feat: add npm install

.gitignore

@@ -15,7 +15,6 @@
 # vendor/
 
 .idea
-bin
 dist
 coverage.out
 release.md

npm/.gitignore

@@ -0,0 +1,4 @@
+bin/whatchanged
+bin/whatchanged.exe
+*-lock.json
+*.lock

npm/.npmignore

@@ -0,0 +1,4 @@
+node_modules
+*.lock
+package-lock.json
+dist

npm/bin/whatchanged.js

@@ -0,0 +1 @@
+throw new Error("what changed command line did not install correctly");

npm/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "whatchanged",
+  "version": "0.2.2",
+  "description": "An elegant changelog generator",
+  "bin": "./bin/whatchanged",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "postinstall": "node scripts/postinstall.js"
+  },
+  "author": "Axetroy",
+  "license": "ISC",
+  "dependencies": {
+    "download": "^8.0.0",
+    "progress": "^2.0.3"
+  }
+}

npm/scripts/postinstall.js

@@ -0,0 +1,68 @@
+const path = require("path");
+const os = require("os");
+const download = require("download");
+const ProgressBar = require("progress");
+
+const pkg = require("../package.json");
+
+function getArch() {
+  const arch = os.arch();
+  switch (arch) {
+    case "ia32":
+    case "x32":
+      return "386";
+    case "x64":
+      return "amd64";
+    case "arm":
+      // @ts-expect-error ignore error
+      const armv = process.config.variables.arm_version;
+
+      if (!armv) return "armv7";
+
+      return `armv${armv}`;
+    default:
+      return arch;
+  }
+}
+
+function getPlatform() {
+  const platform = os.platform();
+  switch (platform) {
+    case "win32":
+      return "windows";
+    default:
+      return platform;
+  }
+}
+
+function getDownloadURL(version) {
+  const url = `https://github.com/axetroy/whatchanged/releases/download/${version}/whatchanged_${getPlatform()}_${getArch()}.tar.gz`;
+  return url;
+}
+
+async function install(version) {
+  const url = getDownloadURL(version);
+
+  console.log(`Downloading '${url}'`);
+
+  const bar = new ProgressBar("[:bar] :percent :etas", {
+    complete: "=",
+    incomplete: " ",
+    width: 20,
+    total: 0,
+  });
+
+  await download(url, path.join(__dirname, "..", "bin"), {
+    extract: true,
+  }).on("response", (res) => {
+    bar.total = res.headers["content-length"];
+    res.on("data", (data) => bar.tick(data.length));
+    res.on("error", (err) => {
+      console.error("error");
+    });
+  });
+}
+
+install("v" + pkg.version).catch((err) => {
+  throw err;
+});