33 files changed, 1626 insertions, 0 deletions

diff --git a/packages/eslint-plugin-turbo/LICENSE b/packages/eslint-plugin-turbo/LICENSE
new file mode 100644
index 0000000..fa0086a
--- /dev/null
+++ b/packages/eslint-plugin-turbo/LICENSE
@@ -0,0 +1,373 @@
+Mozilla Public License Version 2.0
+==================================
+
+1. Definitions
+--------------
+
+1.1. "Contributor"
+    means each individual or legal entity that creates, contributes to
+    the creation of, or owns Covered Software.
+
+1.2. "Contributor Version"
+    means the combination of the Contributions of others (if any) used
+    by a Contributor and that particular Contributor's Contribution.
+
+1.3. "Contribution"
+    means Covered Software of a particular Contributor.
+
+1.4. "Covered Software"
+    means Source Code Form to which the initial Contributor has attached
+    the notice in Exhibit A, the Executable Form of such Source Code
+    Form, and Modifications of such Source Code Form, in each case
+    including portions thereof.
+
+1.5. "Incompatible With Secondary Licenses"
+    means
+
+    (a) that the initial Contributor has attached the notice described
+        in Exhibit B to the Covered Software; or
+
+    (b) that the Covered Software was made available under the terms of
+        version 1.1 or earlier of the License, but not also under the
+        terms of a Secondary License.
+
+1.6. "Executable Form"
+    means any form of the work other than Source Code Form.
+
+1.7. "Larger Work"
+    means a work that combines Covered Software with other material, in
+    a separate file or files, that is not Covered Software.
+
+1.8. "License"
+    means this document.
+
+1.9. "Licensable"
+    means having the right to grant, to the maximum extent possible,
+    whether at the time of the initial grant or subsequently, any and
+    all of the rights conveyed by this License.
+
+1.10. "Modifications"
+    means any of the following:
+
+    (a) any file in Source Code Form that results from an addition to,
+        deletion from, or modification of the contents of Covered
+        Software; or
+
+    (b) any new file in Source Code Form that contains any Covered
+        Software.
+
+1.11. "Patent Claims" of a Contributor
+    means any patent claim(s), including without limitation, method,
+    process, and apparatus claims, in any patent Licensable by such
+    Contributor that would be infringed, but for the grant of the
+    License, by the making, using, selling, offering for sale, having
+    made, import, or transfer of either its Contributions or its
+    Contributor Version.
+
+1.12. "Secondary License"
+    means either the GNU General Public License, Version 2.0, the GNU
+    Lesser General Public License, Version 2.1, the GNU Affero General
+    Public License, Version 3.0, or any later versions of those
+    licenses.
+
+1.13. "Source Code Form"
+    means the form of the work preferred for making modifications.
+
+1.14. "You" (or "Your")
+    means an individual or a legal entity exercising rights under this
+    License. For legal entities, "You" includes any entity that
+    controls, is controlled by, or is under common control with You. For
+    purposes of this definition, "control" means (a) the power, direct
+    or indirect, to cause the direction or management of such entity,
+    whether by contract or otherwise, or (b) ownership of more than
+    fifty percent (50%) of the outstanding shares or beneficial
+    ownership of such entity.
+
+2. License Grants and Conditions
+--------------------------------
+
+2.1. Grants
+
+Each Contributor hereby grants You a world-wide, royalty-free,
+non-exclusive license:
+
+(a) under intellectual property rights (other than patent or trademark)
+    Licensable by such Contributor to use, reproduce, make available,
+    modify, display, perform, distribute, and otherwise exploit its
+    Contributions, either on an unmodified basis, with Modifications, or
+    as part of a Larger Work; and
+
+(b) under Patent Claims of such Contributor to make, use, sell, offer
+    for sale, have made, import, and otherwise transfer either its
+    Contributions or its Contributor Version.
+
+2.2. Effective Date
+
+The licenses granted in Section 2.1 with respect to any Contribution
+become effective for each Contribution on the date the Contributor first
+distributes such Contribution.
+
+2.3. Limitations on Grant Scope
+
+The licenses granted in this Section 2 are the only rights granted under
+this License. No additional rights or licenses will be implied from the
+distribution or licensing of Covered Software under this License.
+Notwithstanding Section 2.1(b) above, no patent license is granted by a
+Contributor:
+
+(a) for any code that a Contributor has removed from Covered Software;
+    or
+
+(b) for infringements caused by: (i) Your and any other third party's
+    modifications of Covered Software, or (ii) the combination of its
+    Contributions with other software (except as part of its Contributor
+    Version); or
+
+(c) under Patent Claims infringed by Covered Software in the absence of
+    its Contributions.
+
+This License does not grant any rights in the trademarks, service marks,
+or logos of any Contributor (except as may be necessary to comply with
+the notice requirements in Section 3.4).
+
+2.4. Subsequent Licenses
+
+No Contributor makes additional grants as a result of Your choice to
+distribute the Covered Software under a subsequent version of this
+License (see Section 10.2) or under the terms of a Secondary License (if
+permitted under the terms of Section 3.3).
+
+2.5. Representation
+
+Each Contributor represents that the Contributor believes its
+Contributions are its original creation(s) or it has sufficient rights
+to grant the rights to its Contributions conveyed by this License.
+
+2.6. Fair Use
+
+This License is not intended to limit any rights You have under
+applicable copyright doctrines of fair use, fair dealing, or other
+equivalents.
+
+2.7. Conditions
+
+Sections 3.1, 3.2, 3.3, and 3.4 are conditions of the licenses granted
+in Section 2.1.
+
+3. Responsibilities
+-------------------
+
+3.1. Distribution of Source Form
+
+All distribution of Covered Software in Source Code Form, including any
+Modifications that You create or to which You contribute, must be under
+the terms of this License. You must inform recipients that the Source
+Code Form of the Covered Software is governed by the terms of this
+License, and how they can obtain a copy of this License. You may not
+attempt to alter or restrict the recipients' rights in the Source Code
+Form.
+
+3.2. Distribution of Executable Form
+
+If You distribute Covered Software in Executable Form then:
+
+(a) such Covered Software must also be made available in Source Code
+    Form, as described in Section 3.1, and You must inform recipients of
+    the Executable Form how they can obtain a copy of such Source Code
+    Form by reasonable means in a timely manner, at a charge no more
+    than the cost of distribution to the recipient; and
+
+(b) You may distribute such Executable Form under the terms of this
+    License, or sublicense it under different terms, provided that the
+    license for the Executable Form does not attempt to limit or alter
+    the recipients' rights in the Source Code Form under this License.
