## Reference: https://github.com/terrapkg/packages/blob/f794351643eed3dbf89441c1c335f7e6734d40ba/anda/langs/d/btdu/btdu.spec
## Difference 1) Not using pkgconfig(ncurses) 2) Offline dependencies 3) code.dlang.org SOURCE
%global _version    0.6.0
## find-debuginfo: gdb-add-index -> ../../gdb/utils.c:671: internal-error: virtual memory exhausted.
%global debug_package %nil
%global _buildtype  release

Name:           btdu
Version:        %{gsub %{_version} - ~}
Release:        %autorelease
Summary:        sampling disk usage profiler for btrfs

License:        GPL-2.0-only
URL:            https://github.com/CyberShadow/btdu

ExclusiveArch:  %{ldc_arches}

# Reference:    https://github.com/dlang/dub/blob/0030b9af02481fb518419bb4e13dd18731a9fd4f/source/dub/packagesuppliers/registry.d#L65
# or https://codemirror.dlang.org
%define __dub_url https://code.dlang.org/packages/
%define dub_source() %{lua:
    local package = rpm.expand('%1')
    local version = rpm.expand('%2')
    local url = rpm.expand('%__dub_url')
    -- first argument missing
    if package == '%1' then
        package = rpm.expand('%name')
    end
    if version == '%2' then
        version = rpm.expand('%version')
    end
    -- replace '~' with '-' for backwards compatibility
    version = version:gsub('~', '-')
    print(url .. package .. '/' .. version .. '.zip#/' .. package .. '-' .. version .. '.zip')
}

Source0:        %{dub_source %name %version}

## todo save packages to like /usr/share/dub/packages/xxxx.zip like rust
## use generate_requres -> read dub.selections.json and --> create something like dub(xxxx)

# dub build --registry=file://<> --skip-registery=.....

## from dub.selections.json
Source:         %{dub_source ae 0.0.3461}
Source:         %{dub_source btrfs 0.0.21}
Source:         %{dub_source ncurses 1.0.0}
Source:         %{dub_source emsi_containers 0.9.0}

BuildRequires:  dub
BuildRequires:  ldc
# https://github.com/CyberShadow/btdu/blob/master/README.md#building
BuildRequires:  ncurses-devel

%global _description %{expand:
%{summary}
}

%description %_description

%prep
## RPM lua's global value `sources` `source_nums` `patches` `patch_nums`
## Reference: https://rpm-software-management.github.io/rpm/man/rpm-lua.7#SPEC_FILES
## use FileSystemProvider 
## Reference: https://github.com/dlang/dub/pull/1616
## https://github.com/dlang/dub/blob/0030b9af02481fb518419bb4e13dd18731a9fd4f/source/dub/dub.d#L111
## https://github.com/dlang/dub/blob/0030b9af02481fb518419bb4e13dd18731a9fd4f/source/dub/packagesuppliers/filesystem.d
## This package supplier searches a certain directory for files with names of the form "[package name]-[version].zip".
## Dont try to mimic ~/.dub/packages , since dub fetch will modify package dub.json/dub.sdl here by adding version field and converting dub.sdl to dub.json
## TODO: Make this a helper for all D lang libraries
%{lua:
print(rpm.expand('mkdir %{_buildrootdir}/packages \n'))

for i, p in ipairs(source_nums) do
    if p ~= 0 then
        print(rpm.expand('cp ' .. sources[i] .. ' %{_buildrootdir}/packages\n'))
    end
end
}

# dcd's dubhash is located in common/ folder, so when building, DUB_PACKAGING_DIR will be dcd-version/common (since it is a dcb:common package) so , the dir.dirName is dcd-version. Situation is not the same as d-scanner, dfmt , their dubhash is located under root folder, so -C -n %{_version}/%{name}-%{_version} is a must. (-C strip root under archive file, -n create with nested folder)
## use <version>/<packgename>-<version> for all dubhash versioing d pacakge.
%setup -C -n %{_version}/%{name}-%{_version}

#TODO make this a %{dub_build} with --skip-registry=all --registry=file://%{_buildrootdir}/packages
%build
## -f force rebuild
## -n non-interactive
## --arch
## --cache local -> set to <current path>/.dub   user -> set to ~/.dub system /var/lib/dub/ see also $DUB_HOME
## --parallel
## TODO
## --deep (for target=static_libary to build all)
## --combined (will fail)
## --nodeps (will fail)
## --build-mode=separate (default), allAtOnce, singleFile
dub --skip-registry=all --registry=file://%{_buildrootdir}/packages --cache local build --parallel -f -n --compiler=ldc2 --build=%{_buildtype}


%install
install -Dpm0755 -t %{buildroot}%{_bindir} %{name}
## or
#install -m 0755 -vd %{buildroot}%{_bindir}
#install -m 0755 -vp %{name} %{buildroot}%{_bindir}
install -Dpm0644 -t %{buildroot}%{_mandir}/man1 %{name}.1


%check

%files
%license COPYING
%doc    README.md
%{_bindir}/%{name}
## man file will be compressed to .gz
%{_mandir}/man1/%{name}.1*

%changelog
%autochangelog