mirror of https://github.com/mpv-player/mpv
346 lines
14 KiB
Plaintext
346 lines
14 KiB
Plaintext
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About Subversion write access:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Before everything else, you should know how to use Subversion properly.
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Subversion comes with some documentation.
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svn help
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man svn
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info svn
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are a good start. The most comprehensive manual is the book "Version Control
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with Subversion" by Ben Collins-Sussman, Brian W. Fitzpatrick and C. Michael
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Pilato. It can be viewed online at
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http://svnbook.org/
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For more information about the Subversion project, visit
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http://subversion.tigris.org/
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Consult these resources whenever you have problems, they are quite exhaustive.
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What follows now are MPlayer specific guidelines.
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I. TECH SIDE:
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=============
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1. Checking out development source tree:
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svn checkout svn://svn.mplayerhq.hu/mplayer/trunk/
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or
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svn co svn://svn.mplayerhq.hu/mplayer/trunk/
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2. Updating source tree to latest revision:
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svn update
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or
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svn up
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3. Committing changes:
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svn up
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svn commit --username USERNAME filename(s)
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Do not use comments such as: "bug fix." or "files changed" or "dunno".
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You don't have to include the filename in the comment, as comments are linked
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to files. If you have made several independent changes, commit them
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separately, not at the same time. You will be prompted for a comment in an
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editor, which is either specified by --editor-cmd on the command line, set
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in your personal configuration file (~/.subversion/config) or set by one of
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the following environment variables: SVN_EDITOR, VISUAL or EDITOR. When
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prompted for a password, type the password you got assigned by the Subversion
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server admin. By default, Subversion caches all authentication tokens. This
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behaviour can be disabled by setting both 'store-passwords' and
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'store-auth-creds' to "no" in ~/.subversion/config. You might need to remove
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previous cache files, which are located in ~/.subversion/auth, by hand.
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4. Adding new files/dirs:
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svn add filename/dirname
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svn commit filename
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5. Removing files:
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rm filename
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svn delete filename
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svn commit filename
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6. Checking changes:
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svn diff filename(s)
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Doublecheck your changes before committing to avoid trouble later on.
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This way you will see if your patch has debug stuff or indentation
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changes and you can fix it before committing and triggering flames.
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7. Checking changelog:
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svn log filename(s)
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You may also find viewvc, a web frontend for Subversion, helpful. It's often
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more comfortable than using svn log and svn diff. Find it here:
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http://svn.mplayerhq.hu/mplayer/trunk/
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8. Renaming/moving files or content of files:
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svn move source destination
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svn commit source destination
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Do not move or rename files before discussing it on the mplayer-dev-eng
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mailing list first!
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Don't do a lot of cut'n'paste from one file to another without a very good
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reason and discuss it on the mplayer-dev-eng mailing list first. It will make
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those changes untraceable!
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Such actions are useless and treated as cosmetics in 99% of cases,
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so try to avoid them.
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9. Reverting broken commits
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There is no Subversion equivalent of the 'cvs admin -o' command. Instead,
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be very careful about what you commit! If somehow you broke something,
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revert the changes locally and re-commit with a proper commit message.
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You may want to use 'svn cat -r<revision> filename' to inspect an older
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revision.
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10. Checking status of source tree
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svn status
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This will detect all the changes you made and list what actions will be
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taken in case of a commit (Additions, Modifications, Deletions, et cetera).
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11. Reverting local changes
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svn revert filename(s)
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In case you made a lot of local changes to a file and want to start over
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with a fresh checkout of that file, you can use svn revert filename(s).
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NOTE: This has nothing to do with reverting changes on the Subversion
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server! It only reverts changes that were not committed yet. If you need
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to revert a broken commit, see 9.
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Contact the project admin <root at mplayerhq dot hu> if you have technical
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problems with the Subversion server.
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II. POLICY / RULES:
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===================
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1. You must not commit code which breaks MPlayer! (Meaning unfinished but
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enabled code which breaks compilation or compiles but does not work.)
