feat: support for multiple registries (#109)

* feat: support for multiple registries * [autofix.ci] apply automated fixes * refactor: drop unnecessary check * fix: pass empty array instead undefined * [autofix.ci] apply automated fixes * fix: dont add registry set line * [autofix.ci] apply automated fixes * feat: few more tests * feat: add bun types * docs: explain registries * feat: save globally * [autofix.ci] apply automated fixes * ci: jsr registry test * ci: add , * ci: test * ci: test * ci: test * ci: test * [autofix.ci] apply automated fixes * feat: use @iarna/toml * [autofix.ci] apply automated fixes * feat: registry parsing * [autofix.ci] apply automated fixes * ci: verbose add * ci: registry install check * ci: registry install check * ci: registry install check * ci: verify registry usage * docs: registries * docs: important block * docs: show table * docs: show table * ci: shell * ci: registry test on linux * ci: registry test on linux * build: text lockfile --------- Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
2025-07-12 22:13:12 +08:00 · 2025-07-09 12:22:12 +02:00 · 2025-07-09 12:22:12 +02:00 · 34f777aec1
commit 34f777aec1
parent 7c641390eb
14 changed files with 901 additions and 117 deletions
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@ -23,10 +23,26 @@ jobs:
        env:
          GH_TOKEN: ${{ github.token }}

+  tests:
+    name: Tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: ./
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Run tests
+        run: bun test --coverage
+
  setup-bun:
    runs-on: ${{ matrix.os }}
    continue-on-error: true
-    needs: [remove-cache]
+    needs: [remove-cache, tests]

    strategy:
      matrix:
@ -65,7 +81,7 @@ jobs:
    name: setup-bun from (${{ matrix.os }}, ${{ matrix.file.name }})
    runs-on: ${{ matrix.os }}
    continue-on-error: true
-    needs: [remove-cache]
+    needs: [remove-cache, tests]
    strategy:
      matrix:
        os:
@ -130,7 +146,7 @@ jobs:
    name: setup-bun from (${{ matrix.os }}, download url)
    runs-on: ${{ matrix.os }}
    continue-on-error: true
-    needs: [remove-cache]
+    needs: [remove-cache, tests]

    strategy:
      matrix:
@ -153,3 +169,47 @@ jobs:
        id: run_bun
        run: |
          bun --version
+
+  test-custom-registries:
+    name: test installing deps from custom registries (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
+    continue-on-error: true
+    needs: [remove-cache, tests]
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+
+    steps:
+      - name: 📥 Checkout
+        uses: actions/checkout@v4
+
+      - name: 🛠️ Setup Bun
+        uses: ./
+        id: setup_bun
+        with:
+          registries: |
+            https://registry.npmjs.org
+            @types:https://registry.yarnpkg.com
+
+      - name: ▶️ Install from default registry
+        run: |
+          output=$(bun add is-odd --verbose --force 2>&1)
+
+          if echo "$output" | grep -q "HTTP/1.1 GET https://registry.npmjs.org/is-odd"; then
+            echo "Successfully installed from default registry"
+          else
+            echo "Failed to install from default registry"
+            exit 1
+          fi
+
+      - name: ▶️ Install from @types registry
+        run: |
+          output=$(bun add @types/bun --verbose --force 2>&1)
+
+          if echo "$output" | grep -q "HTTP/1.1 GET https://registry.yarnpkg.com/@types%2fbun"; then
+            echo "Successfully installed from @types registry"
+          else
+            echo "Failed to install from @types registry"
+            exit 1
+          fi
--- a/README.md
+++ b/README.md
@ -18,24 +18,42 @@ Download, install, and setup [Bun](https://bun.sh) in GitHub Actions.
    bun-version-file: ".bun-version"
 ```

-### Using a custom NPM registry
+## Using custom registries
+
+You can configure multiple package registries using the `registries` input. This supports both default and scoped registries with various authentication methods.
+
+### Registry configuration

 ```yaml
 - uses: oven-sh/setup-bun@v2
  with:
-    registry-url: "https://npm.pkg.github.com/"
-    scope: "@foo"
-```
+    registries: |
+      https://registry.npmjs.org/
+      @myorg:https://npm.pkg.github.com/|$GITHUB_TOKEN
+      @internal:https://username:$INTERNAL_PASSWORD@registry.internal.com/

-If you need to authenticate with a private registry, you can set the `BUN_AUTH_TOKEN` environment variable.
-
-```yaml
- name: Install Dependencies
+- name: Install dependencies
  env:
-    BUN_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
-  run: bun install --frozen-lockfile
+    GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    INTERNAL_PASSWORD: ${{ secrets.INTERNAL_PASSWORD }}
+  run: bun install
 ```

+#### Registry format options
+
+| Type                                 | Format                                                    |
+| ------------------------------------ | --------------------------------------------------------- |
+| Default registry                     | `https://registry.example.com/`                           |
+| Default registry with token          | `https://registry.example.com/\|$TOKEN`                   |
+| Scoped registry                      | `@scope:https://registry.example.com/`                    |
+| Scoped registry with token           | `@scope:https://registry.example.com/\|$TOKEN`            |
+| Scoped registry with URL credentials | `@scope:https://username:$PASSWORD@registry.example.com/` |
+
+> [!IMPORTANT]
+> When using authentication, make sure to set the corresponding environment variables in your workflow steps that need access to the registries.
+
+For more information about configuring registries in Bun, see the [official documentation](https://bun.sh/docs/install/registries).
+
 ### Override download url

 If you need to override the download URL, you can use the `bun-download-url` input.
--- a/action.yml
+++ b/action.yml
@ -17,12 +17,23 @@ inputs:
  bun-download-url:
    description: Override the URL to download Bun from. This skips version resolution and verifying AVX2 support.
    required: false
+  registries:
+    description: |
+      List of package registries with authentication support. Format:
+      - Default registry: https://registry.npmjs.org/
+      - Default with token: https://registry.npmjs.org/|token
+      - Scoped registry: @scope:https://registry.example.com/
+      - Scoped with token: @scope:https://registry.example.com/|token
+      - Scoped with credentials: @scope:https://user:pass@registry.example.com/
+    required: false
  registry-url:
    required: false
    description: The URL of the package registry to use for installing Bun. Set the $BUN_AUTH_TOKEN environment variable to authenticate with the registry.
+    deprecationMessage: "Use 'registries' input instead."
  scope:
    required: false
-    description: The scope for authenticating with the package registry.
+    description: "The scope for authenticating with the package registry."
