#! /bin/bash
#
# Strip Packages
# 
# This is script that goes through all conda packages in the current
# directory and removes everything except the essential "info" metadata
# folder. It also updates the metadata so that this package can be installed
# by conda without failing package validation.

echo "Processing .conda files"
for f in $(ls *.conda); do
    dir_name=$(echo "$f" | sed -e "s/.conda$//")
    cph extract "$f"
    find "$dir_name" -not -path "$dir_name" -not -path "$dir_name/info*"  -exec rm -rf {} +

    package_name=$(cat "$dir_name/info/index.json" | jq -r '.name')
    mkdir -p "$dir_name/include/$package_name/"

    echo "# Mock package" > "$dir_name/include/$package_name/README"

    sha=$(sha256sum "$dir_name/include/$package_name/README" | cut -d ' ' -f1)
    echo "include/$package_name/README" > "$dir_name/info/files"

    cat <<EOF> "$dir_name/info/paths.json"
{
    "paths": [
        {
            "_path": "include/$package_name/README",
            "path_type": "hardlink",
            "sha256": "$sha",
            "size_in_bytes": 15
        }
    ],
    "paths_version": 1
}
EOF

    cph create "$dir_name" "$dir_name.conda"
    rm -rf "$dir_name"
done

echo "Processing .tar.bz2 files"
for f in $(ls *.tar.bz2); do
    dir_name=$(echo "$f" | sed -e "s/.tar.bz2$//")
    cph extract "$f"
    find "$dir_name" -not -path "$dir_name" -not -path "$dir_name/info*"  -exec rm -rf {} +

    package_name=$(cat "$dir_name/info/index.json" | jq -r '.name')
    mkdir -p "$dir_name/include/$package_name/"

    echo "# Mock package" > "$dir_name/include/$package_name/README"

    sha=$(sha256sum "$dir_name/include/$package_name/README" | cut -d ' ' -f1)
    echo "include/$package_name/README" > "$dir_name/info/files"

    cat <<EOF> "$dir_name/info/paths.json"
{
    "paths": [
        {
            "_path": "include/$package_name/README",
            "path_type": "hardlink",
            "sha256": "$sha",
            "size_in_bytes": 15
        }
    ],
    "paths_version": 1
}
EOF

    cph create "$dir_name" "$dir_name.tar.bz2"
    rm -rf "$dir_name"
done