chore: replace tsc with tsdown.

.github/workflows/bench.yml

@@ -74,95 +74,52 @@ jobs:
       - name: Run benchmarks
         id: bench
         run: |
-          # Run the benchmark command and capture its exit code
-          pnpm bench:ts > /tmp/benchmark_output.txt 2>&1
+          # Run benchmarks and capture output
+          pnpm bench:ts > /tmp/bench_output.txt 2>&1
           exit_code=$?
 
-          # Process the output
-          summary_output=$(cat /tmp/benchmark_output.txt | grep -v "> " | sed '/./,$!d')
+          # Extract summary (everything from "⏱️" to end of file)
+          summary=$(grep -A999 "⏱️" /tmp/bench_output.txt || echo "✅ ⏱️  No benchmark changes detected.")
 
-          # Set a boolean output indicating if it failed with exit code 1
-          if [ $exit_code -eq 1 ]; then
-            echo "benchmark_failed=true" >> $GITHUB_OUTPUT
+          # Check if there are benchmark changes
+          if echo "$summary" | grep -q "No benchmark changes detected"; then
+            has_changes="false"
           else
-            echo "benchmark_failed=false" >> $GITHUB_OUTPUT
+            has_changes="true"
           fi
 
-          echo "full_summary<<EOF" >> $GITHUB_OUTPUT
-          echo "$summary_output" >> $GITHUB_OUTPUT
+          # Set outputs
+          echo "benchmark_failed=$([ $exit_code -eq 0 ] && echo 'false' || echo 'true')" >> $GITHUB_OUTPUT
+          echo "has_changes=$has_changes" >> $GITHUB_OUTPUT
+          echo "summary<<EOF" >> $GITHUB_OUTPUT
+          echo "$summary" >> $GITHUB_OUTPUT
           echo "EOF" >> $GITHUB_OUTPUT
 
-      - name: Analyze Results
-        id: analyze
-        run: |
-          full_summary="${{ steps.bench.outputs.full_summary }}"
-
-          # This powerful awk script performs two actions:
-          # 1. It finds blocks missing a Delta line and calculates it.
-          # 2. It filters for all blocks where the final delta is not zero.
-          changed_blocks=$(echo "$full_summary" | awk '
-          BEGIN { RS="" } # Process the input in blocks separated by blank lines
-          {
-            block_text = $0 # Store the original block text
-            is_changed = 0
-
-            # If a block is missing a Delta line, calculate it
-            if ($0 ~ /Baseline:/ && $0 !~ /Delta:/) {
-              # Extract numeric values for Result and Baseline
-              match($0, /Result: ([0-9.]+)/, r)
-              match($0, /Baseline: ([0-9.]+)/, b)
-
-              result_val = r[1]
-              baseline_val = b[1]
-
-              # Calculate the delta, avoiding division by zero
-              if (baseline_val > 0) {
-                delta = ((result_val / baseline_val) - 1) * 100
-                # Append the newly calculated, formatted Delta line to the block
-                block_text = sprintf("%s\n📊 Delta: %+.2f%%", block_text, delta)
-              }
-            }
-
-            # Now, check the (potentially modified) block for a non-zero delta.
-            # This works for both pre-existing deltas and the ones we just calculated.
-            if (block_text ~ /Delta:/ && block_text !~ /Delta: (\+)?0\.00%/) {
-              # Filter out any summary lines that are not part of a benchmark block
-              if (block_text ~ /🏌️/) {
-                print block_text "\n" # Print the complete, changed block
-              }
-            }
-          }')
-
-          if [ -n "$changed_blocks" ]; then
-            echo "has_changes=true" >> $GITHUB_OUTPUT
-            echo "changed_blocks<<EOF" >> $GITHUB_OUTPUT
-            echo "$changed_blocks" >> $GITHUB_OUTPUT
-            echo "EOF" >> $GITHUB_OUTPUT
-          else
-            echo "has_changes=false" >> $GITHUB_OUTPUT
-          fi
-
-      - name: PR Comment on Changes
-        if: steps.analyze.outputs.has_changes == 'true' && github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false
+      - name: Post benchmark results (with changes)
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false && steps.bench.outputs.has_changes == 'true'
         uses: thollander/actions-comment-pull-request@24bffb9b452ba05a4f3f77933840a6a841d1b32b # v3.0.1
         with:
           comment-tag: typescript-benchmarks
           message: |
             <details>
-            <summary>⏱️ <strong>Benchmark changes detected</strong> following ${{ github.event.pull_request.head.sha }}</summary>
+            <summary>⏱️ <strong>TypeScript Benchmark Results</strong></summary>
 
