File golang-src-macros.sh of Package golang-packaging

#!/bin/bash

set -xeo pipefail

export PREFIX="/usr/share/gocode/src"


get_go_source_files() {
    go list -json ./...|jq -r '.ImportPath as $prefix | .GoFiles[] | "\($prefix)/\(.)"'
}

get_go_module_path() {
    res=$(go list -f '{{.Module.Path}}' ./...|sort|uniq)
    if [[ $(echo $res | wc -l) -gt 1 ]]; then
        echo "got multiple module paths!"
        exit 1
    fi
    echo $res
}

generate_filelist() {
    rm -f go_files.lst go_files.tmp

    # go files
    for file in $(get_go_source_files); do
        echo "$PREFIX/$file" >> go_files.tmp
    done

    # go.mod & go.sum
    printf "$PREFIX/%s/go.mod\n$PREFIX/%s/go.sum\n" "$(get_go_module_path)" "$(get_go_module_path)" >> go_files.tmp

    # PREFIX & leading directory
    { echo "%dir $PREFIX"; echo "%dir $(dirname $PREFIX)"; } >> go_files.tmp

    # directories inside the source tree
    for mod_name in $(go list -f '{{.ImportPath }}' ./...); do
        echo "%dir $PREFIX/$mod_name" >> go_files.tmp

        current="$PREFIX"

        # now all directories leading to this file
        for dir in $(echo "$mod_name" | tr '/' '\n'); do
            current="$current/$dir"
            echo "%dir $current" >> go_files.tmp
        done
    done

    # remove all duplicates
    sort < go_files.tmp | uniq > go_files.lst
    rm go_files.tmp
}

go_install() {
    mkdir -p "$RPM_BUILD_ROOT/$PREFIX"

    srcs=()
    dests=()

    while IFS= read -r line; do
        srcs+=("$line")
    done < <(go list -json ./... | jq -r '.Dir as $dir | .GoFiles[] | "\($dir)/\(.)"')

    while IFS= read -r line; do
        dests+=("$line")
    done < <(go list -json ./... | jq -r '.ImportPath as $imp_path | .GoFiles[] | "\($imp_path)/\(.)"')

    len=${#srcs[@]}
    for (( i=0; i<$len; i++ )); do
        install -Dpm 0644 "${srcs[$i]}" "$RPM_BUILD_ROOT/$PREFIX/${dests[$i]}"
    done

    install -Dpm 0644 go.mod "$RPM_BUILD_ROOT/$PREFIX/$(get_go_module_path)/go.mod"
    install -Dpm 0644 go.sum "$RPM_BUILD_ROOT/$PREFIX/$(get_go_module_path)/go.sum"
}

main() {

    local action="${1}"

    case "${action}" in
        "--install"|"install")
            go_install
            ;;
        "--prep"|"prep")
            process_prepare "${@:2}"
            ;;
        "--build"|"build")
            process_build "${@:2}"
            ;;
        "--source"|"source")
            process_source "${@:2}"
            ;;
        "--test"|"test")
            process_test "${@:2}"
            ;;
        "--filelist"|"filelist")
            generate_filelist
            ;;
        *)
            echo "Please specify a valid method: install, filelist" >&2
            ;;
    esac
}

main "$@"