3 files changed, 256 insertions, 9 deletions

diff --git a/package-lock.json b/package-lock.json
index 1d1085f..2637fdc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4,11 +4,44 @@
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
+    "balanced-match": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.0.tgz",
+      "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
+    },
     "base64-js": {
       "version": "1.3.0",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.3.0.tgz",
       "integrity": "sha512-ccav/yGvoa80BQDljCxsmmQ3Xvx60/UpBIij5QN21W3wBi/hhIC9OoO+KLpu9IJTS9j4DRVJ3aDDF9cMSoa2lw=="
     },
+    "big-integer": {
+      "version": "1.6.43",
+      "resolved": "https://registry.npmjs.org/big-integer/-/big-integer-1.6.43.tgz",
+      "integrity": "sha512-9dULc9jsKmXl0Aeunug8wbF+58n+hQoFjqClN7WeZwGLh0XJUWyJJ9Ee+Ep+Ql/J9fRsTVaeThp8MhiCCrY0Jg=="
+    },
+    "binary": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/binary/-/binary-0.3.0.tgz",
+      "integrity": "sha1-n2BVO8XOjDOG87VTz/R0Yq3sqnk=",
+      "requires": {
+        "buffers": "~0.1.1",
+        "chainsaw": "~0.1.0"
+      }
+    },
+    "bluebird": {
+      "version": "3.4.7",
+      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-3.4.7.tgz",
+      "integrity": "sha1-9y12C+Cbf3bQjtj66Ysomo0F+rM="
+    },
+    "brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "requires": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
     "buffer": {
       "version": "5.2.1",
       "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
@@ -18,11 +51,39 @@
         "ieee754": "^1.1.4"
       }
     },
+    "buffer-indexof-polyfill": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/buffer-indexof-polyfill/-/buffer-indexof-polyfill-1.0.1.tgz",
+      "integrity": "sha1-qfuAbOgUXVQoUQznLyeLs2OmOL8="
+    },
+    "buffers": {
+      "version": "0.1.1",
+      "resolved": "https://registry.npmjs.org/buffers/-/buffers-0.1.1.tgz",
+      "integrity": "sha1-skV5w77U1tOWru5tmorn9Ugqt7s="
+    },
+    "chainsaw": {
+      "version": "0.1.0",
+      "resolved": "https://registry.npmjs.org/chainsaw/-/chainsaw-0.1.0.tgz",
+      "integrity": "sha1-XqtQsor+WAdNDVgpE4iCi15fvJg=",
+      "requires": {
+        "traverse": ">=0.3.0 <0.4"
+      }
+    },
     "chownr": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.1.tgz",
       "integrity": "sha512-j38EvO5+LHX84jlo6h4UzmOwi0UgW61WRyPtJz4qaadK5eY3BTS5TY/S1Stc3Uk2lIM6TPevAlULiEJwie860g=="
     },
+    "concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
+    },
+    "core-util-is": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
+      "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
+    },
     "debug": {
       "version": "3.2.6",
       "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
@@ -31,6 +92,14 @@
         "ms": "^2.1.1"
       }
     },
+    "duplexer2": {
+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/duplexer2/-/duplexer2-0.1.4.tgz",
+      "integrity": "sha1-ixLauHjA1p4+eJEFFmKjL8a93ME=",
+      "requires": {
+        "readable-stream": "^2.0.2"
+      }
+    },
     "follow-redirects": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.7.0.tgz",
@@ -47,11 +116,77 @@
         "minipass": "^2.2.1"
       }
     },
+    "fs.realpath": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
+      "integrity": "sha1-FQStJSMVjKpA20onh8sBQRmU6k8="
+    },
+    "fstream": {
+      "version": "1.0.12",
+      "resolved": "https://registry.npmjs.org/fstream/-/fstream-1.0.12.tgz",
+      "integrity": "sha512-WvJ193OHa0GHPEL+AycEJgxvBEwyfRkN1vhjca23OaPVMCaLCXTd5qAu82AjTcgP1UJmytkOKb63Ypde7raDIg==",
+      "requires": {
+        "graceful-fs": "^4.1.2",
+        "inherits": "~2.0.0",
+        "mkdirp": ">=0.5 0",
+        "rimraf": "2"
+      }
+    },
+    "glob": {
+      "version": "7.1.4",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.1.4.tgz",
+      "integrity": "sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==",
+      "requires": {
+        "fs.realpath": "^1.0.0",
+        "inflight": "^1.0.4",
+        "inherits": "2",
+        "minimatch": "^3.0.4",
+        "once": "^1.3.0",
+        "path-is-absolute": "^1.0.0"
+      }
+    },
+    "graceful-fs": {
+      "version": "4.1.15",
+      "resolved": "https://registry.npmjs.org/graceful-fs/-/graceful-fs-4.1.15.tgz",
+      "integrity": "sha512-6uHUhOPEBgQ24HM+r6b/QwWfZq+yiFcipKFrOFiBEnWdy5sdzYoi+pJeQaPI5qOLRFqWmAXUPQNsielzdLoecA=="
+    },
     "ieee754": {
       "version": "1.1.13",
       "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.1.13.tgz",
       "integrity": "sha512-4vf7I2LYV/HaWerSo3XmlMkp5eZ83i+/CDluXi/IGTs/O1sejBNhTtnxzmRZfvOUqj7lZjqHkeTvpgSFDlWZTg=="
     },
+    "inflight": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+      "integrity": "sha1-Sb1jMdfQLQwJvJEKEHW6gWW1bfk=",
+      "requires": {
+        "once": "^1.3.0",
+        "wrappy": "1"
