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PROGRAM:

NAME


aegis clEan - clean files from development directory

SYNOPSIS


aegis -CLEan [ option... ]
aegis -CLEan -Help
aegis -VERSion

DESCRIPTION


The aegis -CLEan command is used to remove all files which are not change source files
from a development directory. This can be used to obtain a “clean” development directory
before a final build, to ensure that a change is ready to end development. A new build
will be required.

This command is only allowed in the “being developed” state, and only the change's
developer may issue it. It may not be applied to branches.

All symbolic links will be removed from the development directory, even if remove_‐
symlinks_after_build = false in the project config file. The symbolic links will be re-
installed, if create_symlinks_before_build = true. This is to ensure that the symlinks
are accurate, and that unnecessary ones are removed.

All special device files, pipes and sockets will be removed. These files cannot be
source files, and it is expected that the following build will restore them.

All derived files created by previous builds of the change will be removed. It is
expected that the following build will recreate them. Any temporary files you may have
created in the development directory will also be removed.

The develop_begin_command in the project configuration file (see aepconf(5) for more
information) will be run, if there is one. The change_file_command will be run, if there
is one. The project_file_command will be run, if there is one.

You will be warned if any of the files are out-of-date and need to be merged. You will
be warned if any files need to be differenced.

SYMBOLIC LINKS


Many dependency maintenance tools, and indeed some compilers, have little or no support
for include file search paths, and thus for the concept of the two-level directory
hierarchy employed by Aegis. (It becomes multi-level when Aegis' branching functionality
is used.) To allow these tools to be used, Aegis provides the ability to maintain a set
of symbolic links between the development directory of a change and the baseline of a
project, so it appears to these tools that all of the project's files are present in the
development directory.

Project Configuration
The development_directory_style field of the project configuration file controls the
appearance of the development directory. See aepconf(5) for more information.

By using a setting such as
development_directory_style =
{
source_file_symlink = true;
during_build_only = true;
};
the user never sees the symbolic links, because they are added purely for the benefit of
the dependency maintenance tool during the execution of the aeb(1) command.

By using a setting such as
development_directory_style =
{
source_file_symlink = true;
};
(the other will default to false) the symbolic links will be created at develop begin
time (see aedb(1) for more information) and also maintained by each aeb(1) invocation.
Note that the symbolic links are only maintained at these times, so project integrations
during the course of editing change sourec files may leave the symbolic links in an
inconsistent state until the next build.

When files are copied from the baseline into a change, using the aecp(1) command, the
symbolic link pointing into the baseline, if any, will be removed before the file is
copied.

Note: Using this functionality in either form has implications for how the rules file of
the dependency maintenance tool is written. Rules must remove their targets before
creating them (usually with an rm -f command) if you use any of the link sub-fields (both
hard links and symbolic links). This is to avoid attempting to write the result on the
symbolic link, which will point at a read-only file in the project baseline. This is
similar to the same requirement for using the link_integration_directory field of the
project configuration file.

User Configuration
There is a symbolic_link_preference field in the user configuration file (see aeuconf(5)
for more information). This controls whether aeb(1) will verify the symbolic links
before the build (default) or whether it will assume they are up-to-date. (This field is
only relevant if development_directory__style.source_file_symlink is true.)

For medium-to-large projects, verifying the symbolic links can take as long as the build
itself. Assuming the symbolic links are up-to-date can be a large time-saving for these
projects. It may be advisable to review your choice of DMT in such a situation.

The aedb(1) command does not consult this preference. Thus, in most situations, the
symbolic links will be up-to-date when the build is performed. The only Aegis function
which may result in the symbolic links becoming out-of-date is the integration of another
change, as this may alter the presence or absence of files in the baseline. In this
situation, the default aeb(1) action is to ignore the user preference and the verify
symbolic links.

There are two command line options which modify aeb(1) behavior further: the -Verify-
Symbolic-Links option says to verify the symbolic links; and the -Assume-Symbolic-Links
option says to assume the symbolic links are up-to-date. In each case the option over-
rides the default and the user preference.

