#!/bin/sh
# _K_iss _W_rapper that allows more powerful hooks.

# Why?
# - Because kiss doesn't make editing build files easy via default hooks.
#   And since I don't care for forking packages, this is _my_ solution.

# Effectively all kw does is fork a package, allow you to make some edits,
# then sets KISS_PATH so that the new package is first, then finally cleans up.

# Pretty simple.

# Also, `kw` is safe to alias to kiss, so there's no funny business.

# Example: (enabling rls for rust)
##!/bin/sh
#case "$1" in
#    rust) sed -E -i "s/(\"cargo\")/\"rls\", \1/" "$2/build";;
#esac

KW_REPO="${KW_REPO:-/tmp/kw}"
mkdir -p "$KW_REPO"
KW_HOOK=${KW_HOOK:-} # Maybe have a default hook?

ARGS=$@ # Save args for kiss.

cmd="$(echo "$ARGS" | cut -d' ' -f1)"

same_ver() {
    repo_dir_v="$(sed 's/ //g' < "$repo_dir/version")"
    d_dir_v="$(sed 's/ //g' < "$d/version")"
    [ "$repo_dir_v" = "$d_dir_v" ]
}

outdatedpkgs() {
    for d in "${KISS_ROOT:-/}"var/db/kiss/installed/*/ ; do (
        pkg="$(basename "$d")"
        repo_dir="$(KISS_HOOK='' kiss search "$pkg" | grep -v "installed" | sed 1q)"
        if [ -n "$repo_dir" ]; then
            if ! same_ver ; then
                echo "$pkg"
            fi
        fi
    ) & done
    wait
}

run_hooks_on_pkgs() {
    [ -n "$pkgs" ] && {
        for pkg in $pkgs; do
            cp -Lrf "$(kiss search "$pkg" | sed 1q)" "$KW_REPO"
            for hook in $(echo "$KW_HOOK" | tr ':' ' '); do
                "$hook" "$pkg" "$KW_REPO/$pkg"
            done
        done
    }
}

update_outdated() {
    pkgs=$(outdatedpkgs)
    [ -z "$pkgs" ] && exit 1 # Exit if no pkgs need updating.
    run_hooks_on_pkgs
    pkgs_no_newline="$(for p in $pkgs; do printf "%s " "$p" ; done | sed 's/ $//')"
    echo "Update '$pkgs_no_newline'? (Y/N): "
    read -r ANS
    if [ "$ANS" = Y ] ; then
        # shellcheck disable=2086
        KISS_PATH="$KW_REPO:$KISS_PATH" kiss build $pkgs_no_newline
    fi
}

case $cmd in
    b|build)
        pkgs="$(echo "$ARGS" | sed "s/$cmd//")"
        run_hooks_on_pkgs
        # shellcheck disable=2086
        KISS_PATH="$KW_REPO:$KISS_PATH" kiss $ARGS
        ;;
    U|upgrade) # TODO: Support upgrading packages with KW_HOOKs
        update_outdated
        ;;
    *)  # shellcheck disable=2086
        kiss $ARGS;; # If we don't know $cmd is, then send it to kiss.
esac
rm -rf "${KW_REPO:?Not set, so not removing root.}"/*/