rpkg.macros

#!/bin/bash

function cached {
    declare v=${OUTPUT[$1]}
    [[ -n $v ]] && echo -n "$v"
}

function zig_min_version {
    cached zig_min_version && return

    output "$(grep -oP 'buildpkg\.requireZig\("\K[^"]+' build.zig)"
}

function zig_max_version {
    cached zig_max_version && return

    declare major minor patch
    read -r major minor patch <<<"$(zig_min_version | tr '.' ' ')"

    output "${major}.$((minor + 1)).${patch}~"
}

function git_custom_describe {
    cached git_custom_describe && return

    declare describe devtag tag commits affix hash
    describe=$(git describe --always --long --first-parent --abbrev=7 --exclude=tip origin/main)
    read -r tag commits hash <<<"${describe//-/ }"

    devtag="$(grep -oP '\.version\s*=\s*"\K[^\"]+' build.zig.zon)"
    tag="${tag:1}"
    if [[ "${tag}" == "${devtag}" ]]; then
        affix='stable'
    else
        tag="${devtag}"
        affix='dev'
    fi
    [[ ${#hash} -eq 8 ]] && hash="${hash:1}"

    output "${tag} ${commits} ${affix} ${hash}"
}

function git_custom_package_version {
    cached git_custom_package_version && return

    declare tag commits affix hash
    read -r tag commits affix hash <<<"$(git_custom_describe)"

    output "${tag}~${affix}.${commits}+${hash}"
}

function git_custom_internal_version {
    cached git_custom_internal_version && return

    declare tag commits affix hash
    read -r tag commits affix hash <<<"$(git_custom_describe)"

    output "${tag}-${affix}+${hash}"
}

function git_custom_release {
    cached git_custom_release && return

    # find last merge
    declare last_merge rest
    read -r last_merge rest <<<"$(git log --merges --oneline -n1)"
    [[ -n $last_merge ]] || abort "failed to find last merge"

    # count commits since last merge; might be zero
    declare release
    release=$(git log --oneline HEAD "^$last_merge" | wc -l)

    output "$((release + 1))"
}

function git_custom_date {
    cached git_custom_date && return
    output "$(date +'%a %b %d %Y')"
}