-            The following benchmarks have changed from the baseline:
             ```
-            ${{ steps.analyze.outputs.changed_blocks }}
+            ${{ steps.bench.outputs.summary }}
             ```
             </details>
 
-      - name: PR Comment on No Changes
-        if: steps.analyze.outputs.has_changes == 'false' && github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false
+      - name: Post benchmark results (no changes)
+        if: github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork == false && steps.bench.outputs.has_changes == 'false'
         uses: thollander/actions-comment-pull-request@24bffb9b452ba05a4f3f77933840a6a841d1b32b # v3.0.1
         with:
           comment-tag: typescript-benchmarks
-          message: ✅ ⏱️ **No benchmark changes detected** following ${{ github.event.pull_request.head.sha }}.
+          message: |
+            ⏱️ **TypeScript Benchmark Results**
+
+            ```
+            ${{ steps.bench.outputs.summary }}
+            ```
 
       - name: Fail job if benchmark command failed
         if: steps.bench.outputs.benchmark_failed == 'true'

.github/workflows/test.yml

@@ -235,9 +235,6 @@ jobs:
       fail-fast: false
       matrix:
         typescript-version: [
-            ~4.6.0, # 28.2.2022 https://devblogs.microsoft.com/typescript/announcing-typescript-4-6/
-            ~4.7.0, # 24.5.2022 https://devblogs.microsoft.com/typescript/announcing-typescript-4-7/
-            ~4.8.0, # 25.8.2022 https://devblogs.microsoft.com/typescript/announcing-typescript-4-8/
             ~4.9.0, # 15.11.2022 https://devblogs.microsoft.com/typescript/announcing-typescript-4-9/
             ~5.0.0, # 16.3.2023 https://devblogs.microsoft.com/typescript/announcing-typescript-5-0/
             ~5.2.0, # 24.8.2023 https://devblogs.microsoft.com/typescript/announcing-typescript-5-1/ https://devblogs.microsoft.com/typescript/announcing-typescript-5-2/
@@ -274,7 +271,7 @@ jobs:
         run: |
           TS_VERSION="${{ matrix.typescript-version }}"
           echo "TS_VERSION=$TS_VERSION" >> $GITHUB_ENV
-          TSD_VERSION=$(echo '{"~4.6.0":"0.20.0", "~4.7.0":"0.22.0", "~4.8.0":"0.24.1", "~4.9.0":"0.27.0", "~5.0.0":"0.28.1", "~5.2.0":"0.29.0", "~5.3.0":"0.30.7", "~5.4.0":"0.31.2", "~5.8.0":"0.32.0", "~5.9.0":"0.33.0"}' | jq -r --arg key "$TS_VERSION" '.[$key]')
+          TSD_VERSION=$(echo '{"~4.9.0":"0.27.0", "~5.0.0":"0.28.1", "~5.2.0":"0.29.0", "~5.3.0":"0.30.7", "~5.4.0":"0.31.2", "~5.8.0":"0.32.0", "~5.9.0":"0.33.0"}' | jq -r --arg key "$TS_VERSION" '.[$key]')
           echo "TSD_VERSION=$TSD_VERSION" >> $GITHUB_ENV
 
