upload.sh

#!/usr/bin/env bash
#
# Author: Stefan Buck
# https://gist.github.com/stefanbuck/ce788fee19ab6eb0b4447a85fc99f447
#
#
# This script accepts the following parameters:
#
# * owner
# * repo
# * tag
# * filename
# * github_api_token
#
# Script to upload a release asset using the GitHub API v3.
#
# Example:
#
# upload-github-release-asset.sh github_api_token=TOKEN owner=stefanbuck repo=playground tag=v0.1.0 filename=./build.zip
#

# Check dependencies.
set -e
xargs=$(which gxargs || which xargs)

# Validate settings.
[ "$TRACE" ] && set -x

CONFIG=$@

for line in $CONFIG; do
	  eval "$line"
  done

  # Define variables.
  GH_API="https://api.github.com"
  GH_REPO="$GH_API/repos/$owner/$repo"
  GH_TAGS="$GH_REPO/releases/tags/$tag"
  AUTH="Authorization: token $github_api_token"
  WGET_ARGS="--content-disposition --auth-no-challenge --no-cookie"
  CURL_ARGS="-LJO#"

  if [[ "$tag" == 'LATEST' ]]; then
	    GH_TAGS="$GH_REPO/releases/latest"
    fi

    # Validate token.
    curl -o /dev/null -sH "$AUTH" $GH_REPO || { echo "Error: Invalid repo, token or network issue!";  exit 1; }

    # Read asset tags.
    response=$(curl -sH "$AUTH" $GH_TAGS)

    # Get ID of the asset based on given filename.
    eval $(echo "$response" | grep -m 1 "id.:" | grep -w id | tr : = | tr -cd '[[:alnum:]]=')
    [ "$id" ] || { echo "Error: Failed to get release id for tag: $tag"; echo "$response" | awk 'length($0)<100' >&2; exit 1; }

    # Upload asset
    echo "Uploading asset... $localAssetPath" >&2

    # Construct url
    GH_ASSET="https://uploads.github.com/repos/$owner/$repo/releases/$id/assets?name=$(basename $filename)"

    curl "$GITHUB_OAUTH_BASIC" --data-binary @"$filename" -H "Authorization: token $github_api_token" -H "Content-Type: application/octet-stream" $GH_ASSET