refactor: restructure into true monorepo with turborepo and workspace packages

.github/workflows/ci-pipeline.yaml

@@ -35,7 +35,11 @@ jobs:
         id: cache-check
         uses: actions/cache@v4
         with:
-          path: node_modules
+          path: |
+            node_modules
+            */node_modules
+            packages/*/node_modules
+            apps/*/node_modules
           key: ${{ runner.os }}-node_modules-${{ hashFiles('bun.lock') }}
           lookup-only: true
 
@@ -51,7 +55,11 @@ jobs:
         if: steps.cache-check.outputs.cache-hit != 'true'
         uses: actions/cache/save@v4
         with:
-          path: node_modules
+          path: |
+            node_modules
+            */node_modules
+            packages/*/node_modules
+            apps/*/node_modules
           key: ${{ runner.os }}-node_modules-${{ hashFiles('bun.lock') }}
 
   type-check:
@@ -69,7 +77,11 @@ jobs:
         id: cache-check
         uses: actions/cache@v4
         with:
-          path: node_modules
+          path: |
+            node_modules
+            */node_modules
+            packages/*/node_modules
+            apps/*/node_modules
           key: ${{ runner.os }}-node_modules-${{ hashFiles('bun.lock') }}
           restore-keys: ${{ runner.os }}-node_modules
 
@@ -95,7 +107,11 @@ jobs:
         id: cache-check
         uses: actions/cache@v4
         with:
-          path: node_modules
+          path: |
+            node_modules
+            */node_modules
+            packages/*/node_modules
+            apps/*/node_modules
           key: ${{ runner.os }}-node_modules-${{ hashFiles('bun.lock') }}
           restore-keys: ${{ runner.os }}-node_modules
 

.github/workflows/fly-deploy.yml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Deploy to Fly.io
         run: |
-          flyctl deploy --remote-only --config fly.toml \
+          flyctl deploy --remote-only --config apps/api/fly.toml \
             --build-secret APP_ID="${{ vars.APP_ID }}" \
             --build-secret PRIVATE_KEY="${{ secrets.PRIVATE_KEY }}" \
             --build-secret WEBHOOK_SECRET="${{ secrets.WEBHOOK_SECRET }}" \

.gitignore

@@ -32,3 +32,6 @@ Thumbs.db
 # Misc
 .cache/
 tmp/
+
+# Turborepo
+.turbo/

Dockerfile → apps/api/Dockerfile

@@ -3,11 +3,16 @@ FROM oven/bun:1.3.9-alpine AS build
 WORKDIR /app
 
 COPY package.json bun.lock ./
+COPY apps/api/package.json ./apps/api/
+COPY packages/core/package.json ./packages/core/
+
 RUN bun install --frozen-lockfile --ignore-scripts
 
 COPY tsconfig.json ./
-COPY src/ ./src/
+COPY apps/api/ ./apps/api/
+COPY packages/core/ ./packages/core/
 
+WORKDIR /app/apps/api
 RUN bun build src/server.ts --outfile=dist/server.js --target=bun
 
 FROM oven/bun:1.3.9-alpine
@@ -17,7 +22,7 @@ RUN apk add --no-cache git
 
 WORKDIR /app
 
-COPY --from=build /app/dist/server.js ./server.js
+COPY --from=build /app/apps/api/dist/server.js ./server.js
 
 EXPOSE 8080
 

apps/api/package.json

@@ -0,0 +1,20 @@
+{
+	"name": "api",
+	"private": true,
+	"scripts": {
+		"dev": "bun run --hot src/app/index.ts",
+		"build": "bun build src/app/index.ts --outdir=dist --target=bun",
+		"types:check": "tsc --noEmit --skipLibCheck",
+		"lint:check": "biome check .",
+		"lint:fix": "biome check . --write"
+	},
+	"dependencies": {
+		"@pr-stack/core": "workspace:*",
+		"hono": "^4.11.10",
+		"typescript": "^5.9.3"
+	},
+	"devDependencies": {
+		"@biomejs/biome": "2.4.2",
+		"@types/bun": "latest"
+	}
+}

src/api/index.ts → apps/api/src/app/index.ts

@@ -3,9 +3,6 @@ import ci from "./routes/ci-check";
 import health from "./routes/health";
 import webhook from "./routes/webhook";
 
-// Register webhook handlers
-import "../core/github/handlers/on-pr-merged";
-
 const app = new Hono();
 
 app.route("/ci-check", ci);

src/api/routes/ci-check.ts → apps/api/src/app/routes/ci-check.ts

@@ -1,6 +1,5 @@
+import { ciCheckParamsSchema, shouldSkipCI } from "@pr-stack/core";
 import { type Context, Hono } from "hono";
-import { shouldSkipCI } from "../../core/application/ci-check";
-import { ciCheckParamsSchema } from "../schemas/ci-check.schema";
 
 const ci = new Hono();
 

src/api/routes/webhook.ts → apps/api/src/app/routes/webhook.ts

@@ -1,5 +1,5 @@
+import { githubApp } from "@pr-stack/core";
 import { type Context, Hono } from "hono";
-import { githubApp } from "../../core/github/app";
 
 const webhook = new Hono();
 

src/server.ts → apps/api/src/server.ts

@@ -1,5 +1,5 @@
 import { serve } from "bun";
-import app from "./api/index";
+import app from "./app/index";
 
 serve({
 	fetch: app.fetch,

apps/api/tsconfig.json

@@ -0,0 +1,8 @@
+{
+	"extends": "../../tsconfig.json",
+	"compilerOptions": {
+		"jsx": "react-jsx",
+		"jsxImportSource": "hono/jsx"
+	},
+	"include": ["src"]
+}

