feat: offer automatic Prisma ORM 8 CLI installation

[StevenMcClankerton]

Prompt users when a Prisma ORM 8 schema cannot start its language server because the workspace-local CLI is missing, and offer an automatic installation path.

Changes

• Show a persistent modal explaining that the CLI enables autocomplete, formatting, and error checking, with actions to install or continue without language features.
• Use package-manager-detector to select the workspace package manager and run prisma@latest installation as a visible VS Code task.
• Restart the language server only after successful installation. Show manual-install guidance on failure, without asking users to retry a restart.
• Add tests for detection, user choices, task lifecycle, trust checks, and restart behavior.

Why

A silent startup failure leaves users without editor assistance. An explicit install action keeps dependency changes opt-in, while task exit codes make automatic restart reliable.

Validation

• Type checking passed after rebasing onto main using the installed compiler: ./node_modules/.bin/tsc --noEmit -p packages/vscode/tsconfig.json.
• Targeted lint, formatting, and diff checks passed during development.
• 36 focused tests passed before the final modal change; the latest test run was blocked before execution by missing @rollup/rollup-linux-arm64-gnu.
• An earlier development build bundled the extension, then failed with EACCES while copying Studio static assets.
• After rebasing, the pnpm typecheck wrapper attempted a dependency reinstall and stopped with ERR_PNPM_ABORTED_REMOVE_MODULES_DIR_NO_TTY; the dependency tree was left intact.

[coderabbitai]

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Reviewing files that changed from the base of the PR and between 567bb26 and 47baaa0.

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• packages/vscode/src/plugins/prisma-language-server/installPrismaCli.ts

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Summary by CodeRabbit

• New Features
  • Automatically installs the Prisma ORM 8 CLI when it is missing from a trusted VS Code workspace.
  • Detects the workspace’s package manager and runs the appropriate installation command.
  • Shows options to install the CLI or continue without Prisma language features.
  • Restarts the Prisma language server after a successful installation.
• Bug Fixes
  • Improved handling and reporting of installation failures, unsupported package managers, and task errors.

Walkthrough

The VS Code extension now detects a supported package manager and installs prisma@latest through a background VS Code task. It handles installation results, workspace state, errors, and language-server restart. Language-server startup now checks for the Prisma ORM 8 CLI and offers installation or continuation when the CLI is missing. Tests cover detection, task events, failures, disposal, notifications, and startup behavior.

Priority: ⬇️ Low

Merge Risk: ⚪ Minimal · up to 47baa

The startup check admits the Prisma 8-style CLI entrypoint and excludes standard older Prisma CLIs, so no merge-blocking risk remains.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 20.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 5 functions across 4 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: offering automatic Prisma ORM 8 CLI installation.
Description check	✅ Passed	The description directly explains the missing-CLI prompt, package-manager detection, installation task, restart behavior, failure handling, and test coverage.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/prisma-orm-8-cli-install

✨ Simplify code

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• Commit simplified code in branch feat/prisma-orm-8-cli-install

---

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[coderabbitai]

Actionable comments posted: 2

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Inline comments:
In `@packages/vscode/src/plugins/prisma-language-server/installPrismaCli.ts`:
- Around line 105-107: Update the window.showErrorMessage call in the Prisma CLI
installation flow to follow the configured Prettier formatting, keeping this
112-character invocation on a single line.

In `@packages/vscode/src/plugins/prisma-language-server/prismaNextClients.ts`:
- Line 91: Update the Prisma client discovery flow around cliExists to validate
the installed workspace Prisma package’s major version before startup; treat any
major other than the supported Prisma 8 major as missing or incompatible so
installation guidance is shown. Add a test covering an existing older Prisma
package.

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ℹ️ Review info

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Configuration used: Organization UI

Review profile: ASSERTIVE

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Run ID: e3e4e974-6c80-4836-971d-95ca5151e2ba

📥 Commits

Reviewing files that changed from the base of the PR and between aa6c95d and 567bb26.

⛔ Files ignored due to path filters (1)

• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml

📒 Files selected for processing (5)

• packages/vscode/package.json
• packages/vscode/src/plugins/prisma-language-server/installPrismaCli.ts
• packages/vscode/src/plugins/prisma-language-server/prismaNextClients.ts
• packages/vscode/tests/__tests__/installPrismaCli.test.mjs
• packages/vscode/tests/__tests__/prismaNextClients.test.mjs

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