refactor directory structure and modularize a few common functions

lib/utils.js

@@ -0,0 +1,92 @@
+import { readPackageUpSync } from "read-pkg-up";
+import { execFileSync } from "child_process";
+
+// This package's version number (should) always match the Hugo release we want.
+export function getPkgVersion() {
+  const { packageJson } = readPackageUpSync();
+  return packageJson.version;
+}
+
+// Generate the full GitHub URL to a given release file.
+export function getReleaseUrl(version, filename) {
+  return `https://github.com/gohugoio/hugo/releases/download/v${version}/${filename}`;
+}
+
+// Binary is named `hugo.exe` on Windows, and simply `hugo` otherwise.
+export function getBinFilename() {
+  return process.platform === "win32" ? "hugo.exe" : "hugo";
+}
+
+// Returns the output of the `hugo version` command, i.e.:
+//   "hugo v0.88.1-5BC54738+extended darwin/arm64 BuildDate=..."
+export function getBinVersion(bin) {
+  const stdout = execFileSync(bin, ["version"]);
+  return stdout.toString();
+}
+
+// Hugo Extended supports: macOS x64, macOS ARM64, Linux x64, Windows x64.
+// all other combos fall back to vanilla Hugo. There are surely much better ways
+// to do this but this is easy to read/update. :)
+export function getReleaseFilename(version) {
+  const { platform, arch } = process;
+
+  const filename =
+    // macOS
+    platform === "darwin" && arch === "x64" ?
+      `hugo_extended_${version}_macOS-64bit.tar.gz` :
+    platform === "darwin" && arch === "arm64" ?
+      `hugo_extended_${version}_macOS-ARM64.tar.gz` :
+
+    // Windows
+    platform === "win32" && arch === "x64" ?
+      `hugo_extended_${version}_Windows-64bit.zip` :
+    platform === "win32" && arch.endsWith("32") ?
+      `hugo_${version}_Windows-32bit.zip` :
+    platform === "win32" && "arm" ?
+      `hugo_${version}_Windows-ARM.zip` :
+
+    // Linux
+    platform === "linux" && arch === "x64" ?
+      `hugo_extended_${version}_Linux-64bit.tar.gz` :
+    platform === "linux" && arch.endsWith("32") ?
+      `hugo_${version}_Linux-32bit.tar.gz` :
+    platform === "linux" && arch === "arm" ?
+      `hugo_${version}_Linux-ARM.tar.gz` :
+    platform === "linux" && arch === "arm64" ?
+      `hugo_${version}_Linux-ARM64.tar.gz` :
+
+    // FreeBSD
+    platform === "freebsd" && arch === "x64" ?
+      `hugo_${version}_FreeBSD-64bit.tar.gz` :
+    platform === "freebsd" && arch.endsWith("32") ?
+      `hugo_${version}_FreeBSD-32bit.tar.gz` :
+    platform === "freebsd" && arch === "arm" ?
+      `hugo_${version}_FreeBSD-ARM.tar.gz` :
+    platform === "freebsd" && arch === "arm64" ?
+      `hugo_${version}_FreeBSD-ARM64.tar.gz` :
+
+    // OpenBSD
+    platform === "openbsd" && arch === "x64" ?
+      `hugo_${version}_OpenBSD-64bit.tar.gz` :
+    platform === "openbsd" && arch.endsWith("32") ?
+      `hugo_${version}_OpenBSD-32bit.tar.gz` :
+    platform === "openbsd" && arch === "arm" ?
+      `hugo_${version}_OpenBSD-ARM.tar.gz` :
+    platform === "openbsd" && arch === "arm64" ?
+      `hugo_${version}_OpenBSD-ARM64.tar.gz` :
+
+    // not gonna work :(
+    null;
+
+  return filename;
+}
+
+// Simple formula for the checksums.txt file.
+export function getChecksumFilename(version) {
+  return `hugo_${version}_checksums.txt`;
+}
+
+// Check if Hugo extended is being downloaded (as opposed to plain Hugo) based on the release filename.
+export function isExtended(releaseFile) {
+  return releaseFile.startsWith("hugo_extended_");
+}