Merge pull request #7 from yogin/gosh

New gosh cli to replace ec2

Author: yogin

.gitignore

@@ -16,3 +16,6 @@
 
 .DS_Store
 ec2
+.gosh.yaml*
+.gosh.yml*
+.gosh.json*

cmd/gosh/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/yogin/go-ec2/internal/config"
+	"github.com/yogin/go-ec2/internal/service"
+)
+
+func main() {
+	configPath := flag.String("c", "", "Configuration file path")
+	flag.Parse()
+
+	cfg := config.NewConfig(configPath)
+
+	service := service.NewService(cfg)
+	if err := service.Run(); err != nil {
+		fmt.Printf("error: %s\n", err)
+		os.Exit(1)
+	}
+}

go.mod

@@ -4,9 +4,9 @@ go 1.13
 
 require (
 	github.com/aws/aws-sdk-go v1.29.18
-	github.com/gdamore/tcell/v2 v2.2.0
+	github.com/gdamore/tcell/v2 v2.7.4
 	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
-	github.com/rivo/tview v0.0.0-20210217110421-8a8f78a6dd01
-	golang.org/x/sys v0.0.0-20210303074136-134d130e1a04 // indirect
-	golang.org/x/term v0.0.0-20210220032956-6a3ed077a48d // indirect
+	github.com/rivo/tview v0.0.0-20240307173318-e804876934a1
+	golang.org/x/term v0.18.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -7,6 +7,9 @@ github.com/gdamore/encoding v1.0.0/go.mod h1:alR0ol34c49FCSBLjhosxzcPHQbf2trDkoo
 github.com/gdamore/tcell/v2 v2.0.1-0.20201017141208-acf90d56d591/go.mod h1:vSVL/GV5mCSlPC6thFP5kfOFdM9MGZcalipmpTxTgQA=
 github.com/gdamore/tcell/v2 v2.2.0 h1:vSyEgKwraXPSOkvCk7IwOSyX+Pv3V2cV9CikJMXg4U4=
 github.com/gdamore/tcell/v2 v2.2.0/go.mod h1:cTTuF84Dlj/RqmaCIV5p4w8uG1zWdk0SF6oBpwHp4fU=
+github.com/gdamore/tcell/v2 v2.7.1/go.mod h1:dSXtXTSK0VsW1biw65DZLZ2NKr7j0qP/0J7ONmsraWg=
+github.com/gdamore/tcell/v2 v2.7.4 h1:sg6/UnTM9jGpZU+oFYAsDahfchWAFW8Xx2yFinNSAYU=
+github.com/gdamore/tcell/v2 v2.7.4/go.mod h1:dSXtXTSK0VsW1biw65DZLZ2NKr7j0qP/0J7ONmsraWg=
 github.com/go-sql-driver/mysql v1.5.0/go.mod h1:DCzpHaOWr8IXmIStZouvnhqoel9Qv2LBy8hT2VhHyBg=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af h1:pmfjZENx5imkbgOkpRUYLnmbU7UEFbjtDA2hxJ1ichM=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
@@ -17,37 +20,80 @@ github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i
 github.com/mattn/go-runewidth v0.0.7/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m2gUSrubnMI=
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 github.com/mattn/go-runewidth v0.0.10/go.mod h1:RAqKPSqVFrSLVXbA8x7dzmKdmGzieGRCM46jaSJTDAk=
+github.com/mattn/go-runewidth v0.0.15 h1:UNAjwbU9l54TA3KzvqLGxwWjHmMgBUVhBiTjelZgg3U=
+github.com/mattn/go-runewidth v0.0.15/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
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internal/config/config.go

