refactor: replace p-limit with inline concurrency limiter

package.json

@@ -112,7 +112,6 @@
     "@types/micromatch": "^3.1.0",
     "@types/node": "18.19.18",
     "@types/node-fetch": "^2.5.12",
-    "@types/p-limit": "^2.0.0",
     "@types/parse-github-url": "^1.0.3",
     "@types/prettier": "^1.16.1",
     "@types/readline-sync": "^1.4.3",
@@ -168,7 +167,6 @@
     "node-cleanup": "^2.1.2",
     "node-fetch": "^2.6.7",
     "override-require": "^1.1.1",
-    "p-limit": "^2.1.0",
     "parse-diff": "^0.7.0",
     "parse-github-url": "^1.0.2",
     "parse-link-header": "^2.0.0",

source/platforms/github/GitHubAPI.ts

@@ -2,8 +2,6 @@ import { Octokit as GitHubNodeAPI } from "@octokit/rest"
 import { debug } from "../../debug"
 import * as node_fetch from "node-fetch"
 import parse from "parse-link-header"
-import pLimit from "p-limit"
-
 import { GitHubPRDSL, GitHubIssueComment, GitHubUser } from "../../dsl/GitHubDSL"
 
 import { dangerIDToString } from "../../runner/templates/githubIssueTemplate"
@@ -15,6 +13,46 @@ import { CheckOptions } from "./comms/checks/resultsToCheck"
 
 export type APIToken = string
 
+/**
+ * Inline concurrency limiter — replaces the `p-limit` package.
+ * Restricts the number of promises running at once to `concurrency`.
+ */
+function pLimit(concurrency: number) {
+  const queue: Array<() => void> = []
+  let active = 0
+
+  const next = () => {
+    if (queue.length > 0 && active < concurrency) {
+      active++
+      queue.shift()!()
+    }
+  }
+
+  return <T>(fn: () => Promise<T>): Promise<T> =>
+    new Promise<T>((resolve, reject) => {
+      const run = () => {
+        Promise.resolve(fn()).then(
+          (val) => {
+            resolve(val)
+            active--
+            next()
+          },
+          (err) => {
+            reject(err)
+            active--
+            next()
+          }
+        )
+      }
+      if (active < concurrency) {
+        active++
+        run()
+      } else {
+        queue.push(run)
+      }
+    })
+}
+
 const limit = pLimit(25)
 
 // Structure of files returned by the 'List pull request files' API

yarn.lock

@@ -1918,13 +1918,6 @@
   resolved "https://registry.yarnpkg.com/@types/node/-/node-16.18.126.tgz#27875faa2926c0f475b39a8bb1e546c0176f8d4b"
   integrity sha512-OTcgaiwfGFBKacvfwuHzzn1KLxH/er8mluiy8/uM3sGXHaRe73RrSIj01jow9t4kJEW633Ov+cOexXeiApTyAw==
 
-"@types/p-limit@^2.0.0":
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/@types/p-limit/-/p-limit-2.2.0.tgz#94a608e9b258a6c6156a13d1a14fd720dba70b97"
-  integrity sha512-fGFbybl1r0oE9mqgfc2EHHUin9ZL5rbQIexWI6jYRU1ADVn4I3LHzT+g/kpPpZsfp8PB94CQ655pfAjNF8LP6A==
-  dependencies:
-    p-limit "*"
-
 "@types/parse-github-url@^1.0.3":
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/@types/parse-github-url/-/parse-github-url-1.0.3.tgz#a097f26ae1993f1963d4031126dc7965707804aa"
@@ -5645,14 +5638,7 @@ p-is-promise@^3.0.0:
   resolved "https://registry.yarnpkg.com/p-is-promise/-/p-is-promise-3.0.0.tgz#58e78c7dfe2e163cf2a04ff869e7c1dba64a5971"
   integrity sha512-Wo8VsW4IRQSKVXsJCn7TomUaVtyfjVDn3nUP7kE967BQk0CwFpdbZs0X0uk5sW9mkBa9eNM7hCMaG93WUAwxYQ==
 
-p-limit@*:
-  version "6.2.0"
-  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-6.2.0.tgz#c254d22ba6aeef441a3564c5e6c2f2da59268a0f"
-  integrity sha512-kuUqqHNUqoIWp/c467RI4X6mmyuojY5jGutNU0wVTmEOOfcuwLqyMVoAi9MKi2Ak+5i9+nhmrK4ufZE8069kHA==
-  dependencies:
-    yocto-queue "^1.1.1"
-
-p-limit@^2.0.0, p-limit@^2.1.0, p-limit@^2.2.0:
+p-limit@^2.0.0, p-limit@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-2.3.0.tgz#3dd33c647a214fdfffd835933eb086da0dc21db1"
   integrity sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==
@@ -7593,11 +7579,6 @@ yocto-queue@^0.1.0:
   resolved "https://registry.yarnpkg.com/yocto-queue/-/yocto-queue-0.1.0.tgz#0294eb3dee05028d31ee1a5fa2c556a6aaf10a1b"
   integrity sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==
 
-yocto-queue@^1.1.1:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/yocto-queue/-/yocto-queue-1.2.0.tgz#4a29a93e7591328fa31768701e6ea66962401f79"
-  integrity sha512-KHBC7z61OJeaMGnF3wqNZj+GGNXOyypZviiKpQeiHirG5Ib1ImwcLBH70rbMSkKfSmUNBsdf2PwaEJtKvgmkNw==
-
 yoctocolors-cjs@^2.1.2:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/yoctocolors-cjs/-/yoctocolors-cjs-2.1.2.tgz#f4b905a840a37506813a7acaa28febe97767a242"