Download assets from private Github releases

gh-dl-release

#!/usr/bin/env sh
# execute before running the script:
# export GITHUB_TOKEN='<mytoken>'
# usage: 
# <org/repo> <filename> <version or 'latest'> <savefilename>
# e.g.
# <org/repo> file.pdf latest latest_version_file.pdf
if [ $# -lt 4 ] ;then
    echo "Usage: <org/repo> <filename> <version or 'latest'> <savefilename>"
    exit 1
fi

if [ -n "$GITHUB_TOKEN" ]; then 
  echo "GITHUB_TOKEN is set"
else 
  echo "GITHUB_TOKEN not set"
  exit
fi

TOKEN="${GITHUB_TOKEN}"
REPO="$1"
ORG=$(echo $REPO | tr "/" "\n")
FILE="$2"      # the name of your release asset file, e.g. build.tar.gz
VERSION=$3                       # tag name or the word "latest"
SAVEFILENAME=$4
GITHUB_API_ENDPOINT="api.github.com"

alias errcho='>&2 echo'

if [ "$VERSION" = "latest" ]; then
  # Github should return the latest release first.
  PARSER=".[0].assets | map(select(.name == \"$FILE\"))[0].id"
else
  PARSER=". | map(select(.tag_name == \"$VERSION\"))[0].assets | map(select(.name == \"$FILE\"))[0].id"
fi

RESPONSE=`curl -sL -H "Authorization: token $TOKEN" -H "Accept: application/vnd.github.v3.raw" https://$GITHUB_API_ENDPOINT/repos/$REPO/releases`

# echo "Response: $RESPONSE"

ASSET_ID=`echo "$RESPONSE" | jq "$PARSER"`

# echo "Asset ID: $ASSET_ID"

if [ "$ASSET_ID" = "null" ]; then
  errcho "ERROR: version not found $VERSION"
  exit 1
fi

# echo "Getting asset $ASSET_ID" 

curl -sL -u "$ORG:$GITHUB_TOKEN" --header "Accept: application/octet-stream" https://api.github.com/repos/$REPO/releases/assets/$ASSET_ID > $SAVEFILENAME