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gitea/modules/setting/path.go

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5.5 KiB
Go

// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package setting
import (
"errors"
"os"
"os/exec"
"path/filepath"
"strings"
"code.gitea.io/gitea/modules/log"
)
var (
// AppPath represents the path to the gitea binary
AppPath string
// AppWorkPath is the "working directory" of Gitea. It maps to the: WORK_PATH in app.ini, "--work-path" flag, environment variable GITEA_WORK_DIR.
// If that is not set it is the default set here by the linker or failing that the directory of AppPath.
// It is used as the base path for several other paths.
AppWorkPath string
CustomPath string // Custom directory path. Env: GITEA_CUSTOM
CustomConf string
appWorkPathBuiltin string
customPathBuiltin string
customConfBuiltin string
AppWorkPathMismatch bool
)
func getAppPath() (string, error) {
var appPath string
var err error
if IsWindows && filepath.IsAbs(os.Args[0]) {
appPath = filepath.Clean(os.Args[0])
} else {
appPath, err = exec.LookPath(os.Args[0])
}
if err != nil {
if !errors.Is(err, exec.ErrDot) {
return "", err
}
appPath, err = filepath.Abs(os.Args[0])
}
if err != nil {
return "", err
}
appPath, err = filepath.Abs(appPath)
if err != nil {
return "", err
}
// Note: (legacy code) we don't use path.Dir here because it does not handle case which path starts with two "/" in Windows: "//psf/Home/..."
return strings.ReplaceAll(appPath, "\\", "/"), err
}
func init() {
var err error
if AppPath, err = getAppPath(); err != nil {
log.Fatal("Failed to get app path: %v", err)
}
if AppWorkPath == "" {
AppWorkPath = filepath.Dir(AppPath)
}
appWorkPathBuiltin = AppWorkPath
customPathBuiltin = CustomPath
customConfBuiltin = CustomConf
}
type ArgWorkPathAndCustomConf struct {
WorkPath string
CustomPath string
CustomConf string
}
type stringWithDefault struct {
Value string
IsSet bool
}
func (s *stringWithDefault) Set(v string) {
s.Value = v
s.IsSet = true
}
// InitWorkPathAndCommonConfig will set AppWorkPath, CustomPath and CustomConf, init default config provider by CustomConf and load common settings,
func InitWorkPathAndCommonConfig(getEnvFn func(name string) string, args ArgWorkPathAndCustomConf) {
InitWorkPathAndCfgProvider(getEnvFn, args)
LoadCommonSettings()
}
// InitWorkPathAndCfgProvider will set AppWorkPath, CustomPath and CustomConf, init default config provider by CustomConf
func InitWorkPathAndCfgProvider(getEnvFn func(name string) string, args ArgWorkPathAndCustomConf) {
tryAbsPath := func(paths ...string) string {
s := paths[len(paths)-1]
for i := len(paths) - 2; i >= 0; i-- {
if filepath.IsAbs(s) {
break
}
s = filepath.Join(paths[i], s)
}
return s
}
var err error
tmpWorkPath := stringWithDefault{Value: appWorkPathBuiltin}
if tmpWorkPath.Value == "" {
tmpWorkPath.Value = filepath.Dir(AppPath)
}
tmpCustomPath := stringWithDefault{Value: customPathBuiltin}
if tmpCustomPath.Value == "" {
tmpCustomPath.Value = "custom"
}
tmpCustomConf := stringWithDefault{Value: customConfBuiltin}
if tmpCustomConf.Value == "" {
tmpCustomConf.Value = "conf/app.ini"
}
readFromEnv := func() {
envWorkPath := getEnvFn("GITEA_WORK_DIR")
if envWorkPath != "" {
tmpWorkPath.Set(envWorkPath)
if !filepath.IsAbs(tmpWorkPath.Value) {
log.Fatal("GITEA_WORK_DIR (work path) must be absolute path")
}
}
envCustomPath := getEnvFn("GITEA_CUSTOM")
if envCustomPath != "" {
tmpCustomPath.Set(envCustomPath)
if !filepath.IsAbs(tmpCustomPath.Value) {
log.Fatal("GITEA_CUSTOM (custom path) must be absolute path")
}
}
}
readFromArgs := func() {
if args.WorkPath != "" {
tmpWorkPath.Set(args.WorkPath)
if !filepath.IsAbs(tmpWorkPath.Value) {
log.Fatal("--work-path must be absolute path")
}
}
if args.CustomPath != "" {
tmpCustomPath.Set(args.CustomPath) // if it is not abs, it will be based on work-path, it shouldn't happen
if !filepath.IsAbs(tmpCustomPath.Value) {
log.Error("--custom-path must be absolute path")
}
}
if args.CustomConf != "" {
tmpCustomConf.Set(args.CustomConf)
if !filepath.IsAbs(tmpCustomConf.Value) {
// the config path can be relative to the real current working path
if tmpCustomConf.Value, err = filepath.Abs(tmpCustomConf.Value); err != nil {
log.Fatal("Failed to get absolute path of config %q: %v", tmpCustomConf.Value, err)
}
}
}
}
readFromEnv()
readFromArgs()
if !tmpCustomConf.IsSet {
tmpCustomConf.Set(tryAbsPath(tmpWorkPath.Value, tmpCustomPath.Value, tmpCustomConf.Value))
}
// only read the config but do not load/init anything more, because the AppWorkPath and CustomPath are not ready
InitCfgProvider(tmpCustomConf.Value)
if HasInstallLock(CfgProvider) {
ClearEnvConfigKeys() // if the instance has been installed, do not pass the environment variables to sub-processes
}
configWorkPath := ConfigSectionKeyString(CfgProvider.Section(""), "WORK_PATH")
if configWorkPath != "" {
if !filepath.IsAbs(configWorkPath) {
log.Fatal("WORK_PATH in %q must be absolute path", configWorkPath)
}
configWorkPath = filepath.Clean(configWorkPath)
if tmpWorkPath.Value != "" && (getEnvFn("GITEA_WORK_DIR") != "" || args.WorkPath != "") {
fi1, err1 := os.Stat(tmpWorkPath.Value)
fi2, err2 := os.Stat(configWorkPath)
if err1 != nil || err2 != nil || !os.SameFile(fi1, fi2) {
AppWorkPathMismatch = true
}
}
tmpWorkPath.Set(configWorkPath)
}
tmpCustomPath.Set(tryAbsPath(tmpWorkPath.Value, tmpCustomPath.Value))
AppWorkPath = tmpWorkPath.Value
CustomPath = tmpCustomPath.Value
CustomConf = tmpCustomConf.Value
}