+
+3.3. Distribution of a Larger Work
+
+You may create and distribute a Larger Work under terms of Your choice,
+provided that You also comply with the requirements of this License for
+the Covered Software. If the Larger Work is a combination of Covered
+Software with a work governed by one or more Secondary Licenses, and the
+Covered Software is not Incompatible With Secondary Licenses, this
+License permits You to additionally distribute such Covered Software
+under the terms of such Secondary License(s), so that the recipient of
+the Larger Work may, at their option, further distribute the Covered
+Software under the terms of either this License or such Secondary
+License(s).
+
+3.4. Notices
+
+You may not remove or alter the substance of any license notices
+(including copyright notices, patent notices, disclaimers of warranty,
+or limitations of liability) contained within the Source Code Form of
+the Covered Software, except that You may alter any license notices to
+the extent required to remedy known factual inaccuracies.
+
+3.5. Application of Additional Terms
+
+You may choose to offer, and to charge a fee for, warranty, support,
+indemnity or liability obligations to one or more recipients of Covered
+Software. However, You may do so only on Your own behalf, and not on
+behalf of any Contributor. You must make it absolutely clear that any
+such warranty, support, indemnity, or liability obligation is offered by
+You alone, and You hereby agree to indemnify every Contributor for any
+liability incurred by such Contributor as a result of warranty, support,
+indemnity or liability terms You offer. You may include additional
+disclaimers of warranty and limitations of liability specific to any
+jurisdiction.
+
+4. Inability to Comply Due to Statute or Regulation
+---------------------------------------------------
+
+If it is impossible for You to comply with any of the terms of this
+License with respect to some or all of the Covered Software due to
+statute, judicial order, or regulation then You must: (a) comply with
+the terms of this License to the maximum extent possible; and (b)
+describe the limitations and the code they affect. Such description must
+be placed in a text file included with all distributions of the Covered
+Software under this License. Except to the extent prohibited by statute
+or regulation, such description must be sufficiently detailed for a
+recipient of ordinary skill to be able to understand it.
+
+5. Termination
+--------------
+
+5.1. The rights granted under this License will terminate automatically
+if You fail to comply with any of its terms. However, if You become
+compliant, then the rights granted under this License from a particular
+Contributor are reinstated (a) provisionally, unless and until such
+Contributor explicitly and finally terminates Your grants, and (b) on an
+ongoing basis, if such Contributor fails to notify You of the
+non-compliance by some reasonable means prior to 60 days after You have
+come back into compliance. Moreover, Your grants from a particular
+Contributor are reinstated on an ongoing basis if such Contributor
+notifies You of the non-compliance by some reasonable means, this is the
+first time You have received notice of non-compliance with this License
+from such Contributor, and You become compliant prior to 30 days after
+Your receipt of the notice.
+
+5.2. If You initiate litigation against any entity by asserting a patent
+infringement claim (excluding declaratory judgment actions,
+counter-claims, and cross-claims) alleging that a Contributor Version
+directly or indirectly infringes any patent, then the rights granted to
+You by any and all Contributors for the Covered Software under Section
+2.1 of this License shall terminate.
+
+5.3. In the event of termination under Sections 5.1 or 5.2 above, all
+end user license agreements (excluding distributors and resellers) which
+have been validly granted by You or Your distributors under this License
+prior to termination shall survive termination.
+
+************************************************************************
+*                                                                      *
+*  6. Disclaimer of Warranty                                           *
+*  -------------------------                                           *
+*                                                                      *
+*  Covered Software is provided under this License on an "as is"       *
+*  basis, without warranty of any kind, either expressed, implied, or  *
+*  statutory, including, without limitation, warranties that the       *
+*  Covered Software is free of defects, merchantable, fit for a        *
+*  particular purpose or non-infringing. The entire risk as to the     *
+*  quality and performance of the Covered Software is with You.        *
+*  Should any Covered Software prove defective in any respect, You     *
+*  (not any Contributor) assume the cost of any necessary servicing,   *
+*  repair, or correction. This disclaimer of warranty constitutes an   *
+*  essential part of this License. No use of any Covered Software is   *
+*  authorized under this License except under this disclaimer.         *
+*                                                                      *
+************************************************************************
+
+************************************************************************
+*                                                                      *
+*  7. Limitation of Liability                                          *
+*  --------------------------                                          *
+*                                                                      *
+*  Under no circumstances and under no legal theory, whether tort      *
+*  (including negligence), contract, or otherwise, shall any           *
+*  Contributor, or anyone who distributes Covered Software as          *
+*  permitted above, be liable to You for any direct, indirect,         *
+*  special, incidental, or consequential damages of any character      *
+*  including, without limitation, damages for lost profits, loss of    *
+*  goodwill, work stoppage, computer failure or malfunction, or any    *
+*  and all other commercial damages or losses, even if such party      *
+*  shall have been informed of the possibility of such damages. This   *
+*  limitation of liability shall not apply to liability for death or   *
+*  personal injury resulting from such party's negligence to the       *
+*  extent applicable law prohibits such limitation. Some               *
+*  jurisdictions do not allow the exclusion or limitation of           *
+*  incidental or consequential damages, so this exclusion and          *
+*  limitation may not apply to You.                                    *
+*                                                                      *
+************************************************************************
+
+8. Litigation
+-------------
+
+Any litigation relating to this License may be brought only in the
+courts of a jurisdiction where the defendant maintains its principal
+place of business and such litigation shall be governed by laws of that
+jurisdiction, without reference to its conflict-of-law provisions.
+Nothing in this Section shall prevent a party's ability to bring
+cross-claims or counter-claims.
+
+9. Miscellaneous
+----------------
+
+This License represents the complete agreement concerning the subject
+matter hereof. If any provision of this License is held to be
+unenforceable, such provision shall be reformed only to the extent
+necessary to make it enforceable. Any law or regulation which provides
+that the language of a contract shall be construed against the drafter
+shall not be used to construe this License against a Contributor.
+
+10. Versions of the License
+---------------------------
+
+10.1. New Versions
+
+Mozilla Foundation is the license steward. Except as provided in Section
+10.3, no one other than the license steward has the right to modify or
+publish new versions of this License. Each version will be given a
+distinguishing version number.
+
+10.2. Effect of New Versions
+
+You may distribute the Covered Software under the terms of the version
+of the License under which You originally received the Covered Software,
+or under the terms of any subsequent version published by the license
+steward.
+
+10.3. Modified Versions
+
+If you create software not governed by this License, and you want to
+create a new license for such software, you may create and use a
+modified version of this License if you rename the license and remove
+any references to the name of the license steward (except to note that
+such modified license differs from this License).
+
+10.4. Distributing Source Code Form that is Incompatible With Secondary
+Licenses
+
+If You choose to distribute Source Code Form that is Incompatible With
+Secondary Licenses under the terms of this version of the License, the
+notice described in Exhibit B of this License must be attached.
