#!/bin/bash
# -*- coding: utf-8; mode: sh; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=sh:et:sw=4:ts=4:sts=4

# Note:
# This script is sourced by the mpbb wrapper script.
# Do not execute this directly!

install-dependencies-usage() {
    # "prog" is defined in mpbb-help.
    # shellcheck disable=SC2154
    cat <<EOF
usage: $prog [<global opts>] install-dependencies <port>[@(+|-)variant [...]]

Build and install the dependencies of the given port.

Run \`$prog help' for global options and a list of other subcommands.
EOF
}

install-dependencies() {
    if [[ -z $1 ]]; then
        err "Must specify a port"
        return 1
    fi
    local port=${1%%@*}
    local portvariants=${1:${#port}+1}
    local dependencies
    local dependencies_count
    local dependencies_counter
    local depname
    local depvariants
    local failcachecounter
    # $option_log_dir is set in mpbb
    # shellcheck disable=SC2154
    local log_status_dependencies="${option_log_dir}/dependencies-progress.txt"
    local log_subports_progress="${option_log_dir}/ports-progress.txt"

    # prepare the log file and make sure to start with an empty one
    mkdir -p "${option_log_dir}"
    :> "$log_status_dependencies"

    # calculate list of dependencies in-order
    # $option_prefix and $thisdir are set in mpbb
    # shellcheck disable=SC2154
    dependencies=$("${option_prefix}/bin/port-tclsh" "${thisdir}/tools/dependencies.tcl" "$port" "$portvariants")
    # shellcheck disable=SC2181
    if [ $? -ne 0 ]; then
        echo "Calculating dependencies for '$port' failed, aborting." >&2
        echo "Building '$port' ... [ERROR] (failed to calculate dependencies) maintainers: $(get-maintainers "$port")." >> "$log_subports_progress"
        return 1
    fi

    if [ -z "$dependencies" ]; then
        echo "'$port' has no dependencies, continuing." >&2
        return 0
    fi

    dependencies_count=$(echo "$dependencies" | wc -l | sed 's/ *//g')
    dependencies_counter=1

    echo "Installing $dependencies_count dependencies of $port:" | tee -a "$log_status_dependencies"
    echo "$dependencies" | sed -E 's/^/ - /' | tee -a "$log_status_dependencies"
    echo >> "$log_status_dependencies"

    # save $@ since 'set' is used below
    orig_args="$*"

    # Check whether any of the dependencies have previously failed
    failcachecounter=0
    while read -r dependency; do
        # Split portname +variant1+variant2 into portname and variants, where
        # the variants are optional.
        depname=${dependency%% *}
        depvariants=${dependency:${#depname}+1}

        # $depvariants isn't quoted on purpose
        # shellcheck disable=SC2086
        if ! failcache_test "$depname" $depvariants; then
            text="Dependency '${depname}' with variants '${depvariants}' has previously failed and is required."
            echo "$text" >&2
            echo "$text" >> "$log_status_dependencies"
            echo "Building '$port' ... [ERROR] (failed to install dependency '${depname}') maintainers: $(get-maintainers "$port" "${depname}")." >> "$log_subports_progress"
            failcachecounter=$((failcachecounter + 1))
        fi
    done <<<"$dependencies"

    if [ $failcachecounter -gt 0 ]; then
        echo "Aborting build because $failcachecounter dependencies are known to fail." >&2
        return 1
    fi

    # option_work_dir is set in mpbb
    # shellcheck disable=SC2154
    rm -f "${option_work_dir}/all_ports"

    while read -r dependency; do
        # Split portname +variant1+variant2 into portname and variants, where
        # the variants are optional.
        depname=${dependency%% *}
        depvariants=${dependency:${#depname}+1}

        text="Installing dependency ($dependencies_counter of $dependencies_count) '${depname}' with variants '${depvariants}'"
        echo "----> ${text}"
        echo -n "${text} ... " >> "$log_status_dependencies"
        # $option_prefix and $thisdir are set in mpbb
        # shellcheck disable=SC2154
        if [[ -f $("${option_prefix}/bin/port-tclsh" "${thisdir}/tools/archive-path.tcl" "${depname}" "${depvariants}") ]]; then
            echo "Already installed, nothing to do"
            echo "[OK]" >> "$log_status_dependencies"
            dependencies_counter=$((dependencies_counter + 1))
        else
            # $depvariants isn't quoted on purpose
            # shellcheck disable=SC2154,SC2086
            if ! "${option_prefix}/bin/port" -dn install --unrequested "$depname" $depvariants; then
                echo "Build of dependency '${depname}' with variants '${depvariants}' failed, aborting." >&2
                echo "[FAIL]" >> "$log_status_dependencies"
                echo "Building '$port' ... [ERROR] (failed to install dependency '${depname}') maintainers: $(get-maintainers "$port" "${depname}")." >> "$log_subports_progress"

                # Update failcache
                # $depvariants isn't quoted on purpose
                # shellcheck disable=SC2086
                if ! failcache_failure "$depname" $depvariants; then
                    err "failcache_failure $depname $depvariants failed."
                    return 1
                fi
                return 1
            else
                echo "[OK]" >> "$log_status_dependencies"

                # Remove failcache if it exists
                # $depvariants isn't quoted on purpose
                # shellcheck disable=SC2086
                if ! failcache_success "$depname" $depvariants; then
                    err "failcache_success $depname $depvariants failed."
                    return 1
                fi
                dependencies_counter=$((dependencies_counter + 1))
                # deactivate everything between builds
                # $option_prefix is set by mpbb
                # shellcheck disable=SC2154
                "${option_prefix}/bin/port" -fp deactivate active
            fi
        fi
        # add to the list for gather_archives
        echo "$dependency" >> "${option_work_dir}/all_ports"
    done <<<"$dependencies"

    # activate everything now that we know it's all built and installed
    # ... but only we're actually going to build the requested port

    # $option_prefix and $thisdir are set in mpbb, orig_args is not quoted on purpose
    # shellcheck disable=SC2154,SC2086
    if [[ -f $("${option_prefix}/bin/port-tclsh" "${thisdir}/tools/archive-path.tcl" ${orig_args}) ]]; then
        echo "${orig_args} Already installed, not activating dependencies"
    else
        echo "Activating all dependencies..."
        # $option_prefix is set by mpbb, and dependencies isn't quoted on purpose
        # shellcheck disable=SC2154,SC2086
        if ! "${option_prefix}/bin/port" -dn install --unrequested ${dependencies}; then
            echo "Activating all dependencies failed, aborting." >&2
            return 1
        fi
        echo "Done."
    fi
}