nixpkgs/pkgs/data/themes/adi1090x-plymouth-themes/update.sh

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#!/usr/bin/env nix-shell
#! nix-shell -i bash --keep GITHUB_TOKEN -p nix-prefetch jq
set -eo pipefail
curl_args=( '--silent' )
# optionally takes a GITHUB_TOKEN to overcome api rate limiting.
if [ -n "$GITHUB_TOKEN" ]; then curl_args+=( --header "authorization: Bearer ${GITHUB_TOKEN}" ); fi
# get last master ref
curl_args+=( --url https://api.github.com/repos/adi1090x/files/commits/master )
last_ref=$(curl "${curl_args[@]}" | jq -r '.sha' )
unset curl_args[-1]
curl_args+=( https://api.github.com/repos/adi1090x/files/git/trees/$last_ref\?recursive=1 )
theme_archives=$(curl "${curl_args[@]}" \
| jq '.tree | map(select(.path| test("^plymouth-themes/themes/pack_.*tar.gz$"))| .path)')
dirname="$(dirname "$0")"
printf '{\n' > "$dirname/shas.nix"
repo_url="https://github.com/adi1090x/files/raw/$last_ref"
while
read -r file_path
do
name=$(basename $file_path)
printf ' "%s" = {\n url = "%s";\n sha = "%s";\n };\n' "${name%%.*}" "$repo_url/$file_path" "$(nix-prefetch-url "$repo_url/$file_path")" >>"$dirname/shas.nix"
done < <(jq -r '.[]' <<<"$theme_archives")
printf '}\n' >> "$dirname/shas.nix"