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Release engineering notes

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Revision as of 12:33, 5 October 2017 by Ghudson (talk | contribs) (→‎Post-mkrel)

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Release engineering environment

Release engineering operations are currently performed on a Ubuntu 14.04 host. Updates to the Ubuntu version may cause churn in the generated files which are checked into the repository due to newer versions of programs in the toolchain.

The release engineering host must have the following packages installed:

  • autoconf
  • build-essential
  • dejagnu
  • doxygen
  • git
  • keyutils
  • ldap-utils
  • libkeyutils-dev
  • libldap2-dev
  • libssl-dev
  • libtool
  • python-sphinx
  • python-cheetah
  • rcs
  • slapd
  • tcl-dev
  • texlive
  • texlive-latex-extra

Pulling up changes to release branches

  • For each supported release (usually the most recent and one previous release), prepare a git working copy with the krb5-x.y branch checked out from the authoritative repository. From the krbdev-services repository, copy githooks/hookutils.py and githooks-client/prepare-commit-msg into .git/hooks for both working copies.
  • Check that each working copy is clean, has no unexpected extra commits, and is up to date with the authoritative repository. Checking the output of "git status" and running "git pull" should accomplish this.
  • At https://krbdev.mit.edu/rt/ , start a new search, add the criteria "queue is krb5", then the criteria "tags is pullup", then search. It can be useful to create a browser tab for each search result.
  • If there has been a calendar year change since the last patch release, pull up the commit(s) which bump the project-wide copyright years as well.
  • For each release branch:
    • For each ticket marked for pullup to that branch:
      • For each commit listed in the ticket, run "KRB5_VERSION_FIXED=x.y.z git cherry-pick -x COMMIT", and address any merge conflicts. x.y.z should be the next patch release that will be created on the release branch.
      • Examine the commits any consider any possible interactions with changes made since the release branch.
      • Run "make" and "make check".
      • If the change isn't covered by automated tests, consider testing it by hand.
  • Consider pushing the updated release branches to a personal github fork integrated with Travis, and waiting for Travis to finish building and testing it.
  • If the pulled up changes are substantial, consider running a build and check of each release branch on krbdev-sparc-build.
  • Push the updated release branches to the authoritative repository.
  • Remove the "pullup" tag from each ticket. This can be done in a bulk update from the search result page using the button at the lower right, or it can be done on each ticket individually from the jumbo page.

Creating a new release branch

  • At https://krbdev.mit.edu/rt/ , go to Configuration -> Keywords -> k5 -> version and add x.y and x.y-next values.
  • At https://krbdev.mit.edu/rt/ , perform a search with the following criteria:
    • Queue is krb5
    • Status is resolved
    • Version_Fixed has no value
    • Tags is not unsupported
    • Tags is not noresource
    • Tags is not nochange
  • Verify that the resulting list of tickets are all for changes introduced in the past development cycle, and bulk update them to have Version_Fixed x.y.
  • On the RT server, create /var/rt2/local/WebRT/html/NoAuth/krb5-x.y and create bugs-x.y.html and fixed-x.y.html files based on the ones for past versions. Verify that http://krbdev.mit.edu/rt/NoAuth/krb5-x.y/fixed-x.y.html and .../bugs-x.y.html work.
  • Create the new branch and push it to the authoritative repository.
  • On the new branch, update README for the new release:
    • Make sure that all x.y references are for the new version (they should be already).
    • Write up a list of major changes for the new release, broken down by category. Code quality changes usually do not have associated tickets, so review the version history for commits with no RT headers.
    • Copy the list of contributors from the previous release branch.
    • Add contributors from the RT tickets for the new release branch (https://krbdev.mit.edu/rt/NoAuth/Fixed?rel=x.y)
    • Commit with the message "Update README for krb5-x.y" and push to the authoritative repository.
  • On the master branch, update README for the next prerelease:
    • In README, update x.y references to x.(y+1).
    • In README, copy the list of contributors from the x.y branch.
    • In src/patchlevel.h, update KRB5_MINOR_RELEASE to y+1.
    • Commit with the message "Updates for krb5-x.(y+1)-prerelease" and push to the authoritative repository.
  • Update web pages
    • Create directory /mit/kerberos/dist/krb5/x.y and copy HEADER from a previous directory
    • Create directories /mit/kerberos/krb5-x.y and /mit/kerberos/krb5-x.y/RCS

