X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/f16b08196c780556cbf50691e2944960aebc46f6..e34e97bcd736ab3193bfd3abd4162db3b159836d:/README-hacking?ds=inline diff --git a/README-hacking b/README-hacking index f2b53b14..31a036ba 100644 --- a/README-hacking +++ b/README-hacking @@ -1,9 +1,58 @@ -*- outline -*- +This file attempts to describe the rules to use when hacking Bison. +Don't put this file into the distribution. + +Everything related to the development of Bison is on Savannah: + + http://savannah.gnu.org/projects/bison/ + + +* Administrivia + +** If you incorporate a change from somebody on the net: +First, if it is a large change, you must make sure they have signed +the appropriate paperwork. Second, be sure to add their name and +email address to THANKS. + +** If a change fixes a test, mention the test in the ChangeLog entry. + +** Bug reports +If somebody reports a new bug, mention his name in the ChangeLog entry +and in the test case you write. Put him into THANKS. + +The correct response to most actual bugs is to write a new test case +which demonstrates the bug. Then fix the bug, re-run the test suite, +and check everything in. + +** You may find it useful to install the git-merge-changelog merge driver: + + http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=blob;f=lib/git-merge-changelog.c + +When following the generic installation instructions there, keep in mind that +your clone of Bison's git repository already contains appropriate +.gitattributes files, and running Bison's bootstrap script will make the +necessary changes to .git/config. + + +* Hacking + +** Visible changes +Which include serious bug fixes, must be mentioned in NEWS. + +** Translations +Only user visible strings are to be translated: error messages, bits +of the .output file etc. This excludes impossible error messages +(comparable to assert/abort), and all the --trace output which is +meant for the maintainers only. + + +* Working from the repository + These notes intend to help people working on the checked-out sources. These requirements do not apply when building from a distribution tarball. -* Requirements +** Requirements We've opted to keep only the highest-level sources in the repository. This eases our maintenance burden, (fewer merges etc.), but imposes more @@ -16,12 +65,9 @@ tools we depend upon, including: - Flex - Gettext - Gzip +- Perl +- Rsync - Tar -- Wget - -Only building the initial full source tree will be a bit painful. -Later, after synchronizing from the repository a plain `make' should -be sufficient. Valgrind is also highly recommended, if Valgrind supports your architecture. @@ -32,41 +78,314 @@ generated from the grammars is out of date, and to bootstrap with an out-of-date version of the C code, but the process is not foolproof. Also, you may run into similar problems yourself if you modify Bison. -Only building the initial full source tree will be a bit painful, -later, a plain `cvs update -P && make' should be sufficient. +Only building the initial full source tree will be a bit painful. +Later, after synchronizing from the repository a plain `make' should +be sufficient. -* First checkout +** First checkout Obviously, if you are reading these notes, you did manage to check out -Bison from the repository. For the record, you will find all the +this package from the repository. For the record, you will find all the relevant information on: - http://savannah.gnu.org/cvs/?group_id=56 + http://savannah.gnu.org/git/?group=bison + +Bison uses Git submodules: subscriptions to other Git repositories. +In particular it uses gnulib, the GNU portability library. To ask Git +to perform the first checkout of the submodules, run + + $ git submodule update --init + +Git submodule support is weak before versions 1.6 and later, you +should probably upgrade Git if your version is older. The next step is to get other files needed to build, which are extracted from other source packages: - $ ./bootstrap + $ ./bootstrap And there you are! Just - $ ./configure - $ make - $ make check + $ ./configure + $ make + $ make check At this point, there should be no difference between your local copy, and the master copy: - $ cvs diff + $ git diff should output no difference. Enjoy! +** Updating + +The use of submodules make things somewhat different because git does +not support recursive operations: submodules must be taken care of +explicitly by the user. + +*** Updating Bison + +If you pull a newer version of a