+    deprecationMessage: "Use 'registries' input instead."
  no-cache:
    required: false
    type: boolean
--- a/bun.lock
+++ b/bun.lock
@ -3,14 +3,16 @@
  "workspaces": {
    "": {
      "dependencies": {
-        "@actions/cache": "^3.1.4",
-        "@actions/core": "^1.10.0",
+        "@actions/cache": "^4.0.0",
+        "@actions/core": "^1.11.0",
        "@actions/exec": "^1.1.1",
        "@actions/glob": "^0.4.0",
        "@actions/io": "^1.1.2",
        "@actions/tool-cache": "^2.0.1",
+        "@iarna/toml": "^2.2.5",
      },
      "devDependencies": {
+        "@types/bun": "^1.1.13",
        "@types/node": "^20.8.2",
        "esbuild": "^0.19.2",
        "prettier": "^3.4.2",
@ -19,9 +21,9 @@
    },
  },
  "packages": {
-    "@actions/cache": ["@actions/cache@3.2.4", "", { "dependencies": { "@actions/core": "^1.10.0", "@actions/exec": "^1.0.1", "@actions/glob": "^0.1.0", "@actions/http-client": "^2.1.1", "@actions/io": "^1.0.1", "@azure/abort-controller": "^1.1.0", "@azure/ms-rest-js": "^2.6.0", "@azure/storage-blob": "^12.13.0", "semver": "^6.3.1", "uuid": "^3.3.3" } }, "sha512-RuHnwfcDagtX+37s0ZWy7clbOfnZ7AlDJQ7k/9rzt2W4Gnwde3fa/qjSjVuz4vLcLIpc7fUob27CMrqiWZytYA=="],
+    "@actions/cache": ["@actions/cache@4.0.3", "", { "dependencies": { "@actions/core": "^1.11.1", "@actions/exec": "^1.0.1", "@actions/glob": "^0.1.0", "@actions/http-client": "^2.1.1", "@actions/io": "^1.0.1", "@azure/abort-controller": "^1.1.0", "@azure/ms-rest-js": "^2.6.0", "@azure/storage-blob": "^12.13.0", "@protobuf-ts/plugin": "^2.9.4", "semver": "^6.3.1" } }, "sha512-SvrqFtYJ7I48A/uXNkoJrnukx5weQv1fGquhs3+4nkByZThBH109KTIqj5x/cGV7JGNvb8dLPVywUOqX1fjiXg=="],

-    "@actions/core": ["@actions/core@1.10.1", "", { "dependencies": { "@actions/http-client": "^2.0.1", "uuid": "^8.3.2" } }, "sha512-3lBR9EDAY+iYIpTnTIXmWcNbX3T2kCkAEQGIQx4NVQ0575nk2k3GRZDTPQG+vVtS2izSLmINlxXf0uLtnrTP+g=="],
+    "@actions/core": ["@actions/core@1.11.1", "", { "dependencies": { "@actions/exec": "^1.1.1", "@actions/http-client": "^2.0.1" } }, "sha512-hXJCSrkwfA46Vd9Z3q4cpEpHB1rL5NG04+/rbqW9d3+CSvtB1tYe8UTpAlixa1vj0m/ULglfEK2UKxMGxCxv5A=="],

    "@actions/exec": ["@actions/exec@1.1.1", "", { "dependencies": { "@actions/io": "^1.0.1" } }, "sha512-+sCcHHbVdk93a0XT19ECtO/gIXoxvdsgQLzb2fE2/5sIZmWQuluYyjPQtrtTHdU1YzTZ7bAPN4sITq2xi1679w=="],

@ -53,6 +55,10 @@

    "@azure/storage-blob": ["@azure/storage-blob@12.17.0", "", { "dependencies": { "@azure/abort-controller": "^1.0.0", "@azure/core-http": "^3.0.0", "@azure/core-lro": "^2.2.0", "@azure/core-paging": "^1.1.1", "@azure/core-tracing": "1.0.0-preview.13", "@azure/logger": "^1.0.0", "events": "^3.0.0", "tslib": "^2.2.0" } }, "sha512-sM4vpsCpcCApagRW5UIjQNlNylo02my2opgp0Emi8x888hZUvJ3dN69Oq20cEGXkMUWnoCrBaB0zyS3yeB87sQ=="],

+    "@bufbuild/protobuf": ["@bufbuild/protobuf@2.6.0", "", {}, "sha512-6cuonJVNOIL7lTj5zgo/Rc2bKAo4/GvN+rKCrUj7GdEHRzCk8zKOfFwUsL9nAVk5rSIsRmlgcpLzTRysopEeeg=="],
+
+    "@bufbuild/protoplugin": ["@bufbuild/protoplugin@2.6.0", "", { "dependencies": { "@bufbuild/protobuf": "2.6.0", "@typescript/vfs": "^1.5.2", "typescript": "5.4.5" } }, "sha512-mfAwI+4GqUtbw/ddfyolEHaAL86ozRIVlOg2A+SVRbjx1CjsMc1YJO+hBSkt/pqfpR+PmWBbZLstHbXP8KGtMQ=="],
+
    "@esbuild/aix-ppc64": ["@esbuild/aix-ppc64@0.19.12", "", { "os": "aix", "cpu": "ppc64" }, "sha512-bmoCYyWdEL3wDQIVbcyzRyeKLgk2WtWLTWz1ZIAZF/EGbNOwSA6ew3PftJ1PqMiOOGu0OyFMzG53L0zqIpPeNA=="],

    "@esbuild/android-arm": ["@esbuild/android-arm@0.19.12", "", { "os": "android", "cpu": "arm" }, "sha512-qg/Lj1mu3CdQlDEEiWrlC4eaPZ1KztwGJ9B6J+/6G+/4ewxJg7gqj8eVYWvao1bXrqGiW2rsBZFSX3q2lcW05w=="],
@ -101,14 +107,30 @@

    "@fastify/busboy": ["@fastify/busboy@2.1.1", "", {}, "sha512-vBZP4NlzfOlerQTnba4aqZoMhE/a9HY7HRqoOPaETQcSQuWEIyZMHGfVu6w9wGtGK5fED5qRs2DteVCjOH60sA=="],

+    "@iarna/toml": ["@iarna/toml@2.2.5", "", {}, "sha512-trnsAYxU3xnS1gPHPyU961coFyLkh4gAD/0zQ5mymY4yOZ+CYvsPqUbOFSw0aDM4y0tV7tiFxL/1XfXPNC6IPg=="],
+
    "@opentelemetry/api": ["@opentelemetry/api@1.6.0", "", {}, "sha512-OWlrQAnWn9577PhVgqjUvMr1pg57Bc4jv0iL4w0PRuOSRvq67rvHW9Ie/dZVMvCzhSCB+UxhcY/PmCmFj33Q+g=="],

+    "@protobuf-ts/plugin": ["@protobuf-ts/plugin@2.11.1", "", { "dependencies": { "@bufbuild/protobuf": "^2.4.0", "@bufbuild/protoplugin": "^2.4.0", "@protobuf-ts/protoc": "^2.11.1", "@protobuf-ts/runtime": "^2.11.1", "@protobuf-ts/runtime-rpc": "^2.11.1", "typescript": "^3.9" }, "bin": { "protoc-gen-ts": "bin/protoc-gen-ts", "protoc-gen-dump": "bin/protoc-gen-dump" } }, "sha512-HyuprDcw0bEEJqkOWe1rnXUP0gwYLij8YhPuZyZk6cJbIgc/Q0IFgoHQxOXNIXAcXM4Sbehh6kjVnCzasElw1A=="],
+
+    "@protobuf-ts/protoc": ["@protobuf-ts/protoc@2.11.1", "", { "bin": { "protoc": "protoc.js" } }, "sha512-mUZJaV0daGO6HUX90o/atzQ6A7bbN2RSuHtdwo8SSF2Qoe3zHwa4IHyCN1evftTeHfLmdz+45qo47sL+5P8nyg=="],
+
+    "@protobuf-ts/runtime": ["@protobuf-ts/runtime@2.11.1", "", {}, "sha512-KuDaT1IfHkugM2pyz+FwiY80ejWrkH1pAtOBOZFuR6SXEFTsnb/jiQWQ1rCIrcKx2BtyxnxW6BWwsVSA/Ie+WQ=="],
+
+    "@protobuf-ts/runtime-rpc": ["@protobuf-ts/runtime-rpc@2.11.1", "", { "dependencies": { "@protobuf-ts/runtime": "^2.11.1" } }, "sha512-4CqqUmNA+/uMz00+d3CYKgElXO9VrEbucjnBFEjqI4GuDrEQ32MaI3q+9qPBvIGOlL4PmHXrzM32vBPWRhQKWQ=="],
+
+    "@types/bun": ["@types/bun@1.2.18", "", { "dependencies": { "bun-types": "1.2.18" } }, "sha512-Xf6RaWVheyemaThV0kUfaAUvCNokFr+bH8Jxp+tTZfx7dAPA8z9ePnP9S9+Vspzuxxx9JRAXhnyccRj3GyCMdQ=="],
+
    "@types/node": ["@types/node@20.12.2", "", { "dependencies": { "undici-types": "~5.26.4" } }, "sha512-zQ0NYO87hyN6Xrclcqp7f8ZbXNbRfoGWNcMvHTPQp9UUrwI0mI7XBz+cu7/W6/VClYo2g63B0cjull/srU7LgQ=="],

