copies compiled binaries to ~/.pkg-cache

lib/build.js

@@ -1,6 +1,7 @@
 import { platform, targets } from './system.js';
 import chipo from 'child-process-promise';
 import chalk from 'chalk';
+import copyFile from './copy-file.js';
 import { localPath } from './places.js';
 import mkdirp from 'mkdirp-promise';
 import patchesJson from '../patches/patches.json';
@@ -56,14 +57,17 @@ async function main () {
           { stdio: 'inherit', cwd: nodePath });
       }
 
-      let outputBinary;
+      let output;
       if (windows) {
-        outputBinary = await compileOnWindows(target);
+        output = await compileOnWindows(target);
       } else {
-        outputBinary = await compileOnUnix(target);
+        output = await compileOnUnix(target);
       }
 
-      // TODO place to ~/.pkg-cache
+      const dest = localPath({ version,
+        nodeVersion, platform, arch: target });
+      await mkdirp(path.dirname(dest));
+      await copyFile(output, dest);
     }
   }
 }

lib/copy-file.js

@@ -0,0 +1,12 @@
+import fs from 'fs';
+
+export default function copyFile (src, dest) {
+  return new Promise((resolve, reject) => {
+    const rs = fs.createReadStream(src);
+    rs.on('error', reject);
+    const ws = fs.createWriteStream(dest);
+    ws.on('error', reject);
+    ws.on('finish', resolve);
+    rs.pipe(ws);
+  });
+}

lib/places.js

@@ -1,4 +1,6 @@
 import expandTemplate from 'expand-template';
+import os from 'os';
+import path from 'path';
 const expand = expandTemplate();
 
 const binaries = {
@@ -7,5 +9,7 @@ const binaries = {
 };
 
 export function localPath (opts) {
-  return expand(binaries.localPath, opts);
+  const p = binaries.localPath;
+  const atHome = p.replace('~', os.homedir());
+  return expand(path.resolve(atHome), opts);
 }