configure

# Anticonf script by Jeroen Ooms (2024)
# The script will try 'Magick++-config' and 'pkg-config' to find required
# cflags and ldflags. Make sure this executable is in PATH when installing
# the package. Alternatively, you can set INCLUDE_DIR and LIB_DIR manually:
# R CMD INSTALL --configure-vars='INCLUDE_DIR=/.../include LIB_DIR=/.../lib'

# Library settings
PKG_CONFIG_NAME="Magick++"
PKG_DEB_NAME="libmagick++-dev"
PKG_RPM_NAME="ImageMagick-c++-devel"
PKG_BREW_NAME="imagemagick"
PKG_TEST_HEADER="<Magick++.h>"
PKG_LIBS="-lMagick++-6.Q16 -lMagickWand-6.Q16 -lMagickCore-6.Q16"

# Use Magick++-config
if [ `command -v pkg-config` ]; then
  PKGCONFIG_CFLAGS=`pkg-config --cflags --silence-errors ${PKG_CONFIG_NAME}`
  PKGCONFIG_LIBS=`pkg-config --libs ${PKG_CONFIG_NAME}`
elif [ `command -v Magick++-config` ]; then
  PKGCONFIG_CFLAGS=`Magick++-config --cflags`
  PKGCONFIG_LIBS=`Magick++-config --libs`
fi

# Pick up on GraphicsMagick but warn against it
if [ -z "$PKGCONFIG_LIBS" ] && [ `command -v GraphicsMagick++-config` ]; then
  echo "Warning: found GraphicsMagick++ instead of ImageMagick++. GraphicsMagick is not supported."
fi

# Note that cflags may be empty in case of success
if [ "$INCLUDE_DIR" ] || [ "$LIB_DIR" ]; then
  echo "Found INCLUDE_DIR and/or LIB_DIR!"
  PKG_CFLAGS="-I$INCLUDE_DIR $PKG_CFLAGS"
  PKG_LIBS="-L$LIB_DIR $PKG_LIBS"
elif [ "$PKGCONFIG_CFLAGS" ] || [ "$PKGCONFIG_LIBS" ]; then
  echo "Found pkg-config cflags and libs!"
  PKG_CFLAGS=${PKGCONFIG_CFLAGS}
  PKG_LIBS=${PKGCONFIG_LIBS}
elif [ `uname` = "Darwin" ]; then
  test ! "$CI" && brew --version 2>/dev/null
  if [ $? -eq 0 ]; then
    BREWDIR=`brew --prefix`
    INCLUDE_DIR="$BREWDIR/opt/imagemagick@6/include/ImageMagick-6"
    PKG_CFLAGS="-I$INCLUDE_DIR -DMAGICKCORE_QUANTUM_DEPTH=16 -DMAGICKCORE_HDRI_ENABLE=0"
    PKG_LIBS="-L$BREWDIR/opt/imagemagick@6/lib -lMagick++-6.Q16 -lMagickWand-6.Q16 -lMagickCore-6.Q16"
  else
    curl -sfL "https://autobrew.github.io/scripts/$PKG_BREW_NAME" > autobrew
    . ./autobrew
  fi
fi

# Find compiler
CXX=`${R_HOME}/bin/R CMD config CXX`
CXXFLAGS=`${R_HOME}/bin/R CMD config CXXFLAGS`
CPPFLAGS=`${R_HOME}/bin/R CMD config CPPFLAGS`

# For debugging
echo "Using PKG_CFLAGS=$PKG_CFLAGS"
echo "Using PKG_LIBS=$PKG_LIBS"

# Test configuration
echo "#include $PKG_TEST_HEADER" | ${CXX} -E ${CPPFLAGS} ${PKG_CFLAGS} ${CXXFLAGS} -xc++ - >/dev/null 2>configure.log

# Customize the error
if [ $? -ne 0 ]; then
  echo "--------------------------- [ANTICONF] --------------------------------"
  echo "Configuration failed to find the $PKG_CONFIG_NAME library. Try installing:"
  echo " - deb: $PKG_DEB_NAME (Debian, Ubuntu)"
  echo " - rpm: $PKG_RPM_NAME (Fedora, CentOS, RHEL)"
  echo " - brew: imagemagick or imagemagick@6 (MacOS)"
  echo "If $PKG_CONFIG_NAME is already installed, check that 'pkg-config' is in your"
  echo "PATH and PKG_CONFIG_PATH contains a $PKG_CONFIG_NAME.pc file. If pkg-config"
  echo "is unavailable you can set INCLUDE_DIR and LIB_DIR manually via:"
  echo "R CMD INSTALL --configure-vars='INCLUDE_DIR=... LIB_DIR=...'"
  echo "-------------------------- [ERROR MESSAGE] ---------------------------"
  cat configure.log
  echo "--------------------------------------------------------------------"
  exit 1
fi

# Write to Makevars
sed -e "s|@cflags@|$PKG_CFLAGS|" -e "s|@libs@|$PKG_LIBS|" src/Makevars.in > src/Makevars

# Dont use curl on webR
if [ `uname` = "Emscripten" ]; then
sed -i.bak 's/curl/utils/g' DESCRIPTION
fi

# Success
exit 0