    "@types/node-fetch": ["@types/node-fetch@2.6.11", "", { "dependencies": { "@types/node": "*", "form-data": "^4.0.0" } }, "sha512-24xFj9R5+rfQJLRyM56qh+wnVSYhyXC2tkoBndtY0U+vubqNsYXGjufB2nn8Q6gt0LrARwL6UBtMCSVCwl4B1g=="],

+    "@types/react": ["@types/react@19.1.8", "", { "dependencies": { "csstype": "^3.0.2" } }, "sha512-AwAfQ2Wa5bCx9WP8nZL2uMZWod7J7/JSplxbTmBQ5ms6QpqNYm672H0Vu9ZVKVngQ+ii4R/byguVEUZQyeg44g=="],
+
    "@types/tunnel": ["@types/tunnel@0.0.3", "", { "dependencies": { "@types/node": "*" } }, "sha512-sOUTGn6h1SfQ+gbgqC364jLFBw2lnFqkgF3q0WovEHRLMrVD1sd5aufqi/aJObLekJO+Aq5z646U4Oxy6shXMA=="],

+    "@typescript/vfs": ["@typescript/vfs@1.6.1", "", { "dependencies": { "debug": "^4.1.1" }, "peerDependencies": { "typescript": "*" } }, "sha512-JwoxboBh7Oz1v38tPbkrZ62ZXNHAk9bJ7c9x0eI5zBfBnBYGhURdbnh7Z4smN/MV48Y5OCcZb58n972UtbazsA=="],
+
    "abort-controller": ["abort-controller@3.0.0", "", { "dependencies": { "event-target-shim": "^5.0.0" } }, "sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg=="],

    "asynckit": ["asynckit@0.4.0", "", {}, "sha512-Oei9OH4tRh0YqU3GxhX79dM/mwVgvbZJaSNaRk+bshkj0S5cfHcgYakreBjrHwatXKbz+IoIdYLxrKim2MjW0Q=="],
@ -117,10 +139,16 @@

    "brace-expansion": ["brace-expansion@1.1.11", "", { "dependencies": { "balanced-match": "^1.0.0", "concat-map": "0.0.1" } }, "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA=="],

+    "bun-types": ["bun-types@1.2.18", "", { "dependencies": { "@types/node": "*" }, "peerDependencies": { "@types/react": "^19" } }, "sha512-04+Eha5NP7Z0A9YgDAzMk5PHR16ZuLVa83b26kH5+cp1qZW4F6FmAURngE7INf4tKOvCE69vYvDEwoNl1tGiWw=="],
+
    "combined-stream": ["combined-stream@1.0.8", "", { "dependencies": { "delayed-stream": "~1.0.0" } }, "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg=="],

    "concat-map": ["concat-map@0.0.1", "", {}, "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg=="],

+    "csstype": ["csstype@3.1.3", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
+
+    "debug": ["debug@4.4.1", "", { "dependencies": { "ms": "^2.1.3" } }, "sha512-KcKCqiftBJcZr++7ykoDIEwSa3XWowTfNPo92BYxjXiyYEVrUQh2aLyhxBCwww+heortUFxEJYcRzosstTEBYQ=="],
+
    "delayed-stream": ["delayed-stream@1.0.0", "", {}, "sha512-ZySD7Nf91aLB0RxL4KGrKHBXl7Eds1DAmEdcoVawXnLD7SDhpNgtuII2aAkg7a7QS41jxPSZ17p4VdGnMHk3MQ=="],

    "esbuild": ["esbuild@0.19.12", "", { "optionalDependencies": { "@esbuild/aix-ppc64": "0.19.12", "@esbuild/android-arm": "0.19.12", "@esbuild/android-arm64": "0.19.12", "@esbuild/android-x64": "0.19.12", "@esbuild/darwin-arm64": "0.19.12", "@esbuild/darwin-x64": "0.19.12", "@esbuild/freebsd-arm64": "0.19.12", "@esbuild/freebsd-x64": "0.19.12", "@esbuild/linux-arm": "0.19.12", "@esbuild/linux-arm64": "0.19.12", "@esbuild/linux-ia32": "0.19.12", "@esbuild/linux-loong64": "0.19.12", "@esbuild/linux-mips64el": "0.19.12", "@esbuild/linux-ppc64": "0.19.12", "@esbuild/linux-riscv64": "0.19.12", "@esbuild/linux-s390x": "0.19.12", "@esbuild/linux-x64": "0.19.12", "@esbuild/netbsd-x64": "0.19.12", "@esbuild/openbsd-x64": "0.19.12", "@esbuild/sunos-x64": "0.19.12", "@esbuild/win32-arm64": "0.19.12", "@esbuild/win32-ia32": "0.19.12", "@esbuild/win32-x64": "0.19.12" }, "bin": { "esbuild": "bin/esbuild" } }, "sha512-aARqgq8roFBj054KvQr5f1sFu0D65G+miZRCuJyJ0G13Zwx7vRar5Zhn2tkQNzIXcBrNVsv/8stehpj+GAjgbg=="],
@ -137,6 +165,8 @@

    "minimatch": ["minimatch@3.1.2", "", { "dependencies": { "brace-expansion": "^1.1.7" } }, "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw=="],

+    "ms": ["ms@2.1.3", "", {}, "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="],
+
    "node-fetch": ["node-fetch@2.7.0", "", { "dependencies": { "whatwg-url": "^5.0.0" }, "peerDependencies": { "encoding": "^0.1.0" }, "optionalPeers": ["encoding"] }, "sha512-c4FRfUm/dbcWZ7U+1Wq0AwCyFL+3nt2bEw05wfxSz+DWpWsitgmSgYmy2dQdWyKC1694ELPqMs/YzUSNozLt8A=="],

    "prettier": ["prettier@3.4.2", "", { "bin": { "prettier": "bin/prettier.cjs" } }, "sha512-e9MewbtFo+Fevyuxn/4rrcDAaq0IYxPGLvObpQjiZBMAzB9IGmzlnG9RZy3FFas+eBMu2vA0CszMeduow5dIuQ=="],
@ -171,9 +201,9 @@

    "@actions/cache/@actions/glob": ["@actions/glob@0.1.2", "", { "dependencies": { "@actions/core": "^1.2.6", "minimatch": "^3.0.4" } }, "sha512-SclLR7Ia5sEqjkJTPs7Sd86maMDw43p769YxBOxvPvEWuPEhpAnBsQfENOpXjFYMmhCqd127bmf+YdvJqVqR4A=="],

-    "@actions/core/@actions/http-client": ["@actions/http-client@2.2.0", "", { "dependencies": { "tunnel": "^0.0.6", "undici": "^5.25.4" } }, "sha512-q+epW0trjVUUHboliPb4UF9g2msf+w61b32tAkFEwL/IwP0DQWgbCMM0Hbe3e3WXSKz5VcUXbzJQgy8Hkra/Lg=="],
+    "@actions/glob/@actions/core": ["@actions/core@1.10.1", "", { "dependencies": { "@actions/http-client": "^2.0.1", "uuid": "^8.3.2" } }, "sha512-3lBR9EDAY+iYIpTnTIXmWcNbX3T2kCkAEQGIQx4NVQ0575nk2k3GRZDTPQG+vVtS2izSLmINlxXf0uLtnrTP+g=="],

-    "@actions/core/uuid": ["uuid@8.3.2", "", { "bin": { "uuid": "dist/bin/uuid" } }, "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="],
+    "@actions/tool-cache/@actions/core": ["@actions/core@1.10.1", "", { "dependencies": { "@actions/http-client": "^2.0.1", "uuid": "^8.3.2" } }, "sha512-3lBR9EDAY+iYIpTnTIXmWcNbX3T2kCkAEQGIQx4NVQ0575nk2k3GRZDTPQG+vVtS2izSLmINlxXf0uLtnrTP+g=="],

    "@actions/tool-cache/@actions/http-client": ["@actions/http-client@2.2.0", "", { "dependencies": { "tunnel": "^0.0.6", "undici": "^5.25.4" } }, "sha512-q+epW0trjVUUHboliPb4UF9g2msf+w61b32tAkFEwL/IwP0DQWgbCMM0Hbe3e3WXSKz5VcUXbzJQgy8Hkra/Lg=="],

@ -193,11 +223,21 @@

    "@azure/ms-rest-js/uuid": ["uuid@8.3.2", "", { "bin": { "uuid": "dist/bin/uuid" } }, "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="],