       - name: Install Typescript (${{ env.TS_VERSION }}) and TSD (${{ env.TSD_VERSION }})
@@ -284,7 +281,7 @@ jobs:
         run: pnpm script:exclude-test-files-for-backwards-compat
 
       - name: Run tests with older TypeScript version
-        run: pnpm test:typings${{ env.TS_VERSION != '~4.6.0' && env.TS_VERSION != '~4.7.0' && ' && pnpm test:node:build' || '' }}
+        run: pnpm test:typings && pnpm test:node:build
 
   jsdocs:
     name: JSDocs

.gitignore

@@ -1,5 +1,6 @@
 dist
 /helpers
+migration.*
 /test/browser/bundle.js
 node_modules
 .vscode

README.md

@@ -15,10 +15,11 @@
 [![Bluesky](https://img.shields.io/badge/Bluesky-0285FF?style=flat&logo=Bluesky&logoColor=white)](https://bsky.app/profile/kysely.dev)
 
 ###### Get started
-[![Postgres](https://img.shields.io/badge/postgres-%23316192.svg?style=flat&logo=postgresql&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=postgresql)
-[![MySQL](https://img.shields.io/badge/mysql-4479A1.svg?style=flat&logo=mysql&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=mysql)
-[![MicrosoftSQLServer](https://img.shields.io/badge/Microsoft%20SQL%20Server-CC2927?style=flat&logo=microsoft%20sql%20server&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=mssql)
-[![SQLite](https://img.shields.io/badge/sqlite-%2307405e.svg?style=flat&logo=sqlite&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=sqlite)
+[![PostgreSQL](https://img.shields.io/badge/PostgreSQL-%23316192.svg?style=flat&logo=postgresql&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=postgresql)
+[![MySQL](https://img.shields.io/badge/MySQL-4479A1.svg?style=flat&logo=mysql&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=mysql)
+[![MSSQL](https://img.shields.io/badge/MSSQL-CC2927?style=flat&logo=microsoft%20sql%20server&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=mssql)
+[![SQLite](https://img.shields.io/badge/SQLite-%2307405e.svg?style=flat&logo=sqlite&logoColor=white)](https://kysely.dev/docs/getting-started?dialect=sqlite)
+[![PGlite](https://img.shields.io/badge/PGlite-131517.svg?style=flat&logo=data:image/svg%2bxml;base64,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)](https://kysely.dev/docs/getting-started?dialect=pglite)
 & more!
 
 # [Kysely](https://kysely.dev)

deno.check.json

@@ -4,12 +4,14 @@
     "types": ["./deno.check.d.ts"]
   },
   "imports": {
+    "@electric-sql/pglite": "npm:@electric-sql/pglite",
     "better-sqlite3": "npm:better-sqlite3",
     "kysely": "./dist/esm",
     "kysely/helpers/mssql": "./dist/esm/helpers/mssql.js",
     "kysely/helpers/mysql": "./dist/esm/helpers/mysql.js",
     "kysely/helpers/postgres": "./dist/esm/helpers/postgres.js",
     "kysely/helpers/sqlite": "./dist/esm/helpers/sqlite.js",
+    "kysely/migration": "./dist/esm/migration",
     "lodash/snakeCase": "npm:lodash/snakeCase",
     "mysql2": "npm:mysql2",
     "pg": "npm:pg",

jsr.json

@@ -8,7 +8,8 @@
     "./helpers/mysql": "./src/helpers/mysql.ts",
     "./helpers/mssql": "./src/helpers/mssql.ts",
     "./helpers/postgres": "./src/helpers/postgres.ts",
-    "./helpers/sqlite": "./src/helpers/sqlite.ts"
+    "./helpers/sqlite": "./src/helpers/sqlite.ts",
+    "./migration": "./src/migration/index.ts"
   },
   "publish": {
     "include": [

outdated-typescript.d.ts

@@ -1,5 +1,5 @@
-import type { KyselyTypeError } from './dist/cjs/util/type-error'
+import type { KyselyTypeError } from './dist/index.js'
 
