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Default options and the ~/.cvsrc file
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   There are some `command_options' that are used so often that you
might have set up an alias or some other means to make sure you always
specify that option.  One example (the one that drove the
implementation of the `.cvsrc' support, actually) is that many people
find the default output of the `diff' command to be very hard to read,
and that either context diffs or unidiffs are much easier to understand.

   The `~/.cvsrc' file is a way that you can add default options to
`cvs_commands' within cvs, instead of relying on aliases or other shell
scripts.

   The format of the `~/.cvsrc' file is simple.  The file is searched
for a line that begins with the same name as the `cvs_command' being
executed.  If a match is found, then the remainder of the line is split
up (at whitespace characters) into separate options and added to the
command arguments _before_ any options from the command line.

   If a command has two names (e.g., `checkout' and `co'), the official
name, not necessarily the one used on the command line, will be used to
match against the file.  So if this is the contents of the user's
`~/.cvsrc' file:

     log -N
     diff -u
     update -P
     checkout -P

the command `cvs checkout foo' would have the `-P' option added to the
arguments, as well as `cvs co foo'.

   With the example file above, the output from `cvs diff foobar' will
be in unidiff format.  `cvs diff -c foobar' will provide context diffs,
as usual.  Getting "old" format diffs would be slightly more
complicated, because `diff' doesn't have an option to specify use of
the "old" format, so you would need `cvs -f diff foobar'.

   In place of the command name you can use `cvs' to specify global
options (Note: Global options).  For example the following line in
`.cvsrc'

     cvs -z6

   causes CVS to use compression level 6.