package.json

@@ -1,25 +1,27 @@
 {
 	"name": "pr-stack",
 	"license": "MIT",
+	"type": "module",
+	"private": true,
+	"workspaces": [
+		"apps/*",
+		"packages/*"
+	],
 	"scripts": {
-		"dev:api": "bun run --hot src/api/index.ts",
-		"build:api": "bun build src/api/index.ts --outdir=dist --target=bun",
-		"types:check": "tsc --noEmit --skipLibCheck",
-		"lint:check": "biome check .",
-		"lint:fix": "biome check . --write",
+		"dev": "turbo run dev",
+		"dev:api": "turbo run dev --filter=api",
+		"build": "turbo run build",
+		"build:api": "turbo run build --filter=api",
+		"types:check": "turbo run types:check",
+		"lint:check": "turbo run lint:check",
+		"lint:fix": "turbo run lint:fix",
 		"prepare:lefthook": "lefthook install && bun -e \"const fs=require('node:fs'); fs.writeFileSync('node_modules/lefthook/bin/index.js', fs.readFileSync('node_modules/lefthook/bin/index.js', 'utf8').replace(/^#!\\/usr\\/bin\\/env\\s+node/gm, '#!\\/usr\\/bin\\/env bun'))\"",
 		"postinstall": "bun prepare:lefthook"
 	},
-	"dependencies": {
-		"@datastructures-js/deque": "^1.0.8",
-		"hono": "^4.11.10",
-		"octokit": "^5.0.5",
-		"typescript": "^5.9.3",
-		"zod": "^4.3.6"
-	},
 	"devDependencies": {
 		"@biomejs/biome": "2.4.2",
-		"@octokit/webhooks-types": "^7.6.1",
-		"@types/bun": "latest"
-	}
+		"@types/bun": "latest",
+		"turbo": "^2.9.3"
+	},
+	"packageManager": "bun@1.3.9"
 }

packages/core/package.json

@@ -0,0 +1,23 @@
+{
+	"name": "@pr-stack/core",
+	"private": true,
+	"scripts": {
+		"build": "bun build src/index.ts --outdir=dist --target=bun",
+		"types:check": "tsc --noEmit --skipLibCheck",
+		"lint:check": "biome check .",
+		"lint:fix": "biome check . --write"
+	},
+	"dependencies": {
+		"@datastructures-js/deque": "^1.0.8",
+		"@octokit/plugin-retry": "^8.0.3",
+		"hono": "^4.11.10",
+		"octokit": "^5.0.5",
+		"typescript": "^5.9.3",
+		"zod": "^4.3.6"
+	},
+	"devDependencies": {
+		"@biomejs/biome": "2.4.2",
+		"@octokit/webhooks-types": "^7.6.1",
+		"@types/bun": "latest"
+	}
+}

src/core/application/ci-check.ts → packages/core/src/application/ci-check.ts

@@ -1,6 +1,6 @@
 import { $ } from "bun";
-import type { CiCheckParams } from "../../api/schemas/ci-check.schema";
 import { getInstallationArtifacts } from "../github/auth";
+import type { CiCheckParams } from "../schemas/ci-check.schema";
 import { GitService } from "../services/git.service";
 import { OctokitService } from "../services/octokit.service";
 

src/core/application/rebase.ts → packages/core/src/application/rebase.ts

@@ -1,14 +1,11 @@
 import { Deque } from "@datastructures-js/deque";
 import { $ } from "bun";
 import type { Octokit } from "octokit";
-import type {
-	PullRequestData,
-	RepositoryData,
-} from "../../api/schemas/shared.schema";
 import { getInstallationArtifacts } from "../github/auth";
 import type { PullRequest } from "../models/pull-request.model";
+import type { PullRequestData, RepositoryData } from "../schemas/shared.schema";
 import { GitService } from "../services/git.service";
-import { OctokitService } from "./../services/octokit.service";
+import { OctokitService } from "../services/octokit.service";
 
 const REBASE_OPT_IN_LABEL = "pr-stack:auto-rebase";
 

packages/core/src/index.ts

@@ -0,0 +1,8 @@
+// Register side-effect handlers
+import "./github/handlers/on-pr-merged";
+
+export * from "./application/ci-check";
+export * from "./application/rebase";
+export * from "./github/app";
+export * from "./schemas/ci-check.schema";
+export * from "./schemas/shared.schema";

packages/core/tsconfig.json

@@ -0,0 +1,4 @@
+{
+	"extends": "../../tsconfig.json",
+	"include": ["src"]
+}

tsconfig.json

@@ -5,8 +5,6 @@
 		"target": "ESNext",
 		"module": "Preserve",
 		"moduleDetection": "force",
-		"jsx": "react-jsx",
-		"jsxImportSource": "hono/jsx",
 		"allowJs": true,
 		"types": ["bun"],
 
@@ -26,6 +24,11 @@
 		// Some stricter flags (disabled by default)
 		"noUnusedLocals": false,
 		"noUnusedParameters": false,
-		"noPropertyAccessFromIndexSignature": false
+		"noPropertyAccessFromIndexSignature": false,
+
+		// Monorepo aliases
+		"paths": {
+			"@pr-stack/core": ["./packages/core/src"]
+		}
 	}
 }

turbo.json

@@ -0,0 +1,18 @@
+{
+	"$schema": "https://turborepo.dev/schema.json",
+	"tasks": {
+		"build": {
+			"outputs": ["dist/**"]
+		},
+		"dev": {
+			"persistent": true,
+			"cache": false
+		},
+		"types:check": {
+			"dependsOn": ["^types:check"]
+		},
+		"lint:check": {},
+		"lint:fix": {}
+	},
+	"ui": "tui"
+}