added some features

- Added `cron` command to run lists with `cron` time specifed
- Changed `-c` flag to `-f` flag for passing config file
- Modified some config keys
  - cmdArgs -> Args
  - Got rid of `hosts.config`
- better SSH handling
  - respects values in config file

pkg/backy/utils.go

@@ -0,0 +1,209 @@
+// utils.go
+// Copyright (C) Andrew Woodlee 2023
+// License: Apache-2.0
+
+package backy
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
+
+	"git.andrewnw.xyz/CyberShell/backy/pkg/logging"
+	"github.com/joho/godotenv"
+	"github.com/rs/zerolog"
+	"github.com/spf13/viper"
+	"golang.org/x/crypto/ssh"
+)
+
+func injectEnvIntoSSH(envVarsToInject environmentVars, process *ssh.Session, log *zerolog.Logger) {
+	if envVarsToInject.file != "" {
+		envPath, envPathErr := resolveDir(envVarsToInject.file)
+		if envPathErr != nil {
+			log.Fatal().Str("envFile", envPath).Err(envPathErr).Send()
+		}
+		file, err := os.Open(envPath)
+		if err != nil {
+			log.Fatal().Str("envFile", envPath).Err(err).Send()
+		}
+		defer file.Close()
+
+		envMap, err := godotenv.Parse(file)
+		if err != nil {
+			log.Error().Str("envFile", envPath).Err(err).Send()
+			goto errEnvFile
+		}
+		for key, val := range envMap {
+			process.Setenv(key, val)
+		}
+	}
+
+errEnvFile:
+	if len(envVarsToInject.env) > 0 {
+		for _, envVal := range envVarsToInject.env {
+			// don't append env Vars for Backy
+			if strings.Contains(envVal, "=") && !strings.HasPrefix(envVal, "BACKY_") {
+				envVarArr := strings.Split(envVal, "=")
+				process.Setenv(envVarArr[0], envVarArr[1])
+			}
+		}
+	}
+}
+
+func injectEnvIntoLocalCMD(envVarsToInject environmentVars, process *exec.Cmd, log *zerolog.Logger) {
+	if envVarsToInject.file != "" {
+		envPath, _ := resolveDir(envVarsToInject.file)
+
+		file, _ := os.Open(envPath)
+		// if err != nil {
+		// 	log.Fatal().Str("envFile", envPath).Err(err).Send()
+		// }
+		defer file.Close()
+		envMap, err := godotenv.Parse(file)
+		if err != nil {
+			log.Error().Str("envFile", envPath).Err(err).Send()
+			goto errEnvFile
+		}
+		for key, val := range envMap {
+			process.Env = append(process.Env, fmt.Sprintf("%s=%s", key, val))
+		}
+
+	}
+errEnvFile:
+	if len(envVarsToInject.env) > 0 {
+		for _, envVal := range envVarsToInject.env {
+			if strings.Contains(envVal, "=") {
+				process.Env = append(process.Env, envVal)
+			}
+		}
+	}
+	envVarsToInject.env = append(envVarsToInject.env, os.Environ()...)
+}
+
+func (cmd *Command) checkCmdExists() bool {
+	_, err := exec.LookPath(cmd.Cmd)
+	return err == nil
+}
+
+func contains(s []string, e string) bool {
+	for _, a := range s {
+		if a == e {
+			return true
+		}
+	}
+	return false
+}
+
+func CheckConfigValues(config *viper.Viper) {
+
+	for _, key := range requiredKeys {
+		isKeySet := config.IsSet(key)
+		if !isKeySet {
+			logging.ExitWithMSG(Sprintf("Config key %s is not defined in %s", key, config.ConfigFileUsed()), 1, nil)
+		}
+
+	}
+}
+
+func testFile(c string) error {
+	if strings.TrimSpace(c) != "" {
+		file, fileOpenErr := os.Open(c)
+		file.Close()
+		if errors.Is(fileOpenErr, os.ErrNotExist) {
+			return fileOpenErr
+		}
+
+		fmt.Printf("%s\t\t%v", c, fileOpenErr)
+	}
+
+	return nil
+}
+
+func (c *BackyConfigOpts) LogLvl(level string) BackyOptionFunc {
+
+	return func(bco *BackyConfigOpts) {
+		c.BackyLogLvl = &level
+	}
+}
+
+// AddCommands adds commands to BackyConfigOpts
+func AddCommands(commands []string) BackyOptionFunc {
+	return func(bco *BackyConfigOpts) {
+		bco.executeCmds = append(bco.executeCmds, commands...)
+	}
+}
+
+// AddCommandLists adds lists to BackyConfigOpts
+func AddCommandLists(lists []string) BackyOptionFunc {
+	return func(bco *BackyConfigOpts) {
+		bco.executeLists = append(bco.executeLists, lists...)
+	}
+}
+
+// UseCron enables the execution of command lists at specified times
+func UseCron() BackyOptionFunc {
+	return func(bco *BackyConfigOpts) {
+		bco.useCron = true
+	}
+}
+
+// UseCron enables the execution of command lists at specified times
+func (c *BackyConfigOpts) AddViper(v *viper.Viper) BackyOptionFunc {
+	return func(bco *BackyConfigOpts) {
+		c.viper = v
+	}
+}
+
+func NewOpts(configFilePath string, opts ...BackyOptionFunc) *BackyConfigOpts {
+	b := &BackyConfigOpts{}
+	b.ConfigFilePath = configFilePath
+	for _, opt := range opts {
+		if opt != nil {
+			opt(b)
+		}
+	}
+	return b
+}
+
+/*
+NewConfig initializes new config that holds information	from the config file
+*/
+func NewConfig() *BackyConfigFile {
+	return &BackyConfigFile{
+		Cmds:           make(map[string]*Command),
+		CmdConfigLists: make(map[string]*CmdList),
+		Hosts:          make(map[string]*Host),
+		Notifications:  make(map[string]*NotificationsConfig),
+	}
+}
+
+func IsTerminalActive() bool {
+	return os.Getenv("BACKY_TERM") == "enabled"
+}
+
+func IsCmdStdOutEnabled() bool {
+	return os.Getenv("BACKY_STDOUT") == "enabled"
+}
+
+func resolveDir(path string) (string, error) {
+	if path == "~" {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			return path, err
+		}
+		// In case of "~", which won't be caught by the "else if"
+		path = homeDir
+	} else if strings.HasPrefix(path, "~/") {
+		homeDir, err := os.UserHomeDir()
+		if err != nil {
+			return path, err
+		}
+		// Use strings.HasPrefix so we don't match paths like
+		// "/something/~/something/"
+		path = filepath.Join(homeDir, path[2:])
+	}
+	return path, nil
+}