68 lines
1.6 KiB
Go
68 lines
1.6 KiB
Go
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package clientconfig
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import (
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"fmt"
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"io/ioutil"
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"os"
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"os/user"
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"path/filepath"
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)
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// findAndLoadYAML attempts to locate a clouds.yaml file in the following
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// locations:
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//
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// 1. OS_CLIENT_CONFIG_FILE
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// 2. Current directory.
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// 3. unix-specific user_config_dir (~/.config/openstack/clouds.yaml)
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// 4. unix-specific site_config_dir (/etc/openstack/clouds.yaml)
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//
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// If found, the contents of the file is returned.
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func findAndReadYAML() ([]byte, error) {
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// OS_CLIENT_CONFIG_FILE
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if v := os.Getenv("OS_CLIENT_CONFIG_FILE"); v != "" {
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if ok := fileExists(v); ok {
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return ioutil.ReadFile(v)
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}
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}
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// current directory
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cwd, err := os.Getwd()
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if err != nil {
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return nil, fmt.Errorf("unable to determine working directory: %s", err)
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}
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filename := filepath.Join(cwd, "clouds.yaml")
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if ok := fileExists(filename); ok {
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return ioutil.ReadFile(filename)
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}
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// unix user config directory: ~/.config/openstack.
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currentUser, err := user.Current()
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if err != nil {
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return nil, fmt.Errorf("unable to get current user: %s", err)
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}
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homeDir := currentUser.HomeDir
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if homeDir != "" {
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filename := filepath.Join(homeDir, ".config/openstack/clouds.yaml")
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if ok := fileExists(filename); ok {
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return ioutil.ReadFile(filename)
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}
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}
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// unix-specific site config directory: /etc/openstack.
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if ok := fileExists("/etc/openstack/clouds.yaml"); ok {
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return ioutil.ReadFile("/etc/openstack/clouds.yaml")
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}
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return nil, fmt.Errorf("no clouds.yaml file found")
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}
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// fileExists checks for the existence of a file at a given location.
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func fileExists(filename string) bool {
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if _, err := os.Stat(filename); err == nil {
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return true
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}
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return false
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}
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