# Maintainer: dreieck
# Contributor: Gabriel Margiani (gamag) <gabriel _strange_curved_character_ margiani · ch>
# Contributor: matthiaskrgr <matthias · krueger _strange_curved_character_ famsike · de>

_pkgname=widelands
pkgname="${_pkgname}-git"
epoch=0
_pkgver=latest
pkgver=20+r24473_20200312_510e0dd
pkgrel=1
pkgdesc="An elaborate realtime multiplayer strategy game with emphasis on economy and transport - development version. In the spirit of BlueByte's 'Siedler II/ Settlers 2'."
url="http://widelands.org/"
arch=('i686' 'x86_64')
license=('GPL2')
depends=(
  'boost-libs'
  'gettext'
  'glew'
  'hicolor-icon-theme'
  'libpng'
  'sdl2_image'
  'sdl2_mixer'
  'sdl2_ttf'
  'zlib'
)
makedepends=(
  'boost'
  'cmake'     # For configuring the build
  'doxygen'   # For documentation (?)
  'git'       # For getting the source
  'graphviz'  # For documentation (?)
  'python'
)
optdepends=()
provides=(
  "${_pkgname}=${pkgver}"
)
conflicts=(
  "${_pkgname}"
  "${_pkgname}-bzr"
  "${_pkgname}-data"
)
replaces=(
  "${_pkgname}-bzr<=${pkgver}" # Previously, the development code was hosted a another location in a bazaar repository.
)
source=(
  "${_pkgname}::git+git://github.com/${_pkgname}/${_pkgname}.git"
)
sha256sums=(
  'SKIP'
)
options=('!strip') # Stripping seems not to reduce the size, but takes a long time.


# The following variable controls if `ccache` should be used for the build -- it switches some variables, also in build().
_ccache=false # true|false

# Check `$USE_CCACHE` environment variable if we should use `ccache`
case "${USE_CCACHE}" in
  [yY]|[yY][eE][sS]|[tR][rR][uU][eE]|[oO][nN])
    _ccache=true
  ;;
esac

if "${_ccache}"; then
  makedepends+=('ccache')
  options+=('ccache')
fi

# Temporary file in "${srcdir}" the git log should be written to -- it will become part of the installed documentation.
_gitlog="_widelands.git.log"

### The following is deactivated, since the corresponding section in package() is commented out.
# # Keep the following translations, remove all other.
# _keep_translations=('en_US' 'en_GB' 'de')


pkgver() {
  cd "${srcdir}/${_pkgname}"

  _get_build_ver() {
    grep -Ei 'build[[:space:]]+[0-9]+' "ChangeLog" | head -n 1 | sed -E 's|^.*[Bb]uild[[:space:]]+([0-9]+).*$|\1|'
  }
  _get_git_commit_count() {
    git rev-list --count HEAD
  }
  _get_git_latest_commit_date() {
    git log -n 1 --format=tformat:%ci | awk '{print $1}' | tr -d '-'
  }
  _get_git_hash() {
    git rev-parse --short=7 HEAD
  }

  _ver="$(_get_build_ver)"
  _rev="$(_get_git_commit_count)"
  _date="$(_get_git_latest_commit_date)"
  _hash="$(_get_git_hash)"

  if [ -z ${_ver} ]; then
    error "Failed to determine build version. Aborting."
    return 11
  fi
  if [ -z ${_rev} ]; then
    error "Failed to determine commit count. Aborting."
    return 12
  fi
  if [ -z ${_date} ]; then
    error "Failed to determine latest commit date. Aborting."
    return 13
  fi
  if [ -z ${_hash} ]; then
    error "Failed to determine git hash. Aborting."
    return 14
  fi

  printf "%s" "${_ver}+r${_rev}_${_date}_${_hash}"
}


prepare() {
  cd "${srcdir}/${_pkgname}"

  msg2 "Creating git log: Executing 'git log' ..."
  git log > "${srcdir}/${_gitlog}"

  msg2 "Creating directories 'build' and 'build/locale' ..."
  test -d build/locale || mkdir -p build/locale
  msg2 "Symlinking 'build/locale/' to the main source base directory ..."
  test -e locale || ln -s build/locale .
}


build() {
  cd "${srcdir}/${_pkgname}/build"