+
+Exhibit A - Source Code Form License Notice
+-------------------------------------------
+
+  This Source Code Form is subject to the terms of the Mozilla Public
+  License, v. 2.0. If a copy of the MPL was not distributed with this
+  file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+If it is not possible or desirable to put the notice in a particular
+file, then You may include the notice in a location (such as a LICENSE
+file in a relevant directory) where a recipient would be likely to look
+for such a notice.
+
+You may add additional accurate notices of copyright ownership.
+
+Exhibit B - "Incompatible With Secondary Licenses" Notice
+---------------------------------------------------------
+
+  This Source Code Form is "Incompatible With Secondary Licenses", as
+  defined by the Mozilla Public License, v. 2.0.
\ No newline at end of file
diff --git a/packages/eslint-plugin-turbo/README.md b/packages/eslint-plugin-turbo/README.md
new file mode 100644
index 0000000..83627a1
--- /dev/null
+++ b/packages/eslint-plugin-turbo/README.md
@@ -0,0 +1,53 @@
+# `eslint-plugin-turbo`
+
+Ease configuration for Turborepo
+
+## Installation
+
+1. You'll first need to install [ESLint](https://eslint.org/):
+
+```sh
+npm install eslint --save-dev
+```
+
+2. Next, install `eslint-plugin-turbo`:
+
+```sh
+npm install eslint-plugin-turbo --save-dev
+```
+
+## Usage
+
+Add `turbo` to the plugins section of your `.eslintrc` configuration file. You can omit the `eslint-plugin-` prefix:
+
+```json
+{
+  "plugins": ["turbo"]
+}
+```
+
+Then configure the rules you want to use under the rules section.
+
+```json
+{
+  "rules": {
+    "turbo/no-undeclared-env-vars": "error"
+  }
+}
+```
+
+### Example
+
+```json
+{
+  "plugins": ["turbo"],
+  "rules": {
+    "turbo/no-undeclared-env-vars": [
+      "error",
+      {
+        "allowList": ["^ENV_[A-Z]+$"]
+      }
+    ]
+  }
+}
+```
diff --git a/packages/eslint-plugin-turbo/__fixtures__/configs/single/turbo.json b/packages/eslint-plugin-turbo/__fixtures__/configs/single/turbo.json
new file mode 100644
index 0000000..22b79b5
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/configs/single/turbo.json
@@ -0,0 +1,25 @@
+{
+  // new style, global env dependency
+  "globalEnv": ["NEW_STYLE_GLOBAL_ENV_KEY", "$NEW_STYLE_GLOBAL_ENV_KEY"],
+  // old style, global env dependency (deprecated)
+  "globalDependencies": ["$GLOBAL_ENV_KEY"],
+  "pipeline": {
+    "test": {
+      "outputs": ["coverage/**"],
+      "dependsOn": ["^build"]
+    },
+    "lint": {
+      "outputs": []
+    },
+    "dev": {
+      "cache": false
+    },
+    "build": {
+      "outputs": ["dist/**", ".next/**", "!.next/.cache/**"],
+      // task level env var deps
+      "env": ["NEW_STYLE_ENV_KEY"],
+      // old task level env var deps (deprecated)
+      "dependsOn": ["^build", "$TASK_ENV_KEY", "$ANOTHER_ENV_KEY"]
+    }
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/index.js b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/index.js
new file mode 100644
index 0000000..4de53f5
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/index.js
@@ -0,0 +1,6 @@
+export default function docs() {
+  if (process.env.ENV_1 === undefined) {
+    return "does not exist";
+  }
+  return "exists";
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/package.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/package.json
new file mode 100644
index 0000000..82f9a44
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "docs",
+  "version": "1.0.0"
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/turbo.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/turbo.json
new file mode 100644
index 0000000..a3713ef
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/docs/turbo.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "https://turbo.build/schema.json",
+  "extends": ["//"],
+  "pipeline": {
+    "build": {
+      "env": ["ENV_3"]
+    }
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/index.js b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/index.js
new file mode 100644
index 0000000..bfd3ab8
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/index.js
@@ -0,0 +1,6 @@
+export default function web() {
+  if (!process.env.ENV_2) {
+    return "bar";
+  }
+  return "foo";
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/package.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/package.json
new file mode 100644
index 0000000..d8a83ed
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "web",
+  "version": "1.0.0"
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/turbo.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/turbo.json
new file mode 100644
index 0000000..0d1b80f
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/apps/web/turbo.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "https://turbo.build/schema.json",
+  "extends": ["//"],
+  "pipeline": {
+    "build": {
+      "env": ["ENV_2"]
+    }
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/package.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/package.json
new file mode 100644
index 0000000..c6616a6
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/package.json
@@ -0,0 +1,14 @@
+{
+  "private": true,
+  "workspaces": [
+    "apps/*",
+    "packages/*"
+  ],
+  "scripts": {
+    "build": "turbo run build"
+  },
+  "devDependencies": {
+    "turbo": "latest"
+  },
+  "packageManager": "yarn@1.22.19"
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/index.js b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/index.js
new file mode 100644
index 0000000..dee5e80
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/index.js
@@ -0,0 +1,6 @@
+export default function foo() {
+  if (!process.env.IS_SERVER) {
+    return "bar";
+  }
+  return "foo";
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/package.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/package.json
new file mode 100644
index 0000000..7cb7cf1
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/package.json
@@ -0,0 +1,4 @@
+{
+  "name": "ui",
+  "version": "1.0.0"
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/turbo.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/turbo.json
new file mode 100644
index 0000000..8bff09e
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/packages/ui/turbo.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "https://turbo.build/schema.json",
+  "extends": ["//"],
+  "pipeline": {
+    "build": {
+      "env": ["IS_SERVER"]
+    }
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/turbo.json b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/turbo.json
