fix(stack): normalize --branch by stripping prefix and change ID suffix

[JulianMaurin]

Allow stack checkout --branch to accept a full head ref name
(e.g. devs/user/MRGFY-6797/Ibb431d...) by automatically stripping
the branch prefix and change ID suffix before building the search query.

Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com

[JulianMaurin]

This pull request is part of a stack:

1. fix(stack): normalize --branch by stripping prefix and change ID suffix (#1124) 👈

[mergify]

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[mergify]

@JulianMaurin this pull request is now in conflict 😩

[Copilot]

Pull request overview

Enables mergify stack checkout --branch to accept full head ref strings by normalizing the input branch (stripping configured prefix and Change-Id suffix) before building the GitHub search query.

Changes:

• Add Change-Id suffix regex constant and reuse it across stack modules.
• Normalize --branch in stack_checkout() by removing /I<40-hex> suffix and optional configured prefix.
• Add parametrized test coverage for branch normalization behavior.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
mergify_cli/tests/stack/test_checkout.py	Adds tests asserting --branch normalization affects the GitHub search query as expected
mergify_cli/stack/push.py	Reuses shared Change-Id suffix regex when detecting local “generated” branches
mergify_cli/stack/checkout.py	Implements branch normalization before computing stack_branch
mergify_cli/stack/changes.py	Introduces shared Change-Id pattern constants/regexes (including suffix regex)

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[mergify]

@JulianMaurin this pull request is now in conflict 😩

[mergify]

Merge Queue Status

• ✅ Entered queue — 2026-04-10 18:27 UTC · Rule: default
• ✅ Checks passed · on draft merge queue: embarking main (1776afb) and #1124 together #1136
• ✅ Merged — 2026-04-10 18:31 UTC · at 45ff546229075dd346e470e5e17da4e769ce123d

This pull request spent 3 minutes 8 seconds in the queue, including 2 minutes 54 seconds running CI.

Required conditions to merge

• all of [🛡 Merge Protections rule Enforce conventional commit]:
  • title ~= ^(fix|feat|docs|style|refactor|perf|test|build|ci|chore|revert)(?:\(.+\))?:
    • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
• all of [🛡 Merge Protections rule 👀 Review Requirements]:
  • any of:
    • #approved-reviews-by>=2
      • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
    • author = dependabot[bot]
      • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
    • author = mergify-ci-bot
      • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
    • author = renovate[bot]
      • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
• all of [🛡 Merge Protections rule 📕 PR description]:
  • body ~= (?ms:.{48,})
    • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
• all of [🛡 Merge Protections rule 🔎 Reviews]:
  • #changes-requested-reviews-by = 0
    • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
  • #review-requested = 0
    • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
  • #review-threads-unresolved = 0
    • fix(stack): normalize --branch by stripping prefix and change ID suffix #1124
• all of [🛡 Merge Protections rule 🤖 Continuous Integration]:
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    • check-success=ci-gate