-declare const Kysely: KyselyTypeError<'The installed TypeScript version is outdated and cannot guarantee type-safety with Kysely. Please upgrade to version 4.6 or newer.'>
-declare const RawBuilder: KyselyTypeError<'The installed TypeScript version is outdated and cannot guarantee type-safety with Kysely. Please upgrade to version 4.6 or newer.'>
-declare const sql: KyselyTypeError<'The installed TypeScript version is outdated and cannot guarantee type-safety with Kysely. Please upgrade to version 4.6 or newer.'>
+declare const Kysely: KyselyTypeError<'The installed TypeScript version is outdated and cannot guarantee type-safety with Kysely. Please upgrade to version 4.9 or newer.'>
+declare const RawBuilder: KyselyTypeError<'The installed TypeScript version is outdated and cannot guarantee type-safety with Kysely. Please upgrade to version 4.9 or newer.'>
+declare const sql: KyselyTypeError<'The installed TypeScript version is outdated and cannot guarantee type-safety with Kysely. Please upgrade to version 4.9 or newer.'>

package.json

@@ -27,10 +27,12 @@
   "engines": {
     "node": ">=20.0.0"
   },
-  "main": "dist/cjs/index.js",
-  "module": "dist/esm/index.js",
+  "type": "module",
+  "main": "./dist/index.cjs",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.cts",
   "typesVersions": {
-    "<4.6": {
+    "<4.9": {
       "*": [
         "outdated-typescript.d.ts"
       ]
@@ -39,39 +41,62 @@
   "files": [
     "dist",
     "helpers",
+    "migration.d.ts",
+    "migration.js",
     "outdated-typescript.d.ts"
   ],
   "exports": {
     ".": {
+      "types@<4.9": "./outdated-typescript.d.ts",
       "import": "./dist/esm/index.js",
       "require": "./dist/cjs/index.js",
       "default": "./dist/cjs/index.js"
     },
-    "./helpers/postgres": {
-      "import": "./dist/esm/helpers/postgres.js",
-      "require": "./dist/cjs/helpers/postgres.js",
-      "default": "./dist/cjs/helpers/postgres.js"
+    "./helpers/mssql": {
+      "import": {
+        "types": "./dist/helpers/mssql.d.ts",
+        "default": "./dist/helpers/mssql.js"
+      },
+      "require": {
+        "types": "./dist/helpers/mssql.d.cts",
+        "default": "./dist/helpers/mssql.cjs"
+      }
     },
     "./helpers/mysql": {
-      "import": "./dist/esm/helpers/mysql.js",
-      "require": "./dist/cjs/helpers/mysql.js",
-      "default": "./dist/cjs/helpers/mysql.js"
+      "import": {
+        "types": "./dist/helpers/mysql.d.ts",
+        "default": "./dist/helpers/mysql.js"
+      },
+      "require": {
+        "types": "./dist/helpers/mysql.d.cts",
+        "default": "./dist/helpers/mysql.cjs"
+      }
     },
-    "./helpers/mssql": {
-      "import": "./dist/esm/helpers/mssql.js",
-      "require": "./dist/cjs/helpers/mssql.js",
-      "default": "./dist/cjs/helpers/mssql.js"
+    "./helpers/postgres": {
+      "import": {
+        "types": "./dist/helpers/postgres.d.ts",
+        "default": "./dist/helpers/postgres.js"
+      },
+      "require": {
+        "types": "./dist/helpers/postgres.d.cts",
+        "default": "./dist/helpers/postgres.cjs"
+      }
     },
     "./helpers/sqlite": {
       "import": "./dist/esm/helpers/sqlite.js",