new file mode 100644
index 0000000..cb4fb20
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace-configs/turbo.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "https://turbo.build/schema.json",
+  "globalEnv": ["CI"],
+  "pipeline": {
+    "build": {
+      "env": ["ENV_1"]
+    }
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace/.eslintrc.js b/packages/eslint-plugin-turbo/__fixtures__/workspace/.eslintrc.js
new file mode 100644
index 0000000..8dc66dc
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace/.eslintrc.js
@@ -0,0 +1,4 @@
+module.exports = {
+  root: true,
+  extends: ["plugin:turbo/recommended"],
+};
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace/child/child.js b/packages/eslint-plugin-turbo/__fixtures__/workspace/child/child.js
new file mode 100644
index 0000000..9e799a2
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace/child/child.js
@@ -0,0 +1,2 @@
+process.env.NONEXISTENT;
+process.env.CI;
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace/package-lock.json b/packages/eslint-plugin-turbo/__fixtures__/workspace/package-lock.json
new file mode 100644
index 0000000..301f072
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace/package-lock.json
@@ -0,0 +1,58 @@
+{
+  "name": "workspace",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "dependencies": {
+        "eslint-plugin-turbo": "../../"
+      }
+    },
+    "../..": {
+      "version": "1.9.0",
+      "license": "MPL-2.0",
+      "devDependencies": {
+        "@turbo/test-utils": "workspace:*",
+        "@turbo/tsconfig": "workspace:*",
+        "@turbo/types": "workspace:*",
+        "@turbo/utils": "workspace:*",
+        "@types/eslint": "^8.4.5",
+        "@types/estree": "^1.0.0",
+        "@types/jest": "^27.4.0",
+        "@types/node": "^16.11.12",
+        "jest": "^27.4.3",
+        "json5": "^2.2.1",
+        "ts-jest": "^27.1.1",
+        "tsup": "^6.2.0",
+        "typescript": "^4.7.4"
+      },
+      "peerDependencies": {
+        "eslint": ">6.6.0"
+      }
+    },
+    "node_modules/eslint-plugin-turbo": {
+      "resolved": "../..",
+      "link": true
+    }
+  },
+  "dependencies": {
+    "eslint-plugin-turbo": {
+      "version": "file:../..",
+      "requires": {
+        "@turbo/test-utils": "workspace:*",
+        "@turbo/tsconfig": "workspace:*",
+        "@turbo/types": "workspace:*",
+        "@turbo/utils": "workspace:*",
+        "@types/eslint": "^8.4.5",
+        "@types/estree": "^1.0.0",
+        "@types/jest": "^27.4.0",
+        "@types/node": "^16.11.12",
+        "jest": "^27.4.3",
+        "json5": "^2.2.1",
+        "ts-jest": "^27.1.1",
+        "tsup": "^6.2.0",
+        "typescript": "^4.7.4"
+      }
+    }
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace/package.json b/packages/eslint-plugin-turbo/__fixtures__/workspace/package.json
new file mode 100644
index 0000000..a1b2929
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace/package.json
@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "eslint-plugin-turbo": "../../"
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace/peer.js b/packages/eslint-plugin-turbo/__fixtures__/workspace/peer.js
new file mode 100644
index 0000000..16c8bb0
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace/peer.js
@@ -0,0 +1 @@
+process.env.CI;
diff --git a/packages/eslint-plugin-turbo/__fixtures__/workspace/turbo.json b/packages/eslint-plugin-turbo/__fixtures__/workspace/turbo.json
new file mode 100644
index 0000000..8079eb2
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__fixtures__/workspace/turbo.json
@@ -0,0 +1,34 @@
+{
+  "$schema": "https://turbo.build/schema.json",
+  "globalEnv": ["UNORDERED", "CI"],
+  "pipeline": {
+    "build": {
+      // A workspace's `build` task depends on that workspace's
+      // topological dependencies' and devDependencies'
+      // `build` tasks  being completed first. The `^` symbol
+      // indicates an upstream dependency.
+      "dependsOn": ["^build"]
+    },
+    "test": {
+      // A workspace's `test` task depends on that workspace's
+      // own `build` task being completed first.
+      "dependsOn": ["build"],
+      "outputs": [],
+      // A workspace's `test` task should only be rerun when
+      // either a `.tsx` or `.ts` file has changed.
+      "inputs": ["src/**/*.tsx", "src/**/*.ts", "test/**/*.ts", "test/**/*.tsx"]
+    },
+    "lint": {
+      // A workspace's `lint` task has no dependencies and
+      // can be run whenever.
+      "outputs": []
+    },
+    "deploy": {
+      // A workspace's `deploy` task depends on the `build`,
+      // `test`, and `lint` tasks of the same workspace
+      // being completed.
+      "dependsOn": ["build", "test", "lint"],
+      "outputs": []
+    }
+  }
+}
diff --git a/packages/eslint-plugin-turbo/__tests__/cwd.test.ts b/packages/eslint-plugin-turbo/__tests__/cwd.test.ts
new file mode 100644
index 0000000..15a2695
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__tests__/cwd.test.ts
@@ -0,0 +1,88 @@
+import path from "path";
+import JSON5 from "json5";
+import { execSync } from "child_process";
+import { Schema } from "@turbo/types";
+import { setupTestFixtures } from "@turbo/test-utils";
+
+describe("eslint settings check", () => {
+  const { useFixture } = setupTestFixtures({
+    directory: path.join(__dirname, "../"),
+  });
+
+  it("does the right thing for peers", () => {
+    const { root: cwd } = useFixture({ fixture: "workspace" });
+    execSync(`npm install`, { cwd });
+
+    const configString = execSync(`eslint --print-config peer.js`, {
+      cwd,
+      encoding: "utf8",
+    });
+    const configJson = JSON5.parse(configString);
+
+    expect(configJson.settings).toEqual({
+      turbo: { envVars: ["CI", "UNORDERED"] },
+    });
+  });
+
+  it("does the right thing for child dirs", () => {
+    const { root } = useFixture({ fixture: "workspace" });
+    execSync(`npm install`, { cwd: root });
+
+    const cwd = path.join(root, "child");
+    const configString = execSync(`eslint --print-config child.js`, {
+      cwd,
+      encoding: "utf8",
+    });
+    const configJson = JSON5.parse(configString);
+
+    expect(configJson.settings).toEqual({
+      turbo: { envVars: ["CI", "UNORDERED"] },
+    });
+  });
+});
+
+describe("eslint cache is busted", () => {
+  const { useFixture } = setupTestFixtures({
+    directory: path.join(__dirname, "../"),
+  });
+
+  it("catches a lint error after changing config", () => {
+    expect.assertions(2);
+
+    // ensure that we populate the cache with a failure.