It is possible to obtain behaviour similar to Tom Lord'a Arch by using a setting such as:
development_directory_style =
{
source_file_link = true;
source_file_symlink = true;
};

It is possible to obtain behaviour similar to CVS by using a setting such as:
development_directory_style =
{
source_file_copy = true;
};
There are many more possible configurations of the development_directory_style, usually
with helpful build side-effects. See aepconf(1) and the Depenedency Maintenance Tool
chapter of the User Guide for more information.

The symbolic link command line options and preferences apply equally to hard links and
file copies (the names have historical origins).

Notification
The notification commands that would be run by the aecp(1), aedb(1), aenf(1), aent(1) and
aerm(1) commands are run, as appropriate. The project_file_command is also run, if set.
See aepconf(5) for more information.

OPTIONS


The following options are understood:

-Change number
This option may be used to specify a particular change within a project. See
aegis(1) for a complete description of this option.

-Help
This option may be used to obtain more information about how to use the aegis
program.

-List
This option may be used to obtain a list of suitable subjects for this command.
The list may be more general than expected.

-Not_Logging
This option may be used to disable the automatic logging of output and errors to
a file. This is often useful when several aegis commands are combined in a shell
script.

-TOuch This option may be used to request that each change source file have its last-
modified time-stamp be updated to the current time. This is the default.
Derived files and other non-source file are left alone.

-No_TOuch
This option may be used to request that the last-modified time-stamp of each
source file be left unmodified.

-MINIMum
This option may be used to request a minimum set of symbolic links, when the
create_symlinks_to_baseline functions are being used. This is useful if you want
to simulate something like aeib -minimum in the development directory. This
option is not meaningful if symbolic links are not being used.

This option also says not to remove normal files which occlude project source
files. This is a common technique used to temporarily over-ride project source
files. The “aecp -read-only” command would have been more appropriate.

-Project name
This option may be used to select the project of interest. When no -Project
option is specified, the AEGIS_PROJECT environment variable is consulted. If
that does not exist, the user's $HOME/.aegisrc file is examined for a default
project field (see aeuconf(5) for more information). If that does not exist,
when the user is only working on changes within a single project, the project
name defaults to that project. Otherwise, it is an error.

-Verbose
This option may be used to cause aegis to produce more output. By default aegis
only produces output on errors. When used with the -List option this option
causes column headings to be added.

-Wait This option may be used to require Aegis commands to wait for access locks, if
they cannot be obtained immediately. Defaults to the user's lock_wait_preference
if not specified, see aeuconf(5) for more information.

-No_Wait
This option may be used to require Aegis commands to emit a fatal error if access
locks cannot be obtained immediately. Defaults to the user's
lock_wait_preference if not specified, see aeuconf(5) for more information.

See also aegis(1) for options common to all aegis commands.

All options may be abbreviated; the abbreviation is documented as the upper case letters,
all lower case letters and underscores (_) are optional. You must use consecutive
sequences of optional letters.

All options are case insensitive, you may type them in upper case or lower case or a
combination of both, case is not important.

For example: the arguments "-project, "-PROJ" and "-p" are all interpreted to mean the
-Project option. The argument "-prj" will not be understood, because consecutive
optional characters were not supplied.

Options and other command line arguments may be mixed arbitrarily on the command line,
after the function selectors.

The GNU long option names are understood. Since all option names for aegis are long,
this means ignoring the extra leading '-'. The "--option=value" convention is also
understood.

EXIT STATUS


The aegis command will exit with a status of 1 on any error. The aegis command will only
exit with a status of 0 if there are no errors.

ENVIRONMENT VARIABLES


See aegis(1) for a list of environment variables which may affect this command. See
aepconf(5) for the project configuration file's project_specific field for how to set
environment variables for all commands executed by Aegis.

COPYRIGHT


aegis version 4.24.3.D001
Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Peter Miller

The aegis program comes with ABSOLUTELY NO WARRANTY; for details use the 'aegis -VERSion
License' command. This is free software and you are welcome to redistribute it under
certain conditions; for details use the 'aegis -VERSion License' command.

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