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You can commit unfinished stuff (for testing etc), but it must be disabled
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(#ifdef etc) by default so it does not interfere with other developers'
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work.
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2. You don't have to over-test things. If it works for you, and you think it
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should work for others, too, then commit. If your code has problems
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(portability, exploits compiler bugs, unusual environment etc) they will be
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reported and eventually fixed.
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3. Do not commit unrelated changes together, split them into self-contained
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pieces.
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4. Do not change behavior of the program (renaming options etc) or
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remove functionality from the code without approval in a discussion on
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the mplayer-dev-eng mailing list.
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5. Do not commit changes to the build system (Makefiles, configure script)
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which change behaviour, defaults etc, without asking first. The same
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applies to compiler warning fixes, trivial looking fixes and to code
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maintained by other developers. We usually have a reason for doing things
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the way we do. Send your changes as patches to the mplayer-dev-eng mailing
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list, and if the code maintainers say OK, you may commit. This does not
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apply to files you wrote and/or maintain.
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6. We refuse source indentation and other cosmetic changes if they are mixed
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with functional changes, such commits will be rejected and removed. Every
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developer has his own indentation style, you should not change it. Of course
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if you (re)write something, you can use your own style... (Many projects
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force a given indentation style - we don't.) If you really need to make
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indentation changes (try to avoid this), separate them strictly from real
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changes.
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NOTE: If you had to put if(){ .. } over a large (> 5 lines) chunk of code,
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do NOT change the indentation of the inner part (don't move it to the right)!
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7. Always fill out the commit log message. Describe in a few lines what you
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changed and why. You can refer to mailing list postings if you fix a
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particular bug. Comments such as "fixed!" or "Changed it." are unacceptable.
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8. If you apply a patch by someone else, include the name and email address in
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the log message. Since the mplayer-cvslog mailing list is publicly
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archived you should add some spam protection to the email address. Send an
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answer to mplayer-dev-eng (or wherever you got the patch from) saying that
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you applied the patch. If the patch contains a documentation change, commit
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that as well; do not leave it to the documentation maintainers.
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9. Do NOT commit to code actively maintained by others without permission. Send
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a patch to mplayer-dev-eng instead.
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10. Subscribe to the mplayer-cvslog mailing list. The diffs of all commits
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are sent there and reviewed by all the other developers. Bugs and possible
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improvements or general questions regarding commits are discussed there. We
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expect you to react if problems with your code are uncovered.
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11. Update the documentation if you change behavior or add features. If you are
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unsure how best to do this, send a patch to mplayer-docs, the documentation
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maintainers will review and commit your stuff.
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Also read DOCS/tech/patches.txt !!!!
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We think our rules are not too hard. If you have comments, contact us.
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III. Beginners Guide by David Holm
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====================
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When I first got CVS write access I got banned after only a few hours
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because I didn't fully understand this documentation. This part is for
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those of you who have just got CVS write access and want to avoid the
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most common pitfalls leading to CVS ban.
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I will introduce a step-by-step guide explaining how I'm making sure
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that my CVS commits are proper and won't get me banned.
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1. You should set up two directoress for MPlayer, one which contains the stable
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version and has the :ext: option instead of :pserver: in CVS/Root.
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The other should be your development directory and have the CVS/Root set to
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:pserver: instead of :ext:, that way you can't commit development code
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by accident (since only :ext: allows writes).
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This is my setup:
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~/mplayer
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/main
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/main.dev
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NOTE: I'll use these directory names from here on in the guide, what you
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call your directories is entirely up to you. This is _only_ an example.
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2. When you are satisfied with the changes in "main.dev" and think you are
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ready to commit the changes to CVS start by doing the following in the
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"~/mplayer" dir":
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diff -Nur -x "CVS" -x ".*" main main.dev > dev2stable
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dev2stable is the filename for the patchfile, it doesn't matter what you
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call it.
