#!/bin/bash

set -e

pluginspath="$GOPATH/src/github.com/mholt/caddy/caddy/caddymain/install_plugins.go"

plugin() {
  echo "*** Fetching plugin $1..."

  # Generate Go import path from given Git URL
  importpath="${3:-$(echo "$1" | sed -e 's,^.\+://,,' -e 's,\.git$,,')}"
  git clone "$1" "$GOPATH/src/$importpath"

  (
    cd "$GOPATH/src/$importpath"

    # Checkout wanted version if any given
    if [ ! -z "$2" ]
    then
      git checkout "$2"
    fi

    echo "*** Preparing plugin $1..."

    # Fetch dependencies
    go get -d -v .

    # Run generate across all files (if any extra tools are necessary you will
    # need to install them before running this script)
    go generate -v .
  )

  docker-caddy-remove-git-metadata

  # Add the newly available plugin to an extra Go source file that will be
  # compiled into the Caddy binary along with the rest of the source tree.
  if [ ! -e "$pluginspath" ]
  then
    echo "package caddymain" > "$pluginspath"
  fi
  echo "*** Adding ${importpath} to $pluginspath..."
  echo "import _ \"${importpath}\"" >> "$pluginspath"
}

docker-caddy-unpack-source

# Parse arguments and prepare each given plugin.
# Supported syntaxes (where reference can be a commit hash or branch name etc.):
#   - http://server.com/user/repository.git
#   - https://server.com/user/repository.git
#   - git://server.com/user/repository.git
#   - http://server.com/user/repository.git#reference
#   - https://server.com/user/repository.git#reference
#   - git://server.com/user/repository.git#reference
for plugin in "$@"; do
    (IFS='#'; plugin $plugin);
done

# Rebuild Caddy with the given plugins now installed
exec docker-caddy-build