[#3023] Anchored environment variable prefixes forwarded by 'ahoy cli'.

[AlexSkrypnyk]

Closes #3023

Summary

ahoy cli forwards host environment variables into the container by filtering env output through a grep pattern of allowed prefixes, but the pattern wasn't anchored, so grep matched each token anywhere in a variable name rather than at its start. Any host variable that merely contained a token like TERM or DRUPAL_ got forwarded, not just the variables that actually started with it. We reproduced this live: MY_DRUPAL_SECRET, ITERM_PROFILE, TERM_PROGRAM, TERM_PROGRAM_VERSION, COLORTERM and ZED_TERM all crossed into the container despite none of them being an intended match. This PR anchors the pattern so only an exact TERM/LOCALDEV_URL match or a genuine COMPOSE_/GITHUB_/PACKAGE_/DOCKER_/DRUPAL_/VORTEX_/ENVIRONMENT_ prefix gets through.

The issue proposed an anchored basic regular expression (grep "^TERM$\|^COMPOSE_\|..."), but that form isn't portable: in a POSIX BRE, $ is only an anchor at the very end of the whole expression, so BSD grep (the one macOS ships) reads ^TERM$ as the literal string TERM$ and silently stops matching TERM on every macOS machine, while GNU grep and BusyBox grep both accept it as an anchor. We confirmed this against BSD grep 2.6.0-FreeBSD and BusyBox grep. Switching to an extended regular expression (grep -E) sidesteps the problem, since ^ and $ are anchors everywhere in an ERE and all three implementations agree.

Changes

• .ahoy.yml - both branches of the cli command (the docker compose exec ... bash -c form and the plain bash form) now filter through grep -E '^(TERM|LOCALDEV_URL)$|^(COMPOSE|GITHUB|PACKAGE|DOCKER|DRUPAL|VORTEX|ENVIRONMENT)_' instead of the unanchored BRE.
• .vortex/tests/phpunit/Traits/Subtests/SubtestAhoyTrait.php - subtestAhoyCli() gains 5 assertions covering both directions of the filter. Blocked: MY_DRUPAL_SECRET (an allowed prefix in the middle of the name), MY_LOCALDEV_URL (an allowed name as a suffix), and ITERM_PROFILE (contains TERM but isn't TERM). Forwarded: an exact TERM and an exact LOCALDEV_URL. Those last 2 are the regression guard for the BSD/GNU BRE anchoring trap described above - an over-eager anchoring fix would silently drop them, and nothing else in the suite would notice.
• .vortex/installer/tests/Fixtures/handler_process/_baseline/.ahoy.yml - regenerated installer snapshot picking up the .ahoy.yml fix, via ahoy update-snapshots.

The LOCALDEV_URL assertion is worth a note, because the container already gets a LOCALDEV_URL of its own from docker-compose.yml (derived from COMPOSE_PROJECT_NAME). The test forwards a distinctive host value and asserts on that value rather than on the variable merely being set, so the compose-provided one can't satisfy it.

Scope

The issue asks whether the same idiom appears elsewhere, so we swept for it. It doesn't:

• The CI env-forwarding calls in .circleci/config.yml, .circleci/vortex-test-common.yml and .github/workflows/build-test-deploy.yml use env | cut -f1 -d= | sed 's/^/-e /' with no grep at all - they forward everything on purpose, inside an ephemeral CI container.
• .lagoon.yml reads a value out of .env with a start-anchored grep. Different job, different trust boundary, already anchored where it matters.

One knock-on worth flagging: COLORTERM, TERM_PROGRAM and friends were only ever forwarded by accident, and they stop being forwarded now. Nothing in the repo reads them, and the container sets no TERM of its own, so this shouldn't be noticeable - but if truecolor detection inside the container ever matters, COLORTERM should be added to the allowlist deliberately rather than restored by accident.

Before / After

BEFORE - grep "TERM\|COMPOSE_\|GITHUB_\|PACKAGE_\|DOCKER_\|DRUPAL_\|VORTEX_\|ENVIRONMENT_\|LOCALDEV_URL$" matches a listed token anywhere in the variable name.

AFTER - grep -E '^(TERM|LOCALDEV_URL)$|^(COMPOSE|GITHUB|PACKAGE|DOCKER|DRUPAL|VORTEX|ENVIRONMENT)_' matches only an exact name or a genuine prefix.

                     host environment
                            │
                            ▼
              ┌─────────────────────────┐
              │  env | cut -f1 -d=      │
              │  grep <filter>          │
              │  sed 's/^/-e /'         │
              └─────────────────────────┘
                            │
                            ▼
                docker compose exec cli

