abra/config/env.go

233 lines
5.8 KiB
Go

package config
import (
"errors"
"fmt"
"io/fs"
"io/ioutil"
"os"
"path"
"path/filepath"
"strings"
"github.com/joho/godotenv"
"github.com/sirupsen/logrus"
)
var ABRA_DIR = os.ExpandEnv("$HOME/.abra")
var ABRA_SERVER_FOLDER = path.Join(ABRA_DIR, "servers")
var APPS_JSON = path.Join(ABRA_DIR, "apps.json")
var APPS_DIR = path.Join(ABRA_DIR, "apps")
var REPOS_BASE_URL = "https://git.coopcloud.tech/coop-cloud"
// Type aliases to make code hints easier to understand
type AppEnv = map[string]string
type AppName = string
type App struct {
Name AppName
Type string
Domain string
Env AppEnv
File AppFile
}
type ByServer []App
func (a ByServer) Len() int { return len(a) }
func (a ByServer) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByServer) Less(i, j int) bool {
return strings.ToLower(a[i].File.Server) < strings.ToLower(a[j].File.Server)
}
type ByServerAndType []App
func (a ByServerAndType) Len() int { return len(a) }
func (a ByServerAndType) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByServerAndType) Less(i, j int) bool {
if a[i].File.Server == a[j].File.Server {
return strings.ToLower(a[i].Type) < strings.ToLower(a[j].Type)
} else {
return strings.ToLower(a[i].File.Server) < strings.ToLower(a[j].File.Server)
}
}
type ByType []App
func (a ByType) Len() int { return len(a) }
func (a ByType) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByType) Less(i, j int) bool {
return strings.ToLower(a[i].Type) < strings.ToLower(a[j].Type)
}
type ByName []App
func (a ByName) Len() int { return len(a) }
func (a ByName) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a ByName) Less(i, j int) bool {
return strings.ToLower(a[i].Name) < strings.ToLower(a[j].Name)
}
type AppFile struct {
Path string
Server string
}
type AppFiles = map[AppName]AppFile
func LoadAppFiles(servers ...string) (AppFiles, error) {
appFiles := make(AppFiles)
if len(servers) == 1 && servers[0] == "" {
// Empty servers flag, one string will always be passed
var err error
servers, err = getAllFoldersInDirectory(ABRA_SERVER_FOLDER)
if err != nil {
return nil, err
}
}
for _, server := range servers {
serverDir := path.Join(ABRA_SERVER_FOLDER, server)
files, err := getAllFilesInDirectory(serverDir)
if err != nil {
return nil, err
}
for _, file := range files {
appName := strings.TrimSuffix(file.Name(), ".env")
appFilePath := path.Join(ABRA_SERVER_FOLDER, server, file.Name())
appFiles[appName] = AppFile{
Path: appFilePath,
Server: server,
}
}
}
return appFiles, nil
}
// GetApp loads an apps settings, reading it from file, in preparation to use it
//
// ONLY use when ready to use the env file to keep IO down and
// because this exits with code 1 if the file cannot be found or is malformed
func GetApp(apps AppFiles, name AppName) (App, error) {
appFile, exists := apps[name]
if !exists {
return App{}, fmt.Errorf("cannot find app file with name '%s'", name)
}
app, err := readAppFile(appFile, name)
if err != nil {
return App{}, err
}
return app, nil
}
func GetApps(appFiles AppFiles) ([]App, error) {
var apps []App
for name := range appFiles {
app, err := GetApp(appFiles, name)
if err != nil {
return nil, err
}
apps = append(apps, app)
}
return apps, nil
}
// TODO: maybe better names than read and get
func readAppFile(appFile AppFile, name AppName) (App, error) {
env, err := readEnv(appFile.Path)
if err != nil {
return App{}, fmt.Errorf("env file for '%s' couldn't be read: %s", name, err.Error())
}
app, err := makeApp(env, name, appFile)
if err != nil {
return App{}, fmt.Errorf("env file for '%s' has issues: %s", name, err.Error())
}
return app, nil
}
func readEnv(filePath string) (AppEnv, error) {
var envFile AppEnv
envFile, err := godotenv.Read(filePath)
if err != nil {
return nil, err
}
return envFile, nil
}
func makeApp(env AppEnv, name string, appFile AppFile) (App, error) {
// Checking for type as it is required - apps wont work without it
domain := env["DOMAIN"]
apptype, ok := env["TYPE"]
if !ok {
return App{}, errors.New("missing TYPE variable")
}
return App{
Name: name,
Domain: domain,
Type: apptype,
Env: env,
File: appFile,
}, nil
}
func ReadServerNames() ([]string, error) {
serverNames, err := getAllFoldersInDirectory(ABRA_SERVER_FOLDER)
if err != nil {
return nil, err
}
return serverNames, nil
}
// getAllFilesInDirectory returns filenames of all files in directory
func getAllFilesInDirectory(directory string) ([]fs.FileInfo, error) {
var realFiles []fs.FileInfo
files, err := ioutil.ReadDir(directory)
if err != nil {
return nil, err
}
for _, file := range files {
// Follow any symlinks
filePath := path.Join(directory, file.Name())
realPath, err := filepath.EvalSymlinks(filePath)
if err != nil {
logrus.Warningf("broken symlink in your abra config folders: '%s'", filePath)
} else {
realFile, err := os.Stat(realPath)
if err != nil {
return nil, err
}
if !realFile.IsDir() {
realFiles = append(realFiles, file)
}
}
}
return realFiles, nil
}
// getAllFoldersInDirectory returns both folder and symlink paths
func getAllFoldersInDirectory(directory string) ([]string, error) {
var folders []string
files, err := ioutil.ReadDir(directory)
if err != nil {
return nil, err
}
if len(files) == 0 {
return nil, fmt.Errorf("directory is empty: '%s'", directory)
}
for _, file := range files {
// Check if file is directory or symlink
if file.IsDir() || file.Mode()&fs.ModeSymlink != 0 {
filePath := path.Join(directory, file.Name())
realDir, err := filepath.EvalSymlinks(filePath)
if err != nil {
logrus.Warningf("broken symlink in your abra config folders: '%s'", filePath)
} else if stat, err := os.Stat(realDir); err == nil && stat.IsDir() {
// path is a directory
folders = append(folders, file.Name())
}
}
}
return folders, nil
}