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Diffstat (limited to 'Documentation/git-cvsserver.txt')
| -rw-r--r-- | Documentation/git-cvsserver.txt | 168 |
1 files changed, 102 insertions, 66 deletions
diff --git a/Documentation/git-cvsserver.txt b/Documentation/git-cvsserver.txt index 88d814af0e..4dc57ed254 100644 --- a/Documentation/git-cvsserver.txt +++ b/Documentation/git-cvsserver.txt @@ -3,7 +3,7 @@ git-cvsserver(1) NAME ---- -git-cvsserver - A CVS server emulator for git +git-cvsserver - A CVS server emulator for Git SYNOPSIS -------- @@ -22,7 +22,19 @@ cvspserver stream tcp nowait nobody /usr/bin/git-cvsserver git-cvsserver pserver Usage: [verse] -'git-cvsserver' [options] [pserver|server] [<directory> ...] +'git-cvsserver' [<options>] [pserver|server] [<directory> ...] + +DESCRIPTION +----------- + +This application is a CVS emulation layer for Git. + +It is highly functional. However, not all methods are implemented, +and for those methods that are implemented, +not all switches are implemented. + +Testing has been done using both the CLI CVS client, and the Eclipse CVS +plugin. Most functionality works fine with both of these clients. OPTIONS ------- @@ -54,27 +66,15 @@ Print usage information and exit You can specify a list of allowed directories. If no directories are given, all are allowed. This is an additional restriction, gitcvs access still needs to be enabled by the `gitcvs.enabled` config option -unless '--export-all' was given, too. - +unless `--export-all` was given, too. -DESCRIPTION ------------ - -This application is a CVS emulation layer for git. - -It is highly functional. However, not all methods are implemented, -and for those methods that are implemented, -not all switches are implemented. - -Testing has been done using both the CLI CVS client, and the Eclipse CVS -plugin. Most functionality works fine with both of these clients. LIMITATIONS ----------- -CVS clients cannot tag, branch or perform GIT merges. +CVS clients cannot tag, branch or perform Git merges. -'git-cvsserver' maps GIT branches to CVS modules. This is very different +'git-cvsserver' maps Git branches to CVS modules. This is very different from what most CVS users would expect since in CVS modules usually represent one or more directories. @@ -99,7 +99,7 @@ looks like ------ -Only anonymous access is provided by pserve by default. To commit you +Only anonymous access is provided by pserver by default. To commit you will have to create pserver accounts, simply add a gitcvs.authdb setting in the config file of the repositories you want the cvsserver to allow writes to, for example: @@ -110,27 +110,26 @@ to allow writes to, for example: authdb = /etc/cvsserver/passwd ------ -The format of these files is username followed by the crypted password, +The format of these files is username followed by the encrypted password, for example: ------ - myuser:$1Oyx5r9mdGZ2 - myuser:$1$BA)@$vbnMJMDym7tA32AamXrm./ + myuser:sqkNi8zPf01HI + myuser:$1$9K7FzU28$VfF6EoPYCJEYcVQwATgOP/ + myuser:$5$.NqmNH1vwfzGpV8B$znZIcumu1tNLATgV2l6e1/mY8RzhUDHMOaVOeL1cxV3 ------ You can use the 'htpasswd' facility that comes with Apache to make these -files, but Apache's MD5 crypt method differs from the one used by most C -library's crypt() function, so don't use the -m option. +files, but only with the -d option (or -B if your system suports it). -Alternatively you can produce the password with perl's crypt() operator: ------ - perl -e 'my ($user, $pass) = @ARGV; printf "%s:%s\n", $user, crypt($user, $pass)' $USER password ------ +Preferably use the system specific utility that manages password hash +creation in your platform (e.g. mkpasswd in Linux, encrypt in OpenBSD or +pwhash in NetBSD) and paste it in the right location. Then provide your password via the pserver method, for example: ------ - cvs -d:pserver:someuser:somepassword <at> server/path/repo.git co <HEAD_name> + cvs -d:pserver:someuser:somepassword@server:/path/repo.git co <HEAD_name> ------ -No special setup is needed for SSH access, other than having GIT tools +No special setup is needed for SSH access, other than having Git tools in the PATH. If you have clients that do not accept the CVS_SERVER environment variable, you can rename 'git-cvsserver' to `cvs`. @@ -138,7 +137,7 @@ Note: Newer CVS versions (>= 1.12.11) also support specifying CVS_SERVER directly in CVSROOT like ------ -cvs -d ":ext;CVS_SERVER=git cvsserver:user@server/path/repo.git" co <HEAD_name> + cvs -d ":ext;CVS_SERVER=git cvsserver:user@server/path/repo.git" co <HEAD_name> ------ This has the advantage that it will be saved in your 'CVS/Root' files and you don't need to worry about always setting the correct environment @@ -154,15 +153,15 @@ with CVS_SERVER (and shouldn't) as 'git-shell' understands `cvs` to mean [gitcvs] enabled=1 # optional for debugging - logfile=/path/to/logfile + logFile=/path/to/logfile ------ Note: you need to ensure each user that is going to invoke 'git-cvsserver' has write access to the log file and to the database (see <<dbbackend,Database Backend>>. If you want to offer write access over -SSH, the users of course also need write access to the git