? function(arc) {
@@ -102,7 +102,7 @@ module.exports = function(topology, options) {
     M += arc.length = (j || 1) + 1;
   });
 
-  if (verbose) console.warn("simplification: retained " + M + " / " + N + " points (" + Math.round((M / N) * 100) + "%)");
+  if (verbose) process.stderr.write("simplification: retained " + M + " / " + N + " points (" + Math.round((M / N) * 100) + "%)\n");
 
   return topology;
 };

lib/topojson/topology.js

@@ -69,14 +69,14 @@ module.exports = function(objects, options) {
   }
 
   if (verbose) {
-    console.warn("bounds: " + bbox.join(" ") + " (" + system.name + ")");
+    process.stderr.write("bounds: " + bbox.join(" ") + " (" + system.name + ")\n");
   }
 
   // Pre-topology quantization.
   if (Q0) {
     transform = prequantize(objects, bbox, Q0, Q1);
     if (verbose) {
-      console.warn("pre-quantization: " + transform.scale.map(function(k) { return system.formatDistance(k); }).join(" "));
+      process.stderr.write("pre-quantization: " + transform.scale.map(function(k) { return system.formatDistance(k); }).join(" ") + "\n");
     }
   }
 
@@ -90,15 +90,15 @@ module.exports = function(objects, options) {
   if (Q0) topology.transform = transform;
   topology.bbox = bbox;
   if (verbose) {
-    console.warn("topology: " + topology.arcs.length + " arcs, " + topology.arcs.reduce(function(p, v) { return p + v.length; }, 0) + " points");
+    process.stderr.write("topology: " + topology.arcs.length + " arcs, " + topology.arcs.reduce(function(p, v) { return p + v.length; }, 0) + " points\n");
   }
 
   // Post-topology quantization.
   if (Q1 && Q1 !== Q0) {
     postquantize(topology, Q0, Q1);
     transform = topology.transform;
     if (verbose) {
-      console.warn("post-quantization: " + transform.scale.map(function(k) { return system.formatDistance(k); }).join(" "));
+      process.stderr.write("post-quantization: " + transform.scale.map(function(k) { return system.formatDistance(k); }).join(" ") + "\n");
     }
   }
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "topojson",
-  "version": "1.6.23",
+  "version": "1.6.24",
   "description": "An extension to GeoJSON that encodes topology.",
   "keywords": [
     "topojson",