Here are most of the steps we (maintainers) follow when making a release.

* Start from a clean, up-to-date git directory on "master":

    make -k maintainer-clean || { ./configure && make maintainer-clean; }
    git checkout master
    git pull origin master

* Ensure that the latest stable versions of autoconf, automake, etc.
  are in your PATH.  See the buildreq list in bootstrap.conf for
  the complete list of tools.

* Ensure that you have no uncommitted diffs.  This should produce no
  output:

    git diff

* Ensure that you've pushed all changes that belong in the release:

    git push origin master

* Check that the NixOS/Hydra autobuilder is reporting all is well:

    http://hydra.nixos.org/jobset/gnu/bison-master

* Run the following command to download any new translations:

    ./bootstrap && ./configure

* Pre-release testing: ensure that the following command succeeds:

    make check syntax-check distcheck

* From top_srcdir, run:

    build-aux/do-release-commit-and-tag X.Y stable

  in order to (i) set the date, version number, and release type
  [stable/alpha/beta] on line 3 of NEWS, (ii) commit that, and (iii) tag the
  release.  See --help if you need options such as:

    build-aux/do-release-commit-and-tag --branch=maint -C _build X.Y.Z stable

* Run the following to create release tarballs.  Your choice selects the
  corresponding upload-to destination in the emitted gnupload command.
  The different destinations are specified in cfg.mk.  See the definitions
  of gnu_ftp_host-{alpha,beta,stable}.

    # "TYPE" must be stable, beta or alpha
    make TYPE

* Test the tarball.  Copy it to a few odd-ball systems and ensure that
  it builds and passes all tests.

* While that's happening, write the release announcement that you will
  soon post.  Start with the template, $HOME/announce-bison-X.Y
  that was just created by that "make" command.

Once all the builds and tests have passed,

* Run the gnupload command that was suggested by your "make TYPE" run above.

* Wait a few minutes (maybe up to 30?) and then use the release URLs to
  download all tarball/signature pairs and use gpg --verify to ensure
  that they're all valid.

* Push the NEWS-updating changes and the new tag:

    v=$(cat .prev-version)
    git push origin master tag v$v

* Announce it on Savannah first, so you can include the savannah.org
  announcement link in the email message.

  From here:

    https://savannah.gnu.org/projects/bison/

  click on "Submit news", then write something like the following:
  (If there is no such button, then enable "News" for the project via
  the "Main->Select Features" menu item, or via this link:

    https://savannah.gnu.org/project/admin/editgroupfeatures.php?group=bison

  )

    Subject: bison-X.Y released [stable]
    +verbatim+
    ...paste the announcement here...
    -verbatim-

  Then go here to approve it:

    https://savannah.gnu.org/news/approve.php?group=bison

* Send the announcement email message.

* After each non-alpha release, update the on-line manual accessible via

    http://www.gnu.org/software/bison/manual/

  by running this from top_srcdir:

    build-aux/gnu-web-doc-update

  possibly with "-C <BUILDDIR>"
