Ubuntu Manpage: aegis new file - add new files to be created by a change

NAME

        aegis new file - add new files to be created by a change

SYNOPSIS

        aegis -New_File file-name...  [ option...  ]
        aegis -New_File -List [ option...  ]
        aegis -New_File -Help

DESCRIPTION

The aegis -New_File command is used to add new files to a change. The named files will
be added to the list of files in the change.

For each file named, a new file is created in the development directory, if it does not
exist already. If the file already exists, it will not be altered.

If you want a new source file to be executable (shell scripts, for example) then you
simply use the normal chmod(1) command. If any of the file's executable bits are set at
aede(1) time the file is remembered as executable and all execute bits (minus the
project's umask) will be set by subsequent aecp(1) commands.

If you name a directory on the command line, the entire directory tree will be searched
for new files. (Note: absolutely everything will be added, including dot files and
binary files, so you will need to clean out any junk first.) Files below this named
directory which are already in the change, or in the project, will be ignored. The
file_name_accept and file_name_reject patterns in the project aegis.conf file will also
be applied, see aepconf(5) for more information.

Directory Example
There are times when a command such as
$ aenf fubar/*
aegis: project "example": change 42: "fubar/glorp" already in change
aegis: project "example": change 42: found 1 fatal error, no new files added
$
will fail as shown. There are several ways to deal with this, the easiest being to
simply name the directory:
$ aenf fubar
aegis: project "example": change 42: file "fubar/smiley" added
aegis: project "example": change 42: file "fubar/frownie" added
$
You could also use the find(1) command for arbitrarily complex file selection, but you
must first exclude files that the above command excludes automatically:
$ aelcf > exclude
$ aelpf >> exclude
$ find fubar -type f | \
grep -v -f exclude | \
xargs aegis --new-file -v
aegis: project "example": change 42: file "fubar/smiley" added
aegis: project "example": change 42: file "fubar/frownie" added
$
If you aren't using the exclude list, the find(1) command will need fine tuning for your
development directory style. If you are using the symlink-style, you will need to add
the find -nlink 1 option in addition to the find -type f option.
$ find fubar -type f -nlinks 1 | \
xargs aegis --new-file -v
aegis: project "example": change 42: file "fubar/smiley" added
aegis: project "example": change 42: file "fubar/frownie" added
$
If you are using the full-copy development directory style, you will have to use the
exclude list method, above.

File Templates
When a new file is created in the development directory the project config file is
searched for a template for the new file. If a template is found, the new file will be
initialized to the template, otherwise it will be created empty. See aepconf(5) for more
information.

The simplest form is to use template files, such as
file_template =
[
{
pattern = [ "*.c" ];
body = "${read_file ${source template/c abs}}";
},
{
pattern = [ "test/*/.sh" ];
body = "${read_file ${source template/test abs}}";
},
];
As you can see, the template files are part of the project source, so you can add the
appropriate copyright notices, and wrappers, etc. The $source substitution locates them,
if they are not part of the current change (and they usually are not).

The template files themselves contain substitutions. The $filename substitution is
available, and contains the name of the file being created. This can be manipulated in
various ways when constructing the appropriate file contents. See aesub(5) for more
information about substitutions.

It is also possible to run a command to create the new file. You can do this instead of
specifying a body string, viz:
file_template =
[
{
pattern = [ "*" ];
body_command = "perl ${source template.pl abs} $filename";
},
];
The command is run with a current directory set to the top of the development directory.
It is an error if the command fails to create the file. You can mix-and-match the two
techniques, body string and body_command, if you want.