+    "@bufbuild/protoplugin/typescript": ["typescript@5.4.5", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-vcI4UpRgg81oIRUFwR0WSIHKt11nJ7SAVlYNIu+QpqeyXP+gpQJy/Z4+F0aGxSE4MqwjyXvW/TzgkLAx2AGHwQ=="],
+
+    "@protobuf-ts/plugin/typescript": ["typescript@3.9.10", "", { "bin": { "tsc": "bin/tsc", "tsserver": "bin/tsserver" } }, "sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q=="],
+
    "@types/node-fetch/form-data": ["form-data@4.0.0", "", { "dependencies": { "asynckit": "^0.4.0", "combined-stream": "^1.0.8", "mime-types": "^2.1.12" } }, "sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww=="],

    "@types/tunnel/@types/node": ["@types/node@20.8.9", "", { "dependencies": { "undici-types": "~5.26.4" } }, "sha512-UzykFsT3FhHb1h7yD4CA4YhBHq545JC0YnEz41xkipN88eKQtL6rSgocL5tbAP6Ola9Izm/Aw4Ora8He4x0BHg=="],

-    "@actions/core/@actions/http-client/undici": ["undici@5.26.5", "", { "dependencies": { "@fastify/busboy": "^2.0.0" } }, "sha512-cSb4bPFd5qgR7qr2jYAi0hlX9n5YKK2ONKkLFkxl+v/9BvC0sOpZjBHDBSXc5lWAf5ty9oZdRXytBIHzgUcerw=="],
+    "@actions/cache/@actions/glob/@actions/core": ["@actions/core@1.10.1", "", { "dependencies": { "@actions/http-client": "^2.0.1", "uuid": "^8.3.2" } }, "sha512-3lBR9EDAY+iYIpTnTIXmWcNbX3T2kCkAEQGIQx4NVQ0575nk2k3GRZDTPQG+vVtS2izSLmINlxXf0uLtnrTP+g=="],
+
+    "@actions/glob/@actions/core/@actions/http-client": ["@actions/http-client@2.2.0", "", { "dependencies": { "tunnel": "^0.0.6", "undici": "^5.25.4" } }, "sha512-q+epW0trjVUUHboliPb4UF9g2msf+w61b32tAkFEwL/IwP0DQWgbCMM0Hbe3e3WXSKz5VcUXbzJQgy8Hkra/Lg=="],
+
+    "@actions/glob/@actions/core/uuid": ["uuid@8.3.2", "", { "bin": { "uuid": "dist/bin/uuid" } }, "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="],
+
+    "@actions/tool-cache/@actions/core/uuid": ["uuid@8.3.2", "", { "bin": { "uuid": "dist/bin/uuid" } }, "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="],

    "@actions/tool-cache/@actions/http-client/undici": ["undici@5.26.5", "", { "dependencies": { "@fastify/busboy": "^2.0.0" } }, "sha512-cSb4bPFd5qgR7qr2jYAi0hlX9n5YKK2ONKkLFkxl+v/9BvC0sOpZjBHDBSXc5lWAf5ty9oZdRXytBIHzgUcerw=="],

@ -205,8 +245,18 @@

    "@azure/core-http/@azure/core-util/@azure/abort-controller": ["@azure/abort-controller@2.1.1", "", { "dependencies": { "tslib": "^2.6.2" } }, "sha512-NhzeNm5zu2fPlwGXPUjzsRCRuPx5demaZyNcyNYJDqpa/Sbxzvo/RYt9IwUaAOnDW5+r7J9UOE6f22TQnb9nhQ=="],

-    "@actions/core/@actions/http-client/undici/@fastify/busboy": ["@fastify/busboy@2.0.0", "", {}, "sha512-JUFJad5lv7jxj926GPgymrWQxxjPYuJNiNjNMzqT+HiuP6Vl3dk5xzG+8sTX96np0ZAluvaMzPsjhHZ5rNuNQQ=="],
+    "@actions/cache/@actions/glob/@actions/core/@actions/http-client": ["@actions/http-client@2.2.0", "", { "dependencies": { "tunnel": "^0.0.6", "undici": "^5.25.4" } }, "sha512-q+epW0trjVUUHboliPb4UF9g2msf+w61b32tAkFEwL/IwP0DQWgbCMM0Hbe3e3WXSKz5VcUXbzJQgy8Hkra/Lg=="],
+
+    "@actions/cache/@actions/glob/@actions/core/uuid": ["uuid@8.3.2", "", { "bin": { "uuid": "dist/bin/uuid" } }, "sha512-+NYs2QeMWy+GWFOEm9xnn6HCDp0l7QBD7ml8zLUmJ+93Q5NF0NocErnwkTkXVFNiX3/fpC6afS8Dhb/gz7R7eg=="],
+
+    "@actions/glob/@actions/core/@actions/http-client/undici": ["undici@5.26.5", "", { "dependencies": { "@fastify/busboy": "^2.0.0" } }, "sha512-cSb4bPFd5qgR7qr2jYAi0hlX9n5YKK2ONKkLFkxl+v/9BvC0sOpZjBHDBSXc5lWAf5ty9oZdRXytBIHzgUcerw=="],

    "@actions/tool-cache/@actions/http-client/undici/@fastify/busboy": ["@fastify/busboy@2.0.0", "", {}, "sha512-JUFJad5lv7jxj926GPgymrWQxxjPYuJNiNjNMzqT+HiuP6Vl3dk5xzG+8sTX96np0ZAluvaMzPsjhHZ5rNuNQQ=="],
+
+    "@actions/cache/@actions/glob/@actions/core/@actions/http-client/undici": ["undici@5.26.5", "", { "dependencies": { "@fastify/busboy": "^2.0.0" } }, "sha512-cSb4bPFd5qgR7qr2jYAi0hlX9n5YKK2ONKkLFkxl+v/9BvC0sOpZjBHDBSXc5lWAf5ty9oZdRXytBIHzgUcerw=="],
+
+    "@actions/glob/@actions/core/@actions/http-client/undici/@fastify/busboy": ["@fastify/busboy@2.0.0", "", {}, "sha512-JUFJad5lv7jxj926GPgymrWQxxjPYuJNiNjNMzqT+HiuP6Vl3dk5xzG+8sTX96np0ZAluvaMzPsjhHZ5rNuNQQ=="],
+
+    "@actions/cache/@actions/glob/@actions/core/@actions/http-client/undici/@fastify/busboy": ["@fastify/busboy@2.0.0", "", {}, "sha512-JUFJad5lv7jxj926GPgymrWQxxjPYuJNiNjNMzqT+HiuP6Vl3dk5xzG+8sTX96np0ZAluvaMzPsjhHZ5rNuNQQ=="],
  }
 }
--- a/dist/setup/index.js
+++ b/dist/setup/index.js
--- a/package-lock.json
+++ b/package-lock.json
@ -14,9 +14,11 @@
        "@actions/exec": "^1.1.1",
        "@actions/glob": "^0.4.0",
        "@actions/io": "^1.1.2",
-        "@actions/tool-cache": "^2.0.1"
+        "@actions/tool-cache": "^2.0.1",
+        "@iarna/toml": "^2.2.5"
      },
      "devDependencies": {
+        "@types/bun": "^1.1.13",
        "@types/node": "^20.8.2",
        "esbuild": "^0.19.2",
        "prettier": "^3.4.2",
@ -271,6 +273,12 @@
        "node": ">=12"
      }
    },
+    "node_modules/@iarna/toml": {
+      "version": "2.2.5",
+      "resolved": "https://registry.npmjs.org/@iarna/toml/-/toml-2.2.5.tgz",
+      "integrity": "sha512-trnsAYxU3xnS1gPHPyU961coFyLkh4gAD/0zQ5mymY4yOZ+CYvsPqUbOFSw0aDM4y0tV7tiFxL/1XfXPNC6IPg==",
+      "license": "ISC"
+    },
    "node_modules/@opentelemetry/api": {
      "version": "1.5.0",
      "license": "Apache-2.0",
@ -348,6 +356,16 @@
        "@protobuf-ts/runtime": "^2.9.6"
      }
    },
+    "node_modules/@types/bun": {
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/@types/bun/-/bun-1.2.18.tgz",
+      "integrity": "sha512-Xf6RaWVheyemaThV0kUfaAUvCNokFr+bH8Jxp+tTZfx7dAPA8z9ePnP9S9+Vspzuxxx9JRAXhnyccRj3GyCMdQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "bun-types": "1.2.18"
+      }
+    },
    "node_modules/@types/node": {
