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<! Style Sheet Header>
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<html>
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<head>
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<title>Requirements.html</title>
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<body bgcolor="beige">
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<! End Style Sheet Header -----------Insert Text Here --------------------->
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<center>
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<H1>SCRAM</H1>
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<font color=red>S</font>oftware <font color=red>C</font>onfiguration,
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<font color=red>R</font>elease <font color=red>A</font>nd
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<font color=red>M</font>anagement
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</center>
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<hr>
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This is the orignal list of functional requirements that the SCRAM project
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is supposed to
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address, along with the current status as regards implementation.
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<p>
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<table border=1>
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<tr>
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<th>
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Requirement
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</th>
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<th>
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Implementation Status
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</th>
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</tr>
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<tr>
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<td>
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<li>Support Any Project Configuration
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</td>
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<td>
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SCRAM provides a background functionality with a project interface. The
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project interface allows tailoring the system to a wide range of project
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structures through the use of SCRAM project classes.
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Project classes are implemented currently as GNUmakefiles and are expected
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to differ between projects. They are stored in the project, not in SCRAM.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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Shall be easy to use. The user/developer should have
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a very simple easily learnt interface.
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</td>
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<td>
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Most frontline scram functionality is reached through the <b>scram</b> command.
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Online help makes it easy to find out what commands are available and how
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to use them. The exact functionality of some of the commands are somewhat
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dependent on the project configuration. There is currently no easy way of
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providing online help as to exactly what this is without relying on the
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project administrator to document it carefully.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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Shall provide an easy to use mechanism to select specific versions
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of any build objects<p>
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<li>
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Shall obtain build objects from all available resources
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transparently (e.g Local installation, Central Installation,
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ftp archive etc. etc.)
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</td>
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<td>
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SCRAM uses the popular idea of developer and common build areas. Selection
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of specific files etc. is left to the projects versioning system (e.g. CVS).
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<p>
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Setting up specific external products etc. is handled with a special mechanism.
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Every product has a special SCRAM description file which specifies such things
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as library configurations, standard locations, environment requirements etc.
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Once such a file exists then a <em>'scram setup url'</em> command
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will download it into your development space and
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set it up for your environment ready for use. <br>
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Once it is tested and the tool is to be made available to the entire project,
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its name/url should be added to the 'project requirements' file via the
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<Require > tag.<br>
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<em>Current limitations</em><br>
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The url mechanism is limited to a simple toolname which corresponds to a file
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in the current SCRAM toolbox area. <br>
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Future developments will allow any url (e.g file:, http:) to be specified.
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This will allow description files to be stored anywhere on the net for use
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between different projects that use the same external product.
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<p>
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Specifying a product to be used once its installed can be done via the
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BuildFile and a special <External name=<em>toolname</em>> tag. This will
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soon be depreciated to simplyfy the interface to be replaced with the
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<Use external=> tag.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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Shall obtain required build objects in the most efficient manner
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</td>
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<td>
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This requirement really
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was designed to consider wether it would be quicker to build a local copy than
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wait for a slow network connection when working against a central
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installation. As yet no such intelligence is used - a local copy is always
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assumed for the developers and a full build is required for any setup of a
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remote development site.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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Linking against central installations and external software shall
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be transparent to the user.
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</td>
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<td>
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Fully implemented.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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A mechanism should be provided to allow a user to override default
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build instructions. (e.g. Build a shared rather than an archive library
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for a specific package and/or domain, try out new tools etc.)
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</td>
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<td>
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All libraries and binaries can be built in debug, optimised or Insure++ modes.
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This can be done in parrallel - no need for seperate development areas.
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Which of these are to be built by default is specified in the project level
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setup.
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In the
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directory corresponding to the library, overriding the default is simply a
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matter of specifying the appropriate
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<em>lib, lib_debug, lib_insure</em> arguments to the 'scram build' command.
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Similarly for the binaries with <em>bin, bin_debug, bin_insure</em>.
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<p>
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Building from the top level, overriding defaults gets clumsy.
