mirror of
https://github.com/gravitational/teleport
synced 2024-10-22 18:23:25 +00:00
b1eae4ac4c
This code is not caught by linters because it's exported and they assume there's some external users. Since teleport is relatively self-contained, we can tell for sure whether something is called or not.
144 lines
3.8 KiB
Go
144 lines
3.8 KiB
Go
/*
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Copyright 2015 Gravitational, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package utils
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import (
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"os"
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"path/filepath"
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"runtime"
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"github.com/gravitational/teleport"
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"github.com/gravitational/trace"
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)
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// EnsureLocalPath makes sure the path exists, or, if omitted results in the subpath in
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// default gravity config directory, e.g.
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//
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// EnsureLocalPath("/custom/myconfig", ".gravity", "config") -> /custom/myconfig
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// EnsureLocalPath("", ".gravity", "config") -> ${HOME}/.gravity/config
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//
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// It also makes sure that base dir exists
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func EnsureLocalPath(customPath string, defaultLocalDir, defaultLocalPath string) (string, error) {
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if customPath == "" {
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homeDir := getHomeDir()
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if homeDir == "" {
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return "", trace.BadParameter("no path provided and environment variable %v is not not set", teleport.EnvHome)
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}
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customPath = filepath.Join(homeDir, defaultLocalDir, defaultLocalPath)
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}
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baseDir := filepath.Dir(customPath)
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_, err := StatDir(baseDir)
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if err != nil {
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if trace.IsNotFound(err) {
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if err := MkdirAll(baseDir, teleport.PrivateDirMode); err != nil {
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return "", trace.Wrap(err)
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}
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} else {
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return "", trace.Wrap(err)
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}
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}
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return customPath, nil
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}
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// MkdirAll creates directory and subdirectories
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func MkdirAll(targetDirectory string, mode os.FileMode) error {
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err := os.MkdirAll(targetDirectory, mode)
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if err != nil {
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return trace.ConvertSystemError(err)
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}
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return nil
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}
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// RemoveDirCloser removes directory and all it's contents
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// when Close is called
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type RemoveDirCloser struct {
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Path string
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}
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// Close removes directory and all it's contents
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func (r *RemoveDirCloser) Close() error {
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return trace.ConvertSystemError(os.RemoveAll(r.Path))
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}
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// IsDir is a helper function to quickly check if a given path is a valid directory
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func IsDir(dirPath string) bool {
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fi, err := os.Stat(dirPath)
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if err == nil {
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return fi.IsDir()
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}
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return false
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}
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// NormalizePath normalises path, evaluating symlinks and converting local
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// paths to absolute
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func NormalizePath(path string) (string, error) {
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s, err := filepath.Abs(path)
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if err != nil {
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return "", trace.ConvertSystemError(err)
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}
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abs, err := filepath.EvalSymlinks(s)
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if err != nil {
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return "", trace.ConvertSystemError(err)
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}
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return abs, nil
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}
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// OpenFile opens file and returns file handle
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func OpenFile(path string) (*os.File, error) {
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newPath, err := NormalizePath(path)
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if err != nil {
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return nil, trace.Wrap(err)
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}
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fi, err := os.Stat(newPath)
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if err != nil {
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return nil, trace.ConvertSystemError(err)
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}
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if fi.IsDir() {
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return nil, trace.BadParameter("%v is not a file", path)
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}
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f, err := os.Open(newPath)
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if err != nil {
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return nil, trace.ConvertSystemError(err)
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}
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return f, nil
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}
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// StatDir stats directory, returns error if file exists, but not a directory
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func StatDir(path string) (os.FileInfo, error) {
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fi, err := os.Stat(path)
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if err != nil {
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return nil, trace.ConvertSystemError(err)
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}
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if !fi.IsDir() {
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return nil, trace.BadParameter("%v is not a directory", path)
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}
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return fi, nil
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}
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// getHomeDir returns the home directory based off the OS.
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func getHomeDir() string {
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switch runtime.GOOS {
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case teleport.LinuxOS:
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return os.Getenv(teleport.EnvHome)
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case teleport.DarwinOS:
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return os.Getenv(teleport.EnvHome)
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case teleport.WindowsOS:
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return os.Getenv(teleport.EnvUserProfile)
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}
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return ""
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}
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