      "version": "20.9.1",
      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.9.1.tgz",
@ -376,6 +394,17 @@
        "node": ">= 6"
      }
    },
+    "node_modules/@types/react": {
+      "version": "19.1.8",
+      "resolved": "https://registry.npmjs.org/@types/react/-/react-19.1.8.tgz",
+      "integrity": "sha512-AwAfQ2Wa5bCx9WP8nZL2uMZWod7J7/JSplxbTmBQ5ms6QpqNYm672H0Vu9ZVKVngQ+ii4R/byguVEUZQyeg44g==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true,
+      "dependencies": {
+        "csstype": "^3.0.2"
+      }
+    },
    "node_modules/@types/tunnel": {
      "version": "0.0.3",
      "license": "MIT",
@ -409,6 +438,19 @@
        "concat-map": "0.0.1"
      }
    },
+    "node_modules/bun-types": {
+      "version": "1.2.18",
+      "resolved": "https://registry.npmjs.org/bun-types/-/bun-types-1.2.18.tgz",
+      "integrity": "sha512-04+Eha5NP7Z0A9YgDAzMk5PHR16ZuLVa83b26kH5+cp1qZW4F6FmAURngE7INf4tKOvCE69vYvDEwoNl1tGiWw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      },
+      "peerDependencies": {
+        "@types/react": "^19"
+      }
+    },
    "node_modules/combined-stream": {
      "version": "1.0.8",
      "license": "MIT",
@ -423,6 +465,14 @@
      "version": "0.0.1",
      "license": "MIT"
    },
+    "node_modules/csstype": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.1.3.tgz",
+      "integrity": "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw==",
+      "dev": true,
+      "license": "MIT",
+      "peer": true
+    },
    "node_modules/delayed-stream": {
      "version": "1.0.0",
      "license": "MIT",
--- a/package.json
+++ b/package.json
@ -27,9 +27,11 @@
    "@actions/exec": "^1.1.1",
    "@actions/glob": "^0.4.0",
    "@actions/io": "^1.1.2",
-    "@actions/tool-cache": "^2.0.1"
+    "@actions/tool-cache": "^2.0.1",
+    "@iarna/toml": "^2.2.5"
  },
  "devDependencies": {
+    "@types/bun": "^1.1.13",
    "@types/node": "^20.8.2",
    "esbuild": "^0.19.2",
    "prettier": "^3.4.2",
--- a/src/action.ts
+++ b/src/action.ts
@ -12,9 +12,10 @@ import { addPath, info, warning } from "@actions/core";
 import { isFeatureAvailable, restoreCache } from "@actions/cache";
 import { downloadTool, extractZip } from "@actions/tool-cache";
 import { getExecOutput } from "@actions/exec";
-import { writeBunfig } from "./bunfig";
+import { writeBunfig, Registry } from "./bunfig";
 import { saveState } from "@actions/core";
 import { addExtension, retry } from "./utils";
+import { cwd } from "node:process";

 export type Input = {
  customUrl?: string;
@ -23,8 +24,7 @@ export type Input = {
  arch?: string;
  avx2?: boolean;
  profile?: boolean;
-  scope?: string;
-  registryUrl?: string;
+  registries?: Registry[];
  noCache?: boolean;
 };

@ -44,8 +44,8 @@ export type CacheState = {
 };

 export default async (options: Input): Promise<Output> => {
-  const bunfigPath = join(process.cwd(), "bunfig.toml");
-  writeBunfig(bunfigPath, options);
+  const bunfigPath = join(cwd(), "bunfig.toml");
+  writeBunfig(bunfigPath, options.registries);

  const url = getDownloadUrl(options);
  const cacheEnabled = isCacheEnabled(options);
--- a/src/bunfig.ts
+++ b/src/bunfig.ts
@ -1,50 +1,81 @@
-import { EOL } from "node:os";
-import { appendFileSync } from "node:fs";
+import { existsSync, readFileSync, writeFileSync } from "node:fs";
 import { info } from "@actions/core";
+import { parse, stringify } from "@iarna/toml";
+import { Registry } from "./registry";

-type BunfigOptions = {
-  registryUrl?: string;
-  scope?: string;
+type BunfigConfig = {
+  install?: {
+    registry?: {
+      url: string;
+      token?: string;
+    };
+    scopes?: Record<string, { url: string; token?: string }>;
+  };
+  [key: string]: any;
 };

-export function createBunfig(options: BunfigOptions): string | null {
-  const { registryUrl, scope } = options;
-
-  let url: URL | undefined;
-  if (registryUrl) {
-    try {
-      url = new URL(registryUrl);
-    } catch {
-      throw new Error(`Invalid registry-url: ${registryUrl}`);
-    }
-  }
-
-  let owner: string | undefined;
-  if (scope) {
-    owner = scope.startsWith("@")
-      ? scope.toLocaleLowerCase()
-      : `@${scope.toLocaleLowerCase()}`;
-  }
-
-  if (url && owner) {
-    return `[install.scopes]${EOL}'${owner}' = { token = "$BUN_AUTH_TOKEN", url = "${url}"}${EOL}`;
-  }
-
-  if (url && !owner) {
-    return `[install]${EOL}registry = "${url}"${EOL}`;
-  }
-
-  return null;
-}
-
-export function writeBunfig(path: string, options: BunfigOptions): void {
-  const bunfig = createBunfig(options);
-  if (!bunfig) {
+export function writeBunfig(path: string, registries: Registry[]): void {
+  if (!registries.length) {
    return;
  }

-  info(`Writing bunfig.toml to '${path}'.`);
-  appendFileSync(path, bunfig, {
-    encoding: "utf8",
+  let globalRegistryCount = 0;
+  registries.forEach((registry) => {
+    try {
+      new URL(registry.url);
+    } catch {
+      throw new Error(`Invalid registry URL: ${registry.url}`);
+    }
+
+    if (!registry.scope) {
+      globalRegistryCount++;
+    }
  });
+
+  if (globalRegistryCount > 1) {
+    throw new Error("You can't have more than one global registry.");
+  }
+
+  info(`Writing bunfig.toml to '${path}'.`);
+
+  let config: BunfigConfig = {};
+  if (existsSync(path)) {
+    try {
+      const content = readFileSync(path, { encoding: "utf-8" });
+      config = parse(content) as BunfigConfig;
+    } catch (error) {
+      info(`Error reading existing bunfig: ${error.message}`);
+      config = {};
+    }
+  }
+
+  config.install = config?.install || {};
