Rebase Tor Browser and Base Browser stable to 102.12esr

NOTE: All examples reference the rebase from 102.7.0esr to 102.8.0esr

Explanation of variables

- `$(ESR_VERSION)` : the Mozilla defined ESR version, used in various places for building tor-browser tags, labels, etc - example : `102.8.0` - `(ESR_TAG)` : the Mozilla defined hg (Mercurial) tag associated with `(ESR_VERSION)` - example : `FIREFOX_102_8_0esr_RELEASE` - `$(ESR_TAG_PREV)` : the Mozilla defined hg (Mercurial) tag associated with the previous ESR version when rebasing (ie, the ESR version we are rebasing from) - `$(BROWSER_MAJOR)` : the browser major version - example : `12` - `$(BROWSER_MINOR)` : the browser minor version - example : either `0` or `5`; Alpha's is always `(Stable + 5) % 10` - `$(BASE_BROWSER_BRANCH)` : the full name of the current `base-browser` branch - example: `base-browser-102.8.0esr-12.0-1` - `$(BASE_BROWSER_BRANCH_PREV)` : the full name of the previous `base-browser` branch - example: `base-browser-102.7.0esr-12.0-1` - `$(TOR_BROWSER_BRANCH)` : the full name of the current `tor-browser` branch - example: `tor-browser-102.8.0esr-12.0-1` - `$(TOR_BROWSER_BRANCH_PREV)` : the full name of the previous `tor-browser` branch - example: `tor-browser-102.7.0esr-12.0-1`

Bookkeeping

• Link this issue to the appropriate Release Prep issue.

Update Branch Protection Rules

• In Repository Settings:
  • Remove previous stable base-browser and tor-browser branch protection rules (this will prevent pushing new changes to the branches being rebased)
  • Create new base-browser and tor-browser branch protection rule:
    • Branch: *-$(ESR_VERSION)esr-$(BROWSER_MAJOR).$(BROWSER_MINOR)-1*
      • example: *-102.8.0esr-12.0-1*
    • Allowed to merge: Maintainers
    • Allowed to push and merge: Maintainers
    • Allowed to force push: false

Identify the Firefox Tagged Commit and Create New Branches

• Find the Firefox mercurial tag here : https://hg.mozilla.org/releases/mozilla-esr102/tags
  • example: FIREFOX_102_8_0esr_BUILD1
• Find the analogous gecko-dev commit : https://github.com/mozilla/gecko-dev
  • Search for unique string found in the mercurial commit in the gecko-dev/esr102 branch
  • example: 3a3a96c9
• Sign and Tag gecko-dev commit
  • Sign/Tag gecko-dev commit :
    • Tag : $(ESR_TAG)
    • Message : Hg tag $(ESR_TAG)
• Create new stable base-browser branch from tag
  • branch name in the form: base-browser-$(ESR_VERSION)esr-$(BROWSER_MAJOR).$(BROWSER_MINOR)-1
  • example: base-browser-102.8.0esr-12.0-1
• Create new stable tor-browser branch from
  • branch name in the form: tor-browser-$(ESR_VERSION)esr-$(BROWSER_MAJOR).$(BROWSER_MINOR)-1
  • example: tor-browser-102.8.0esr-12.0-1
• Push new base-browser branch to origin
• Push new tor-browser branch to origin
• Push new $(ESR_TAG) to origin