branch, say via `git pull', you might +import requests for updated submodules. A simple `git diff' will +reveal if the current version of the submodule (i.e., the actual +contents of the gnulib directory) and the current request from the +subscriber (i.e., the reference of the version of gnulib that the +Bison reporitory requests) differ. To upgrade the submodules (i.e., +to check out the version that is actually requested by the subscriber, +run `git submodule update'. + + $ git pull + $ git submodule update + +*** Updating a submodule +To update a submodule, say gnulib, do as follows: + +Get the most recent version of the master branch from git. + + $ cd gnulib + $ git fetch + $ git checkout -b master --track origin/master + +Make sure Bison can live with that version of gnulib. + + $ cd .. + $ ./bootstrap + $ make distcheck + +Register your changes. + + $ git checkin ... + +For a suggestion of what gnulib commit might be stable enough for a +formal release, see the ChangeLog in the latest gnulib snapshot at: + + http://erislabs.net/ianb/projects/gnulib/ + +The autoconf files we use are currently: + + m4/m4.m4 + lib/m4sugar/m4sugar.m4 + lib/m4sugar/foreach.m4 + +These files don't change very often in autoconf, so it should be +relatively straight-forward to examine the differences in order to +decide whether to update. + +* Test suite + +** make check +Use liberally. + +** Release checks +Try to run the test suite with more severe conditions before a +release: + +- Configure the package with --enable-gcc-warnings, so that one checks + that 1. Bison compiles cleanly, 2. the parsers it produces compile + cleanly too. + +- Build with -DGNULIB_POSIXCHECK. It suggests gnulib modules that can + fix portability issues. + +- run `make maintainer-check' which: + - runs `valgrind -q bison' to run Bison under Valgrind. + - runs the parsers under Valgrind. + - runs the test suite with G++ as C compiler... + +- run `make maintainer-push-check', which runs `make maintainer-check' + while activating the push implementation and its pull interface wrappers + in many test cases that were originally written to exercise only the + pull implementation. This makes certain the push implementation can + perform every task the pull implementation can. + +- run `make maintainer-xml-check', which runs `make maintainer-check' + while checking Bison's XML automaton report for every working grammar + passed to Bison in the test suite. The check just diffs the output of + Bison's included XSLT style sheets with the output of --report=all and + --graph. + +- Change tests/atlocal/CFLAGS to add your preferred options. For + instance, `-traditional' to check that the parsers are K&R. Note + that it does not make sense for glr.c, which should be ANSI, + but currently is actually GNU C, nor for lalr1.cc. + + +* Release Procedure + +** Update the submodules. See above. + +** Update maintainer tools, such as Autoconf. See above. + +** Try to get the *.pot files to the Translation Project at least one +week before a stable release, to give them time to translate them. +Before generating the *.pot files, make sure that po/POTFILES.in and +runtime-po/POTFILES.in list all files with translatable strings. +This helps: grep -l '\<_(' * + +** Tests +See above. + +** Update the foreign files +Running `./bootstrap' in the top level should update them all for you. +This covers PO files too. Sometimes a PO file contains problems that +causes it to be rejected by recent Gettext releases; please report +these to the Translation Project. + +** Update README +Make sure the information in README is current. Most notably, make sure +it recommends a version of GNU M4 that is compatible with the latest +Bison sources. + +** Check copyright years. +We update years in copyright statements throughout Bison once at the +start of every year by running `make update-copyright'. However, before +a release, it's good to verify that it's actually been run. Besides the +copyright statement for each Bison file, check the copyright statements +that the skeletons insert into generated parsers, and check all +occurrences of PACKAGE_COPYRIGHT_YEAR in configure.ac. + +** Update NEWS +The version number, *and* the date of the release (including for +betas). + +** Update ChangeLog +Should have an entry similar to `Version 1.49b.'