  # If we want to compile with ccache, modify $CC/ $CXX accordingly:
  if "${_ccache}"; then
    msg2 'Build with `ccache` requested. Setting `$CC` and `$CXX` environment variables accordingly ...'
    # If $CC/ $CXX is empty, set a default compiler:
    if [ -z $CC ]; then
      CC=gcc
    fi
    if [ -z $CXX ]; then
      CXX=g++
    fi
    # Only append 'ccache' if it is not already part of $CC/ $CXX:
    if ! grep -wq ccache <(printf '%s' "${CC}"); then
      CC="ccache ${CC}"
    fi
    if ! grep -wq ccache <(printf '%s' "${CXX}"); then
      CXX="ccache ${CXX}"
    fi
    export CC
    export CXX
  fi

  msg2 'Running `cmake` ...'
  # YES, -DCMAKE_INSTALL_PREFIX="/usr/bin" is corrent (nothing ${pkgdir}-related!!).
  # If this failes on an existing build because of an mismatch of src and build cmake files, just delete build and try again.
  cmake \
    -DBUILD_TESTING=ON \
    -DCMAKE_BUILD_TYPE=Release \
    -DCMAKE_CXX_FLAGS="" \
    -DCMAKE_CXX_FLAGS_RELEASE="${CXXFLAGS} -DNDEBUG" \
    -DCMAKE_C_FLAGS="" \
    -DCMAKE_C_FLAGS_RELEASE="${CFLAGS} -DNDEBUG" \
    -DCMAKE_EXE_LINKER_FLAGS="" \
    -DCMAKE_EXE_LINKER_FLAGS_RELEASE="${LDFLAGS}" \
    -DCMAKE_INSTALL_PREFIX="/usr/bin" \
    -DCMAKE_MODULE_LINKER_FLAGS="${LDFLAGS}" \
    -DCMAKE_SHARED_LINKER_FLAGS="${LDFLAGS}" \
    -DCMAKE_STATIC_LINKER_FLAGS="" \
    -DGETTEXT_MSGFMT_EXECUTABLE=/usr/bin/msgfmt \
    -DGETTEXT_MSGMERGE_EXECUTABLE=/usr/bib/msgmerge \
    -DICU_CONFIG_EXECUTABLE=/usr/bin/icu-config \
    -DOPTION_ASAN=OFF \
    -DOPTION_BUILD_CODECHECK=OFF \
    -DOPTION_BUILD_TESTS=ON \
    -DOPTION_BUILD_TRANSLATIONS=ON \
    -DOPTION_BUILD_WEBSITE_TOOLS=ON \
    -DOPTION_GLEW_STATIC=OFF \
    -DOPTION_USE_GLBINDING=OFF \
    -DOpenGL_GL_PREFERENCE=LEGACY \
    -DUSE_XDG=OFF \
    -DWL_INSTALL_DATADIR=/usr/share/widelands \
    ..

  msg2 'Running `make` ...'
  make
  # msg2 'Running `make lang` ...'
  # make lang ## Seems not to be needed; seems to be done already with the general `make`-call.
}


check() {
  cd "${srcdir}/${_pkgname}/build"
  msg2 'Running `make test` ...'
  make test
}


package() {
  cd  "${srcdir}/${_pkgname}/build"

  msg2 'Running `make install` ...'
  make DESTDIR="${pkgdir}" install

  msg2 'Installing additional documentation files ...'
  cd "${srcdir}/${_pkgname}"
  for _docfile in CREDITS ChangeLog; do
    install -D -v -m644 "${_docfile}" "${pkgdir}/usr/share/doc/${_pkgname}/${_docfile}"
  done
  install -D -v -m644 "${srcdir}/${_gitlog}" "${pkgdir}/usr/share/doc/${_pkgname}/git-log.txt"

### When re-activating the following, also uncomment the line which sets ${_keep_translations[]}!
#   msg2 'Removing translations we do not want ...'
#   ls -1d "${pkgdir}/usr/share/widelands/locale"/* | grep -vE $(printf ' -e /%s$' "${_keep_translations[@]}") | while read _line; do
#     rm -R "${_line}"
#   done
}