#!/bin/sh

# Copy external IRAF package source from the current working directory to
# $PREFIX/iraf_extern/package_name, add any configuration files from the conda
# recipe (eg. ur_extern.pkg) and update extern.pkg accordingly. This is
# normally done *before* building the package in place, since it (and its
# dependencies) already have to be defined in IRAF at build time and the source
# gets distributed anyway.
#
# This script is used by the AstroConda build process; users wanting pre-built
# AstroConda IRAF packages should instead install them with "conda install" or
# "conda create".

# Source some common IRAF package defs (and later other scripts) from the
# same directory as this one:
script_dir=`dirname "$0"`
script_dir=`cd "$script_dir"; pwd`  # canonical version
. "$script_dir/iraf_defs"

if [ -n "$1" -o -z "$PREFIX" -o -z "$RECIPE_DIR" -o -z "$PKG_NAME" ]; then
    echo "ERROR: `basename "$0"` should be called via \"conda build\""     >&2
    echo "       (with no arguments), to define the necessary environment" >&2
    exit 1
fi

# Create any new dirs & files with the expected permissions:
umask 022

# Strip any "iraf." from the Conda package name, to get the IRAF equivalent
# and determine the installation path accordingly:
pkg_name=`echo "$PKG_NAME" | sed -e 's|^iraf[.]||'`
pkg_path="${PREFIX}/${extern_dir}/${pkg_name}"

# Create the destination directory, if needed:
if ! mkdir -p "$pkg_path"; then
    echo "ERROR: failed to create $pkg_path" >&2
    exit 1
fi

# Ensure the destination is writeable (a bit redundant but clearer than the
# subsequent message for this case):
if [ ! -w "$pkg_path" ]; then
    echo "ERROR: cannot write to $pkg_path" >&2
    exit 1
fi

# Copy the package source (CWD contents) to its destination:
if ! tar cf - ./ | (cd "$pkg_path" && tar xf -); then
    echo "ERROR: failed to copy source to $pkg_path" >&2
    exit 1
fi

# Add package configuration files from the recipe (any source patches should
# have already been added separately by conda):
for file_name in $ac_iraf_files; do
    file_path="${RECIPE_DIR}/${file_name}"
    if [ -r "$file_path" ]; then
        if ! cp -p "$file_path" "$pkg_path"/; then
            echo "ERROR: failed to copy $file_name to $pkg_path" >&2
            exit 1
        fi
    fi
done

# Define the new package in the (temporary build-time) extern.pkg:
if ! "$script_dir/update_extern_pkg" "$PREFIX" "$pkg_name"; then
    echo "ERROR: failed to update $extern_pkg" >&2
    exit 1
fi

# Ensure status=0 on reaching the end (not some left-over condition value).
exit 0