fix processKeepAlive disabled performance regression

[ericallam]

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Latest commit: 6b20f3e

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Walkthrough

The changes update the process and environment management within the RunExecution class in the execution.ts file. The prepareForExecution method now explicitly sets the task run environment before process creation, ensuring the environment is available earlier in the execution flow. In the executeRun method, the logic for acquiring a task run process is altered to reuse an existing process if it is not being terminated; otherwise, a new process is obtained. Debug logging is added to clarify whether a new or existing process is used. The method signatures remain unchanged, but their internal behaviors are modified.

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Reviewing files that changed from the base of the PR and between b7134dd and 6b20f3e.

📒 Files selected for processing (1)

• packages/cli-v3/src/entryPoints/managed/execution.ts (2 hunks)

🧰 Additional context used

📓 Path-based instructions (1)

`**/*.{ts,tsx}`: Always prefer using isomorphic code like fetch, ReadableStream,...

**/*.{ts,tsx}: Always prefer using isomorphic code like fetch, ReadableStream, etc. instead of Node.js specific code
For TypeScript, we usually use types over interfaces
Avoid enums
Use strict mode
No default exports, use function declarations

📄 Source: CodeRabbit Inference Engine (.github/copilot-instructions.md)

List of files the instruction was applied to:

• packages/cli-v3/src/entryPoints/managed/execution.ts

🧠 Learnings (2)

📓 Common learnings

Learnt from: nicktrn
PR: triggerdotdev/trigger.dev#1418
File: packages/core/src/v3/errors.ts:364-371
Timestamp: 2024-10-18T15:41:52.352Z
Learning: In `packages/core/src/v3/errors.ts`, within the `taskRunErrorEnhancer` function, `error.message` is always defined, so it's safe to directly call `error.message.includes("SIGTERM")` without additional checks.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : Use the `runs` and `tasks` APIs from `@trigger.dev/sdk/v3` to subscribe to run updates and implement realtime features.

Learnt from: nicktrn
PR: triggerdotdev/trigger.dev#1387
File: packages/cli-v3/src/executions/taskRunProcess.ts:408-413
Timestamp: 2024-10-12T01:08:24.066Z
Learning: In the `parseExecuteError` method in `packages/cli-v3/src/executions/taskRunProcess.ts`, using `String(error)` to populate the `message` field works fine and even prepends `error.name`.

Learnt from: nicktrn
PR: triggerdotdev/trigger.dev#1387
File: packages/cli-v3/src/executions/taskRunProcess.ts:408-413
Timestamp: 2024-10-07T10:32:30.100Z
Learning: In the `parseExecuteError` method in `packages/cli-v3/src/executions/taskRunProcess.ts`, using `String(error)` to populate the `message` field works fine and even prepends `error.name`.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : The `run` function must contain the main logic for each Trigger.dev task.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/webapp.mdc:0-0
Timestamp: 2025-06-30T13:21:59.413Z
Learning: Applies to apps/webapp/**/*.ts : In the webapp, all environment variables must be accessed through the `env` export of `env.server.ts`, instead of directly accessing `process.env`.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : When triggering a task from inside another task, use the task instance's `trigger`, `batchTrigger`, `triggerAndWait`, `batchTriggerAndWait`, `batch.trigger`, `batch.triggerAndWait`, `batch.triggerByTask`, or `batch.triggerByTaskAndWait` methods.

packages/cli-v3/src/entryPoints/managed/execution.ts (10)

