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Download assets from private or public Github releases
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| #!/usr/bin/env bash | |
| # | |
| # This script downloads an asset from latest or specific Github release of a | |
| # public or private repo. | |
| # | |
| # PREREQUISITES: | |
| # | |
| # curl, wget, jq | |
| # | |
| set -eE -o functrace | |
| failure() { | |
| local lineno=$1 | |
| local msg=$2 | |
| echo "Failed at $lineno: $msg" | |
| } | |
| trap 'failure ${LINENO} "$BASH_COMMAND"' ERR | |
| set -o pipefail | |
| GITHUB="https://api.github.com" | |
| FILE_ASSETS="" | |
| FILE_OUTPUT="" | |
| REPOSITORY_URL="" | |
| TOKEN="" | |
| VERSION="latest" | |
| function showHelp() { | |
| echo "This script downloads an asset from latest or specific Github release of a public or private repo" | |
| echo | |
| echo "Usage: gh-dl-release.sh --file-assets VALUE --repository-url user/repo --version latest" | |
| echo | |
| echo "Syntax: gh-dl-release.sh [ -u;--update-scripts | -h;--help ]" | |
| echo "options:" | |
| echo "--file-assets : [Req.] The name of your release asset file, e.g. build.tar.gz " | |
| echo "--file-output : [Default => value of --file-assets] The name or path of your release asset file after download" | |
| echo "-r | --repository-url : [Req.] Repository url user/repo" | |
| echo "-v | --version : [Default => 'latest'] Tag name or release naming" | |
| echo "-t | --token : Auth Token for private repo" | |
| echo "-h | --help : Print help" | |
| echo | |
| exit 0 | |
| } | |
| function _parser() { | |
| options=$(getopt -l "help,file-assets:,file-output:,token:,repository-url:,version:" -o "h t: r: v:" -a -- "$@") | |
| eval set -- "$options" | |
| while true | |
| do | |
| case $1 in | |
| -h|--help) | |
| showHelp | |
| ;; | |
| --file-assets) | |
| FILE_ASSETS=${2} | |
| ;; | |
| --file-output) | |
| FILE_OUTPUT=${2} | |
| ;; | |
| -t|--token) | |
| TOKEN=${2} | |
| ;; | |
| -r|--repository-url) | |
| REPOSITORY_URL=${2} | |
| ;; | |
| -v|--version) | |
| VERSION=${2} | |
| ;; | |
| --) | |
| shift | |
| break;; | |
| esac | |
| shift | |
| done | |
| shift "$(($OPTIND -1))" | |
| if [[ -z ${FILE_ASSETS:-} || "${FILE_ASSETS}" == "" ]] ; then | |
| >&2 echo 'FILE_ASSETS is empty. Use option -fa or --file-assets' | |
| exit 1 | |
| fi | |
| if [[ -z ${REPOSITORY_URL:-} || "${REPOSITORY_URL}" == "" ]] ; then | |
| >&2 echo 'REPOSITORY_URL is empty. Use option -r or --repository-url' | |
| exit 1 | |
| fi | |
| if [[ -z ${VERSION:-} || "${VERSION}" == "" ]] ; then | |
| >&2 echo 'VERSION is empty. Use option -v or --version' | |
| exit 1 | |
| fi | |
| if [[ -z ${TOKEN:-} || "${TOKEN}" == "" ]] ; then | |
| echo "Token not set" | |
| fi | |
| if [[ -z ${FILE_OUTPUT:-} || "${FILE_OUTPUT}" == "" ]] ; then | |
| FILE_OUTPUT=${FILE_ASSETS} | |
| echo "File output -> ${FILE_OUTPUT}" | |
| fi | |
| } | |
| function github_curl() { | |
| curl -H "Authorization: token $TOKEN" -H "Accept: application/vnd.github.v3.raw" "$@" | |
| } | |
| function main(){ | |
| _parser "$@" | |
| local _URL | |
| if [ "${TOKEN}" == "" ] ; then | |
| _URL="https://github.com/${REPOSITORY_URL}/releases/download/${VERSION}/${FILE_ASSETS}" | |
| wget "${_URL}" -O "${FILE_OUTPUT}" | |
| exit 0 | |
| fi | |
| local _JQ_EXPRESSION | |
| if [ "$VERSION" = "latest" ]; then | |
| # Github should return the latest release first. | |
| _JQ_EXPRESSION=".[0].assets | map(select(.name == \"${FILE_ASSETS}\"))[0].id" | |
| else | |
| _JQ_EXPRESSION=". | map(select(.tag_name == \"$VERSION\"))[0].assets | map(select(.name == \"$FILE_ASSETS\"))[0].id" | |
| fi; | |
| local _ASSET_ID | |
| _ASSET_ID=$(github_curl -s "${GITHUB}/repos/${REPOSITORY_URL}/releases") | |
| if [[ "${_ASSET_ID}" =~ "Bad credentials" ]]; then | |
| >&2 echo "Token not valid" | |
| exit 1 | |
| fi | |
| _ASSET_ID=$(echo "${_ASSET_ID}" | jq "${_JQ_EXPRESSION}") | |
| if [ "${_ASSET_ID}" == "null" ] ; then | |
| >&2 echo "ERROR: version not found $VERSION" | |
| exit 1 | |
| fi; | |
| _URL="https://${TOKEN}:@api.github.com/repos/${REPOSITORY_URL}/releases/assets/${_ASSET_ID}" | |
| wget -nv --auth-no-challenge --header='Accept:application/octet-stream' "${_URL}" -O "${FILE_OUTPUT}" | |
| } | |
| main "$@" |
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