       "require": "./dist/cjs/helpers/sqlite.js",
       "default": "./dist/cjs/helpers/sqlite.js"
+    },
+    "./migration": {
+      "import": "./dist/esm/migration/index.js",
+      "require": "./dist/cjs/migration/index.js",
+      "default": "./dist/cjs/migration/index.js"
     }
   },
   "sideEffects": false,
   "scripts": {
     "clean": "rm -rf dist & rm -rf test/node/dist & rm -rf test/browser/bundle.js & rm -rf helpers",
-    "bench:ts": "pnpm build && cd ./test/ts-benchmarks && node --experimental-strip-types ./index.ts",
+    "bench:ts": "pnpm build && node --experimental-strip-types ./test/ts-benchmarks/index.ts",
     "test": "pnpm build && pnpm test:node:build && pnpm test:node:run && pnpm test:typings && pnpm test:esmimports && pnpm test:exports",
     "test:node:build": "tsc -p test/node",
     "test:node": "pnpm build && pnpm test:node:build && pnpm test:node:run",
@@ -84,15 +109,11 @@
     "test:typings": "tsd test/typings",
     "test:esmimports": "node scripts/check-esm-imports.js",
     "test:esbuild": "esbuild --bundle --platform=node --external:pg-native dist/esm/index.js --outfile=/dev/null",
-    "test:exports": "attw --pack . && node scripts/check-exports.js",
+    "test:exports": "node scripts/check-exports.js",
     "test:jsdocs": "deno check --doc-only --no-lock --unstable-sloppy-imports --config=\"deno.check.json\" ./src",
     "test:outdatedts": "pnpm build && cd test/outdated-ts && pnpm i && pnpm test",
     "lint:deno": "deno lint --config=\"deno.lint.json\" ./src",
     "prettier": "prettier --write 'src/**/*.ts' 'test/**/*.ts'",
-    "build": "pnpm clean && (pnpm build:esm & pnpm build:cjs) && pnpm script:module-fixup && pnpm script:copy-interface-doc",
-    "build:esm": "tsc -p tsconfig.json && pnpm script:add-deno-type-references",
-    "build:cjs": "tsc -p tsconfig-cjs.json",
-    "script:module-fixup": "node scripts/module-fixup.js",
     "script:copy-interface-doc": "node scripts/copy-interface-documentation.js",
     "script:add-deno-type-references": "node scripts/add-deno-type-references.js",
     "script:align-versions": "node --experimental-strip-types scripts/align-versions.mts",
@@ -109,11 +130,13 @@
     "Igal Klebanov <igalklebanov@gmail.com>"
   ],
   "devDependencies": {
-    "@arethetypeswrong/cli": "^0.18.2",
+    "@arethetypeswrong/core": "^0.18.2",
     "@ark/attest": "^0.56.0",
+    "@electric-sql/pglite": "^0.3.14",
     "@types/better-sqlite3": "^7.6.13",
     "@types/chai": "^5.2.3",
     "@types/chai-as-promised": "^8.0.2",
+    "@types/prototype-pollution-vulnerable-lodash.merge-dont-upgrade": "npm:@types/lodash.merge@4.6.1",
     "@types/mocha": "^10.0.10",
     "@types/node": "^25.5.0",
     "@types/pg": "^8.18.0",
@@ -129,11 +152,13 @@
     "mocha": "^11.7.5",
     "mysql2": "^3.20.0",
     "pathe": "^2.0.3",
+    "prototype-pollution-vulnerable-lodash.merge-dont-upgrade": "npm:lodash.merge@4.6.1",
     "pg": "^8.20.0",
     "pg-cursor": "^2.19.0",
     "pkg-types": "^2.3.0",
     "playwright": "^1.58.2",
     "prettier": "^3.8.1",
+    "publint": "^0.3.18",
     "semver": "^7.7.4",
     "sinon": "^21.0.3",
     "std-env": "^4.0.0",