From 40746f9f9d230558b8a2e7ac5fe42fe88ab8d57e Mon Sep 17 00:00:00 2001
From: Jordan Shatford <jordanshatford@live.com>
Date: Tue, 23 Apr 2024 11:07:12 +1000
Subject: [PATCH] fix: handle cases where no package.json and global deps

---
 .changeset/spotty-panthers-change.md |  5 +++
 .changeset/twenty-turkeys-reply.md   |  5 +++
 packages/openapi-ts/src/index.ts     | 55 ++++++++++++++++++++++------
 3 files changed, 53 insertions(+), 12 deletions(-)
 create mode 100644 .changeset/spotty-panthers-change.md
 create mode 100644 .changeset/twenty-turkeys-reply.md

diff --git a/.changeset/spotty-panthers-change.md b/.changeset/spotty-panthers-change.md
new file mode 100644
index 000000000..43e7e0637
--- /dev/null
+++ b/.changeset/spotty-panthers-change.md
@@ -0,0 +1,5 @@
+---
+"@hey-api/openapi-ts": patch
+---
+
+fix: handle cases where packages are installed globally
diff --git a/.changeset/twenty-turkeys-reply.md b/.changeset/twenty-turkeys-reply.md
new file mode 100644
index 000000000..8d4a3ce47
--- /dev/null
+++ b/.changeset/twenty-turkeys-reply.md
@@ -0,0 +1,5 @@
+---
+"@hey-api/openapi-ts": patch
+---
+
+fix: handle cases where package.json does not exist
diff --git a/packages/openapi-ts/src/index.ts b/packages/openapi-ts/src/index.ts
index c4a538387..3401c297c 100644
--- a/packages/openapi-ts/src/index.ts
+++ b/packages/openapi-ts/src/index.ts
@@ -1,4 +1,4 @@
-import { readFileSync } from 'node:fs';
+import { existsSync, readFileSync } from 'node:fs';
 import path from 'node:path';
 
 import { loadConfig } from 'c12';
@@ -14,6 +14,10 @@ import { postProcessClient } from './utils/postprocess';
 import { writeClient } from './utils/write/client';
 
 type Dependencies = Record<string, unknown>;
+type PackageDependencies = {
+  dependencies?: Dependencies;
+  devDependencies?: Dependencies;
+};
 
 // Dependencies used in each client. User must have installed these to use the generated client
 const clientDependencies: Record<Config['client'], string[]> = {
@@ -184,6 +188,43 @@ const getTypes = (userConfig: UserConfig): Config['types'] => {
   return types;
 };
 
+const getInstalledDependencies = (): Dependencies => {
+  const toReducedDependencies = (p: PackageDependencies): Dependencies =>
+    [p.dependencies ?? {}, p.devDependencies ?? {}].reduce(
+      (deps, devDeps) => ({
+        ...deps,
+        ...devDeps,
+      }),
+      {},
+    );
+
+  let dependencies: Dependencies = {};
+
+  // Attempt to get all globally installed pacakges.
+  const result = sync('npm', ['list', '-g', '--json', '--depth=0']);
+  if (!result.error) {
+    const globally: PackageDependencies = JSON.parse(result.stdout.toString());
+    dependencies = {
+      ...dependencies,
+      ...toReducedDependencies(globally),
+    };
+  }
+
+  // Attempt to read any dependencies installed in a local projects package.json.
+  const pkgPath = path.resolve(process.cwd(), 'package.json');
+  if (existsSync(pkgPath)) {
+    const locally: PackageDependencies = JSON.parse(
+      readFileSync(pkgPath).toString(),
+    );
+    dependencies = {
+      ...dependencies,
+      ...toReducedDependencies(locally),
+    };
+  }
+
+  return dependencies;
+};
+
 const initConfig = async (
   userConfig: UserConfig,
   dependencies: Dependencies,
@@ -269,17 +310,7 @@ const initConfig = async (
  * @param userConfig {@link UserConfig} passed to the `createClient()` method
  */
 export async function createClient(userConfig: UserConfig): Promise<Client> {
-  const pkg = JSON.parse(
-    readFileSync(path.resolve(process.cwd(), 'package.json')).toString(),
-  );
-
-  const dependencies = [pkg.dependencies, pkg.devDependencies].reduce(
-    (res, deps) => ({
-      ...res,
-      ...deps,
-    }),
-    {},
-  );
+  const dependencies = getInstalledDependencies();
 
   if (!dependencies.typescript) {
     throw new Error('🚫 dependency missing - TypeScript must be installed');