NOTES.md

Setup script improvements notes & TODO

bitbake-layers additions based on mel scripts

• The find layers commands will default to looking at: *, */*, ${COREBASE}/../*, ${COREBASE}/../*/*
• Rework command handling to pull commands from plugins, the way recipetool and devtool do, ideally sharing code for it
• Add sort-layers command, to sort BBLAYERS by BBFILE_PRIORITY
• Add find-layer-by-name command
• Add find-layer-with-path command
• Add find-layer-depends command
• Determine whether to merge any of the find-layer commands. I.e. by-name could handle depends, but then what about getting depends for layer paths rather than names? Initially keep them separate and benchmark and test usage.
• Consider adding a command which wraps those components
• Let add-layer accept mutiple layers, or create add-layers (or the former, then alias to the latter)
• Let remove-layer accept multiple layers, not just a wildcard
• Consider adding LAYERDEPENDS sanity checking to add-layer and remove-layer
• In find-layer-by-name and find-layer-depends, don't bother looking for layers we already have enabled. This will also mean that having a layer explicitly listed in BBLAYERS will avoid issues with duplicate layers existing. I.e. if you have poky and oe-core both cloned, that's not a problem if one of them is already in BBLAYERS, as that one will win.
• Sort out singular vs plural in the command naming

Example of usage:

find_layers () {
    for layer; do
        if [ -d "$layer" ]; then
            echo "$layer"
        fi
    done

    for layer; do
        if [ ! -d "$layer" ]; then
            echo "$layer"
        fi
    done | nlxargs bitbake-layers find-layer-by-name
}

add_with_deps () {
    tr '\n' '\0' | xargs -0 bitbake-layers find-layer-depends -k || return 2 | \
        sort -u | tr '\n' '\0' | xargs -0 bitbake-layers add-layer && \
        bitbake-layers sort-layers || return 3
}

{
    bitbake-layers find-layer-by-name mentor-staging
    bitbake-layers find-layer-with-path conf/distro/mel.conf conf/machine/intel-corei7-64.conf
} | add_with_deps