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// Copyright The Notary Project Authors.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package utils
import (
"path/filepath"
"github.com/onsi/ginkgo/v2"
)
// VirtualHost is a virtualized host machine isolated by environment variable.
type VirtualHost struct {
Executor *ExecOpts
userDir string
env map[string]string
}
// NewVirtualHost creates a temporary user-level directory and updates
// the "XDG_CONFIG_HOME" environment variable for Executor of the VirtualHost.
func NewVirtualHost(binPath string, options ...HostOption) (*VirtualHost, error) {
vhost := &VirtualHost{
Executor: Binary(binPath),
}
// setup a temp user directory
vhost.userDir = ginkgo.GinkgoT().TempDir()
// set user dir environment variables
vhost.UpdateEnv(UserConfigEnv(vhost.userDir))
// set options
vhost.SetOption(options...)
return vhost, nil
}
// AbsolutePath returns the absolute path for the given path
// elements that are relative to the user directory.
func (h *VirtualHost) AbsolutePath(elem ...string) string {
userElem := []string{h.userDir}
userElem = append(userElem, elem...)
return filepath.Join(userElem...)
}
// UpdateEnv updates the environment variables for the VirtualHost.
func (h *VirtualHost) UpdateEnv(env map[string]string) {
if h.env == nil {
h.env = make(map[string]string)
}
for key, value := range env {
h.env[key] = value
}
// update ExecOpts.env
h.Executor.WithEnv(h.env)
}
// SetOption sets the options for the host.
func (h *VirtualHost) SetOption(options ...HostOption) {
for _, option := range options {
if err := option(h); err != nil {
panic(err)
}
}
}
// HostOption is a function to set the host configuration.
type HostOption func(vhost *VirtualHost) error
// UserConfigEnv creates environment variable for changing
// user config dir (By setting $XDG_CONFIG_HOME).
func UserConfigEnv(dir string) map[string]string {
// create and set user dir for linux
return map[string]string{
"XDG_CONFIG_HOME": dir,
}
}
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