+  config.install.scopes = config?.install.scopes || {};
+
+  const globalRegistry = registries.find((r) => !r.scope);
+  if (globalRegistry) {
+    config.install.registry = {
+      url: globalRegistry.url,
+      ...(globalRegistry.token ? { token: globalRegistry.token } : {}),
+    };
+  }
+
+  for (const registry of registries) {
+    if (registry.scope) {
+      const scopeName = registry.scope.startsWith("@")
+        ? registry.scope.toLowerCase()
+        : `@${registry.scope.toLowerCase()}`;
+
+      config.install.scopes[scopeName] = {
+        url: registry.url,
+        ...(registry.token ? { token: registry.token } : {}),
+      };
+    }
+  }
+
+  if (Object.keys(config.install.scopes).length === 0) {
+    delete config.install.scopes;
+  }
+
+  writeFileSync(path, stringify(config), { encoding: "utf8" });
 }
--- a/src/index.ts
+++ b/src/index.ts
@ -2,19 +2,33 @@ import { tmpdir } from "node:os";
 import { getInput, setOutput, setFailed, getBooleanInput } from "@actions/core";
 import runAction from "./action.js";
 import { readVersionFromFile } from "./utils.js";
+import { parseRegistries } from "./registry.js";

 if (!process.env.RUNNER_TEMP) {
  process.env.RUNNER_TEMP = tmpdir();
 }

+const registries = parseRegistries(getInput("registries"));
+
+// Backwards compatibility for the `registry-url` and `scope` inputs
+const registryUrl = getInput("registry-url");
+const scope = getInput("scope");
+
+if (registryUrl) {
+  registries.push({
+    url: registryUrl,
+    scope: scope,
+    token: "$BUN_AUTH_TOKEN",
+  });
+}
+
 runAction({
  version:
    getInput("bun-version") ||
    readVersionFromFile(getInput("bun-version-file")) ||
    undefined,
  customUrl: getInput("bun-download-url") || undefined,
-  registryUrl: getInput("registry-url") || undefined,
-  scope: getInput("scope") || undefined,
+  registries: registries,
  noCache: getBooleanInput("no-cache") || false,
 })
  .then(({ version, revision, bunPath, url, cacheHit }) => {
--- a/src/registry.ts
+++ b/src/registry.ts
@ -0,0 +1,62 @@
+export type Registry = {
+  url: string;
+  scope: string;
+  token?: string;
+};
+
+/**
+ * Parse registries from the simplified format:
+ * - Default registry: https://registry.npmjs.org/
+ * - Default registry with token: https://registry.npmjs.org/|token123
+ * - With scope and credentials in URL: @myorg:https://username:password@registry.myorg.com/
+ * - With scope and separate token: @partner:https://registry.partner.com/|basic_token
+ */
+export function parseRegistries(input: string): Registry[] {
+  if (!input?.trim()) return [];
+
+  return input
+    .split("\n")
+    .map((line) => line.trim())
+    .filter(Boolean)
+    .map(parseLine)
+    .filter(Boolean) as Registry[];
+}
+
+function parseLine(line: string): Registry | null {
+  const scopeMatch = line.match(
+    /^(@[a-z0-9-_.]+|[a-z0-9-_.]+(?=:[a-z]+:\/\/)):(.+)$/i,
+  );
+
+  if (scopeMatch) {
+    const scope = scopeMatch[1];
+    const urlPart = scopeMatch[2].trim();
+
+    const [url, token] = urlPart.split("|", 2).map((p) => p?.trim());
+
+    try {
+      new URL(url);
+
+      return {
+        url,
+        scope,
+        ...(token && { token }),
+      };
+    } catch (e) {
+      throw new Error(`Invalid URL in registry configuration: ${url}`);
+    }
+  } else {
+    const [url, token] = line.split("|", 2).map((p) => p?.trim());
+
+    try {
+      new URL(url);
+
+      return {
+        url,
+        scope: "",
+        ...(token && { token }),
+      };
+    } catch (e) {
+      throw new Error(`Invalid URL in registry configuration: ${url}`);
+    }
+  }
+}
--- a/tests/bunfig.spec.ts
+++ b/tests/bunfig.spec.ts
@ -0,0 +1,291 @@
+import { afterEach, describe, expect, it } from "bun:test";
+import { existsSync, unlinkSync } from "node:fs";
+import { writeBunfig } from "../src/bunfig";
+import { EOL } from "os";
+
+describe("writeBunfig", () => {
+  const filePath = "bunfig_test.toml";
+
+  async function getFileAndContents() {
+    const file = Bun.file(filePath);
+    const contents = (await file.text()).split(EOL);
+
+    return { file, contents };
+  }
+
+  afterEach(() => {
+    if (existsSync(filePath)) unlinkSync(filePath);
+    console.log(`${filePath} was deleted`);
+  });
+
+  describe("when no bunfig_test.toml file exists", () => {
+    it("should create a new file with scopes content", async () => {
+      writeBunfig(filePath, [
+        {
+          url: "https://npm.pkg.github.com",
+          scope: "foo-bar",
+          token: "$BUN_AUTH_TOKEN",
+        },
+      ]);
+
+      const { file, contents } = await getFileAndContents();
+
+      expect(file.exists()).resolves.toBeTrue();
+
+      const expectedContents = [
+        '[install.scopes."@foo-bar"]',
+        'url = "https://npm.pkg.github.com"',
+        'token = "$BUN_AUTH_TOKEN"',
+        "",
+      ];
+
+      contents.forEach((content, index) =>
+        expect(content).toBe(expectedContents[index])
+      );
+
+      expect(contents.length).toBe(expectedContents.length);
+    });
+
+    it("should create a new file with global registry", async () => {
+      writeBunfig(filePath, [
+        {
+          url: "https://npm.pkg.github.com",
+          scope: "",
+        },
+      ]);
+
+      const { file, contents } = await getFileAndContents();
+
+      expect(file.exists()).resolves.toBeTrue();
+
+      const expectedContents = [
+        "[install.registry]",
+        'url = "https://npm.pkg.github.com"',
+        "",
+      ];
+
+      contents.forEach((content, index) =>
+        expect(content).toBe(expectedContents[index])
+      );
+
