This page describes some of the things I've found missing in Subversion, when coming from CVS:

  1. There is no way using Subversion to diff a local change ("working copy" in SVN speak) with a different branch.
    • With CVS I can do an MFC, fix the conflicts and compare with CURRENT by using;
        $ cd releng7/bin/cat
        $ cvs up -j 1.3 cat.c
        $ vi cat.c
        $ cvs diff -r1 file
      When trying this with Subversion:
        $ svn diff $Fh/bin/cat .
        svn: Target lists to diff may not contain both working copy paths and URLs
        $ svn diff $Fh/bin/cat
        svn: Not all required revisions are specified
      Answer: Use the svn diff --old --new syntax:
        $ cd /usr/src/bin/cat
        $ svn diff --old cat.c --new ^/releng/7.0/bin/cat/cat.c
  2. CVS provided more abbreviations for commands.
    •   $ svn info --depth immediates svn+ssh://svn.freebsd.org/base/stable/7
        $ svn info --depth empty svn+ssh://svn.freebsd.org/base/head
      Seems the Subversion developers are much better touch typists (and fast ones at that) than I am.

      1 and 0 should be abbreviations for immediates and empty.

  3. "Forced commits" are missing.
    • When one makes a commit and the log message is wrong (or missing), some shops have disabled cvs admin for users, and instead have use cvs ci -f. There appears to be no way to make a zero-change commit using Subversion.

  4. Subversion import is mostly useless.

    • svn import should keep in mind what CVS knew - vendor branches are valuable thing. svn import should have been a useful tool for repeated imports of a 3rd party based source drops. svn import could have been a nice feature if had the ability to see what files on the branch were missing from the files being imported - and then issued the equivalent of svn rm on them.

  5. Subversion does not let you copy-n-paste revision numbers from svn log:

    •   $ svn log foo
        ------------------------------------------------------------------------
        r325249 | deo | 2008-12-14 01:25:28 -0800 (Sun, 14 Dec 2008) | 1 line
        ..snip..
        # X copy-n-paste the "r325249" as my numbers typing isn't good...
        $ svn merge -c -r325249 .
        svn: Non-numeric change argument (-r325249) given to -c

      This is a stupid as CVS is in that you cannot give its date output from cvs log as-is as an argument to "-D".

      • Sean C. Farley < scf@FreeBSD.org > tells me that svn merge -cr325249 . does work. (Sean thanks for the info!) [Though I still think the Subversion parser need a clue-by-four.]

      Answer: svn merge -c -r42 is equivalent to svn merge -c -42, which performs a reverse-merge. The above parsing error was fixed in http://svn.apache.org/viewvc?view=revision&revision=1036032 (fix released in 1.7.0).

  6. Even sillier is that if I checkout a tree and make several commits from within the tree, svn log will not show them. An svn update must be done first. This is really annoying - even more so when doing a merge.

  7. Subversion does not automatically expand keywords.
    • One did not have to do anything to get $Id$ expanded using CVS. With Subversion one must explicitly do

    •   svn add foo.c
        svn propset svn:keywords "FreeBSD=%H" foo.c

      At least one can tweak ~/.subversion/config to add

        *.c = svn:eol-style=native; svn:keywords=FreeBSD=%H; svn:mime-type=text/plain
      But now ones config file is project specific.
  8. Some error output is useless:
    •   $ cd releng7/usr.bin/logger
        $ svn merge -c r175993 --record-only svn+ssh://svn.freebsd.org/base/head/usr.bin/loggger .
        svn: File not found: revision 182510, path '/head/usr.bin/loggger'
      That wasn't very helpful in figuring out I had a triple g's misspelling...
  9. There is no option at not having base files in .svn.
    • Thus you will always take up twice the disk space, and spend twice as long doing a check out or update than you need to be - if you're writing to NFS and your Subversion server is just as well, if not better, connected to the client system. This is a major issue at $WORK... Answer: A workaround that offers a partial remedy is to check out a single working copy for the entire freebsd repository at depth empty:
           $ svn co --depth empty svn://svn.freebsd.org/base
           $ cd base
      and then update desired branches to depth infinity:
           $ svn up --depth infinity head
           $ svn up --depth infinity releng/9.1
      With Subversion 1.7, files that don't differ between branches now share the same pristine text base file in the .svn directory.
  10. Subversion does not sort files in svn diff output alphabetically.

  11. I cannot figure out what svn log does within a directory [to understand the output].

    • It does not seem to give a combined log for the entire directory (or subtree) as I hoped it would.
  12. The barren set of 'diff' arguments is quite annoying. The set I often use with CVS are "-u9" to see more context of a diff, and "-Bbw" to not see white space changes. Additionally, I have "diff -p" in my ~/.cvsrc. Subversion has turned this into
    •   svn diff --diff-cmd diff -x -u9 -x -p -c 99 foo.c
    Even in the "typical" case, Subversion requires
    •   svn diff -x -p -c 99 foo.c

    Unfortunately, ~/.subversion/config does not seem to offer any relief from this. (Well, you can set "diff-cmd=/usr/bin/diff" and rely on one's DIFF_OPTIONS environmental variable setting, but then diff'ing is slower than it needs to be in the "typical" case.)

    • Answer: This was fixed in 1.7.0. See the 'diff-extensions' option in ~/.subversion/config (to view an up-to-date config template: svn help --config-dir /tmp/conf; less /tmp/conf/config)
  13. Why does Subversion bother to tell me the number of lines in a commit log message?
    •   r111464 | deo | 2009-01-28 14:45:42 -0800 (Wed, 28 Jan 2009) | 2 lines
      
        Merge blah into foo.
    I don't see the benefit in this output. Couldn't we get something more useful instead? Number of source lines changed in that commit for instance. Answer: This was done to help tools that parse svn log output. See the cvsps problem where its log message parser fails if a CVS log message contains a log-message-separator line...
  14. Many Subversion commands bail out in processing their command-line arguments if the command operation cannot be accomplished on a particular file.
    •   svn rm A B C
        D         A
        svn: 'B' does not exist
    Oh!, maybe I need to use --force (e.g. to operate like 'rm -rf').
    •   svn rm --force A B C
        D         A
        svn: 'B' does not exist
    Nope, same thing. This same stupidity also happens with 'svn propdel svn:executable *'. Thus forcing one to
    • for F in * ; do svn propdel -q svn:executable $F ; done
    The "-q" shuts up all the error messages that "svn: Attempting to delete nonexistent property 'svn:executable'". BUT, it also neuters the exit code. Thus one cannot know if it was able to perform the operation or not. So
    •   for F in *; do
        svn propdel -q svn:executable $F
        if [ $? -eq 0 ]; then echo "svn propdel svn:executable $F" ; fi
        done
    Does not work as desired:
    •   $ svn propdel svn:executable A
        svn: Attempting to delete nonexistent property 'svn:executable'
        $ echo $?
        1
        $ svn propdel -q svn:executable A
        $ echo $?
        0

SubversionMissing (last edited 2012-09-07 15:53:12 by StefanSperling)