repository itself. +SSH, the users of course also need write access to the Git repository itself. -You also need to ensure that each repository is "bare" (without a git index +You also need to ensure that each repository is "bare" (without a Git index file) for `cvs commit` to work. See linkgit:gitcvs-migration[7]. [[configaccessmethod]] @@ -181,13 +180,13 @@ allowing access over SSH. 3. If you didn't specify the CVSROOT/CVS_SERVER directly in the checkout command, automatically saving it in your 'CVS/Root' files, then you need to set them explicitly in your environment. CVSROOT should be set as per normal, but the - directory should point at the appropriate git repo. As above, for SSH clients + directory should point at the appropriate Git repo. As above, for SSH clients _not_ restricted to 'git-shell', CVS_SERVER should be set to 'git-cvsserver'. + -- ------ - export CVSROOT=:ext:user@server:/var/git/project.git - export CVS_SERVER="git cvsserver" + export CVSROOT=:ext:user@server:/var/git/project.git + export CVS_SERVER="git cvsserver" ------ -- 4. For SSH clients that will make commits, make sure their server-side @@ -197,20 +196,20 @@ allowing access over SSH. shell is bash, .bashrc may be a reasonable alternative. 5. Clients should now be able to check out the project. Use the CVS 'module' - name to indicate what GIT 'head' you want to check out. This also sets the + name to indicate what Git 'head' you want to check out. This also sets the name of your newly checked-out directory, unless you tell it otherwise with `-d <dir_name>`. For example, this checks out 'master' branch to the `project-master` directory: + ------ - cvs co -d project-master master + cvs co -d project-master master ------ [[dbbackend]] -Database Backend +DATABASE BACKEND ---------------- -'git-cvsserver' uses one database per git head (i.e. CVS module) to +'git-cvsserver' uses one database per Git head (i.e. CVS module) to store information about the repository to maintain consistent CVS revision numbers. The database needs to be updated (i.e. written to) after every commit. @@ -223,16 +222,16 @@ access method and requested operation. That means that even if you offer only read access (e.g. by using the pserver method), 'git-cvsserver' should have write access to the database to work reliably (otherwise you need to make sure -that the database is up-to-date any time 'git-cvsserver' is executed). +that the database is up to date any time 'git-cvsserver' is executed). -By default it uses SQLite databases in the git directory, named +By default it uses SQLite databases in the Git directory, named `gitcvs.<module_name>.sqlite`. Note that the SQLite backend creates temporary files in the same directory as the database file on write so it might not be enough to grant the users using 'git-cvsserver' write access to the database file without granting them write access to the directory, too. -The database can not be reliably regenerated in a +The database cannot be reliably regenerated in a consistent form after the branch it is tracking has changed. Example: For merged branches, 'git-cvsserver' only tracks one branch of development, and after a 'git merge' an @@ -254,14 +253,14 @@ Configuring database backend its documentation if changing these variables, especially about `DBI->connect()`. -gitcvs.dbname:: +gitcvs.dbName:: Database name. The exact meaning depends on the selected database driver, for SQLite this is a filename. Supports variable substitution (see below). May not contain semicolons (`;`). Default: '%Ggitcvs.%m.sqlite' -gitcvs.dbdriver:: +gitcvs.dbDriver:: Used DBI driver. You can specify any available driver for this here, but it might not work. cvsserver is tested with 'DBD::SQLite', reported to work with @@ -271,12 +270,12 @@ gitcvs.dbdriver:: Default: 'SQLite' gitcvs.dbuser:: - Database user. Only useful if setting `dbdriver`, since + Database user. Only useful if setting `dbDriver`, since SQLite has no concept of database users. Supports variable substitution (see below). -gitcvs.dbpass:: - Database password. Only useful if setting `dbdriver`, since +gitcvs.dbPass:: + Database password. Only useful if setting `dbDriver`, since SQLite has no concept of database passwords. gitcvs.dbTableNamePrefix:: @@ -288,17 +287,17 @@ All variables can also be set per access method, see <<configaccessmethod,above> Variable substitution ^^^^^^^^^^^^^^^^^^^^^ -In `dbdriver` and `dbuser` you can use the following variables: +In `dbDriver` and `dbUser` you can use the following variables: %G:: - git directory name + Git directory name %g:: - git directory name, where all characters except for - alpha-numeric ones, `.`, and `-` are replaced with + Git directory name, where all characters except for + alphanumeric ones, `.