github_repo_version_scan.sh

#!/bin/bash
set -e
SCRIPT_NAME=$(basename $0)

pre_config(){
    apt update && wait && apt install unzip zip wget logrotate
}

parse_json(){
    echo "${1//\"/}" | tr -d '\n' | tr -d '\r' | sed "s/.*$2:\([^,}]*\).*/\1/"
}

get_repo_version(){
    local REMOTE_REPO_VERSION=""
    local LATEST_RELEASE_INFO=$(curl --silent https://api.github.com/repos/$1/releases/latest)
    if ! echo "$LATEST_RELEASE_INFO" | grep -q "Not Found"; then
        REMOTE_REPO_VERSION=$(parse_json "$LATEST_RELEASE_INFO" "tag_name")
    fi
    echo $REMOTE_REPO_VERSION | tr -d '\r\n'
}

check_need_build(){
    remote_version=$2
    this_version=$1
    need_build="no"
    if [[ ${this_version:0:1} != "v" ]]; then
        need_build="yes"
        echo $need_build
        return
    fi

    remote_version_no_v=${remote_version:1}
    this_version_no_v=${this_version:1}
    sorted_versions=$(echo -e "$remote_version_no_v\n$this_version_no_v" | sort -V)

    small_version=$(echo "$sorted_versions" | head -n1)
    if [ "$remote_version_no_v" != "$small_version" ]; then
        need_build="yes"
        break
    fi
    echo $need_build
}

get_repo_latest_upload_url(){
    local LATEST_UPLOAD_URL=""
    local LATEST_RELEASE_INFO=$(curl --silent https://api.github.com/repos/$1/releases/latest)
    if ! echo "$LATEST_RELEASE_INFO" | grep -q "Not Found"; then
        LATEST_UPLOAD_URL=$(parse_json "$LATEST_RELEASE_INFO" "upload_url"),label}
    fi
    echo $LATEST_UPLOAD_URL
}

check_file_exist_from_repo_latest(){
    local response=$(curl --silent https://api.github.com/repos/$1/releases/latest)
    local assetNames=$(echo "$response" | grep -oP '"name": "\K[^"]+')
    assetExists="no"
    for name in $assetNames; do
      if [[ "$name" == "$2" ]]; then
        assetExists="yes"
        break
      fi
    done
    echo $assetExists
}

handle_input(){
    if [[ $1 == "--check_need_update" ]]; then
        local current_repo_rul=$2
        local remote_repo_url=$3


        if [[ $current_repo_rul == "" ]] || [[ $current_repo_rul == " " ]] || [[ $remote_repo_url == "" ]] || [[ $remote_repo_url == " " ]]; then
            echo "{\"code\":-1,\"msg\":\"Input Prarms Error：Prarms Cannot Be Empty\"}"
            return
        fi

        if [[ $(echo "$current_repo_rul" | cut -d'/' -f1) != "github.com" ]] || [[ $(echo "$remote_repo_url" | cut -d'/' -f1) != "github.com" ]]; then
            echo "{\"code\":-1,\"msg\":\"This Script Only github.com is supported\"}"
            return
        fi

        local current_repo_suffix=$(echo "$current_repo_rul" | cut -d'/' -f2-)
        local remote_repo_suffix=$(echo "$remote_repo_url" | cut -d'/' -f2-)

        local current_repo_latest_version=$(get_repo_version "$current_repo_suffix")
        if [[ $current_repo_latest_version == "" ]] || [[ $current_repo_latest_version == " " ]]; then
            local isTrue="yes"
            echo $isTrue
            return
        fi

        local remote_repo_latest_version=$(get_repo_version "$remote_repo_suffix")

        check_need_build "$current_repo_latest_version" "$remote_repo_latest_version"
    elif [[ $1 == "--get_latest_version" ]]; then
        local latest_version=$(get_repo_version "$(echo "$2" | cut -d'/' -f2-)")
        echo $latest_version | tr -d '\r\n'
    elif [[ $1 == "--get_latest_upload_url" ]]; then
        local latest_upload_url=$(get_repo_latest_upload_url "$(echo "$2" | cut -d'/' -f2-)")
        echo $latest_upload_url | tr -d '\r\n'
    elif [[ $1 == "--check_file_exist_from_repo_latest" ]]; then
        local is_exist=$(check_file_exist_from_repo_latest "$(echo "$2" | cut -d'/' -f2-)" "$3")
        echo $is_exist | tr -d '\r\n'
    else
        echo "{\"code\":-1,\"msg\":\"Methods not yet supported\"}"
    fi
}

handle_input "$@"