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Things here need to be improved to provide a consistent interface.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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Support builds on multiple "platforms" with multiple compilers and QA-tools
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<p>
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<li>
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Shall be easily extendible to include new "Object Validation"
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tools and SW process support tools
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</td>
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<td>
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Multiple platforms are supported. Choice of compilers etc. is made at the
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project level. Compiler types/QA tool are currently hardcoded in although
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future developments will require a tool description file for each
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so that any such tool can be easily installed/used with the scram setup
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command as with any other external product.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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shall allow for bug-fixing of major releases.
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<p>
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<li>
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Shall support releases of movable "Taggged Objects"
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(e.g. alpha beta etc.) i.e tags that can indicate different objects
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with time.
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<p>
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<li>
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support "Tagged Objects" with major, minor and
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bug-fix versions
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</td>
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<td>
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Any development area can be turned into a central release by the
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co-ordinator with the <em>scram install</em> command. For each release
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a 'requirements document' and 'Bootstrap file' are required to allow the
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specify external requirements, environment, appropriate versions and
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automated dowload/setup information.
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<p>
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SCRAM does not interfere in any way with the version control system and so
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any tagging allowed by the system is allowed in SCRAM.
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<br>
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Currently the process of creating/validating these files is not yet automated.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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Provide build support for the different levels of testing.
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</td>
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<td>
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SCRAM does not dirrectly provide this, however it does allow the project to
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be configured to allow this by defining its own test classes and how such
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classes are called.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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support multiple "release" types
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(e.g user release, developer release) defined by the project
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configuration.
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</td>
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<td>
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This can be achieved through seperate combinations of
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'BootStrap' and 'Requirements' files. It is envisioned that a better
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mechanism than this will be developed.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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All build objects in a public release must be made available to be
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picked up by remote sites - i.e need a "distribution system"
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</td>
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<td>
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Partially implemented, through the BootStrap file. Automated downloading
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of binaries/libs etc is not yet implemented. Src code is available from
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the version control system - automatically directed by the BootStrapFile.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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provide automated release documentation
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</td>
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<td>
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Partially Implemented. SGML documents are required to give functionality,
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in particular in regards to the release is the Requirements Document. Converting
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to HTML or other format would certianly be possible although not yet
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implemented. Release logging is also intended although not yet implemented.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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shall be time-efficiency optimised for the work of the
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release manager.
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</td>
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<td>
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SCRAM reduces the work of the release manager in a number of ways.
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<p>
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e.g. The build environment has to be stated explicitly in the SCRAM project
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files - no more hunting down special features of some developers environment.
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<p>
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Works directly from the src tree as seen in the versioning system. No need
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to create special units for each individual package.
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<p>
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Coming - automated BootStrap file generation and documentation
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to describe the release.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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shall allow a public release to be compiled for many different
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platforms from a single platform. (e.g. the use of architecture
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specific/Backward compatability switches in compilers)
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</td>
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<td>
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Not yet. You still have to log onto each seperate machine and 'scram build'.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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shall support arbitrary naming for sub-directories containing
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header files
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</td>
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<td>
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SCRAM does not place any limitations. This is defined at the project level.
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</td>
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</tr>
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<tr>
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<td>
|
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<li>
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shall support arbitrary combinations of extensions for header
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and source files
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</td>
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<td>
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SCRAM however has hardoded some extensions to match certain operations
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(e.g .cc .C .cpp all mean C++ src code).
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As the file extensions etc. are decided at the project level there is
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not problem with the project level configuration files converting these
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extensions to those required by scram with a little fancy GNUmakefile.
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</td>
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</tr>
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<tr>
|
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<td>
|
| 284 |
<li>
|
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shall be independent of the subsystem/package structure
|
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<p>
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<li>
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shall support a directory structure of at least two levels
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</td>
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<td>
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All defined at the project level. SCRAM makes no limitations.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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shall be able to handle O(1000) packages in a user friendly manner
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</td>
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<td>
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No limitations provided by SCRAM although the tools scram uses
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(e.g. compilers) may cause a problem.
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</td>
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</tr>
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<tr>
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<td>
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<li>
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Maintenance of the "central installation" should be automated as much
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as possible
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</td>
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<td>
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Download is a matter of clicking on a link in a web page with SCRAM.<br>
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It then can then be installed with a single command. Removal is not fully
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supported as yet (the SCRAM database needs updating automatically)
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, although 'rm' wont hurt!