+    const { root, readJson, write } = useFixture({ fixture: "workspace" });
+    execSync(`npm install`, { cwd: root });
+
+    const cwd = path.join(root, "child");
+    try {
+      execSync(`eslint --format=json child.js`, { cwd, encoding: "utf8" });
+    } catch (error: any) {
+      const outputJson = JSON5.parse(error.stdout);
+      expect(outputJson).toMatchObject([
+        {
+          messages: [
+            {
+              message:
+                "NONEXISTENT is not listed as a dependency in turbo.json",
+            },
+          ],
+        },
+      ]);
+    }
+
+    // change the configuration
+    const turboJson = readJson<Schema>("turbo.json");
+    if (turboJson && "globalEnv" in turboJson) {
+      turboJson.globalEnv = ["CI", "NONEXISTENT"];
+      write("turbo.json", JSON5.stringify(turboJson, null, 2));
+    }
+
+    // test that we invalidated the eslint cache
+    const output = execSync(`eslint --format=json child.js`, {
+      cwd,
+      encoding: "utf8",
+    });
+    const outputJson = JSON5.parse(output);
+    expect(outputJson).toMatchObject([{ errorCount: 0 }]);
+  });
+});
diff --git a/packages/eslint-plugin-turbo/__tests__/lib/no-undeclared-env-vars.test.ts b/packages/eslint-plugin-turbo/__tests__/lib/no-undeclared-env-vars.test.ts
new file mode 100644
index 0000000..5c753dd
--- /dev/null
+++ b/packages/eslint-plugin-turbo/__tests__/lib/no-undeclared-env-vars.test.ts
@@ -0,0 +1,433 @@
+import { RULES } from "../../lib/constants";
+import rule from "../../lib/rules/no-undeclared-env-vars";
+import { RuleTester } from "eslint";
+import path from "path";
+
+const ruleTester = new RuleTester({
+  parserOptions: { ecmaVersion: 2020 },
+});
+
+ruleTester.run(RULES.noUndeclaredEnvVars, rule, {
+  valid: [
+    {
+      code: `
+        const { ENV_2 } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/workspace-configs") },
+      ],
+      filename: path.join(
+        __dirname,
+        "../../__fixtures__/workspace-configs/apps/web/index.js"
+      ),
+    },
+    {
+      code: `
+        const { ENV_1 } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/workspace-configs") },
+      ],
+      filename: path.join(
+        __dirname,
+        "../../__fixtures__/workspace-configs/apps/web/index.js"
+      ),
+    },
+    {
+      code: `
+        const { ENV_1 } = process.env;
+      `,
+      options: [{ cwd: "/some/random/path" }],
+    },
+    {
+      code: `
+        const { CI } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/workspace-configs") },
+      ],
+      filename: path.join(
+        __dirname,
+        "../../__fixtures__/workspace-configs/apps/web/index.js"
+      ),
+    },
+    {
+      code: `
+        const { TASK_ENV_KEY, ANOTHER_ENV_KEY } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: `
+        const { NEW_STYLE_ENV_KEY, TASK_ENV_KEY } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: `
+        const { NEW_STYLE_GLOBAL_ENV_KEY, TASK_ENV_KEY } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: `
+        const val = process.env["NEW_STYLE_GLOBAL_ENV_KEY"];
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: `
+        const { TASK_ENV_KEY, ANOTHER_ENV_KEY } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: `
+        const x = process.env.GLOBAL_ENV_KEY;
+        const { TASK_ENV_KEY, GLOBAL_ENV_KEY: renamedX } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: "var x = process.env.GLOBAL_ENV_KEY;",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: "let x = process.env.TASK_ENV_KEY;",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: "const x = process.env.ANOTHER_KEY_VALUE;",
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ANOTHER_KEY_[A-Z]+$"],
+        },
+      ],
+    },
+    {
+      code: `
+        var x = process.env.ENV_VAR_ONE;
+        var y = process.env.ENV_VAR_TWO;
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ENV_VAR_[A-Z]+$"],
+        },
+      ],
+    },
+    {
+      code: `
+        var x = process.env.ENV_VAR_ONE;
+        var y = process.env.ENV_VAR_TWO;
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ENV_VAR_O[A-Z]+$", "ENV_VAR_TWO"],
+        },
+      ],
+    },
+    {
+      code: `
+        var globalOrTask = process.env.TASK_ENV_KEY || process.env.GLOBAL_ENV_KEY;
+        var oneOrTwo = process.env.ENV_VAR_ONE || process.env.ENV_VAR_TWO;
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ENV_VAR_[A-Z]+$"],
+        },
+      ],
+    },
+    {
+      code: `
+        () => { return process.env.GLOBAL_ENV_KEY }
+        () => { return process.env.TASK_ENV_KEY }
+        () => { return process.env.ENV_VAR_ALLOWED }
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ENV_VAR_[A-Z]+$"],
+        },
+      ],
+    },
+    {
+      code: `
+        var foo = process?.env.GLOBAL_ENV_KEY
+        var foo = process?.env.TASK_ENV_KEY
+        var foo = process?.env.ENV_VAR_ALLOWED
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ENV_VAR_[A-Z]+$"],
+        },
+      ],
+    },
+    {
+      code: `
+        function test(arg1 = process.env.GLOBAL_ENV_KEY) {};
+        function test(arg1 = process.env.TASK_ENV_KEY) {};
+        function test(arg1 = process.env.ENV_VAR_ALLOWED) {};
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ENV_VAR_[A-Z]+$"],
+        },
+      ],
+    },
+    {
+      code: `
+        (arg1 = process.env.GLOBAL_ENV_KEY) => {}
+        (arg1 = process.env.TASK_ENV_KEY) => {}
+        (arg1 = process.env.ENV_VAR_ALLOWED) => {}
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ENV_VAR_[A-Z]+$"],
+        },
+      ],
+    },
+    {
+      code: "const getEnv = (key) => process.env[key];",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: "function getEnv(key) { return process.env[key]; }",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+    {
+      code: "for (let x of ['ONE', 'TWO', 'THREE']) { console.log(process.env[x]); }",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+    },
+  ],
+
+  invalid: [
+    {
+      code: `
+        const { ENV_2 } = process.env;
+      `,
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/workspace-configs") },
+      ],
+      filename: path.join(
+        __dirname,
+        "../../__fixtures__/workspace-configs/apps/docs/index.js"
+      ),
+      errors: [
+        {
+          message:
+            "ENV_2 is not listed as a dependency in the root turbo.json or workspace (apps/docs) turbo.json",
+        },
+      ],
+    },
+    {
+      code: "let { X } = process.env;",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+      errors: [{ message: "X is not listed as a dependency in turbo.json" }],
+    },
+    {
+      code: "const { X, Y, Z } = process.env;",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+      errors: [
+        { message: "X is not listed as a dependency in turbo.json" },
+        { message: "Y is not listed as a dependency in turbo.json" },
+        { message: "Z is not listed as a dependency in turbo.json" },
+      ],
+    },
+    {
+      code: "const { X, Y: NewName, Z } = process.env;",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+      errors: [
+        { message: "X is not listed as a dependency in turbo.json" },