File Name Limitations
There are a number of controls available to limit the form of project file names. All of
these controls may be found in the project configuration file, see aepconf(5) for more
information. The most significant are briefly described here:

maximum_filename_length = integer;
This field is used to limit the length of filenames. All new files may not have
path components longer than this. Defaults to 255 if not set. For maximum
portability you should set this to 14.

posix_filename_charset = boolean;
This field may be used to limit the characters allowed in filenames to only those
explicitly allowed by POSIX. Defaults to false if not set, meaning whatever your
operating system will tolerate, except white space and high-bit-on characters.
For maximum portability you should set this to true.

dos_filename_required = boolean;
This field may be used to limit filenames so that they conform to the DOS 8+3
filename limits and to the DOS filename character set. Defaults to false if not
set.

windows_filename_required = boolean;
This field may be used to limit filenames so that they conform to the Windows98
and WindowsNT filename limits and character set. Defaults to false if not set.

shell_safe_filenames = boolean;
This field may be used to limit filenames so that they do not contain shell
special characters. Defaults to true if not set. If this field is set to false,
you will need to use the ${quote} substitution around filenames in commands, to
ensure that filenames containing shell special characters do not have unintended
side effects. Weird characters in filenames may also confuse your dependency
maintenance tool.

allow_white_space_in_filenames = boolean;
This field may be used to allow white space characters in file names. This will
allow the following characters to appear in file names: backspace (BS, \b, 0x08),
horizontal tab (HT, \t, 0x09), new line (NL, \n, 0x0A), vertical tab (VT, \v,
0x0B), form feed (FF, \f, 0x0C), and carriage return (CR, \r, 0x0D). Defaults to
false if not set.

Note that this field does not override other file name filters. It will be
necessary to explicitly set shell_safe_filenames = false as well. It will be
necessary to set dos_filename_required = false (the default) as well. It will be
necessary to set posix_filename_charset = false (the default) as well.

The user must take great care to use the ${quote} substitution around all file
names in commands in the project configuration. And even then, substitutions
which expect a space separated list of file names will have undefined results.

allow_non_ascii_filenames = boolean;
This field may be used to allow file names with non-ascii-printable characters in
them. Usually this would mean a UTF8 or international charset of some kind.
Defaults to false if not set.

filename_pattern_accept = [ string ];
This field is used to specify a list of patterns of acceptable filenames.
Defaults to "*" if not set.

filename_pattern_reject = [ string ];
This field is used to specify a list of patterns of unacceptable filenames.

Please Note: Aegis also consults the underlying file system, to determine its notion of
maximum file size. Where the file system's maximum file size is less than
maximum_filename_length, the filesystem wins. This can happen, for example, when you are
using the Linux UMSDOS file system, or when you have an NFS mounted an ancient V7
filesystem. Setting maximum_filename_length to 255 in these cases does not alter the
fact that the underlying file systems limits are far smaller (12 and 14, respectively).

If your development directories (or your whole project) is on filesystems with filename
limitations, or a portion of the heterogeneous builds take place in such an environment,
it helps to tell Aegis what they are (using the project config file's fields) so that you
don't run into the situation where the project builds on the more permissive
environments, but fails with mysterious errors in the more limited environments.

If your development directories are routinely on a Linux UMSDOS filesystem, you would
probably be better off setting dos_filename_required = true, and also changing the
development_directory_template field. Heterogeneous development with various Windows
environments may also require this.

File Name Interpretation
The aegis program will attempt to determine the project file names from the file names
given on the command line. All file names are stored within aegis projects as relative
to the root of the baseline directory tree. The development directory and the
integration directory are shadows of this baseline directory, and so these relative names
apply here, too. Files named on the command line are first converted to absolute paths
if necessary. They are then compared with the baseline path, the development directory
path, and the integration directory path, to determine a baseline-relative name. It is
an error if the file named is outside one of these directory trees.

The -BAse_RElative option may be used to cause relative filenames to be interpreted as
relative to the baseline path; absolute filenames will still be compared with the various
paths in order to determine a baseline-relative name.

The relative_filename_preference in the user configuration file may be used to modify
this default behavior. See aeuconf(5) for more information.

Changing the Type of a File
If you want to change the type of a file (say, from a test to a source file, or vice
versa) you could do it as two changes, by first using aerm(1) in one change and then
using aenf(1) or aent(1) in a second change, or you can combine both steps in the same
change. Remember to use the aerm -nowhiteout option or you will get a most peculiar new
file template.

File Action Adjustment
When this command runs, it first checks the change files against the projects files. If
there are inconsistencies, the file actions will be adjusted as follows:

create If a file is being created, but another change set is integrated which also
creates the file, the file action in the change set still being developed will be
adjusted to "modify".

modify If a file is being modified, but another change set is integrated which removes
the file, the file action in the change set still being developed will be
adjusted to "create".

remove If a file is being removed, but another change set is integrated which removes
the file, the file will be dropped from the change set still being developed.

