github release : list, create, and upload

github-release.sh

#!/usr/bin/env bash
set -e;
[ "$TRACE" ] && set -x;

GH_API="https://api.github.com";
GH_UPLOADS="https://uploads.github.com";

__print_help_arg() {
	SHORT="$1";
	LONG="$2";
	DESC="${@:3}";
	(>&2 echo -e "-$SHORT|--$LONG\t$DESC");
}
__help() {
	(>&2 echo -e "$@");
}
__print_help() {
	l="$0 list --token=GITHUB_TOKEN --owner=REPO_OWNER --repo=REPO_NAME";
	c="$0 create --token=GITHUB_TOKEN --owner=REPO_OWNER --repo=REPO_NAME --tag=TAG_NAME [--draft] [--pre]";
	u="$0 upload --token=GITHUB_TOKEN --owner=REPO_OWNER --repo=REPO_NAME --id=RELEASE_ID --filename=/path/to/file";
	case $1 in
		list)
			__help "$l";
			__help "";
			__print_help_arg "a" "token" "The github auth token.";
			__print_help_arg "o" "owner" "The owner or org that owns the repository.";
			__print_help_arg "r" "repo" "The name of the repository.";
		;;
		create)
			__help "$c";
			__help "";
			__print_help_arg "a" "token" "The github auth token.";
			__print_help_arg "o" "owner" "The owner or org that owns the repository.";
			__print_help_arg "r" "repo" "The name of the repository.";
			__print_help_arg "t" "tag" "The commit tag name. Will be used to associate to, and the name of the release.";
			__print_help_arg "d" "draft" "Flag to indicate if the release is a draft.";
			__print_help_arg "p" "pre" "Flag to indicate if the release is a pre-release.";
		;;
		upload)
			__help "$u";
			__help "";
			__print_help_arg "a" "token" "The github auth token.";
			__print_help_arg "o" "owner" "The owner or org that owns the repository.";
			__print_help_arg "r" "repo" "The name of the repository.";
			__print_help_arg "i" "id\t" "The id of the release to upload the file to.";
			__print_help_arg "f" "filename" "The full path of a file to upload to the release";
		;;
		*)
			__help "Usage: $0 <command> <arguments>";

			__help "";
			__help "list";
			__help "\t$l";
			__help "\tFor full help: $0 list --help";

			__help "";
			__help "create";
			__help "\t$c";
			__help "\tFor full help: $0 create --help";

			__help "";
			__help "upload";
			__help "\t$u";
			__help "\tFor full help: $0 upload --help";
		;;
	esac
	exit 1;
}

__error() {
	RED='\033[0;31m';
	NC='\033[0m';
	dt=$(date "+%F %T");
	caller=$(basename $0);
	__help "${RED}[${dt}]\tERROR\t${caller}\t${1:-"Unknown Error"}${NC}";
	exit 1;
}

__warning() {
	YELLOW='\033[0;33m';
	NC='\033[0m';
	dt=$(date "+%F %T");
	caller=$(basename $0);
	__help "${RED}[${dt}]\tERROR\t${caller}\t${1:-"Unknown Error"}${NC}";
	exit 1;
}

__command() {
	case $1 in
		list)
			__list "${@:2}";
		;;
		create)
			__create "${@:2}";
		;;
		upload)
			__upload "${@:2}";
		;;
		*)
			__print_help;
		;;
	esac
}

__list() {
	for i in "$@"; do
		case $i in
			-a=*|--token=*)
				opt_token="${i#*=}";
				shift; # past argument=value
			;;
			-o=*|--owner=*)
				opt_owner="${i#*=}";
				shift; # past argument=value
			;;
			-r=*|--repo=*)
				opt_repo="${i#*=}";
				shift; # past argument=value
			;;
			*)
				__print_help "list";
			;;
		esac
	done

	[[ -z "${opt_token// }" ]] && __error "--token parameter is required, but was not defined with a value.";
	[[ -z "${opt_owner// }" ]] && __error "--owner parameter is required, but was not defined with a value.";
	[[ -z "${opt_repo// }" ]] && __error "--repo parameter is required, but was not defined with a value.";


	GH_REPO="$GH_API/repos/$opt_owner/$opt_repo";
	AUTH="Authorization: token $opt_token";

