# Generates toolchains/env.sh (for shells and scripts) and
# toolchains/config.mk (for make) from the compEnv output of every installed
# component, so both see exactly the same tool paths. Sourced after
# lib/common.sh.


# writeConfig -- regenerate both files from the installed components.
writeConfig() {
    local id
    local kind
    local name
    local value
    local vars=()
    local paths=()
    local envTmp
    local mkTmp

    case "$JOEY_REPO" in
        *" "*) die "the repository path contains a space ($JOEY_REPO); make cannot build from there" ;;
    esac

    for id in $(componentIds); do
        [ -n "$(stampRead "$id")" ] || continue
        while IFS=$'\t' read -r kind name value; do
            case "$kind" in
                var)  vars+=("$name=$value") ;;
                path) paths+=("$name") ;;
            esac
        done < <(compRun "$id" compEnv)
    done

    mkdir -p "$JOEY_TOOLCHAINS"
    envTmp="$(mktemp "$JOEY_TOOLCHAINS/env.sh.XXXXXX")"
    mkTmp="$(mktemp "$JOEY_TOOLCHAINS/config.mk.XXXXXX")"
    {
        printf '# Generated by install.sh -- do not edit. For a shell:\n'
        printf '#   source toolchains/env.sh\n'
        printf "export JOEY_TOOLCHAINS='%s'\n" "$JOEY_TOOLCHAINS"
        for value in "${vars[@]}"; do
            printf "export %s='%s'\n" "${value%%=*}" "${value#*=}"
        done
        # Prepend each directory once, even when this file is sourced again.
        for value in "${paths[@]}"; do
            printf 'case ":$PATH:" in *":%s:"*) ;; *) PATH='"'"'%s'"'"':"$PATH" ;; esac\n' "$value" "$value"
        done
        printf 'export PATH\n'
    } > "$envTmp"
    {
        printf '# Generated by install.sh -- do not edit. make reads it by itself.\n'
        printf 'export JOEY_TOOLCHAINS := %s\n' "$JOEY_TOOLCHAINS"
        for value in "${vars[@]}"; do
            printf 'export %s := %s\n' "${value%%=*}" "${value#*=}"
        done
        if [ ${#paths[@]} -gt 0 ]; then
            printf 'export PATH := %s:$(PATH)\n' "$(IFS=:; printf '%s' "${paths[*]}")"
        fi
    } > "$mkTmp"
    chmod 644 "$envTmp" "$mkTmp"
    mv "$envTmp" "$JOEY_TOOLCHAINS/env.sh"
    mv "$mkTmp" "$JOEY_TOOLCHAINS/config.mk"
}