fix: follow symlinked bin entrypoints

CHANGELOG.md

@@ -97,6 +97,12 @@
   `lastDurableSetupAt` while keeping legacy `lastSuccessfulSetupAt` readable as
   a backward-compatible migration path
 
+### Bug Fixes
+
+- make the published bin wrapper follow symlinked `.bin` entrypoints so
+  `npx @gonkagate/opencode-setup` and `node_modules/.bin/opencode-setup`
+  actually execute on Unix-like systems instead of exiting silently
+
 ### Added
 
 - public curated model picker UI in the CLI, currently backed by one validated

bin/gonkagate-opencode.js

@@ -1,14 +1,12 @@
 #!/usr/bin/env node
 
 import process from "node:process";
-import { pathToFileURL } from "node:url";
 import { main, renderCliEntrypointError } from "../dist/cli.js";
+import { isEntrypointInvocation } from "../dist/entrypoint.js";
 
 export { renderCliEntrypointError };
 
-const isEntrypoint =
-  process.argv[1] !== undefined &&
-  import.meta.url === pathToFileURL(process.argv[1]).href;
+const isEntrypoint = isEntrypointInvocation(import.meta.url);
 
 function handleCliError(error) {
   const renderedError = renderCliEntrypointError(error);

src/cli.ts

@@ -1,9 +1,9 @@
 import process from "node:process";
-import { pathToFileURL } from "node:url";
 import { run as runCli } from "./cli/execute.js";
 import { parseCliOptions } from "./cli/parse.js";
 import { renderCliEntrypointError } from "./cli/render.js";
 import type { CliRunOptions, CliRunResult } from "./cli/contracts.js";
+import { isEntrypointInvocation } from "./entrypoint.js";
 
 export { parseCliOptions };
 export { renderCliEntrypointError } from "./cli/render.js";
@@ -45,9 +45,7 @@ function handleCliError(error: unknown): void {
   process.exitCode = renderedError.exitCode;
 }
 
-const isEntrypoint =
-  process.argv[1] !== undefined &&
-  import.meta.url === pathToFileURL(process.argv[1]).href;
+const isEntrypoint = isEntrypointInvocation(import.meta.url);
 
 if (isEntrypoint) {
   main().catch(handleCliError);

src/entrypoint.ts

@@ -0,0 +1,29 @@
+import { realpathSync } from "node:fs";
+import { fileURLToPath, pathToFileURL } from "node:url";
+
+function tryResolveRealPath(path: string): string | undefined {
+  try {
+    return realpathSync(path);
+  } catch {
+    return undefined;
+  }
+}
+
+export function isEntrypointInvocation(
+  importMetaUrl: string,
+  argv1 = process.argv[1],
+): boolean {
+  if (argv1 === undefined) {
+    return false;
+  }
+
+  const importMetaPath = fileURLToPath(importMetaUrl);
+  const argv1RealPath = tryResolveRealPath(argv1);
+  const importMetaRealPath = tryResolveRealPath(importMetaPath);
+
+  if (argv1RealPath !== undefined && importMetaRealPath !== undefined) {
+    return argv1RealPath === importMetaRealPath;
+  }
+
+  return importMetaUrl === pathToFileURL(argv1).href;
+}

test/cli.test.ts

@@ -1,6 +1,8 @@
 import assert from "node:assert/strict";
 import { spawnSync } from "node:child_process";
-import { resolve } from "node:path";
+import { mkdtempSync, rmSync, symlinkSync } from "node:fs";
+import { join, resolve } from "node:path";
+import { tmpdir } from "node:os";
 import { pathToFileURL } from "node:url";
 import test from "node:test";
 import { formatOpencodeModelRef } from "../src/constants/models.js";
@@ -161,6 +163,40 @@ test("CLI wrapper exposes the shipped help surface", () => {
   assert.match(helpResult.stdout, new RegExp(escapeRegExp(GONKAGATE_BASE_URL)));
 });
 
+test("CLI wrapper still runs when invoked through a symlinked bin path", (t) => {
+  const tempDir = mkdtempSync(join(tmpdir(), "gonkagate-opencode-bin-"));
+  const binPath = resolve(repoRoot, CONTRACT_METADATA.binPath);
+  const linkedBinPath = resolve(tempDir, CONTRACT_METADATA.binName);
+
+  t.after(() => {
+    rmSync(tempDir, { force: true, recursive: true });
+  });
+
+  try {
+    symlinkSync(binPath, linkedBinPath, "file");
+  } catch (error) {
+    if (
+      error instanceof Error &&
+      "code" in error &&
+      (error as NodeJS.ErrnoException).code === "EPERM"
+    ) {
+      t.skip("Symlinks are unavailable in this environment.");
+      return;
+    }
+
+    throw error;
+  }
+
+  const helpResult = spawnSync(process.execPath, [linkedBinPath, "--help"], {
+    cwd: repoRoot,
+    encoding: "utf8",
+  });
+
+  assert.equal(helpResult.status, 0);
+  assert.match(helpResult.stdout, /Usage: opencode-setup/i);
+  assert.match(helpResult.stdout, /Configure OpenCode to use GonkaGate/i);
+});
+
 test("interactive runs show the public model picker even when one validated model is available", async () => {
   const promptMessages: string[] = [];
   const promptChoiceSnapshots: string[][] = [];