+      expect(contents.length).toBe(expectedContents.length);
+    });
+
+    it("should create a new file with global registry & token", async () => {
+      writeBunfig(filePath, [
+        {
+          url: "https://npm.pkg.github.com",
+          scope: "",
+          token: "$BUN_AUTH_TOKEN",
+        },
+      ]);
+
+      const { file, contents } = await getFileAndContents();
+
+      expect(file.exists()).resolves.toBeTrue();
+
+      const expectedContents = [
+        "[install.registry]",
+        'url = "https://npm.pkg.github.com"',
+        'token = "$BUN_AUTH_TOKEN"',
+        "",
+      ];
+
+      contents.forEach((content, index) =>
+        expect(content).toBe(expectedContents[index])
+      );
+
+      expect(contents.length).toBe(expectedContents.length);
+    });
+  });
+
+  describe("when local bunfig_test.toml file exists", () => {
+    it("and no [install.scopes] exists, should concatenate file correctly", async () => {
+      const bunfig = `[install]${EOL}optional = true${EOL}${EOL}[install.cache]${EOL}disable = true`;
+
+      await Bun.write(filePath, bunfig);
+
+      writeBunfig(filePath, [
+        {
+          url: "https://npm.pkg.github.com",
+          scope: "foo-bar",
+          token: "$BUN_AUTH_TOKEN",
+        },
+      ]);
+
+      const { file, contents } = await getFileAndContents();
+
+      expect(file.exists()).resolves.toBeTrue();
+
+      const expectedContents = [
+        "[install]",
+        "optional = true",
+        "",
+        "  [install.cache]",
+        "  disable = true",
+        "",
+        '[install.scopes."@foo-bar"]',
+        'url = "https://npm.pkg.github.com"',
+        'token = "$BUN_AUTH_TOKEN"',
+        "",
+      ];
+
+      contents.forEach((content, index) =>
+        expect(content).toBe(expectedContents[index])
+      );
+
+      expect(contents.length).toBe(expectedContents.length);
+    });
+
+    it("and [install.scopes] exists and it's not the same registry, should concatenate file correctly", async () => {
+      const bunfig = `[install]${EOL}optional = true${EOL}${EOL}[install.scopes]${EOL}'@bla-ble' = { token = "$BUN_AUTH_TOKEN", url = "https://npm.pkg.github.com/" }${EOL}${EOL}[install.cache]${EOL}disable = true`;
+
+      await Bun.write(filePath, bunfig);
+
+      writeBunfig(filePath, [
+        {
+          url: "https://npm.pkg.github.com",
+          scope: "foo-bar",
+          token: "$BUN_AUTH_TOKEN",
+        },
+      ]);
+
+      const { file, contents } = await getFileAndContents();
+
+      expect(file.exists()).resolves.toBeTrue();
+
+      const expectedContents = [
+        "[install]",
+        "optional = true",
+        "",
+        '[install.scopes."@bla-ble"]',
+        'token = "$BUN_AUTH_TOKEN"',
+        'url = "https://npm.pkg.github.com/"',
+        "",
+        '[install.scopes."@foo-bar"]',
+        'url = "https://npm.pkg.github.com"',
+        'token = "$BUN_AUTH_TOKEN"',
+        "",
+        "  [install.cache]",
+        "  disable = true",
+        "",
+      ];
+
+      contents.forEach((content, index) =>
+        expect(content).toBe(expectedContents[index])
+      );
+
+      expect(contents.length).toBe(expectedContents.length);
+    });
+
+    it("and [install.scopes] exists and it's the same registry, should concatenate file correctly", async () => {
+      const bunfig = `[install]${EOL}optional = true${EOL}${EOL}[install.scopes]${EOL}'@foo-bar' = { token = "$BUN_AUTH_TOKEN", url = "https://npm.pkg.github.com/" }${EOL}'@bla-ble' = { token = "$BUN_AUTH_TOKEN", url = "https://npm.pkg.github.com/" }${EOL}${EOL}[install.cache]${EOL}disable = true`;
+
+      await Bun.write(filePath, bunfig);
+
+      writeBunfig(filePath, [
+        {
+          url: "https://npm.pkg.github.com",
+          scope: "foo-bar",
+          token: "$BUN_AUTH_TOKEN",
+        },
+      ]);
+
+      const { file, contents } = await getFileAndContents();
+
+      expect(file.exists()).resolves.toBeTrue();
+
+      const expectedContents = [
+        "[install]",
+        "optional = true",
+        "",
+        '[install.scopes."@foo-bar"]',
+        'url = "https://npm.pkg.github.com"',
+        'token = "$BUN_AUTH_TOKEN"',
+        "",
+        '[install.scopes."@bla-ble"]',
+        'token = "$BUN_AUTH_TOKEN"',
+        'url = "https://npm.pkg.github.com/"',
+        "",
+        "  [install.cache]",
+        "  disable = true",
+        "",
+      ];
+
+      contents.forEach((content, index) =>
+        expect(content).toBe(expectedContents[index])
+      );
+
+      expect(contents.length).toBe(expectedContents.length);
+    });
+
+    it("and [install.scopes] and [install] exists, should concantenate file correctly", async () => {
+      const bunfig = `[install]${EOL}optional = true${EOL}${EOL}[install.scopes]${EOL}'@foo-bar' = { token = "$BUN_AUTH_TOKEN", url = "https://npm.pkg.github.com/" }${EOL}'@bla-ble' = { token = "$BUN_AUTH_TOKEN", url = "https://npm.pkg.github.com/" }${EOL}${EOL}[install.cache]${EOL}disable = true`;
+
+      await Bun.write(filePath, bunfig);
+
+      writeBunfig(filePath, [
+        {
+          url: "https://npm.pkg.github.com",
+          scope: "foo-bar",
+          token: "$BUN_AUTH_TOKEN",
+        },
+        {
+          url: "https://bun.sh",
+          scope: "",
+          token: "$BUN_AUTH_TOKEN",
+        }, // global registry
+      ]);
+
+      const { file, contents } = await getFileAndContents();
+
+      expect(file.exists()).resolves.toBeTrue();
+
+      const expectedContents = [
+        "[install]",
+        "optional = true",
+        "",
+        '[install.scopes."@foo-bar"]',
