links to this page:    DepS: Dependencies for Squeak Swiki Page List

ToDo

• DepS dependencies page
• Transformation page

General

• Separating Dependencies from Transformations

Dependencies

• pre- and post-requirements
  • pre-req: necessary to allow Action in Transformation,
  • post-req: necessary to make provides valid after Transformation,
  • -> realizable via two stages of deps rules:
    • install action stage, and
    • logical rules stage just providing run Caps;
  • provides may be used as pre-reqs for other Transformations or as targets just to be valid at the end of the whole installation process
  • requirements of targets (to be runned packages) could be install targets,
  • normal case: post- and pre-reqs not sharing some elements, if realized via two stages of transformations,
• standard Boolean ops AND and OR:
  • requires standard -> logical AND
  • conflicts standard -> logical OR
  • -> others realizable via logical deps rules
    • nested, too

Transformations

• consisting of Dependency (multiple?) and Action (multiple?)
• standard install and delete Transformations, installing/deleting standard Caps
• logical Transformations

Algorithms

• outer loop: for all targets and requires of targets, as long as they are not reqs somewhere in the process!
• inner loop: depth first searching of Transformations resulting in requires of outer loop.