@@ -0,0 +1,181 @@
+package config
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/yogin/go-ec2/internal/utils"
+	"gopkg.in/yaml.v3"
+)
+
+const (
+	DefaultConfigFile    = "gosh.yaml"           // DefaultConfigFile is the default configuration file name
+	CurrentConfigVersion = 1                     // CurrentConfigVersion is the current configuration version
+	DefaultTimeFormat    = "2006-01-02 15:04:05" // DefaultTimeFormat is the default time format
+)
+
+var (
+	config *Config // config is the global configuration
+)
+
+type Config struct {
+	Version       int        `json:"version" yaml:"version"`
+	Profiles      []*Profile `json:"profiles" yaml:"profiles"`
+	ShowUTCTime   bool       `json:"show_utc_time" yaml:"show_utc_time"`     // show UTC time (default: false)
+	ShowLocalTime bool       `json:"show_local_time" yaml:"show_local_time"` // show local time (default: false)
+	TimeFormat    string     `json:"time_format" yaml:"time_format"`         // time format (default: "2006-01-02 15:04:05")
+
+	configPath string
+}
+
+type Profile struct {
+	ID             string  `json:"id" yaml:"id"`                             // profile id (unique, used for navigation)
+	Provider       string  `json:"provider" yaml:"provider"`                 // aws, gcp, azure (only aws is supported for now)
+	Name           string  `json:"name" yaml:"name"`                         // provider profile name (eg. aws profile name)
+	Region         string  `json:"region" yaml:"region"`                     // region (us-west-1, us-east-1, etc)
+	PreferPublicIP bool    `json:"prefer_public_ip" yaml:"prefer_public_ip"` // prefer public IP over private IP (default: false)
+	Refresh        Refresh `json:"refresh" yaml:"refresh"`                   // auto refresh settings
+}
+
+type Refresh struct {
+	Enabled  bool `json:"enabled" yaml:"enabled"`   // auto refresh enabled (default: false)
+	Interval int  `json:"interval" yaml:"interval"` // refresh interval in seconds (default: 60)
+}
+
+func NewConfig(path *string) *Config {
+	if config != nil {
+		return config
+	}
+
+	config = DefaultConfiguration()
+
+	if path != nil {
+		config.configPath = *path
+	}
+
+	if config.findConfigFile() {
+		config.Profiles = make([]*Profile, 0) // reset default profiles if configuration file is found
+
+		if err := config.loadConfigFile(); err != nil {
+			fmt.Printf("error: %s\n", err)
+			os.Exit(1)
+		}
+	}
+
+	return config
+}
+
+func (c *Config) Save() error {
+	data, err := yaml.Marshal(c)
+	if err != nil {
+		return err
+	}
+
+	if len(c.configPath) == 0 {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return err
+		}
+
+		c.configPath = filepath.Join(home, fmt.Sprintf(".%s", DefaultConfigFile))
+	}
+
+	err = os.WriteFile(c.configPath, data, 0644)
+	return err
+}
+
+func (c *Config) ConfigPath() string {
+	return c.configPath
+}
+
+func DefaultConfiguration() *Config {
+	profile := Profile{
+		ID:       "default",
+		Provider: "aws",
+		Name:     "default",
+		Refresh:  Refresh{Enabled: true, Interval: 60},
+	}
+
+	return &Config{
+		Version:       CurrentConfigVersion,
+		Profiles:      []*Profile{&profile},
+		ShowUTCTime:   true,
+		ShowLocalTime: true,
+		TimeFormat:    DefaultTimeFormat,
+	}
+}
+
+func (c *Config) loadYAMLConfigFile() error {
+	data, err := os.ReadFile(c.configPath)
+	if err != nil {
+		return err
+	}
+
+	if err = yaml.Unmarshal(data, c); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *Config) loadJSONConfigFile() error {
+	data, err := os.ReadFile(c.configPath)
+	if err != nil {
+		return err
+	}
+
+	if err = json.Unmarshal(data, c); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *Config) loadConfigFile() error {
+	// try to load yaml configuration file
+	if strings.HasSuffix(c.configPath, ".yaml") || strings.HasSuffix(c.configPath, ".yml") {
+		return c.loadYAMLConfigFile()
+	}
+
+	// try to load json configuration file
+	if strings.HasSuffix(c.configPath, ".json") {
+		return c.loadJSONConfigFile()
+	}
+
+	return errors.New("unsupported configuration file format")
+}
+
+func (c *Config) findConfigFile() bool {
+	// if the configuration file is provided and exists, use it
+	if len(c.configPath) > 0 && utils.IsFile(c.configPath) {
+		return true
+	}
+
+	// if not found, check for configuration file in the current directory
+	if path := fmt.Sprintf(".%s", DefaultConfigFile); utils.IsFile(path) {
+		c.configPath = path
+		return true
+	}
+
+	// if not found, check for configuration file in the home directory
+	if home, err := os.UserHomeDir(); err == nil {
+		if path := filepath.Join(home, fmt.Sprintf(".%s", DefaultConfigFile)); utils.IsFile(path) {
+			c.configPath = path
+			return true
+		}
+	}
+
+	// if not found, check for global configuration file
+	if utils.IsDirectory("/etc") {
+		if path := fmt.Sprintf("/etc/%s", DefaultConfigFile); utils.IsFile(path) {
+			c.configPath = path
+			return true
+		}
+	}
+
+	return false
+}