+        { message: "Y is not listed as a dependency in turbo.json" },
+        { message: "Z is not listed as a dependency in turbo.json" },
+      ],
+    },
+    {
+      code: "var x = process.env.NOT_THERE;",
+      options: [
+        { cwd: path.join(__dirname, "../../__fixtures__/configs/single") },
+      ],
+      errors: [
+        {
+          message: "NOT_THERE is not listed as a dependency in turbo.json",
+        },
+      ],
+    },
+    {
+      code: "var x = process.env.KEY;",
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+          allowList: ["^ANOTHER_KEY_[A-Z]+$"],
+        },
+      ],
+      errors: [{ message: "KEY is not listed as a dependency in turbo.json" }],
+    },
+    {
+      code: `
+        var globalOrTask = process.env.TASK_ENV_KEY_NEW || process.env.GLOBAL_ENV_KEY_NEW;
+        var oneOrTwo = process.env.ENV_VAR_ONE || process.env.ENV_VAR_TWO;
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+        },
+      ],
+      errors: [
+        {
+          message:
+            "TASK_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "GLOBAL_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message: "ENV_VAR_ONE is not listed as a dependency in turbo.json",
+        },
+        {
+          message: "ENV_VAR_TWO is not listed as a dependency in turbo.json",
+        },
+      ],
+    },
+    {
+      code: `
+        () => { return process.env.GLOBAL_ENV_KEY_NEW }
+        () => { return process.env.TASK_ENV_KEY_NEW }
+        () => { return process.env.ENV_VAR_NOT_ALLOWED }
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+        },
+      ],
+      errors: [
+        {
+          message:
+            "GLOBAL_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "TASK_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "ENV_VAR_NOT_ALLOWED is not listed as a dependency in turbo.json",
+        },
+      ],
+    },
+    {
+      code: `
+        var foo = process?.env.GLOBAL_ENV_KEY_NEW
+        var foo = process?.env.TASK_ENV_KEY_NEW
+        var foo = process?.env.ENV_VAR_NOT_ALLOWED
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+        },
+      ],
+      errors: [
+        {
+          message:
+            "GLOBAL_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "TASK_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "ENV_VAR_NOT_ALLOWED is not listed as a dependency in turbo.json",
+        },
+      ],
+    },
+    {
+      code: `
+        function test(arg1 = process.env.GLOBAL_ENV_KEY_NEW) {};
+        function test(arg1 = process.env.TASK_ENV_KEY_NEW) {};
+        function test(arg1 = process.env.ENV_VAR_NOT_ALLOWED) {};
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+        },
+      ],
+      errors: [
+        {
+          message:
+            "GLOBAL_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "TASK_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "ENV_VAR_NOT_ALLOWED is not listed as a dependency in turbo.json",
+        },
+      ],
+    },
+    {
+      code: `
+        (arg1 = process.env.GLOBAL_ENV_KEY_NEW) => {}
+        (arg1 = process.env.TASK_ENV_KEY_NEW) => {}
+        (arg1 = process.env.ENV_VAR_NOT_ALLOWED) => {}
+      `,
+      options: [
+        {
+          cwd: path.join(__dirname, "../../__fixtures__/configs/single"),
+        },
+      ],
+      errors: [
+        {
+          message:
+            "GLOBAL_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "TASK_ENV_KEY_NEW is not listed as a dependency in turbo.json",
+        },
+        {
+          message:
+            "ENV_VAR_NOT_ALLOWED is not listed as a dependency in turbo.json",
+        },
+      ],
+    },
+  ],
+});
diff --git a/packages/eslint-plugin-turbo/docs/rules/no-undeclared-env-vars.md b/packages/eslint-plugin-turbo/docs/rules/no-undeclared-env-vars.md
new file mode 100644
index 0000000..049d7af
--- /dev/null
+++ b/packages/eslint-plugin-turbo/docs/rules/no-undeclared-env-vars.md
@@ -0,0 +1,74 @@
+# Ensure all environment variables are correctly included in cache keys (`no-undeclared-env-vars`)
+
+Ensures that all detectable usage of environment variables are correctly included in cache keys. This ensures build outputs remain correctly cacheable across environments.
+
+## Rule Details
+
+This rule aims to prevent users from forgetting to include an environment variable in their `turbo.json` configuration.
+
+The following examples assume the following code:
+
+```js
+const client = MyAPI({ token: process.env.MY_API_TOKEN });
+```
+
+Examples of **incorrect** code for this rule:
+
+```json
+{
+  "pipeline": {
+    "build": {
+      "dependsOn": ["^build"],
+      "outputs": ["dist/**", ".next/**", "!.next/cache/**"]
+    },
+    "lint": {},
+    "dev": {
+      "cache": false
+    }
+  }
+}
+```
+
+Examples of **correct** code for this rule:
+
+```json
+{
+  "globalEnv": ["MY_API_TOKEN"],
+  "pipeline": {
+    "build": {
+      "dependsOn": ["^build"],
+      "outputs": ["dist/**", ".next/**", "!.next/cache/**"]
+    },
+    "lint": {},
+    "dev": {
+      "cache": false
+    }
+  }
+}
+```
+
+```json
+{
+  "pipeline": {
+    "build": {
+      "dependsOn": ["^build"],
+      "env": ["MY_API_TOKEN"],
+      "outputs": ["dist/**", ".next/**", "!.next/cache/**"]
+    },
+    "lint": {},
+    "dev": {
+      "cache": false
+    }
+  }
+}
+```
+
+## Options
+
+| Option      | Required | Default | Details                                                                                                                                     | Example                                      |
+| ----------- | -------- | ------- | ------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------- |
+| `allowList` | No       | []      | An array of strings (or regular expressions) to exclude. NOTE: an env variable should only be excluded if it has no effect on build outputs | `["MY_API_TOKEN", "^MY_ENV_PREFIX_[A-Z]+$"]` |
+
+## Further Reading
+
+- [Altering Caching Based on Environment Variables](https://turbo.build/repo/docs/core-concepts/caching#altering-caching-based-on-environment-variables)
diff --git a/packages/eslint-plugin-turbo/jest.config.js b/packages/eslint-plugin-turbo/jest.config.js
new file mode 100644
index 0000000..102773e
--- /dev/null
+++ b/packages/eslint-plugin-turbo/jest.config.js
@@ -0,0 +1,12 @@
+/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
+module.exports = {
+  roots: ["<rootDir>"],
+  transform: {
+    "^.+\\.tsx?$": "ts-jest",
+  },
+  testPathIgnorePatterns: ["/__fixtures__/"],
+  coveragePathIgnorePatterns: ["/__fixtures__/"],
+  moduleFileExtensions: ["ts", "tsx", "js", "jsx", "json", "node"],
+  modulePathIgnorePatterns: ["<rootDir>/node_modules", "<rootDir>/dist"],
+  preset: "ts-jest",
+};
diff --git a/packages/eslint-plugin-turbo/lib/configs/recommended.ts b/packages/eslint-plugin-turbo/lib/configs/recommended.ts
new file mode 100644
index 0000000..e247503
--- /dev/null
+++ b/packages/eslint-plugin-turbo/lib/configs/recommended.ts
@@ -0,0 +1,26 @@
+import { RULES } from "../constants";
+import getEnvVarDependencies from "../utils/getEnvVarDependencies";
+
+// Add the environment variables into the ESLint incremental cache key.