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</td>
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</tr>
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<tr>
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<td>
|
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<li>
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must produce executables with built in version (tag) information
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</td>
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<td>
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Not yet
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</td>
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</tr>
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<tr>
|
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<td>
|
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<li>
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shall support Objectivity, and provide easy mechanisms to
|
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accommodate developments of this technology
|
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</td>
|
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<td>
|
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An Objectivity tool description file does exist for linking with libraries etc.
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Although full Objectivity functionality is not yet provided, this file
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is the place to develop it.
|
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</td>
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</tr>
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<tr>
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<td>
|
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<li>
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shall place libraries in a common directory
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</td>
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<td>
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Yes
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</td>
|
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</tr>
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<tr>
|
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<td>
|
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<li>
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shall provide the means to use a mix of programming languages
|
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</td>
|
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<td>
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A combination of file extensions and tool files should do the trick.
|
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Currently only fortran and C++ supported though
|
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</td>
|
| 356 |
</tr>
|
| 357 |
<tr>
|
| 358 |
<td>
|
| 359 |
<li>
|
| 360 |
shall provide switches to use QA tools such as static code
|
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analysers, and run-time debuggers
|
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</td>
|
| 363 |
<td>
|
| 364 |
Ultimately these will be automatically generated (and documented)
|
| 365 |
in accordance to the tool description file for that product. At the moment they
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have to be hard coded in.
|
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</td>
|
| 368 |
</tr>
|
| 369 |
<tr>
|
| 370 |
<td>
|
| 371 |
<li>
|
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More than one version of SCRAM must be able to reside on any given
|
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"site" at the same time.
|
| 374 |
</td>
|
| 375 |
<td>
|
| 376 |
Yes - currently controlled through the SCRAM_HOME variable.
|
| 377 |
<p>
|
| 378 |
Developments will allow a project to specify that it requires a specific scram version, which will be automatically acquired (if not already available)
|
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and set up for use.
|
| 380 |
</td>
|
| 381 |
</tr>
|
| 382 |
<tr>
|
| 383 |
<td>
|
| 384 |
<li>
|
| 385 |
An automatic installation procedure
|
| 386 |
</td>
|
| 387 |
<td>
|
| 388 |
Yes, although will be improved (See previous entry).
|
| 389 |
</td>
|
| 390 |
</tr>
|
| 391 |
<tr>
|
| 392 |
<td>
|
| 393 |
<li>
|
| 394 |
shall be configurable, such that different "tools" in the same
|
| 395 |
class can be easily interchanged. (e.g repository management software)
|
| 396 |
<p>
|
| 397 |
<li>
|
| 398 |
SCRAM shall have "project" specific selection of any "tools"
|
| 399 |
and "external software" (including version specification).
|
| 400 |
(e.g. Compilers, Package Management, libraries, repository,
|
| 401 |
SCRAM Version)
|
| 402 |
</td>
|
| 403 |
<td>
|
| 404 |
Yes with tool description files/ project files and no dependence on any
|
| 405 |
particular source code management system SCRAM is highly configurable.
|
| 406 |
</td>
|
| 407 |
</tr>
|
| 408 |
<tr>
|
| 409 |
<td>
|
| 410 |
<li>
|
| 411 |
provide an automatic installation procedure for any
|
| 412 |
SCRAM maintained project
|
| 413 |
</td>
|
| 414 |
<td>
|
| 415 |
Just click on a web page to install the project!
|
| 416 |
<p>
|
| 417 |
If you have things in non standard places you may be asked a few questions as to where things are.
|
| 418 |
</td>
|
| 419 |
</tr>
|
| 420 |
<tr>
|
| 421 |
<td>
|
| 422 |
<li>
|
| 423 |
All "project" specific information is to be maintained in the
|
| 424 |
"project" repository
|
| 425 |
</td>
|
| 426 |
<td>
|
| 427 |
Yes. (with the exception of groups which are currently hardcoded).
