5 files changed, 190 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ed4598e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+node_modules
+bin
diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..29a5d41
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+ignore-scripts = true
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..1d1085f
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,129 @@
+{
+  "name": "dhall-json",
+  "version": "1.0.0",
+  "lockfileVersion": 1,
+  "requires": true,
+  "dependencies": {
+    "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=="
+    },
+    "buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/buffer/-/buffer-5.2.1.tgz",
+      "integrity": "sha512-c+Ko0loDaFfuPWiL02ls9Xd3GO3cPVmUobQ6t3rXNUk304u6hGq+8N/kFi+QEIKhzK3uwolVhLzszmfLmMLnqg==",
+      "requires": {
+        "base64-js": "^1.0.2",
+        "ieee754": "^1.1.4"
+      }
+    },
+    "chownr": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/chownr/-/chownr-1.1.1.tgz",
+      "integrity": "sha512-j38EvO5+LHX84jlo6h4UzmOwi0UgW61WRyPtJz4qaadK5eY3BTS5TY/S1Stc3Uk2lIM6TPevAlULiEJwie860g=="
+    },
+    "debug": {
+      "version": "3.2.6",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-3.2.6.tgz",
+      "integrity": "sha512-mel+jf7nrtEl5Pn1Qx46zARXKDpBbvzezse7p7LqINmdoIk8PYP5SySaxEmYv6TZ0JyEKA1hsCId6DIhgITtWQ==",
+      "requires": {
+        "ms": "^2.1.1"
+      }
+    },
+    "follow-redirects": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.7.0.tgz",
+      "integrity": "sha512-m/pZQy4Gj287eNy94nivy5wchN3Kp+Q5WgUPNy5lJSZ3sgkVKSYV/ZChMAQVIgx1SqfZ2zBZtPA2YlXIWxxJOQ==",
+      "requires": {
+        "debug": "^3.2.6"
+      }
+    },
+    "fs-minipass": {
+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/fs-minipass/-/fs-minipass-1.2.6.tgz",
+      "integrity": "sha512-crhvyXcMejjv3Z5d2Fa9sf5xLYVCF5O1c71QxbVnbLsmYMBEvDAftewesN/HhY03YRoA7zOMxjNGrF5svGaaeQ==",
+      "requires": {
+        "minipass": "^2.2.1"
+      }
+    },
+    "ieee754": {
+      "version": "1.1.13",
+      "resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.1.13.tgz",
+      "integrity": "sha512-4vf7I2LYV/HaWerSo3XmlMkp5eZ83i+/CDluXi/IGTs/O1sejBNhTtnxzmRZfvOUqj7lZjqHkeTvpgSFDlWZTg=="
+    },
+    "minimist": {
+      "version": "0.0.8",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-0.0.8.tgz",
+      "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+    },
+    "minipass": {
+      "version": "2.3.5",
+      "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.3.5.tgz",
+      "integrity": "sha512-Gi1W4k059gyRbyVUZQ4mEqLm0YIUiGYfvxhF6SIlk3ui1WVxMTGfGdQ2SInh3PDrRTVvPKgULkpJtT4RH10+VA==",
+      "requires": {
+        "safe-buffer": "^5.1.2",
+        "yallist": "^3.0.0"
+      }
+    },
+    "minizlib": {
+      "version": "1.2.1",
+      "resolved": "https://registry.npmjs.org/minizlib/-/minizlib-1.2.1.tgz",
+      "integrity": "sha512-7+4oTUOWKg7AuL3vloEWekXY2/D20cevzsrNT2kGWm+39J9hGTCBv8VI5Pm5lXZ/o3/mdR4f8rflAPhnQb8mPA==",
+      "requires": {
+        "minipass": "^2.2.1"
+      }
+    },
+    "mkdirp": {
+      "version": "0.5.1",
+      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.1.tgz",
+      "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+      "requires": {