Learnt from: nicktrn
PR: triggerdotdev/trigger.dev#1418
File: packages/core/src/v3/errors.ts:364-371
Timestamp: 2024-10-18T15:41:52.352Z
Learning: In `packages/core/src/v3/errors.ts`, within the `taskRunErrorEnhancer` function, `error.message` is always defined, so it's safe to directly call `error.message.includes("SIGTERM")` without additional checks.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : The `run` function must contain the main logic for each Trigger.dev task.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : When triggering a task from backend code, use `tasks.trigger`, `tasks.batchTrigger`, or `tasks.triggerAndPoll` from `@trigger.dev/sdk/v3` and set the `TRIGGER_SECRET_KEY` environment variable.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : Use the `runs` and `tasks` APIs from `@trigger.dev/sdk/v3` to subscribe to run updates and implement realtime features.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : When triggering a task from inside another task, use the task instance's `trigger`, `batchTrigger`, `triggerAndWait`, `batchTriggerAndWait`, `batch.trigger`, `batch.triggerAndWait`, `batch.triggerByTask`, or `batch.triggerByTaskAndWait` methods.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : When using retry, queue, machine, or maxDuration options, configure them within the `task` function in Trigger.dev task files.

Learnt from: nicktrn
PR: triggerdotdev/trigger.dev#1387
File: packages/cli-v3/src/executions/taskRunProcess.ts:408-413
Timestamp: 2024-10-12T01:08:24.066Z
Learning: In the `parseExecuteError` method in `packages/cli-v3/src/executions/taskRunProcess.ts`, using `String(error)` to populate the `message` field works fine and even prepends `error.name`.

Learnt from: nicktrn
PR: triggerdotdev/trigger.dev#1387
File: packages/cli-v3/src/executions/taskRunProcess.ts:408-413
Timestamp: 2024-10-07T10:32:30.100Z
Learning: In the `parseExecuteError` method in `packages/cli-v3/src/executions/taskRunProcess.ts`, using `String(error)` to populate the `message` field works fine and even prepends `error.name`.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : Use the `metadata` API from `@trigger.dev/sdk/v3` to attach, update, and access structured metadata within task runs.

Learnt from: CR
PR: triggerdotdev/trigger.dev#0
File: .cursor/rules/writing-tasks.mdc:0-0
Timestamp: 2025-06-30T13:22:21.495Z
Learning: Applies to **/trigger/**/*.{ts,tsx,js,jsx} : Scheduled tasks must use `schedules.task` from `@trigger.dev/sdk/v3` and define a `cron` property for declarative schedules.

⏰ Context from checks skipped due to timeout of 90000ms (25)

• GitHub Check: units / internal / 🧪 Unit Tests: Internal (6, 8)
• GitHub Check: e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (3, 10)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (4, 10)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (7, 10)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (6, 10)
• GitHub Check: units / internal / 🧪 Unit Tests: Internal (1, 8)
• GitHub Check: units / internal / 🧪 Unit Tests: Internal (7, 8)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (10, 10)
• GitHub Check: units / internal / 🧪 Unit Tests: Internal (4, 8)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (8, 10)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (9, 10)
• GitHub Check: units / internal / 🧪 Unit Tests: Internal (2, 8)
• GitHub Check: units / internal / 🧪 Unit Tests: Internal (3, 8)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (5, 10)
• GitHub Check: units / internal / 🧪 Unit Tests: Internal (5, 8)
• GitHub Check: units / internal / 🧪 Unit Tests: Internal (8, 8)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (1, 10)
• GitHub Check: units / webapp / 🧪 Unit Tests: Webapp (2, 10)
• GitHub Check: e2e / 🧪 CLI v3 tests (windows-latest - pnpm)
• GitHub Check: units / packages / 🧪 Unit Tests: Packages (1, 1)
• GitHub Check: e2e / 🧪 CLI v3 tests (windows-latest - npm)
• GitHub Check: e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)
• GitHub Check: typecheck / typecheck
• GitHub Check: Analyze (javascript-typescript)

🔇 Additional comments (2)

packages/cli-v3/src/entryPoints/managed/execution.ts (2)

148-149: LGTM: Fixes timing issue for canExecute.

Setting currentTaskRunEnv early ensures that the canExecute getter returns true, which is essential for process reuse optimization. This addresses the performance regression mentioned in the PR title.

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590-598: LGTM: Optimizes process reuse effectively.

The conditional logic properly implements process reuse by checking both existence and state (isBeingKilled). The debug logging provides good visibility into which execution path is taken, which will help with troubleshooting.

The implementation correctly avoids unnecessary process creation when a valid process is already available, addressing the performance regression.

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