+        'url = "https://npm.pkg.github.com"',
+        'token = "$BUN_AUTH_TOKEN"',
+        "",
+        '[install.scopes."@bla-ble"]',
+        'token = "$BUN_AUTH_TOKEN"',
+        'url = "https://npm.pkg.github.com/"',
+        "",
+        "  [install.cache]",
+        "  disable = true",
+        "",
+        "  [install.registry]",
+        '  url = "https://bun.sh"',
+        '  token = "$BUN_AUTH_TOKEN"',
+        "",
+      ];
+
+      contents.forEach((content, index) =>
+        expect(content).toBe(expectedContents[index])
+      );
+
+      expect(contents.length).toBe(expectedContents.length);
+    });
+  });
+
+  describe("when multiple global registries are provided", () => {
+    it("should throw an error", () => {
+      expect(() => {
+        writeBunfig(filePath, [
+          {
+            url: "https://npm.pkg.github.com",
+            scope: "",
+            token: "$BUN_AUTH_TOKEN",
+          },
+          {
+            url: "https://bun.sh",
+            scope: "",
+            token: "$BUN_AUTH_TOKEN",
+          },
+        ]);
+      }).toThrow("You can't have more than one global registry.");
+    });
+  });
+});
--- a/tests/registry.spec.ts
+++ b/tests/registry.spec.ts
@ -0,0 +1,170 @@
+import { describe, expect, it } from "bun:test";
+import { parseRegistries } from "../src/registry";
+
+describe("registry", () => {
+  describe("parseRegistries", () => {
+    it("should return an empty array for empty input", () => {
+      expect(parseRegistries("")).toEqual([]);
+      expect(parseRegistries("   ")).toEqual([]);
+      expect(parseRegistries(null as any)).toEqual([]);
+      expect(parseRegistries(undefined as any)).toEqual([]);
+    });
+
+    it("should parse default registry without token", () => {
+      const input = "https://registry.npmjs.org/";
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.npmjs.org/",
+          scope: "",
+        },
+      ]);
+    });
+
+    it("should parse default registry with token", () => {
+      const input = "https://registry.npmjs.org/|npm_token123";
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.npmjs.org/",
+          scope: "",
+          token: "npm_token123",
+        },
+      ]);
+    });
+
+    it("should parse scoped registry with URL credentials", () => {
+      const input = "@myorg:https://username:password@registry.myorg.com/";
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://username:password@registry.myorg.com/",
+          scope: "@myorg",
+        },
+      ]);
+    });
+
+    it("should parse scoped registry with separate token", () => {
+      const input = "@partner:https://registry.partner.com/|token_abc123";
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.partner.com/",
+          scope: "@partner",
+          token: "token_abc123",
+        },
+      ]);
+    });
+
+    it("should parse multiple registries", () => {
+      const input = `
+        https://registry.npmjs.org/
+        @myorg:https://username:password@registry.myorg.com/
+        @partner:https://registry.partner.com/|token_abc123
+      `;
+
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.npmjs.org/",
+          scope: "",
+        },
+        {
+          url: "https://username:password@registry.myorg.com/",
+          scope: "@myorg",
+        },
+        {
+          url: "https://registry.partner.com/",
+          scope: "@partner",
+          token: "token_abc123",
+        },
+      ]);
+    });
+
+    it("should handle scope names without @ prefix", () => {
+      const input = "myorg:https://registry.myorg.com/|token123";
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.myorg.com/",
+          scope: "myorg",
+          token: "token123",
+        },
+      ]);
+    });
+
+    it("should throw error for invalid URLs", () => {
+      expect(() => {
+        parseRegistries("@myorg:not-a-valid-url");
+      }).toThrow("Invalid URL in registry configuration: not-a-valid-url");
+
+      expect(() => {
+        parseRegistries("also-not-a-valid-url");
+      }).toThrow("Invalid URL in registry configuration: also-not-a-valid-url");
+    });
+
+    it("should handle whitespace and empty lines", () => {
+      const input = `
+
+        https://registry.npmjs.org/
+
+        @myorg:https://registry.myorg.com/|token123
+
+      `;
+
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.npmjs.org/",
+          scope: "",
+        },
+        {
+          url: "https://registry.myorg.com/",
+          scope: "@myorg",
+          token: "token123",
+        },
+      ]);
+    });
+
+    it("should handle URLs with paths and query parameters", () => {
+      const input =
+        "@myorg:https://registry.myorg.com/npm/registry/?timeout=5000|token123";
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.myorg.com/npm/registry/?timeout=5000",
+          scope: "@myorg",
+          token: "token123",
+        },
+      ]);
+    });
+
+    it("should correctly handle scopes with hyphens and underscores", () => {
+      const input = `
+        @my-org:https://registry.myorg.com/
+        @my_org:https://registry.myorg.com/
+      `;
+
+      const result = parseRegistries(input);
+
+      expect(result).toEqual([
+        {
+          url: "https://registry.myorg.com/",
+          scope: "@my-org",
+        },
+        {
+          url: "https://registry.myorg.com/",
+          scope: "@my_org",
+        },
+      ]);
+    });
+  });
+});
--- a/tests/tsconfig.json
+++ b/tests/tsconfig.json
@ -0,0 +1,8 @@
+{
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "types": [
+      "bun"
+    ]
+  }
+}