┌──────────────────────┬──────────────┬─────────────┐
│ Host variable        │ BEFORE (BRE) │ AFTER (ERE) │
├──────────────────────┼──────────────┼─────────────┤
│ DRUPAL_SHIELD_PASS   │ forwarded    │ forwarded   │
│ TERM                 │ forwarded    │ forwarded   │
│ LOCALDEV_URL         │ forwarded    │ forwarded   │
├──────────────────────┼──────────────┼─────────────┤
│ MY_DRUPAL_SECRET     │ forwarded    │ blocked     │
│ COMPANY_GITHUB_TOKEN │ forwarded    │ blocked     │
│ MY_LOCALDEV_URL      │ forwarded    │ blocked     │
│ ITERM_PROFILE        │ forwarded    │ blocked     │
│ TERM_PROGRAM_VERSION │ forwarded    │ blocked     │
│ COLORTERM            │ forwarded    │ blocked     │
│ ZED_TERM             │ forwarded    │ blocked     │
└──────────────────────┴──────────────┴─────────────┘

The top 3 are meant to cross into the container and still do. Everything below the divider only ever matched by accident, because the old pattern had no start anchor.

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Review details

⚙️ Run configuration

Configuration used: Repository UI

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Run ID: 1180ed95-4ce2-4d8f-9f79-88c18d6390d8

📥 Commits

Reviewing files that changed from the base of the PR and between 479410b and ad40452.

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• .vortex/tests/phpunit/Traits/Subtests/SubtestAhoyTrait.php

Walkthrough

The CLI environment-variable filter now uses anchored matching for exact names and approved prefixes. PHPUnit coverage verifies rejection of embedded variable names and forwarding of exact TERM.

Changes

CLI environment filtering

Layer / File(s)	Summary
Anchored filter and regression tests .ahoy.yml, .vortex/tests/phpunit/Traits/Subtests/SubtestAhoyTrait.php	The CLI filter now anchors exact names and approved prefixes in command and shell modes. Tests reject unsupported embedded matches and confirm exact TERM forwarding.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🔵 Low · up to 47941

The change prevents unintended host variables from entering containers while preserving intended prefixes. The PR is mergeable with explicit owner awareness that an exact LOCALDEV_URL forwarding assertion should be added to prevent regressions in that contract.

Possibly related PRs

• drevops/vortex#2803: Both changes update CLI environment-variable filtering and related tests.
• drevops/vortex#2854: Both changes tighten name matching and add regression coverage.

Suggested labels: Needs review

Poem

A rabbit checks each variable name,
No hidden substring slips through the frame.
Exact TERM hops safely inside,
Stray names stay on the outside.
Anchors hold the CLI line—
Clean env paths, working fine! 🐇

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Linked Issues check	❓ Inconclusive	The main filter and tests meet issue #3023, but the excluded installer baseline cannot be verified.	Verify .vortex/installer/tests/Fixtures/handler_process/_baseline/.ahoy.yml, excluded by !.vortex/installer/tests/Fixtures/**, for the same anchored filter.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the anchored environment-variable prefix change in the ahoy cli command.
Out of Scope Changes check	✅ Passed	The configuration and test changes support the linked issue and do not introduce unrelated scope.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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🛠️ Fix failing CI checks 💡

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• Commit on current branch

📝 Generate docstrings

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• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/3023-anchor-env-prefixes

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Inline comments:
In @.vortex/tests/phpunit/Traits/Subtests/SubtestAhoyTrait.php:
- Around line 143-149: Add a positive assertion in the relevant Ahoy subtest
alongside the existing MY_LOCALDEV_URL rejection, invoking the same command
helper to verify that an exact LOCALDEV_URL environment variable is forwarded
and its value is returned. Preserve the current suffix-rejection assertion.

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📥 Commits

Reviewing files that changed from the base of the PR and between 32be59c and 479410b.

⛔ Files ignored due to path filters (1)

• .vortex/installer/tests/Fixtures/handler_process/_baseline/.ahoy.yml is excluded by !.vortex/installer/tests/Fixtures/**

📒 Files selected for processing (2)

• .ahoy.yml
• .vortex/tests/phpunit/Traits/Subtests/SubtestAhoyTrait.php

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.71%. Comparing base (32be59c) to head (ad40452).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3024      +/-   ##
==========================================
- Coverage   87.12%   86.71%   -0.41%     
==========================================
  Files         101       94       -7     
  Lines        4917     4758     -159     
  Branches       47        3      -44     
==========================================
- Hits         4284     4126     -158     
+ Misses        633      632       -1     

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Code coverage (threshold: 90%)

  Classes: 100.00% (1/1)
  Methods: 100.00% (2/2)
  Lines:   98.56% (206/209)

Per-class coverage

Drupal\ys_demo\Plugin\Block\CounterBlock
  Methods: 100.00% ( 2/ 2)   Lines: 100.00% ( 10/ 10)

[AlexSkrypnyk]

Code coverage (threshold: 90%)

  Classes: 100.00% (1/1)
  Methods: 100.00% (2/2)
  Lines:   98.56% (206/209)

Per-class coverage

Drupal\ys_demo\Plugin\Block\CounterBlock
  Methods: 100.00% ( 2/ 2)   Lines: 100.00% ( 10/ 10)