Initial Commit

packages/devtools/tooling/javy-cli-linux-arm64/src/index.ts

@@ -0,0 +1,37 @@
+import { existsSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+/**
+ * Absolute filesystem path to the bundled Javy binary for this
+ * platform. `@suaveplan/wasm-compiler-javy` calls this to locate the
+ * binary it spawns via `child_process.spawnSync` — the postinstall
+ * script places the binary at this exact path after verifying its
+ * SHA-256.
+ *
+ * Throws if the binary is missing (the postinstall step failed or was
+ * skipped via `JAVY_SKIP_DOWNLOAD=1` without a follow-up seed). The
+ * caller is expected to surface this as a structured error.
+ */
+export function getJavyBinary(): string {
+    const here = dirname(fileURLToPath(import.meta.url));
+    // dist/index.js → ../bin/<name>
+    const candidate = join(here, "..", "bin", "javy");
+    if (!existsSync(candidate)) {
+        // src/index.ts → ../bin/<name> (when running from src under bun)
+        const fallback = join(here, "..", "bin", "javy");
+        if (existsSync(fallback)) return fallback;
+        throw new Error(
+            "@suaveplan/javy-cli-linux-arm64: binary not found at " +
+                candidate +
+                " — did postinstall run? (set JAVY_SKIP_DOWNLOAD=1 only with a manual seed)"
+        );
+    }
+    return candidate;
+}
+
+/** Platform triple this wrapper serves. */
+export const JAVY_PLATFORM = "linux-arm64" as const;
+
+/** Pinned Javy upstream version this wrapper installs. */
+export const JAVY_VERSION = "v8.1.1" as const;