+const envVars = getEnvVarDependencies({
+  cwd: process.cwd(),
+});
+const settings = {
+  turbo: {
+    envVars: envVars
+      ? Object.values(envVars)
+          .flatMap((s) => Array.from(s))
+          .sort()
+      : [],
+  },
+};
+
+const config = {
+  settings,
+  plugins: ["turbo"],
+  rules: {
+    [`turbo/${RULES.noUndeclaredEnvVars}`]: "error",
+  },
+};
+
+export default config;
diff --git a/packages/eslint-plugin-turbo/lib/constants.ts b/packages/eslint-plugin-turbo/lib/constants.ts
new file mode 100644
index 0000000..5af2e6f
--- /dev/null
+++ b/packages/eslint-plugin-turbo/lib/constants.ts
@@ -0,0 +1,5 @@
+const RULES = {
+  noUndeclaredEnvVars: `no-undeclared-env-vars`,
+};
+
+export { RULES };
diff --git a/packages/eslint-plugin-turbo/lib/index.ts b/packages/eslint-plugin-turbo/lib/index.ts
new file mode 100644
index 0000000..e7f113c
--- /dev/null
+++ b/packages/eslint-plugin-turbo/lib/index.ts
@@ -0,0 +1,17 @@
+import { RULES } from "./constants";
+
+// rules
+import noUndeclaredEnvVars from "./rules/no-undeclared-env-vars";
+
+// configs
+import recommended from "./configs/recommended";
+
+const rules = {
+  [RULES.noUndeclaredEnvVars]: noUndeclaredEnvVars,
+};
+
+const configs = {
+  recommended,
+};
+
+export { rules, configs };
diff --git a/packages/eslint-plugin-turbo/lib/rules/no-undeclared-env-vars.ts b/packages/eslint-plugin-turbo/lib/rules/no-undeclared-env-vars.ts
new file mode 100644
index 0000000..372d21a
--- /dev/null
+++ b/packages/eslint-plugin-turbo/lib/rules/no-undeclared-env-vars.ts
@@ -0,0 +1,187 @@
+import type { Rule } from "eslint";
+import path from "path";
+import { Node, MemberExpression } from "estree";
+import { RULES } from "../constants";
+import getEnvVarDependencies from "../utils/getEnvVarDependencies";
+
+const meta: Rule.RuleMetaData = {
+  type: "problem",
+  docs: {
+    description:
+      "Do not allow the use of `process.env` without including the env key in any turbo.json",
+    category: "Configuration Issues",
+    recommended: true,
+    url: `https://github.com/vercel/turbo/tree/main/packages/eslint-plugin-turbo/docs/rules/${RULES.noUndeclaredEnvVars}.md`,
+  },
+  schema: [
+    {
+      type: "object",
+      default: {},
+      additionalProperties: false,
+      properties: {
+        // override cwd, primarily exposed for easier testing
+        cwd: {
+          require: false,
+          type: "string",
+        },
+        allowList: {
+          default: [],
+          type: "array",
+          items: {
+            type: "string",
+          },
+        },
+      },
+    },
+  ],
+};
+
+/**
+ * Normalize the value of the cwd
+ * Extracted from eslint
+ * SPDX-License-Identifier: MIT
+ */
+function normalizeCwd(
+  cwd: string | undefined,
+  options: Array<any>
+): string | undefined {
+  if (options?.[0]?.cwd) {
+    return options[0].cwd;
+  }
+
+  if (cwd) {
+    return cwd;
+  }
+  if (typeof process === "object") {
+    return process.cwd();
+  }
+
+  return undefined;
+}
+
+function create(context: Rule.RuleContext): Rule.RuleListener {
+  const { options, getPhysicalFilename } = context;
+  const allowList: Array<string> = options?.[0]?.allowList || [];
+  const regexAllowList: Array<RegExp> = [];
+  allowList.forEach((allowed) => {
+    try {
+      regexAllowList.push(new RegExp(allowed));
+    } catch (err) {
+      // log the error, but just move on without this allowList entry
+      console.error(`Unable to convert "${allowed}" to regex`);
+    }
+  });
+
+  const cwd = normalizeCwd(
+    context.getCwd ? context.getCwd() : undefined,
+    options
+  );
+  const filePath = getPhysicalFilename();
+  const allTurboVars = getEnvVarDependencies({
+    cwd,
+  });
+
+  // if allTurboVars is null, something went wrong reading from the turbo config
+  // (this is different from finding a config with no env vars present, which would
+  // return an empty set) - so there is no point continuing if we have nothing to check against
+  if (!allTurboVars) {
+    // return of {} bails early from a rule check
+    return {};
+  }
+
+  const globalTurboVars = allTurboVars["//"];
+  const hasWorkspaceConfigs = Object.keys(allTurboVars).length > 1;
+
+  // find any workspace configs that match the current file path
+  // find workspace config (if any) that match the current file path
+  const workspaceKey = Object.keys(allTurboVars).find(
+    (workspacePath) => filePath !== "//" && filePath.startsWith(workspacePath)
+  );
+
+  let workspaceTurboVars: Set<string> | null = null;
+  if (workspaceKey) {
+    workspaceTurboVars = allTurboVars[workspaceKey];
+  }
+
+  const checkKey = (node: Node, envKey?: string) => {
+    if (
+      envKey &&
+      !globalTurboVars.has(envKey) &&
+      !regexAllowList.some((regex) => regex.test(envKey))
+    ) {
+      // if we have a workspace config, check that too
+      if (workspaceTurboVars && workspaceTurboVars.has(envKey)) {
+        return {};
+      } else {
+        let message = `{{ envKey }} is not listed as a dependency in ${
+          hasWorkspaceConfigs ? "root turbo.json" : "turbo.json"
+        }`;
+        if (workspaceKey && workspaceTurboVars) {
+          if (cwd) {
+            // if we have a cwd, we can provide a relative path to the workspace config
+            message = `{{ envKey }} is not listed as a dependency in the root turbo.json or workspace (${path.relative(
+              cwd,
+              workspaceKey
+            )}) turbo.json`;
+          } else {
+            message = `{{ envKey }} is not listed as a dependency in the root turbo.json or workspace turbo.json`;
+          }
+        }
+
+        context.report({
+          node,
+          message,
+          data: { envKey },
+        });
+      }
+    }
+  };
+
+  const isComputed = (
+    node: MemberExpression & Rule.NodeParentExtension
