Download assets from private Github releases

download-gh-release

#!/bin/bash
#
# Usage:
#
#   download-gh-release {user}/{repo} {file} [{tag}]
#
repo=$1
file=$2
tag=${3:-latest}

# Construct parse expression
if [[ "$tag" = "latest" ]]; then
  parser=".[0].assets | map(select(.name == \"$file\"))[0].id"
else
  parser=". | map(select(.tag_name == \"$tag\"))[0].assets | map(select(.name == \"$file\"))[0].id"
fi

# Get releases
releases=$(curl -sL https://${GITHUB_TOKEN}@api.github.com/repos/${repo}/releases)

# Get asset_id
asset_id=$(echo $releases | jq "$parser")
if [[ "$assert_id" = "null" ]]; then
  echo "ERROR: '$tag' is not found" >&2
  exit 1
fi

# Download asset
curl -sLJO \
  -H 'Accept: application/octet-stream' \
  https://${GITHUB_TOKEN}@api.github.com/repos/${repo}/releases/assets/${asset_id}