`, and `-` are replaced with `_` (this should make it easier to use the directory name in a filename if wanted) %m:: - CVS module/git head name + CVS module/Git head name %a:: access method (one of "ext" or "pserver") %u:: @@ -321,7 +320,7 @@ git-cvsserver, as described above. When these environment variables are set, the corresponding command-line arguments may not be used. -Eclipse CVS Client Notes +ECLIPSE CVS CLIENT NOTES ------------------------ To get a checkout with the Eclipse CVS client: @@ -332,7 +331,7 @@ To get a checkout with the Eclipse CVS client: 3. Browse the 'modules' available. It will give you a list of the heads in the repository. You will not be able to browse the tree from there. Only the heads. -4. Pick 'HEAD' when it asks what branch/tag to check out. Untick the +4. Pick `HEAD` when it asks what branch/tag to check out. Untick the "launch commit wizard" to avoid committing the .project file. Protocol notes: If you are using anonymous access via pserver, just select that. @@ -346,7 +345,7 @@ offer. In that case CVS_SERVER is ignored, and you will have to replace the cvs utility on the server with 'git-cvsserver' or manipulate your `.bashrc` so that calling 'cvs' effectively calls 'git-cvsserver'. -Clients known to work +CLIENTS KNOWN TO WORK --------------------- - CVS 1.12.9 on Debian @@ -354,40 +353,77 @@ Clients known to work - Eclipse 3.0, 3.1.2 on MacOSX (see Eclipse CVS Client Notes) - TortoiseCVS -Operations supported +OPERATIONS SUPPORTED -------------------- All the operations required for normal use are supported, including checkout, diff, status, update, log, add, remove, commit. + +Most CVS command arguments that read CVS tags or revision numbers +(typically -r) work, and also support any git refspec +(tag, branch, commit ID, etc). +However, CVS revision numbers for non-default branches are not well +emulated, and cvs log does not show tags or branches at +all. (Non-main-branch CVS revision numbers superficially resemble CVS +revision numbers, but they actually encode a git commit ID directly, +rather than represent the number of revisions since the branch point.) + +Note that there are two ways to checkout a particular branch. +As described elsewhere on this page, the "module" parameter +of cvs checkout is interpreted as a branch name, and it becomes +the main branch. It remains the main branch for a given sandbox +even if you temporarily make another branch sticky with +cvs update -r. Alternatively, the -r argument can indicate +some other branch to actually checkout, even though the module +is still the "main" branch. Tradeoffs (as currently +implemented): Each new "module" creates a new database on disk with +a history for the given module, and after the database is created, +operations against that main branch are fast. Or alternatively, +-r doesn't take any extra disk space, but may be significantly slower for +many operations, like cvs update. + +If you want to refer to a git refspec that has characters that are +not allowed by CVS, you have two options. First, it may just work +to supply the git refspec directly to the appropriate CVS -r argument; +some CVS clients don't seem to do much sanity checking of the argument. +Second, if that fails, you can use a special character escape mechanism +that only uses characters that are valid in CVS tags. A sequence +of 4 or 5 characters of the form (underscore (`"_"`), dash (`"-"`), +one or two characters, and dash (`"-"`)) can encode various characters based +on the one or two letters: `"s"` for slash (`"/"`), `"p"` for +period (`"."`), `"u"` for underscore (`"_"`), or two hexadecimal digits +for any byte value at all (typically an ASCII number, or perhaps a part +of a UTF-8 encoded character). + Legacy monitoring operations are not supported (edit, watch and related). Exports and tagging (tags and branches) are not supported at this stage. CRLF Line Ending Conversions ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -By default the server leaves the '-k' mode blank for all files, +By default the server leaves the `-k` mode blank for all files, which causes the CVS client to treat them as a text files, subject to end-of-line conversion on some platforms. You can make the server use the end-of-line conversion attributes to -set the '-k' modes for files by setting the `gitcvs.usecrlfattr` +set the `-k` modes for files by setting the `gitcvs.usecrlfattr` config variable. See linkgit:gitattributes[5] for more information about end-of-line conversion. Alternatively, if `gitcvs.usecrlfattr` config is not enabled or the attributes do not allow automatic detection for a filename, then -the server uses the `gitcvs.allbinary` config for the default setting. -If `gitcvs.allbinary` is set, then file not otherwise -specified will default to '-kb' mode. Otherwise the '-k' mode -is left blank. But if `gitcvs.allbinary` is set to "guess", then -the correct '-k' mode will be guessed based on the contents of +the server uses the `gitcvs.allBinary` config for the default setting. +If `gitcvs.allBinary` is set, then file not otherwise +specified will default to '-kb' mode. Otherwise the `-k` mode +is left blank. But if `gitcvs.allBinary` is set to "guess", then +the correct `-k` mode will be guessed based on the contents of the file. For best consistency with 'cvs', it is probably best to override the defaults by setting `gitcvs.usecrlfattr` to true, -and `gitcvs.allbinary` to "guess". +and `gitcvs.allBinary` to "guess". -Dependencies +DEPENDENCIES ------------ 'git-cvsserver' depends on DBD::SQLite. |