. + +** Tag the release +Before Bison will build with the right version number, you must tag the release +in git. Do this after all other changes. The command is similar to: + + git tag -a v2.3b + +The log message can be simply: + + Bison 2.3b + +** Push +Once `make distcheck' passes, push your changes and the tag. +`git push' without arguments will not push the tag. + +** make alpha +FIXME: `make alpha' is not maintained and is broken. These +instructions need to be replaced or removed. + +Running `make alpha' is absolutely perfect for beta releases: it makes +the tarballs, the xdeltas, and prepares (in /tmp/) a proto +announcement. It is so neat, that that's what I use anyway for +genuine releases, but adjusting things by hand (e.g., the urls in the +announcement file, the ChangeLog which is not needed etc.). + +If it fails, you're on your own... + +It requires GNU Make. + +** Upload +The generic GNU upload procedure is at: + + http://www.gnu.org/prep/maintain/maintain.html#Automated-FTP-Uploads + +Follow the instructions there to register your information so you're permitted +to upload. Make sure your public key has been uploaded at least to +keys.gnupg.net. You can upload it with: + + gpg --keyserver keys.gnupg.net --send-keys F125BDF3 + +where F125BDF3 should be replaced with your key ID. + +Here's a brief reminder of how to roll the tarballs and upload them: + +*** make distcheck +*** gpg -b bison-2.3b.tar.gz +*** In a file named `bison-2.3b.tar.gz.directive', type: + + version: 1.1 + directory: bison + filename: bison-2.3b.tar.gz + +*** gpg --clearsign bison-2.3b.tar.gz.directive +*** ftp ftp-upload.gnu.org # Log in as anonymous. +*** cd /incoming/alpha # cd /incoming/ftp for full release. +*** put bison-2.3b.tar.gz # This can take a while. +*** put bison-2.3b.tar.gz.sig +*** put bison-2.3b.tar.gz.directive.asc +*** Repeat all these steps for bison-2.3b.tar.xz. + +** Update Bison manual on www.gnu.org. + +*** You need a non-anonymous checkout of the web pages directory. + + $ cvs -d YOUR_USERID@cvs.savannah.gnu.org:/web/bison checkout bison + +*** Get familiar with the instructions for web page maintainers. +http://www.gnu.org/server/standards/readme_index.html +http://www.gnu.org/server/standards/README.software.html +especially the note about symlinks. + +*** Build the web pages. +Assuming BISON_CHECKOUT refers to a checkout of the Bison dir, and +BISON_WWW_CHECKOUT refers to the web directory created above, do: + + $ cd $BISON_CHECKOUT/doc + $ make stamp-vti + $ ../build-aux/gendocs.sh -o "$BISON_WWW_CHECKOUT/manual" \ + bison "Bison - GNU parser generator" + $ cd $BISON_WWW_CHECKOUT + +Verify that the result looks sane. + +*** Commit the modified and the new files. + +*** Remove old files. +Find the files which have not been overwritten (because they belonged to +sections that have been removed or renamed): + + $ cd manual/html_node + $ ls -lt + +Remove these files and commit their removal to CVS. For each of these +files, add a line to the file .symlinks. This will ensure that +hyperlinks to the removed files will redirect to the entire manual; this +is better than a 404 error. + +There is a problem with 'index.html' being written twice (once for POSIX +function 'index', once for the table of contents); you can ignore this +issue. + +** Announce +To generate a template announcement file: + + make RELEASE_TYPE=alpha gpg_key_ID=F125BDF3 announcement + +where alpha can be replaced by beta or stable and F125BDF3 should be +replaced with your key ID. + +Complete/fix the announcement file. The generated list of recipients +(info-gnu@gnu.org, bug-bison@gnu.org, help-bison@gnu.org, +bison-patches@gnu.org, and coordinator@translationproject.org) is +appropriate for a stable release or a ``serious beta''. For any other +release, drop at least info-gnu@gnu.org. For an example of how to fill +out the rest of the template, search the mailing list archives for the +most recent release announcement. + +For a stable release, send the same announcement on the comp.compilers +newsgroup by sending email to compilers@iecc.com. Do not make any Cc as +the moderator will throw away anything cross-posted or Cc'ed. It really +needs to be a separate message. + +** Bump the version number +In configure.ac. Run `make'. So that developers don't accidentally add new +items to the old NEWS entry, create a new empty NEWS entry something like: + + Changes in version ?.? (????-??-??): + +Push these changes. + + ----- -Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software -Foundation, Inc. +Copyright (C) 2002-2005, 2007-2012 Free Software Foundation, Inc. This file is part of GNU Bison.