+      }
+    },
+    "inherits": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.3.tgz",
+      "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
+    },
+    "isarray": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
+      "integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
+    },
+    "listenercount": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/listenercount/-/listenercount-1.0.1.tgz",
+      "integrity": "sha1-hMinKrWcRyUyFIDJdeZQg0LnCTc="
+    },
+    "minimatch": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.0.4.tgz",
+      "integrity": "sha512-yJHVQEhyqPLUTgt9B83PXu6W3rx4MvvHvSUvToogpwoGDOUQ+yDrR0HRot+yOCdCO7u4hX3pWft6kWBBcqh0UA==",
+      "requires": {
+        "brace-expansion": "^1.1.7"
+      }
+    },
     "minimist": {
       "version": "0.0.8",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
@@ -87,11 +222,64 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
       "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
     },
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18="
+    },
+    "process-nextick-args": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.0.tgz",
+      "integrity": "sha512-MtEC1TqN0EU5nephaJ4rAtThHtC86dNN9qCuEhtshvpVBkAW5ZO7BASN9REnF9eoXGcRub+pFuKEpOHE+HbEMw=="
+    },
+    "readable-stream": {
+      "version": "2.3.6",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+      "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+      "requires": {
+        "core-util-is": "~1.0.0",
+        "inherits": "~2.0.3",
+        "isarray": "~1.0.0",
+        "process-nextick-args": "~2.0.0",
+        "safe-buffer": "~5.1.1",
+        "string_decoder": "~1.1.1",
+        "util-deprecate": "~1.0.1"
+      }
+    },
+    "rimraf": {
+      "version": "2.6.3",
+      "resolved": "https://registry.npmjs.org/rimraf/-/rimraf-2.6.3.tgz",
+      "integrity": "sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA==",
+      "requires": {
+        "glob": "^7.1.3"
+      }
+    },
     "safe-buffer": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
       "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
     },
+    "setimmediate": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/setimmediate/-/setimmediate-1.0.5.tgz",
+      "integrity": "sha1-KQy7Iy4waULX1+qbg3Mqt4VvgoU="
+    },
+    "string_decoder": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
+      "integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
+      "requires": {
+        "safe-buffer": "~5.1.0"
+      }
+    },
     "tar": {
       "version": "4.4.8",
       "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.8.tgz",
@@ -111,6 +299,11 @@
       "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
       "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
     },
+    "traverse": {
+      "version": "0.3.9",
+      "resolved": "https://registry.npmjs.org/traverse/-/traverse-0.3.9.tgz",
+      "integrity": "sha1-cXuPIgzAu3tE5AUUwisui7xw2Lk="
+    },
     "unbzip2-stream": {
       "version": "1.3.3",
       "resolved": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.3.3.tgz",
@@ -120,6 +313,32 @@
         "through": "^2.3.8"
       }
     },
+    "unzipper": {
+      "version": "0.9.12",
+      "resolved": "https://registry.npmjs.org/unzipper/-/unzipper-0.9.12.tgz",
+      "integrity": "sha512-ioVN0AD0AC03CEsfxfChfOzsE9nhitbv9uLVhtCH0P1trBmntnosFNGVTe9tKV2g4bPxroVe4y8bxUuRMD6IHQ==",
+      "requires": {
+        "big-integer": "^1.6.17",
+        "binary": "~0.3.0",
+        "bluebird": "~3.4.1",
+        "buffer-indexof-polyfill": "~1.0.0",
+        "duplexer2": "~0.1.4",
+        "fstream": "^1.0.12",
+        "listenercount": "~1.0.1",
+        "readable-stream": "~2.3.6",
+        "setimmediate": "~1.0.4"
+      }
+    },
+    "util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    },
     "yallist": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
diff --git a/package.json b/package.json
index c9f735e..f81e02c 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,8 @@
   "version": "1.0.0",
   "description": "NPM package for `dhall-json`, based on https://github.com/justinwoo/npm-psc-package-bin-simple.",
   "os": [
-    "linux"
+    "linux",
+    "win32"
   ],
   "cpu": [
     "x64"
@@ -12,8 +13,8 @@
     "preinstall.js"
   ],
   "bin": {
-    "dhall-to-json": "bin/dhall-to-json",
-    "dhall-to-yaml": "bin/dhall-to-yaml"
+    "dhall-to-json": "bin/dhall-to-json.exe",
+    "dhall-to-yaml": "bin/dhall-to-yaml.exe"
   },
   "scripts": {
     "preinstall": "node ./preinstall.js"
@@ -30,6 +31,7 @@
   "dependencies": {
     "follow-redirects": "^1.7.0",
     "tar": "^4.4.8",
-    "unbzip2-stream": "^1.3.3"
+    "unbzip2-stream": "^1.3.3",
+    "unzipper": "^0.9.12"
   }
 }
diff --git a/preinstall.js b/preinstall.js
index 1b859fc..071f159 100644
--- a/preinstall.js
+++ b/preinstall.js
@@ -1,10 +1,15 @@
 "use strict";
 