Preparing releases

Pre-mkrel

  • check copyright years in project-wide stuff
  • update config.guess and config.sub from git://git.savannah.gnu.org/config.git (only for minor releases, not patch releases)
  • make sure you're in a build tree that's not the source tree and configured using --enable-maintainer-mode
  • make depend and commit if changed, with the commit message "make depend"
  • regenerate manpages: (cd man && make man) and commit if changed, with the commit message "Update man pages"
  • regenerate localization template (cd po && make update-po) and commit if changed, with the commit message "make update-po"
  • manually edit patchlevel.h to reflect the new release
    • for a patch release, increment KRB5_PATCHLEVEL, change the next line to "/* #undef KRB5_RELTAIL */", and change KRB5_RELTAG to "krb5-x.y.z-final"
    • for an alpha or beta release, set KRB5_RELTAIL to "beta1" or similar, and change KRB5_RELTAG to "krb5-x.y-beta1" or similar.
  • manually update README
    • release dates (in major changes heading, ISO 8601 date format with hyphens)
      • we do not have release dates for alpha or beta releases; add one when making the first final x.y release
    • changes
    • contributors (RT is a good source for these; click through the ticket links from the above URL and look for reporter and patch author names)
    • double-check dates and release numbers in new section headings
  • re-run (cd man && make man) and (cd po && make update-po) with updated patchlevel.h
    • If there is no update to Project-Id-Version in mit-krb5.pot, touch configure.in and re-run make, then run (cd po && make update-po) again. (This should no longer be necessary after [krbdev.mit.edu #8560].)
  • commit the README, patchlevel-specific man page, and template changes with the subject "Update for krb5-x.y.z"
  • git tag krb5-x.y.z-final (or krb5-x.y-beta1 or similar for an alpha or beta release)

Running mkrel

  • path_to_mkrel/mkrel --repository $YOUR_SOURCE_TREE krb5-x.y.z-final krb5-x.y.z
    • For an alpha or beta release, path_to_mkrel/mkrel --repository $YOUR_SOURCE_TREE krb5-x.y-beta1 krb5-x.y-beta1 or similar
  • manually inspect output for versioning and correctness
    • HTML docs
    • PDF docs
    • patchlevel.h as modified by mkrel
  • push release branch commits and release tags to authoritative repository
    • you will need to be in hooks.branchers in the authoritative repository to push the tags

Post-mkrel

  • PGP sign (gpg -ab krb5-x.y.z.tar.gz, generates krb5-x.y.z.tar.gz.asc)
  • copy tar file and signature into /mit/kerberos/dist/krb5/x.y
  • for alpha and beta releases:
    • create /mit/kerberos/krb5-x.y/krb5-x.y.html based on the first commit from a previous release
    • symlink index.html to krb5-x.y.html in that directory
    • place an entry in /mit/kerberos/dist/testing.html
    • send an announcement to krbdev@mit.edu
    • skip the remaining steps up to "make followup versioning commit"
  • create /mit/kerberos/krb5-x.y/krb5-x.y.z and /mit/kerberos/krb5-x.y/krb5-x.y.z/doc
  • copy signature to /mit/kerberos/krb5-x.y/krb5-x.y.z.sig
  • copy README from release source code to /mit/kerberos/krb5-x.y/README-x.y.z.txt
  • generate branded HTML docs
    • HTML_LOGO=/mit/kerberos/mitkc-logo-sm.png make html
    • we don't ship the branded (with logo) docs because the logo is an MIT trademark
    • copy the resulting documentation tree to /mit/kerberos/krb5-x.y/krb5-x.y.z/doc/html
    • repeat for HTML_LOGO=... make pdf and .../doc/pdf
  • update RT configuration
    • on RT server, create files in /var/rt2/local/WebRT/html/NoAuth/krb5-x.y for new release
    • check that http://krbdev.mit.edu/rt/NoAuth/krb5-x.y/fixed-x.y.z.html and .../bugs-x.y.z.html work
    • in the web interface, to go Configuration -> Keywords -> k5 -> version and add a new one for the next patch release
  • edit web pages
    • create /mit/kerberos/krb5-x.y/krb5-x.y.z.html and check it into RCS, using similar files as an example
    • update /mit/kerberos/index.html with the new release numbers (possibly removing out-of-service releases) and add entries to the "Recent news" section; add old release entries to historical.html and old news items to oldnews.html
    • update /mit/kerberos/dist/index.html with new release references (possibly removing out-of-service releases); add old entries to historic.html
    • review edited web pages in a web browser and double check that release numbers and release dates have been updated
    • update /mit/kerberos/krb5-x.y/doc and /mit/kerberos/krb5-x.y/index.html symlinks
    • update /mit/kerberos/latest symlink if this is a major or minor release
    • for the first final krb5-x.y release, remove the entry from /mit/kerberos/dist/testing.html
  • send announcement to kerberos-announce
  • make followup versioning commit to release branch
    • edit src/patchlevel.h, setting KRB5_RELTAIL to "postrelease" and KRB5_RELTAG to "krb5-x.y"
    • use the commit message "Update for krb5-x.y.z-postrelease"
    • push this commit to the authoritative repository
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