Notification
The new_file_command in the project configuration file is run, if set. The project_‐
file_command is also run, if set, and if there has been an integration recently. See
aepconf(5) for more information.

TEST CORRELATIONS

The “aegis -Test -SUGgest” command may be used to have aegis suggest suitable regression
tests for your change, based on the source files in your change. This automatically
focuses testing effort to relevant tests, reducing the number of regression tests
necessary to be confident that you have not introduced a bug.

The test correlations are generated by the “aegis -Integrate_Pass” command, which
associates each test in the change with each source file in the change. Thus, each
source file accumulates a list of tests which have been associated with it in the past.
This is not as exact as code coverage analysis, but is a reasonable approximation in
practice.

The aecp(1) and aenf(1) commands are used to associate files with a change. While they
do not actively perform the association, these are the files used by aeipass(1) and
aet(1) to determine which source files are associated with which tests.

Test Correlation Accuracy
Assuming that the testing correlations are accurate and that the tests are evenly
distributed across the function space, there will be a less than 1/number chance that a
relevant test has not been run by the “aegis -Test -SUGgest number” command. A small
amount of noise is added to the test weighting, so that unexpected things are sometimes
tested, and the same tests are not run every time.

Test correlation accuracy can be improved by ensuring that:

• Each change should be strongly focused, with no gratuitous file inclusions. This
avoids spurious correlations.

• Each item of new functionality should be added in an individual change, rather than
several together. This strongly correlates tests with functionality.

• Each bug should be fixed in an individual change, rather than several together. This
strongly correlates tests with functionality.

• Test correlations will be lost if files are moved. This is because correlations are by
name.

The best way for tests to correlate accurately with source files is when a change
contains a test and exactly those files relating to the functionality under test. Too
many spurious files will weaken the usefulness of the testing correlations.

OPTIONS

The following options are understood

-Build
This option may be used to specify that the file is constructed during a build
(often only an integrate build), so that history of it may be kept. This is
useful for generating patch files, where a history of generated files is
important. Files created in this way may not be copied into a change, though
they may be deleted. Avoid using files of this type, if at all possible.

-BAse_RElative
This option may be used to cause relative filenames to be considered relative to
the base of the source tree. See aeuconf(5) for the corresponding user
preference.

-CUrrent_RElative
This option may be used to cause relative filenames to be considered relative to
the current directory. This is usually the default. See aeuconf(5) for the
corresponding user preference.

-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.

-CONFIGured
This option may be used to specify that the file is an Aegis project
configuration file. The default project configuration file is called aegis.conf,
however any file name may be used. You may also use more than one file,
splitting the content across several files, all of which must be of this type.

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

-Keep
This option may be used to retain files and/or directories usually deleted or
replaced by the command. Defaults to the user's delete_file_preference if not
specified, see aeuconf(5) for more information.

-No_Keep
This option may be used to ensure that the files and/or directories are deleted
or replaced by the command. Defaults to the user's delete_file_preference if not
specified, see aeuconf(5) for more information.

-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.

-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.

-TEMplate
This option may be used to specify that a new file template should be used, even
if the file already exists.

-No_TEMplate
This option may be used to specify that a new file template should not be used,
even if the file does not exist (any empty file will be created).

-TERse
This option may be used to cause listings to produce the bare minimum of
information. It is usually useful for shell scripts.

-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.

RECOMMENDED ALIAS

        The recommended alias for this command is
        csh%    alias aenf 'aegis -nf \!* -v'
        sh$     aenf(){aegis -nf "$@" -v}

ERRORS

        It is an error if the change is not in the being developed state.
        It is an error if the change is not assigned to the current user.
        It is an error if the file is already part of the change.
        It is an error if the file is already part of the baseline.
        It is an error if the files named on the command line are not normal files and not
        directories.  (If you need symbolic links or special files, create them at build time.)

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.

AUTHOR

        Peter Miller   E-Mail:   millerp@canb.auug.org.au
        /\/\*             WWW:   http://www.canb.auug.org.au/~millerp/