+const fs = require("fs");
+const path = require("path");
+
 const { https } = require("follow-redirects");
 const tar = require("tar");
 const unbz2 = require("unbzip2-stream");
+const unzipper = require("unzipper");
 
 const pkg = require("./package.json");
+const bindir = path.join(__dirname, "bin");
 
 const trim = str => str && String(str).trim();
 
@@ -16,8 +21,29 @@ if (!dhallJsonVersion) throw new Error("Missing DHALL_JSON_VERSION environment v
 
 const release = `https://github.com/dhall-lang/dhall-haskell/releases/download/${dhallVersion}/dhall-json-${dhallJsonVersion}`;
 
-const url = `${release}-x86_64-linux.tar.bz2`;
-https.get(url, res => {
-  if (res.statusCode >= 400) throw new Error(`Error fetching ${url}: ${res.statusMessage}`);
-  res.pipe(unbz2()).pipe(tar.x({ C: __dirname }));
-});
+const get = (archive, callback) => {
+  const url = `${release}-${archive}`;
+  return https.get(url, res => {
+    if (res.statusCode >= 400) throw new Error(`Error fetching ${url}: ${res.statusMessage}`);
+    return callback(res);
+  });
+};
+
+if (process.platform === "win32") {
+  get("x86_64-windows.zip", res =>
+    res.pipe(unzipper.Extract({ path: bindir }))
+  );
+} else {
+  get("x86_64-linux.tar.bz2", res =>
+    res.pipe(unbz2()).pipe(tar.x({ C: __dirname }).on("finish", () => {
+      fs.readdir(bindir, (err, names) => {
+        if (err) throw err;
+        for (const name of names) {
+          fs.rename(path.join(bindir, name), path.join(bindir, name + ".exe"), err => {
+            if (err) throw err;
+          });
+        }
+      });
+    }))
+  );
+}