Add a --except flag to show, fetch and track

This flag is intended to be used to exclude certain dependencies, such as stage2 dependencies.

added 39 commits

• e72fb745 - 1 commit from branch BuildStream:master
• 40e8f477 - sandbox.py: Added 'artifact' keyword argument to mark_directory() API
• 4e131808 - _sandboxbwrap.py: Adapt to new sandbox 'artifact' marked directories.
• 9db8af29 - scriptelement.py: Allow layout members with no Element specified.
• e4d6a354 - x86image.py: Added a None layout element at /buildstream
• 36e16788 - script.py: Allow layout members without an element.
• 27a06a2e - sandbox.py: Dont ensure directories at mark_directory() time
• 8eaa0f77 - _sandboxbwrap.py: Ensure mountpoints exist before mounting
• 15af64dc - element.py: Added _prepare_sandbox() context manager
• b2b079f6 - _pipeline.py: Changed checkout API to stage runtime dependencies
• 3cdff0f2 - main.py: Added some additional --deps options for bst show
• 696c7bb8 - WIP Add --except
• 60d964cd - Fix resurrected dependencies not resurrecting their dependencies
• dc95576b - setup.py: Added comment about OSTree.YEAR_VERSION & OSTree.RELEASE_VERSION
• 86ae4676 - _pipeline.py: Assert consistent pipelines in fetch() and build()
• 991c18ae - main.py: Added new --track option for bst fetch
• bfdaf306 - import.py: Raise an error when no files are found
• d8f6d980 - import.py: Raise an error for elements that have no sources
• 067f0245 - scriptelement.py: Fixing some fallout in scriptelement
• e5f9cb6b - tar.py: Consider the 'base-dir' as part of the unique key
• d4827411 - _yaml.py: Strengthen node_get() to handle TypeError in type conversions.
• f39a3c38 - _loader.py: Fixed Source parsing to report errors better
• 792b62b4 - Fix styling issues
• 7ef629fb - Let remove_elements remove elements from the list
• 247921da - Add --except arguments to fetch and track
• 64153e49 - Refactor deps_elements to be part of _pipeline
• 253da5ab - Fix styling issue
• d510e5b0 - sandbox.py: Added 'artifact' keyword argument to mark_directory() API
• fbcdb7e0 - _sandboxbwrap.py: Adapt to new sandbox 'artifact' marked directories.
• 2c94b5c3 - _sandboxbwrap.py: Ensure mountpoints exist before mounting
• dec497ce - _pipeline.py: Changed checkout API to stage runtime dependencies
• 64a97c8c - import.py: Raise an error when no files are found
• 8f311b86 - import.py: Raise an error for elements that have no sources
• cd8dc384 - Allow --except to be specified multiple times
• c709347e - Fix elements not being removed for certain modes
• 8f78de2b - Fix styling issue
• 080dec5c - Merge branch 'except'
• 15cd25c0 - Merge branch 'except' of gitlab.com:tlater/buildstream into except
• da07869e - _pipeline.py: Fix dependency list reuse

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marked as a Work In Progress from tlater/buildstream@696c7bb8118c7bc24df6a276a672d10d71d511fa

resolved all discussions

unmarked as a Work In Progress

closed