From 81b55caa8533ad174ec009535e5a030be21e6cc1 Mon Sep 17 00:00:00 2001
From: Lexus Drumgold <unicornware@flexdevelopment.llc>
Date: Wed, 22 Feb 2023 06:30:22 -0500
Subject: [PATCH] fix(ts): ensure typechecks pass without peer deps installed
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- @ts-* comments are meaningful comments, but typescript does not preserve them 🙃🙄
- re-implemented flex-development/mlly@779cddf91f6d4e0e04ecebab0e0c6942aeaa9286 as build plugin
- microsoft/TypeScript#38628
- https://github.com/microsoft/TypeScript/issues/38628#issuecomment-1439749496

Signed-off-by: Lexus Drumgold <unicornware@flexdevelopment.llc>
---
 build.config.ts                      | 36 +++++++++++++++++++++++++++-
 src/interfaces/options-get-format.ts |  1 -
 src/interfaces/options-get-source.ts |  1 -
 3 files changed, 35 insertions(+), 3 deletions(-)

diff --git a/build.config.ts b/build.config.ts
index cf6fcf80..53b5c15f 100644
--- a/build.config.ts
+++ b/build.config.ts
@@ -4,6 +4,7 @@
  */
 
 import { defineBuildConfig, type Config } from '@flex-development/mkbuild'
+import type { BuildResult, PluginBuild } from 'esbuild'
 import pkg from './package.json' assert { type: 'json' }
 
 /**
@@ -13,7 +14,40 @@ import pkg from './package.json' assert { type: 'json' }
  */
 const config: Config = defineBuildConfig({
   entries: [
-    { dts: 'only' },
+    {
+      dts: 'only',
+      plugins: [
+        {
+          name: 'ts-ignore-peers',
+          setup({ onEnd }: PluginBuild): void {
+            return void onEnd((result: BuildResult<{ write: false }>): void => {
+              const { outputFiles } = result
+
+              /**
+               * Regular expression used to insert `// @ts-ignore` above
+               * property declarations.
+               *
+               * @const {RegExp} regex
+               */
+              const regex: RegExp = /\n( +)(.+?\??: )(import\('node-fetch'\).+)/
+
+              /**
+               * Property declaration with `// @ts-ignore` prepended.
+               *
+               * @const {string} replacement
+               */
+              const replacement: string =
+                '\n$1// @ts-ignore peer dependency\n$1$2$3'
+
+              return void (result.outputFiles = outputFiles.map(output => ({
+                ...output,
+                text: output.text.replace(regex, replacement)
+              })))
+            })
+          }
+        }
+      ]
+    },
     {
       dts: false,
       pattern: ['**/index.ts', 'enums/*', 'internal/*', 'utils/*'],
diff --git a/src/interfaces/options-get-format.ts b/src/interfaces/options-get-format.ts
index a3b70478..7796f34c 100644
--- a/src/interfaces/options-get-format.ts
+++ b/src/interfaces/options-get-format.ts
@@ -74,7 +74,6 @@ interface GetFormatOptions {
    *
    * @default {}
    */
-  // @ts-ignore peer dependency
   req?: import('node-fetch').RequestInit | undefined
 }
 
diff --git a/src/interfaces/options-get-source.ts b/src/interfaces/options-get-source.ts
index a1da80d2..a57ef4a8 100644
--- a/src/interfaces/options-get-source.ts
+++ b/src/interfaces/options-get-source.ts
@@ -52,7 +52,6 @@ interface GetSourceOptions {
    *
    * @default {}
    */
-  // @ts-ignore peer dependency
   req?: import('node-fetch').RequestInit | undefined
 }