|
| 428 |
</td>
|
| 429 |
</tr>
|
| 430 |
<tr>
|
| 431 |
<td>
|
| 432 |
<li>
|
| 433 |
SCRAM shall be easily portable to new "platforms"
|
| 434 |
</td>
|
| 435 |
<td>
|
| 436 |
SCRAM is written in Perl5, and does not invoke system calls directly except for
|
| 437 |
gmake. As such it should be runnable anywhere that Perl5 and gmake
|
| 438 |
is available. By
|
| 439 |
removing the hard coded compiler descriptions and replacing them with
|
| 440 |
tool files will aid porting futher.
|
| 441 |
</td>
|
| 442 |
</tr>
|
| 443 |
<tr>
|
| 444 |
<td>
|
| 445 |
<li>
|
| 446 |
shall not rely on "platform"/"tool" dependent features
|
| 447 |
</td>
|
| 448 |
<td>
|
| 449 |
SCRAM BuildFiles simply require you to describe what, not how to make
|
| 450 |
something. Thus the logical build is seperated from the physical implementation
|
| 451 |
details. Its then a question of providing the right tool to perform the function
|
| 452 |
requested in the BuildFile.
|
| 453 |
</td>
|
| 454 |
</tr>
|
| 455 |
<tr>
|
| 456 |
<td>
|
| 457 |
<li>
|
| 458 |
Locations of external software must be specified solely at the site of
|
| 459 |
installation.
|
| 460 |
<p>
|
| 461 |
<li>
|
| 462 |
Specification of "external software" locations shall be automated as
|
| 463 |
much as possible. The user must be informed clearly of any missing
|
| 464 |
product information.
|
| 465 |
</td>
|
| 466 |
<td>
|
| 467 |
Setup of tools will match the current system to the toolfile requirements.
|
| 468 |
Where automation fails the user will be asked where a product is installed
|
| 469 |
</td>
|
| 470 |
</tr>
|
| 471 |
<tr>
|
| 472 |
<td>
|
| 473 |
<li>
|
| 474 |
SCRAM must provide a mechanism to specify "external software"
|
| 475 |
requirements and default configurations.
|
| 476 |
<p>
|
| 477 |
<li>
|
| 478 |
A project must explicity specify all external requirements for any
|
| 479 |
given "platform", for any given "release"
|
| 480 |
</td>
|
| 481 |
<td>
|
| 482 |
Yes through the requirements document
|
| 483 |
</td>
|
| 484 |
</tr>
|
| 485 |
<tr>
|
| 486 |
<td>
|
| 487 |
<li>
|
| 488 |
must be able to support multiple "projects" on the same machine
|
| 489 |
</td>
|
| 490 |
<td>
|
| 491 |
Yes - individual projects are self contained.
|
| 492 |
</td>
|
| 493 |
</tr>
|
| 494 |
<tr>
|
| 495 |
<td>
|
| 496 |
User must be able to see the project resources made available
|
| 497 |
through SCRAM
|
| 498 |
</td>
|
| 499 |
<td>
|
| 500 |
Once a project is installed it is entered into a SCRAM database. The
|
| 501 |
<em>scram list</em> command will show all the available projects installed
|
| 502 |
which are available to the user. SCRAM also allows database linking so that
|
| 503 |
scram project installations on remote sites can
|
| 504 |
also be made available over a shared file system.
|
| 505 |
</td>
|
| 506 |
</tr>
|
| 507 |
</table>
|
| 508 |
|
| 509 |
<! Style Sheet Footer ---------------Do not change anything after this line-->
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<hr>
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<table border=1 width=100%>
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<td align=left>
|
| 513 |
<a href=mailto:Christopher.Williams@cern.ch
|
| 514 |
>Chris Williams</a>
|
| 515 |
</td>
|
| 516 |
<td align=center>
|
| 517 |
Last Updated Tue Aug 22 16:37:41 2000
|
| 518 |
</td>
|
| 519 |
<td align=right><a href=/cgi-cmc/pagestat>Show Stats</a>
|
| 520 |
</td>
|
| 521 |
</table>
|
| 522 |
</body> </html>
|
| 523 |
<! End Style Sheet Footer>
|