Rebase base-browser

• Checkout a new local branch for the base-browser rebase
  • example: git branch base-browser-rebase FIREFOX_102_8_0esr_BUILD1
• Cherry-pick the previous base-browser commits up to base-browser's build1 tag onto new base-browser rebase branch
  • example: git cherry-pick FIREFOX_102_7_0esr_BUILD1..base-browser-102.7.0esr-12.0-1-build1
• Rebase and autosquash these cherry-picked commits
  • example: git rebase --autosquash --interactive FIREFOX_102_8_0esr_BUILD1 HEAD
• Cherry-pick remainder of patches after the build1 tag
  • example: git cherry-pick base-browser-102.7.0esr-12.0-1-build1 origin/base-browser-102.7.0esr-12.0-1
• Compare patch sets to ensure nothing weird happened during conflict resolution:
  • diff of diffs:
    • Do the diff between current_patchset.diff and rebased_patchset.diff with your preferred difftool and look at differences on lines that starts with + or -
    • git diff $(ESR_TAG_PREV)..$(BASE_BROWSER_BRANCH_PREV) > current_patchset.diff
    • git diff $(ESR_TAG)..$(BASE_BROWSER_BRANCH) > rebased_patchset.diff
    • diff current_patchset.diff and rebased_patchset.diff
      • If everything went correctly, the only lines which should differ should be the lines starting with index abc123...def456
  • rangediff: git range-diff $(ESR_TAG_PREV)..$(BASE_BROWSER_BRANCH_PREV) $(ESR_TAG)..HEAD
    • example: git range-dif FIREFOX_102_7_0esr_BUILD1..origin/base-browser-102.7.0esr-12.0-1 FIREFOX_102_8_0esr_BUILD1..HEAD
• Open MR for the base-browser rebase
• Merge
• Sign/Tag HEAD of the merged new base-browser branch:
  • Tag : base-browser-$(ESR_VERSION)esr-$(BROWSER_MAJOR).$(BROWSER_MINOR)-1-build1
  • Message : Tagging build1 for $(ESR_VERSION)esr-based stable
• Push tag to origin

Rebase tor-browser

• Checkout a new branch for the tor-browser rebase starting from the base-browser build1 tag
  • example: git branch tor-browser-rebase base-browser-102.8.0esr-12.0-1-build1
• Cherry-pick the previous tor-browser commits from base-browser's previous build1 tag up to tor-browser's newest buildN tag (not necessarily build1 if we have multiple build tags)
  • example: git cherry-pick base-browser-102.7.0esr-12.0-1-build1..tor-browser-102.7.0esr-12.0-1-build1
• Rebase and autosquash these cherry-picked commits (from the last new base-browser commit to HEAD)
  • example: git rebase --autosquash --interactive base-browser-102.8.0esr-12.0-1-build1 HEAD
• Cherry-pick remainder of patches after the last buildN tag
  • example: git cherry-pick base-browser-102.7.0esr-12.0-1-build1..origin/tor-browser-102.7.0esr-12.0-1
• Compare patch sets to ensure nothing weird happened during conflict resolution:
  • diff of diffs:
    • Do the diff between current_patchset.diff and rebased_patchset.diff with your preferred difftool and look at differences on lines that starts with + or -
    • git diff $(ESR_TAG_PREV)..$(BROWSER_BRANCH_PREV) > current_patchset.diff
    • git diff $(ESR_TAG)..$(BROWSER_BRANCH) > rebased_patchset.diff
    • diff current_patchset.diff and rebased_patchset.diff
      • If everything went correctly, the only lines which should differ should be the lines starting with index abc123...def456 (unless the previous base-browser branch includes changes not included in the previous tor-browser branch)
  • rangediff: git range-diff $(ESR_TAG_PREV)..$(TOR_BROWSER_BRANCH_PREV) $(ESR_TAG)..HEAD
    • example: git range-dif FIREFOX_102_7_0esr_BUILD1..origin/tor-browser-102.7.0esr-12.0-1 FIREFOX_102_8_0esr_BUILD1..HEAD
• Open MR for the tor-browser rebase
• Merge
• Sign/Tag HEAD of the merged new tor-browser branch:
  • Tag : tor-browser-$(ESR_VERSION)esr-$(BROWSER_MAJOR).$(BROWSER_MINOR)-1-build1
  • Message : Tagging build1 for $(ESR_VERSION)esr-based stable
• Push tag to origin