+  ): boolean => {
+    if ("computed" in node.parent) {
+      return node.parent.computed;
+    }
+
+    return false;
+  };
+
+  return {
+    MemberExpression(node) {
+      // we only care about complete process env declarations and non-computed keys
+      if (
+        "name" in node.object &&
+        "name" in node.property &&
+        !isComputed(node)
+      ) {
+        const objectName = node.object.name;
+        const propertyName = node.property.name;
+
+        // we're doing something with process.env
+        if (objectName === "process" && propertyName === "env") {
+          // destructuring from process.env
+          if ("id" in node.parent && node.parent.id?.type === "ObjectPattern") {
+            const values = node.parent.id.properties.values();
+            Array.from(values).forEach((item) => {
+              if ("key" in item && "name" in item.key) {
+                checkKey(node.parent, item.key.name);
+              }
+            });
+          }
+
+          // accessing key on process.env
+          else if (
+            "property" in node.parent &&
+            "name" in node.parent.property
+          ) {
+            checkKey(node.parent, node.parent.property?.name);
+          }
+        }
+      }
+    },
+  };
+}
+
+const rule = { create, meta };
+export default rule;
diff --git a/packages/eslint-plugin-turbo/lib/utils/getEnvVarDependencies.ts b/packages/eslint-plugin-turbo/lib/utils/getEnvVarDependencies.ts
new file mode 100644
index 0000000..a57e5eb
--- /dev/null
+++ b/packages/eslint-plugin-turbo/lib/utils/getEnvVarDependencies.ts
@@ -0,0 +1,75 @@
+import { getTurboConfigs } from "@turbo/utils";
+
+function findDependsOnEnvVars({
+  dependencies,
+}: {
+  dependencies?: Array<string>;
+}) {
+  if (dependencies) {
+    return (
+      dependencies
+        // filter for dep env vars
+        .filter((dep) => dep.startsWith("$"))
+        // remove leading $
+        .map((envVar) => envVar.slice(1, envVar.length))
+    );
+  }
+
+  return [];
+}
+
+function getEnvVarDependencies({
+  cwd,
+}: {
+  cwd: string | undefined;
+}): Record<string, Set<string>> | null {
+  const turboConfigs = getTurboConfigs(cwd);
+
+  if (!turboConfigs.length) {
+    return null;
+  }
+
+  const envVars: Record<string, Set<string>> = {
+    "//": new Set(),
+  };
+
+  turboConfigs.forEach((turboConfig) => {
+    const { config, workspacePath, isRootConfig } = turboConfig;
+
+    const key = isRootConfig ? "//" : workspacePath;
+    if (!envVars[key]) {
+      envVars[key] = new Set();
+    }
+
+    // handle globals
+    if (!("extends" in config)) {
+      const { globalDependencies = [], globalEnv = [] } = config;
+
+      const keys = [
+        ...findDependsOnEnvVars({
+          dependencies: globalDependencies,
+        }),
+        ...globalEnv,
+      ];
+      keys.forEach((k) => envVars[key].add(k));
+    }
+
+    // handle pipelines
+    const { pipeline = {} } = config;
+    Object.values(pipeline).forEach(({ env, dependsOn }) => {
+      if (dependsOn) {
+        findDependsOnEnvVars({ dependencies: dependsOn }).forEach((k) =>
+          envVars[key].add(k)
+        );
+      }
+
+      if (env) {
+        env.forEach((k) => envVars[key].add(k));
+      }
+    });
+  });
+
+  return envVars;
+}
+
+export default getEnvVarDependencies;
diff --git a/packages/eslint-plugin-turbo/package.json b/packages/eslint-plugin-turbo/package.json
new file mode 100644
index 0000000..d19eef2
--- /dev/null
+++ b/packages/eslint-plugin-turbo/package.json
@@ -0,0 +1,51 @@
+{
+  "name": "eslint-plugin-turbo",
+  "version": "1.9.4-canary.2",
+  "description": "ESLint plugin for Turborepo",
+  "keywords": [
+    "turbo",
+    "eslint",
+    "turborepo",
+    "eslintplugin",
+    "eslint-plugin"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vercel/turbo",
+    "directory": "packages/eslint-plugin-turbo"
+  },
+  "bugs": {
+    "url": "https://github.com/vercel/turbo/issues"
+  },
+  "author": "Vercel",
+  "main": "./dist/index.js",
+  "files": [
+    "dist/**"
+  ],
+  "scripts": {
+    "release": "pnpm build && pnpm publish",
+    "test": "jest",
+    "build": "tsup",
+    "check-types": "tsc --noEmit",
+    "lint": "eslint lib/**/*.ts"
+  },
+  "devDependencies": {
+    "@types/eslint": "^8.4.5",
+    "@types/estree": "^1.0.0",
+    "@types/jest": "^27.4.0",
+    "@types/node": "^16.11.12",
+    "jest": "^27.4.3",
+    "json5": "^2.2.1",
+    "ts-jest": "^27.1.1",
+    "@turbo/tsconfig": "workspace:*",
+    "tsup": "^6.2.0",
+    "@turbo/test-utils": "workspace:*",
+    "@turbo/types": "workspace:*",
+    "@turbo/utils": "workspace:*",
+    "typescript": "^4.7.4"
+  },
+  "peerDependencies": {
+    "eslint": ">6.6.0"
+  },
+  "license": "MPL-2.0"
+}
diff --git a/packages/eslint-plugin-turbo/tsconfig.json b/packages/eslint-plugin-turbo/tsconfig.json
new file mode 100644
index 0000000..0620a3c
--- /dev/null
+++ b/packages/eslint-plugin-turbo/tsconfig.json
@@ -0,0 +1,6 @@
+{
+  "extends": "@turbo/tsconfig/library.json",
+  "compilerOptions": {
+    "rootDir": "."
+  }
+}
diff --git a/packages/eslint-plugin-turbo/tsup.config.ts b/packages/eslint-plugin-turbo/tsup.config.ts
new file mode 100644
index 0000000..bbda8cb
--- /dev/null
+++ b/packages/eslint-plugin-turbo/tsup.config.ts
@@ -0,0 +1,8 @@
+import { defineConfig, Options } from "tsup";
+
+export default defineConfig((options: Options) => ({
+  entry: ["lib/index.ts"],
+  clean: true,
+  minify: true,
+  ...options,
+}));
diff --git a/packages/eslint-plugin-turbo/turbo.json b/packages/eslint-plugin-turbo/turbo.json
new file mode 100644
index 0000000..f86a4db
--- /dev/null
+++ b/packages/eslint-plugin-turbo/turbo.json
@@ -0,0 +1,9 @@
+{
+  "$schema": "../../docs/public/schema.json",
+  "extends": ["//"],
+  "pipeline": {
+    "test": {
+      "dependsOn": ["build"]
+    }
+  }
+}