+        "minimist": "0.0.8"
+      }
+    },
+    "ms": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.1.tgz",
+      "integrity": "sha512-tgp+dl5cGk28utYktBsrFqA7HKgrhgPsg6Z/EfhWI4gl1Hwq8B/GmY/0oXZ6nF8hDVesS/FpnYaD/kOWhYQvyg=="
+    },
+    "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=="
+    },
+    "tar": {
+      "version": "4.4.8",
+      "resolved": "https://registry.npmjs.org/tar/-/tar-4.4.8.tgz",
+      "integrity": "sha512-LzHF64s5chPQQS0IYBn9IN5h3i98c12bo4NCO7e0sGM2llXQ3p2FGC5sdENN4cTW48O915Sh+x+EXx7XW96xYQ==",
+      "requires": {
+        "chownr": "^1.1.1",
+        "fs-minipass": "^1.2.5",
+        "minipass": "^2.3.4",
+        "minizlib": "^1.1.1",
+        "mkdirp": "^0.5.0",
+        "safe-buffer": "^5.1.2",
+        "yallist": "^3.0.2"
+      }
+    },
+    "through": {
+      "version": "2.3.8",
+      "resolved": "https://registry.npmjs.org/through/-/through-2.3.8.tgz",
+      "integrity": "sha1-DdTJ/6q8NXlgsbckEV1+Doai4fU="
+    },
+    "unbzip2-stream": {
+      "version": "1.3.3",
+      "resolved": "https://registry.npmjs.org/unbzip2-stream/-/unbzip2-stream-1.3.3.tgz",
+      "integrity": "sha512-fUlAF7U9Ah1Q6EieQ4x4zLNejrRvDWUYmxXUpN3uziFYCHapjWFaCAnreY9bGgxzaMCFAPPpYNng57CypwJVhg==",
+      "requires": {
+        "buffer": "^5.2.1",
+        "through": "^2.3.8"
+      }
+    },
+    "yallist": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
+      "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+    }
+  }
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..c9f735e
--- /dev/null
+++ b/package.json
@@ -0,0 +1,35 @@
+{
+  "name": "dhall-json",
+  "version": "1.0.0",
+  "description": "NPM package for `dhall-json`, based on https://github.com/justinwoo/npm-psc-package-bin-simple.",
+  "os": [
+    "linux"
+  ],
+  "cpu": [
+    "x64"
+  ],
+  "files": [
+    "preinstall.js"
+  ],
+  "bin": {
+    "dhall-to-json": "bin/dhall-to-json",
+    "dhall-to-yaml": "bin/dhall-to-yaml"
+  },
+  "scripts": {
+    "preinstall": "node ./preinstall.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/cyrilfretlink/node-dhall-json.git"
+  },
+  "author": "FretLink",
+  "bugs": {
+    "url": "https://github.com/cyrilfretlink/node-dhall-json/issues"
+  },
+  "homepage": "https://github.com/cyrilfretlink/node-dhall-json#readme",
+  "dependencies": {
+    "follow-redirects": "^1.7.0",
+    "tar": "^4.4.8",
+    "unbzip2-stream": "^1.3.3"
+  }
+}
diff --git a/preinstall.js b/preinstall.js
new file mode 100644
index 0000000..1b859fc
--- /dev/null
+++ b/preinstall.js
@@ -0,0 +1,23 @@
+"use strict";
+
+const { https } = require("follow-redirects");
+const tar = require("tar");
+const unbz2 = require("unbzip2-stream");
+
+const pkg = require("./package.json");
+
+const trim = str => str && String(str).trim();
+
+const dhallVersion = trim(pkg["dhall-version"] || process.env.DHALL_VERSION);
+if (!dhallVersion) throw new Error("Missing DHALL_VERSION environment variable.");
+
+const dhallJsonVersion = trim(pkg["dhall-json-version"] || process.env.DHALL_JSON_VERSION);
+if (!dhallJsonVersion) throw new Error("Missing DHALL_JSON_VERSION environment variable.");
+
+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 }));
+});