	# Validate token.
	curl -o /dev/null -sH "$AUTH" $GH_REPO || { __error "Error: Invalid repo, token or network issue!"; }

	data=$(curl -sH "$AUTH" "${GH_REPO}/releases" | jq -r '.[] | "\(.id)\t\t\(.name)\t\t\(.tag_name)\t\t\(.target_commitish)" ');


	__help "ID\t\tNAME\t\tTAG\t\tTARGET";
	printf '%s' "$data";
}

__create() {
	for i in "$@"; do
		case $i in
			-a=*|--token=*)
				opt_token="${i#*=}";
				shift; # past argument=value
			;;
			-o=*|--owner=*)
				opt_owner="${i#*=}";
				shift; # past argument=value
			;;
			-r=*|--repo=*)
				opt_repo="${i#*=}";
				shift; # past argument=value
			;;
			-t=*|--tag=*)
				opt_tag="${i#*=}";
				shift; # past argument with no value
			;;
			# flag as draft
			-d|--draft)
				opt_draft=1;
				shift;
			;;
			-p|--pre)
				opt_prerelease=1;
				shift;
			;;
			*)
				__print_help "create";
			;;
		esac
	done

	[[ -z "${opt_token// }" ]] && __error "--token parameter is required, but was not defined with a value.";
	[[ -z "${opt_owner// }" ]] && __error "--owner parameter is required, but was not defined with a value.";
	[[ -z "${opt_repo// }" ]] && __error "--repo parameter is required, but was not defined with a value.";
	[[ -z "${opt_tag// }" ]] && __error "--tag parameter is required, but was not defined with a value.";


	# Define variables.
	GH_API="https://api.github.com";
	GH_REPO="$GH_API/repos/$opt_owner/$opt_repo";
	GH_TAGS="$GH_REPO/releases/tags/$opt_tag";
	GH_CREATE="$GH_REPO/releases";
	AUTH="Authorization: token $opt_token";

	# Validate token.
	curl -o /dev/null -sH "$AUTH" $GH_REPO || { __error "Error: Invalid repo, token or network issue!"; }
	is_draft="false";
	[[ $opt_draft -eq 1 ]] && is_draft="true";
	is_prerelease="false";

	# create release
	id=$(curl -X POST -sH "$AUTH" -H "Content-Type: application/json" -d \
		"{ \"tag_name\": \"$opt_tag\", \"name\": \"$opt_tag\", \"draft\": $is_draft, \"prerelease\": false }" \
		$GH_CREATE | jq -r ' .id ');

	[[ -z "${id}" ]] && __error "$id";

	echo "${id}";
}

__upload() {
	for i in "$@"; do
		case $i in
			-a=*|--token=*)
				opt_token="${i#*=}";
				shift; # past argument=value
			;;
			-o=*|--owner=*)
				opt_owner="${i#*=}";
				shift; # past argument=value
			;;
			-r=*|--repo=*)
				opt_repo="${i#*=}";
				shift; # past argument=value
			;;
			-i=*|--id=*)
				opt_id="${i#*=}";
				shift;
			;;
			-f=*|--filename=*)
				opt_filename="${i#*=}";
				shift;
			;;
			*)
			__print_help "upload";
		esac
	done

	__help "opt_filename: $opt_filename";
	__help "opt_owner: $opt_owner";
	
	[[ -z "${opt_token// }" ]] && __error "--token parameter is required, but was not defined with a value.";
	[[ -z "${opt_owner// }" ]] && __error "--owner parameter is required, but was not defined with a value.";
	[[ -z "${opt_repo// }" ]] && __error "--repo parameter is required, but was not defined with a value.";
	[[ -z "${opt_id// }" ]] && __error "--id parameter is required, but was not defined with a value.";
	[[ -z "${opt_filename// }" ]] && __error "--filename parameter is required, but was not defined with a value.";
	[[ ! -f "${opt_filename}" ]] && __error "'${opt_filename}' does not exist.";
	
	__help "Uploading asset... $opt_filename";
	AUTH="Authorization: token $opt_token";
	GH_ASSET="$GH_UPLOADS/repos/$opt_owner/$opt_repo/releases/$opt_id/assets?name=$(basename $opt_filename)";
	upload="$(curl --data-binary @"$opt_filename" -H "$AUTH" -H "Content-Type: application/octet-stream" $GH_ASSET)";

	echo $upload | jq -r ' .browser_download_url ';
}

__command "$@";

exit 0;