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3. Now comes one of the tricky parts, editing the patch. I prefer using mcedit
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(comes with Midnight Commander) since it does syntax highlighting in patches
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(= it uses colors to identify lines =), But most ASCII editors should do
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(meaning don't use Star Office and save it as a Star Office document for
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instance ;) I will try to explain this as good as I can.
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Read through the patch and remove all occurrences of:
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* diff -Nur.... that are affecting files YOU have NOT modified. These
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occur when either main or main.dev are a different version (not checked
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out at the same time)
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EVERYTHING from the diff -Nur... line until the next diff -Nur... line
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are changes to the file specified after the diff options, and ONLY that
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file.
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* Lines containing "Binary files..." if you add the 'a' switch to -N(a)ur
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binary files will be added to the patch as well, making it huge and
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putting a lot of unnecessary data in it (since you seldom commit any
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binaries).
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* If you find changes within a diff block that you don't want to commit
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you can delete them if they are the only changes ranging from the
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@@ -x,y +x,y @@ until the line before the next @@ -x,y +x,y @@. You
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_cannot_ remove single lines after a @@ -x,y +x,y @@ because that will
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break the patch!.
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Example:
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...
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@@ -15,34 +15,6 @@
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- old_option;
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+ new_option;
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@@ -65,13 +65,3 @@
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...
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OK:
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...
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@@ -65,13 +65,3 @@
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...
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Will break patch:
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...
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@@ -15,34 +15,6 @@
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old_option;
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@@ -65,13 +65,3 @@
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...
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When I end up in a situation where I have to remove just some lines from
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a block, I leave it alone, remember (write down) which file it is in and
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then edit the file in "main" after I've applied the patch.
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* Now it's time for applying the patch to the "main" (stable) directory.
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This should be done in two steps:
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1. enter "main" and run
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patch -p1 --dry-run < ../dev2stable
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-p1 means that you are one level deep (that you have entered the
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"main" directory and that should be stripped when patching, if you
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run it from "~/mplayer" you would use -p0).
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--dry-run means that patch does everything it normally does but
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without modifying ANY files. This is a great way of testing whether
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your patch works or not.
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"../dev2stable" is your patchfile. (don't forget the '<')
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If the dry run fails, check the line it failed on and figure out
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why it failed, make a new patch and try again.
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2. OK, you finally have a working patch, remove --dry-run, patch "main"
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and you are done with the patching part =).
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4. It's almost time for the final step, committing the changes. But first you
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MUST make sure your changes compile without breaking anything and that it
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follows the Policy mentioned in section 2. (Read it until your eyes are
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bleeding if you want to keep CVS access!)
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Don't worry about object files etc that will be created in your "main" dir,
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they won't be sent to CVS on a commit, you must use the add command to add
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new files (discuss it on dev-eng before adding new files!).
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Now to make sure your additions follow policy do the following on every file
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you will commit:
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cvs -z3 diff -u <filename> > <filename.d>
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Of course the output file (<filename.d>) can have any name you want. This
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will create a file showing the differences between the file on CVS and your
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updated local file.
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I will explain some of the policy rules I had a hard time understanding:
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II.5: This means that if for instance you have lines in <filename.d> that
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look something like this:
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-
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+
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That means you have added or removed tabs or spaces on that line.
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That qualifies as a cosmetic change and is disallowed. Edit the
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file and put back/remove the added/removed tabs/spaces.
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Rediff the file and make sure the cosmetic changes are fixed.
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II.6: Make sure you read and understand this properly before committing
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anything. Commit one file at a time!
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5. OK, you have a working patch following the CVS policy, excellent work. Now
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for the final step, committing. This is really simple. Just run the
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following command in "main" for each file you want to commit:
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cvs -z3 commit -m "<comment (changes)>" <filename>
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cvs -z3 commit <filename>
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The latter will bring up your default text editor for writing comments (I
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prefer this method).
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You are done, congratulations. If you are certain you have followed all of the
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policy you shouldn't have any trouble with the CVS maintainers at all.
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At first I thought the policy was too strict, but I discussed it with A'rpi and
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he made some very good points, so don't complain.
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